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Merge remote-tracking branch 'remotes/xtensa/tags/20190204-xtensa' into staging
[mirror_qemu.git] / tcg / s390 / tcg-target.inc.c
1 /*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2009 Ulrich Hecht <uli@suse.de>
5 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
6 * Copyright (c) 2010 Richard Henderson <rth@twiddle.net>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27 /* We only support generating code for 64-bit mode. */
28 #if TCG_TARGET_REG_BITS != 64
29 #error "unsupported code generation mode"
30 #endif
31
32 #include "tcg-pool.inc.c"
33 #include "elf.h"
34
35 /* ??? The translation blocks produced by TCG are generally small enough to
36 be entirely reachable with a 16-bit displacement. Leaving the option for
37 a 32-bit displacement here Just In Case. */
38 #define USE_LONG_BRANCHES 0
39
40 #define TCG_CT_CONST_S16 0x100
41 #define TCG_CT_CONST_S32 0x200
42 #define TCG_CT_CONST_S33 0x400
43 #define TCG_CT_CONST_ZERO 0x800
44
45 /* Several places within the instruction set 0 means "no register"
46 rather than TCG_REG_R0. */
47 #define TCG_REG_NONE 0
48
49 /* A scratch register that may be be used throughout the backend. */
50 #define TCG_TMP0 TCG_REG_R1
51
52 /* A scratch register that holds a pointer to the beginning of the TB.
53 We don't need this when we have pc-relative loads with the general
54 instructions extension facility. */
55 #define TCG_REG_TB TCG_REG_R12
56 #define USE_REG_TB (!(s390_facilities & FACILITY_GEN_INST_EXT))
57
58 #ifndef CONFIG_SOFTMMU
59 #define TCG_GUEST_BASE_REG TCG_REG_R13
60 #endif
61
62 /* All of the following instructions are prefixed with their instruction
63 format, and are defined as 8- or 16-bit quantities, even when the two
64 halves of the 16-bit quantity may appear 32 bits apart in the insn.
65 This makes it easy to copy the values from the tables in Appendix B. */
66 typedef enum S390Opcode {
67 RIL_AFI = 0xc209,
68 RIL_AGFI = 0xc208,
69 RIL_ALFI = 0xc20b,
70 RIL_ALGFI = 0xc20a,
71 RIL_BRASL = 0xc005,
72 RIL_BRCL = 0xc004,
73 RIL_CFI = 0xc20d,
74 RIL_CGFI = 0xc20c,
75 RIL_CLFI = 0xc20f,
76 RIL_CLGFI = 0xc20e,
77 RIL_CLRL = 0xc60f,
78 RIL_CLGRL = 0xc60a,
79 RIL_CRL = 0xc60d,
80 RIL_CGRL = 0xc608,
81 RIL_IIHF = 0xc008,
82 RIL_IILF = 0xc009,
83 RIL_LARL = 0xc000,
84 RIL_LGFI = 0xc001,
85 RIL_LGRL = 0xc408,
86 RIL_LLIHF = 0xc00e,
87 RIL_LLILF = 0xc00f,
88 RIL_LRL = 0xc40d,
89 RIL_MSFI = 0xc201,
90 RIL_MSGFI = 0xc200,
91 RIL_NIHF = 0xc00a,
92 RIL_NILF = 0xc00b,
93 RIL_OIHF = 0xc00c,
94 RIL_OILF = 0xc00d,
95 RIL_SLFI = 0xc205,
96 RIL_SLGFI = 0xc204,
97 RIL_XIHF = 0xc006,
98 RIL_XILF = 0xc007,
99
100 RI_AGHI = 0xa70b,
101 RI_AHI = 0xa70a,
102 RI_BRC = 0xa704,
103 RI_CHI = 0xa70e,
104 RI_CGHI = 0xa70f,
105 RI_IIHH = 0xa500,
106 RI_IIHL = 0xa501,
107 RI_IILH = 0xa502,
108 RI_IILL = 0xa503,
109 RI_LGHI = 0xa709,
110 RI_LLIHH = 0xa50c,
111 RI_LLIHL = 0xa50d,
112 RI_LLILH = 0xa50e,
113 RI_LLILL = 0xa50f,
114 RI_MGHI = 0xa70d,
115 RI_MHI = 0xa70c,
116 RI_NIHH = 0xa504,
117 RI_NIHL = 0xa505,
118 RI_NILH = 0xa506,
119 RI_NILL = 0xa507,
120 RI_OIHH = 0xa508,
121 RI_OIHL = 0xa509,
122 RI_OILH = 0xa50a,
123 RI_OILL = 0xa50b,
124
125 RIE_CGIJ = 0xec7c,
126 RIE_CGRJ = 0xec64,
127 RIE_CIJ = 0xec7e,
128 RIE_CLGRJ = 0xec65,
129 RIE_CLIJ = 0xec7f,
130 RIE_CLGIJ = 0xec7d,
131 RIE_CLRJ = 0xec77,
132 RIE_CRJ = 0xec76,
133 RIE_LOCGHI = 0xec46,
134 RIE_RISBG = 0xec55,
135
136 RRE_AGR = 0xb908,
137 RRE_ALGR = 0xb90a,
138 RRE_ALCR = 0xb998,
139 RRE_ALCGR = 0xb988,
140 RRE_CGR = 0xb920,
141 RRE_CLGR = 0xb921,
142 RRE_DLGR = 0xb987,
143 RRE_DLR = 0xb997,
144 RRE_DSGFR = 0xb91d,
145 RRE_DSGR = 0xb90d,
146 RRE_FLOGR = 0xb983,
147 RRE_LGBR = 0xb906,
148 RRE_LCGR = 0xb903,
149 RRE_LGFR = 0xb914,
150 RRE_LGHR = 0xb907,
151 RRE_LGR = 0xb904,
152 RRE_LLGCR = 0xb984,
153 RRE_LLGFR = 0xb916,
154 RRE_LLGHR = 0xb985,
155 RRE_LRVR = 0xb91f,
156 RRE_LRVGR = 0xb90f,
157 RRE_LTGR = 0xb902,
158 RRE_MLGR = 0xb986,
159 RRE_MSGR = 0xb90c,
160 RRE_MSR = 0xb252,
161 RRE_NGR = 0xb980,
162 RRE_OGR = 0xb981,
163 RRE_SGR = 0xb909,
164 RRE_SLGR = 0xb90b,
165 RRE_SLBR = 0xb999,
166 RRE_SLBGR = 0xb989,
167 RRE_XGR = 0xb982,
168
169 RRF_LOCR = 0xb9f2,
170 RRF_LOCGR = 0xb9e2,
171 RRF_NRK = 0xb9f4,
172 RRF_NGRK = 0xb9e4,
173 RRF_ORK = 0xb9f6,
174 RRF_OGRK = 0xb9e6,
175 RRF_SRK = 0xb9f9,
176 RRF_SGRK = 0xb9e9,
177 RRF_SLRK = 0xb9fb,
178 RRF_SLGRK = 0xb9eb,
179 RRF_XRK = 0xb9f7,
180 RRF_XGRK = 0xb9e7,
181
182 RR_AR = 0x1a,
183 RR_ALR = 0x1e,
184 RR_BASR = 0x0d,
185 RR_BCR = 0x07,
186 RR_CLR = 0x15,
187 RR_CR = 0x19,
188 RR_DR = 0x1d,
189 RR_LCR = 0x13,
190 RR_LR = 0x18,
191 RR_LTR = 0x12,
192 RR_NR = 0x14,
193 RR_OR = 0x16,
194 RR_SR = 0x1b,
195 RR_SLR = 0x1f,
196 RR_XR = 0x17,
197
198 RSY_RLL = 0xeb1d,
199 RSY_RLLG = 0xeb1c,
200 RSY_SLLG = 0xeb0d,
201 RSY_SLLK = 0xebdf,
202 RSY_SRAG = 0xeb0a,
203 RSY_SRAK = 0xebdc,
204 RSY_SRLG = 0xeb0c,
205 RSY_SRLK = 0xebde,
206
207 RS_SLL = 0x89,
208 RS_SRA = 0x8a,
209 RS_SRL = 0x88,
210
211 RXY_AG = 0xe308,
212 RXY_AY = 0xe35a,
213 RXY_CG = 0xe320,
214 RXY_CLG = 0xe321,
215 RXY_CLY = 0xe355,
216 RXY_CY = 0xe359,
217 RXY_LAY = 0xe371,
218 RXY_LB = 0xe376,
219 RXY_LG = 0xe304,
220 RXY_LGB = 0xe377,
221 RXY_LGF = 0xe314,
222 RXY_LGH = 0xe315,
223 RXY_LHY = 0xe378,
224 RXY_LLGC = 0xe390,
225 RXY_LLGF = 0xe316,
226 RXY_LLGH = 0xe391,
227 RXY_LMG = 0xeb04,
228 RXY_LRV = 0xe31e,
229 RXY_LRVG = 0xe30f,
230 RXY_LRVH = 0xe31f,
231 RXY_LY = 0xe358,
232 RXY_NG = 0xe380,
233 RXY_OG = 0xe381,
234 RXY_STCY = 0xe372,
235 RXY_STG = 0xe324,
236 RXY_STHY = 0xe370,
237 RXY_STMG = 0xeb24,
238 RXY_STRV = 0xe33e,
239 RXY_STRVG = 0xe32f,
240 RXY_STRVH = 0xe33f,
241 RXY_STY = 0xe350,
242 RXY_XG = 0xe382,
243
244 RX_A = 0x5a,
245 RX_C = 0x59,
246 RX_L = 0x58,
247 RX_LA = 0x41,
248 RX_LH = 0x48,
249 RX_ST = 0x50,
250 RX_STC = 0x42,
251 RX_STH = 0x40,
252
253 NOP = 0x0707,
254 } S390Opcode;
255
256 #ifdef CONFIG_DEBUG_TCG
257 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
258 "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7",
259 "%r8", "%r9", "%r10" "%r11" "%r12" "%r13" "%r14" "%r15"
260 };
261 #endif
262
263 /* Since R6 is a potential argument register, choose it last of the
264 call-saved registers. Likewise prefer the call-clobbered registers
265 in reverse order to maximize the chance of avoiding the arguments. */
266 static const int tcg_target_reg_alloc_order[] = {
267 /* Call saved registers. */
268 TCG_REG_R13,
269 TCG_REG_R12,
270 TCG_REG_R11,
271 TCG_REG_R10,
272 TCG_REG_R9,
273 TCG_REG_R8,
274 TCG_REG_R7,
275 TCG_REG_R6,
276 /* Call clobbered registers. */
277 TCG_REG_R14,
278 TCG_REG_R0,
279 TCG_REG_R1,
280 /* Argument registers, in reverse order of allocation. */
281 TCG_REG_R5,
282 TCG_REG_R4,
283 TCG_REG_R3,
284 TCG_REG_R2,
285 };
286
287 static const int tcg_target_call_iarg_regs[] = {
288 TCG_REG_R2,
289 TCG_REG_R3,
290 TCG_REG_R4,
291 TCG_REG_R5,
292 TCG_REG_R6,
293 };
294
295 static const int tcg_target_call_oarg_regs[] = {
296 TCG_REG_R2,
297 };
298
299 #define S390_CC_EQ 8
300 #define S390_CC_LT 4
301 #define S390_CC_GT 2
302 #define S390_CC_OV 1
303 #define S390_CC_NE (S390_CC_LT | S390_CC_GT)
304 #define S390_CC_LE (S390_CC_LT | S390_CC_EQ)
305 #define S390_CC_GE (S390_CC_GT | S390_CC_EQ)
306 #define S390_CC_NEVER 0
307 #define S390_CC_ALWAYS 15
308
309 /* Condition codes that result from a COMPARE and COMPARE LOGICAL. */
310 static const uint8_t tcg_cond_to_s390_cond[] = {
311 [TCG_COND_EQ] = S390_CC_EQ,
312 [TCG_COND_NE] = S390_CC_NE,
313 [TCG_COND_LT] = S390_CC_LT,
314 [TCG_COND_LE] = S390_CC_LE,
315 [TCG_COND_GT] = S390_CC_GT,
316 [TCG_COND_GE] = S390_CC_GE,
317 [TCG_COND_LTU] = S390_CC_LT,
318 [TCG_COND_LEU] = S390_CC_LE,
319 [TCG_COND_GTU] = S390_CC_GT,
320 [TCG_COND_GEU] = S390_CC_GE,
321 };
322
323 /* Condition codes that result from a LOAD AND TEST. Here, we have no
324 unsigned instruction variation, however since the test is vs zero we
325 can re-map the outcomes appropriately. */
326 static const uint8_t tcg_cond_to_ltr_cond[] = {
327 [TCG_COND_EQ] = S390_CC_EQ,
328 [TCG_COND_NE] = S390_CC_NE,
329 [TCG_COND_LT] = S390_CC_LT,
330 [TCG_COND_LE] = S390_CC_LE,
331 [TCG_COND_GT] = S390_CC_GT,
332 [TCG_COND_GE] = S390_CC_GE,
333 [TCG_COND_LTU] = S390_CC_NEVER,
334 [TCG_COND_LEU] = S390_CC_EQ,
335 [TCG_COND_GTU] = S390_CC_NE,
336 [TCG_COND_GEU] = S390_CC_ALWAYS,
337 };
338
339 #ifdef CONFIG_SOFTMMU
340 static void * const qemu_ld_helpers[16] = {
341 [MO_UB] = helper_ret_ldub_mmu,
342 [MO_SB] = helper_ret_ldsb_mmu,
343 [MO_LEUW] = helper_le_lduw_mmu,
344 [MO_LESW] = helper_le_ldsw_mmu,
345 [MO_LEUL] = helper_le_ldul_mmu,
346 [MO_LESL] = helper_le_ldsl_mmu,
347 [MO_LEQ] = helper_le_ldq_mmu,
348 [MO_BEUW] = helper_be_lduw_mmu,
349 [MO_BESW] = helper_be_ldsw_mmu,
350 [MO_BEUL] = helper_be_ldul_mmu,
351 [MO_BESL] = helper_be_ldsl_mmu,
352 [MO_BEQ] = helper_be_ldq_mmu,
353 };
354
355 static void * const qemu_st_helpers[16] = {
356 [MO_UB] = helper_ret_stb_mmu,
357 [MO_LEUW] = helper_le_stw_mmu,
358 [MO_LEUL] = helper_le_stl_mmu,
359 [MO_LEQ] = helper_le_stq_mmu,
360 [MO_BEUW] = helper_be_stw_mmu,
361 [MO_BEUL] = helper_be_stl_mmu,
362 [MO_BEQ] = helper_be_stq_mmu,
363 };
364 #endif
365
366 static tcg_insn_unit *tb_ret_addr;
367 uint64_t s390_facilities;
368
369 static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
370 intptr_t value, intptr_t addend)
371 {
372 intptr_t pcrel2;
373 uint32_t old;
374
375 value += addend;
376 pcrel2 = (tcg_insn_unit *)value - code_ptr;
377
378 switch (type) {
379 case R_390_PC16DBL:
380 if (pcrel2 == (int16_t)pcrel2) {
381 tcg_patch16(code_ptr, pcrel2);
382 return true;
383 }
384 break;
385 case R_390_PC32DBL:
386 if (pcrel2 == (int32_t)pcrel2) {
387 tcg_patch32(code_ptr, pcrel2);
388 return true;
389 }
390 break;
391 case R_390_20:
392 if (value == sextract64(value, 0, 20)) {
393 old = *(uint32_t *)code_ptr & 0xf00000ff;
394 old |= ((value & 0xfff) << 16) | ((value & 0xff000) >> 4);
395 tcg_patch32(code_ptr, old);
396 return true;
397 }
398 break;
399 default:
400 g_assert_not_reached();
401 }
402 return false;
403 }
404
405 /* parse target specific constraints */
406 static const char *target_parse_constraint(TCGArgConstraint *ct,
407 const char *ct_str, TCGType type)
408 {
409 switch (*ct_str++) {
410 case 'r': /* all registers */
411 ct->ct |= TCG_CT_REG;
412 ct->u.regs = 0xffff;
413 break;
414 case 'L': /* qemu_ld/st constraint */
415 ct->ct |= TCG_CT_REG;
416 ct->u.regs = 0xffff;
417 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2);
418 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R3);
419 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R4);
420 break;
421 case 'a': /* force R2 for division */
422 ct->ct |= TCG_CT_REG;
423 ct->u.regs = 0;
424 tcg_regset_set_reg(ct->u.regs, TCG_REG_R2);
425 break;
426 case 'b': /* force R3 for division */
427 ct->ct |= TCG_CT_REG;
428 ct->u.regs = 0;
429 tcg_regset_set_reg(ct->u.regs, TCG_REG_R3);
430 break;
431 case 'A':
432 ct->ct |= TCG_CT_CONST_S33;
433 break;
434 case 'I':
435 ct->ct |= TCG_CT_CONST_S16;
436 break;
437 case 'J':
438 ct->ct |= TCG_CT_CONST_S32;
439 break;
440 case 'Z':
441 ct->ct |= TCG_CT_CONST_ZERO;
442 break;
443 default:
444 return NULL;
445 }
446 return ct_str;
447 }
448
449 /* Test if a constant matches the constraint. */
450 static int tcg_target_const_match(tcg_target_long val, TCGType type,
451 const TCGArgConstraint *arg_ct)
452 {
453 int ct = arg_ct->ct;
454
455 if (ct & TCG_CT_CONST) {
456 return 1;
457 }
458
459 if (type == TCG_TYPE_I32) {
460 val = (int32_t)val;
461 }
462
463 /* The following are mutually exclusive. */
464 if (ct & TCG_CT_CONST_S16) {
465 return val == (int16_t)val;
466 } else if (ct & TCG_CT_CONST_S32) {
467 return val == (int32_t)val;
468 } else if (ct & TCG_CT_CONST_S33) {
469 return val >= -0xffffffffll && val <= 0xffffffffll;
470 } else if (ct & TCG_CT_CONST_ZERO) {
471 return val == 0;
472 }
473
474 return 0;
475 }
476
477 /* Emit instructions according to the given instruction format. */
478
479 static void tcg_out_insn_RR(TCGContext *s, S390Opcode op, TCGReg r1, TCGReg r2)
480 {
481 tcg_out16(s, (op << 8) | (r1 << 4) | r2);
482 }
483
484 static void tcg_out_insn_RRE(TCGContext *s, S390Opcode op,
485 TCGReg r1, TCGReg r2)
486 {
487 tcg_out32(s, (op << 16) | (r1 << 4) | r2);
488 }
489
490 static void tcg_out_insn_RRF(TCGContext *s, S390Opcode op,
491 TCGReg r1, TCGReg r2, int m3)
492 {
493 tcg_out32(s, (op << 16) | (m3 << 12) | (r1 << 4) | r2);
494 }
495
496 static void tcg_out_insn_RI(TCGContext *s, S390Opcode op, TCGReg r1, int i2)
497 {
498 tcg_out32(s, (op << 16) | (r1 << 20) | (i2 & 0xffff));
499 }
500
501 static void tcg_out_insn_RIE(TCGContext *s, S390Opcode op, TCGReg r1,
502 int i2, int m3)
503 {
504 tcg_out16(s, (op & 0xff00) | (r1 << 4) | m3);
505 tcg_out32(s, (i2 << 16) | (op & 0xff));
506 }
507
508 static void tcg_out_insn_RIL(TCGContext *s, S390Opcode op, TCGReg r1, int i2)
509 {
510 tcg_out16(s, op | (r1 << 4));
511 tcg_out32(s, i2);
512 }
513
514 static void tcg_out_insn_RS(TCGContext *s, S390Opcode op, TCGReg r1,
515 TCGReg b2, TCGReg r3, int disp)
516 {
517 tcg_out32(s, (op << 24) | (r1 << 20) | (r3 << 16) | (b2 << 12)
518 | (disp & 0xfff));
519 }
520
521 static void tcg_out_insn_RSY(TCGContext *s, S390Opcode op, TCGReg r1,
522 TCGReg b2, TCGReg r3, int disp)
523 {
524 tcg_out16(s, (op & 0xff00) | (r1 << 4) | r3);
525 tcg_out32(s, (op & 0xff) | (b2 << 28)
526 | ((disp & 0xfff) << 16) | ((disp & 0xff000) >> 4));
527 }
528
529 #define tcg_out_insn_RX tcg_out_insn_RS
530 #define tcg_out_insn_RXY tcg_out_insn_RSY
531
532 /* Emit an opcode with "type-checking" of the format. */
533 #define tcg_out_insn(S, FMT, OP, ...) \
534 glue(tcg_out_insn_,FMT)(S, glue(glue(FMT,_),OP), ## __VA_ARGS__)
535
536
537 /* emit 64-bit shifts */
538 static void tcg_out_sh64(TCGContext* s, S390Opcode op, TCGReg dest,
539 TCGReg src, TCGReg sh_reg, int sh_imm)
540 {
541 tcg_out_insn_RSY(s, op, dest, sh_reg, src, sh_imm);
542 }
543
544 /* emit 32-bit shifts */
545 static void tcg_out_sh32(TCGContext* s, S390Opcode op, TCGReg dest,
546 TCGReg sh_reg, int sh_imm)
547 {
548 tcg_out_insn_RS(s, op, dest, sh_reg, 0, sh_imm);
549 }
550
551 static void tcg_out_mov(TCGContext *s, TCGType type, TCGReg dst, TCGReg src)
552 {
553 if (src != dst) {
554 if (type == TCG_TYPE_I32) {
555 tcg_out_insn(s, RR, LR, dst, src);
556 } else {
557 tcg_out_insn(s, RRE, LGR, dst, src);
558 }
559 }
560 }
561
562 static const S390Opcode lli_insns[4] = {
563 RI_LLILL, RI_LLILH, RI_LLIHL, RI_LLIHH
564 };
565
566 static bool maybe_out_small_movi(TCGContext *s, TCGType type,
567 TCGReg ret, tcg_target_long sval)
568 {
569 tcg_target_ulong uval = sval;
570 int i;
571
572 if (type == TCG_TYPE_I32) {
573 uval = (uint32_t)sval;
574 sval = (int32_t)sval;
575 }
576
577 /* Try all 32-bit insns that can load it in one go. */
578 if (sval >= -0x8000 && sval < 0x8000) {
579 tcg_out_insn(s, RI, LGHI, ret, sval);
580 return true;
581 }
582
583 for (i = 0; i < 4; i++) {
584 tcg_target_long mask = 0xffffull << i*16;
585 if ((uval & mask) == uval) {
586 tcg_out_insn_RI(s, lli_insns[i], ret, uval >> i*16);
587 return true;
588 }
589 }
590
591 return false;
592 }
593
594 /* load a register with an immediate value */
595 static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret,
596 tcg_target_long sval, bool in_prologue)
597 {
598 tcg_target_ulong uval;
599
600 /* Try all 32-bit insns that can load it in one go. */
601 if (maybe_out_small_movi(s, type, ret, sval)) {
602 return;
603 }
604
605 uval = sval;
606 if (type == TCG_TYPE_I32) {
607 uval = (uint32_t)sval;
608 sval = (int32_t)sval;
609 }
610
611 /* Try all 48-bit insns that can load it in one go. */
612 if (s390_facilities & FACILITY_EXT_IMM) {
613 if (sval == (int32_t)sval) {
614 tcg_out_insn(s, RIL, LGFI, ret, sval);
615 return;
616 }
617 if (uval <= 0xffffffff) {
618 tcg_out_insn(s, RIL, LLILF, ret, uval);
619 return;
620 }
621 if ((uval & 0xffffffff) == 0) {
622 tcg_out_insn(s, RIL, LLIHF, ret, uval >> 32);
623 return;
624 }
625 }
626
627 /* Try for PC-relative address load. For odd addresses,
628 attempt to use an offset from the start of the TB. */
629 if ((sval & 1) == 0) {
630 ptrdiff_t off = tcg_pcrel_diff(s, (void *)sval) >> 1;
631 if (off == (int32_t)off) {
632 tcg_out_insn(s, RIL, LARL, ret, off);
633 return;
634 }
635 } else if (USE_REG_TB && !in_prologue) {
636 ptrdiff_t off = sval - (uintptr_t)s->code_gen_ptr;
637 if (off == sextract64(off, 0, 20)) {
638 /* This is certain to be an address within TB, and therefore
639 OFF will be negative; don't try RX_LA. */
640 tcg_out_insn(s, RXY, LAY, ret, TCG_REG_TB, TCG_REG_NONE, off);
641 return;
642 }
643 }
644
645 /* A 32-bit unsigned value can be loaded in 2 insns. And given
646 that LLILL, LLIHL, LLILF above did not succeed, we know that
647 both insns are required. */
648 if (uval <= 0xffffffff) {
649 tcg_out_insn(s, RI, LLILL, ret, uval);
650 tcg_out_insn(s, RI, IILH, ret, uval >> 16);
651 return;
652 }
653
654 /* Otherwise, stuff it in the constant pool. */
655 if (s390_facilities & FACILITY_GEN_INST_EXT) {
656 tcg_out_insn(s, RIL, LGRL, ret, 0);
657 new_pool_label(s, sval, R_390_PC32DBL, s->code_ptr - 2, 2);
658 } else if (USE_REG_TB && !in_prologue) {
659 tcg_out_insn(s, RXY, LG, ret, TCG_REG_TB, TCG_REG_NONE, 0);
660 new_pool_label(s, sval, R_390_20, s->code_ptr - 2,
661 -(intptr_t)s->code_gen_ptr);
662 } else {
663 TCGReg base = ret ? ret : TCG_TMP0;
664 tcg_out_insn(s, RIL, LARL, base, 0);
665 new_pool_label(s, sval, R_390_PC32DBL, s->code_ptr - 2, 2);
666 tcg_out_insn(s, RXY, LG, ret, base, TCG_REG_NONE, 0);
667 }
668 }
669
670 static void tcg_out_movi(TCGContext *s, TCGType type,
671 TCGReg ret, tcg_target_long sval)
672 {
673 tcg_out_movi_int(s, type, ret, sval, false);
674 }
675
676 /* Emit a load/store type instruction. Inputs are:
677 DATA: The register to be loaded or stored.
678 BASE+OFS: The effective address.
679 OPC_RX: If the operation has an RX format opcode (e.g. STC), otherwise 0.
680 OPC_RXY: The RXY format opcode for the operation (e.g. STCY). */
681
682 static void tcg_out_mem(TCGContext *s, S390Opcode opc_rx, S390Opcode opc_rxy,
683 TCGReg data, TCGReg base, TCGReg index,
684 tcg_target_long ofs)
685 {
686 if (ofs < -0x80000 || ofs >= 0x80000) {
687 /* Combine the low 20 bits of the offset with the actual load insn;
688 the high 44 bits must come from an immediate load. */
689 tcg_target_long low = ((ofs & 0xfffff) ^ 0x80000) - 0x80000;
690 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, ofs - low);
691 ofs = low;
692
693 /* If we were already given an index register, add it in. */
694 if (index != TCG_REG_NONE) {
695 tcg_out_insn(s, RRE, AGR, TCG_TMP0, index);
696 }
697 index = TCG_TMP0;
698 }
699
700 if (opc_rx && ofs >= 0 && ofs < 0x1000) {
701 tcg_out_insn_RX(s, opc_rx, data, base, index, ofs);
702 } else {
703 tcg_out_insn_RXY(s, opc_rxy, data, base, index, ofs);
704 }
705 }
706
707
708 /* load data without address translation or endianness conversion */
709 static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg data,
710 TCGReg base, intptr_t ofs)
711 {
712 if (type == TCG_TYPE_I32) {
713 tcg_out_mem(s, RX_L, RXY_LY, data, base, TCG_REG_NONE, ofs);
714 } else {
715 tcg_out_mem(s, 0, RXY_LG, data, base, TCG_REG_NONE, ofs);
716 }
717 }
718
719 static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg data,
720 TCGReg base, intptr_t ofs)
721 {
722 if (type == TCG_TYPE_I32) {
723 tcg_out_mem(s, RX_ST, RXY_STY, data, base, TCG_REG_NONE, ofs);
724 } else {
725 tcg_out_mem(s, 0, RXY_STG, data, base, TCG_REG_NONE, ofs);
726 }
727 }
728
729 static inline bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
730 TCGReg base, intptr_t ofs)
731 {
732 return false;
733 }
734
735 /* load data from an absolute host address */
736 static void tcg_out_ld_abs(TCGContext *s, TCGType type, TCGReg dest, void *abs)
737 {
738 intptr_t addr = (intptr_t)abs;
739
740 if ((s390_facilities & FACILITY_GEN_INST_EXT) && !(addr & 1)) {
741 ptrdiff_t disp = tcg_pcrel_diff(s, abs) >> 1;
742 if (disp == (int32_t)disp) {
743 if (type == TCG_TYPE_I32) {
744 tcg_out_insn(s, RIL, LRL, dest, disp);
745 } else {
746 tcg_out_insn(s, RIL, LGRL, dest, disp);
747 }
748 return;
749 }
750 }
751 if (USE_REG_TB) {
752 ptrdiff_t disp = abs - (void *)s->code_gen_ptr;
753 if (disp == sextract64(disp, 0, 20)) {
754 tcg_out_ld(s, type, dest, TCG_REG_TB, disp);
755 return;
756 }
757 }
758
759 tcg_out_movi(s, TCG_TYPE_PTR, dest, addr & ~0xffff);
760 tcg_out_ld(s, type, dest, dest, addr & 0xffff);
761 }
762
763 static inline void tcg_out_risbg(TCGContext *s, TCGReg dest, TCGReg src,
764 int msb, int lsb, int ofs, int z)
765 {
766 /* Format RIE-f */
767 tcg_out16(s, (RIE_RISBG & 0xff00) | (dest << 4) | src);
768 tcg_out16(s, (msb << 8) | (z << 7) | lsb);
769 tcg_out16(s, (ofs << 8) | (RIE_RISBG & 0xff));
770 }
771
772 static void tgen_ext8s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
773 {
774 if (s390_facilities & FACILITY_EXT_IMM) {
775 tcg_out_insn(s, RRE, LGBR, dest, src);
776 return;
777 }
778
779 if (type == TCG_TYPE_I32) {
780 if (dest == src) {
781 tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 24);
782 } else {
783 tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 24);
784 }
785 tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 24);
786 } else {
787 tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 56);
788 tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 56);
789 }
790 }
791
792 static void tgen_ext8u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
793 {
794 if (s390_facilities & FACILITY_EXT_IMM) {
795 tcg_out_insn(s, RRE, LLGCR, dest, src);
796 return;
797 }
798
799 if (dest == src) {
800 tcg_out_movi(s, type, TCG_TMP0, 0xff);
801 src = TCG_TMP0;
802 } else {
803 tcg_out_movi(s, type, dest, 0xff);
804 }
805 if (type == TCG_TYPE_I32) {
806 tcg_out_insn(s, RR, NR, dest, src);
807 } else {
808 tcg_out_insn(s, RRE, NGR, dest, src);
809 }
810 }
811
812 static void tgen_ext16s(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
813 {
814 if (s390_facilities & FACILITY_EXT_IMM) {
815 tcg_out_insn(s, RRE, LGHR, dest, src);
816 return;
817 }
818
819 if (type == TCG_TYPE_I32) {
820 if (dest == src) {
821 tcg_out_sh32(s, RS_SLL, dest, TCG_REG_NONE, 16);
822 } else {
823 tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 16);
824 }
825 tcg_out_sh32(s, RS_SRA, dest, TCG_REG_NONE, 16);
826 } else {
827 tcg_out_sh64(s, RSY_SLLG, dest, src, TCG_REG_NONE, 48);
828 tcg_out_sh64(s, RSY_SRAG, dest, dest, TCG_REG_NONE, 48);
829 }
830 }
831
832 static void tgen_ext16u(TCGContext *s, TCGType type, TCGReg dest, TCGReg src)
833 {
834 if (s390_facilities & FACILITY_EXT_IMM) {
835 tcg_out_insn(s, RRE, LLGHR, dest, src);
836 return;
837 }
838
839 if (dest == src) {
840 tcg_out_movi(s, type, TCG_TMP0, 0xffff);
841 src = TCG_TMP0;
842 } else {
843 tcg_out_movi(s, type, dest, 0xffff);
844 }
845 if (type == TCG_TYPE_I32) {
846 tcg_out_insn(s, RR, NR, dest, src);
847 } else {
848 tcg_out_insn(s, RRE, NGR, dest, src);
849 }
850 }
851
852 static inline void tgen_ext32s(TCGContext *s, TCGReg dest, TCGReg src)
853 {
854 tcg_out_insn(s, RRE, LGFR, dest, src);
855 }
856
857 static inline void tgen_ext32u(TCGContext *s, TCGReg dest, TCGReg src)
858 {
859 tcg_out_insn(s, RRE, LLGFR, dest, src);
860 }
861
862 /* Accept bit patterns like these:
863 0....01....1
864 1....10....0
865 1..10..01..1
866 0..01..10..0
867 Copied from gcc sources. */
868 static inline bool risbg_mask(uint64_t c)
869 {
870 uint64_t lsb;
871 /* We don't change the number of transitions by inverting,
872 so make sure we start with the LSB zero. */
873 if (c & 1) {
874 c = ~c;
875 }
876 /* Reject all zeros or all ones. */
877 if (c == 0) {
878 return false;
879 }
880 /* Find the first transition. */
881 lsb = c & -c;
882 /* Invert to look for a second transition. */
883 c = ~c;
884 /* Erase the first transition. */
885 c &= -lsb;
886 /* Find the second transition, if any. */
887 lsb = c & -c;
888 /* Match if all the bits are 1's, or if c is zero. */
889 return c == -lsb;
890 }
891
892 static void tgen_andi_risbg(TCGContext *s, TCGReg out, TCGReg in, uint64_t val)
893 {
894 int msb, lsb;
895 if ((val & 0x8000000000000001ull) == 0x8000000000000001ull) {
896 /* Achieve wraparound by swapping msb and lsb. */
897 msb = 64 - ctz64(~val);
898 lsb = clz64(~val) - 1;
899 } else {
900 msb = clz64(val);
901 lsb = 63 - ctz64(val);
902 }
903 tcg_out_risbg(s, out, in, msb, lsb, 0, 1);
904 }
905
906 static void tgen_andi(TCGContext *s, TCGType type, TCGReg dest, uint64_t val)
907 {
908 static const S390Opcode ni_insns[4] = {
909 RI_NILL, RI_NILH, RI_NIHL, RI_NIHH
910 };
911 static const S390Opcode nif_insns[2] = {
912 RIL_NILF, RIL_NIHF
913 };
914 uint64_t valid = (type == TCG_TYPE_I32 ? 0xffffffffull : -1ull);
915 int i;
916
917 /* Look for the zero-extensions. */
918 if ((val & valid) == 0xffffffff) {
919 tgen_ext32u(s, dest, dest);
920 return;
921 }
922 if (s390_facilities & FACILITY_EXT_IMM) {
923 if ((val & valid) == 0xff) {
924 tgen_ext8u(s, TCG_TYPE_I64, dest, dest);
925 return;
926 }
927 if ((val & valid) == 0xffff) {
928 tgen_ext16u(s, TCG_TYPE_I64, dest, dest);
929 return;
930 }
931 }
932
933 /* Try all 32-bit insns that can perform it in one go. */
934 for (i = 0; i < 4; i++) {
935 tcg_target_ulong mask = ~(0xffffull << i*16);
936 if (((val | ~valid) & mask) == mask) {
937 tcg_out_insn_RI(s, ni_insns[i], dest, val >> i*16);
938 return;
939 }
940 }
941
942 /* Try all 48-bit insns that can perform it in one go. */
943 if (s390_facilities & FACILITY_EXT_IMM) {
944 for (i = 0; i < 2; i++) {
945 tcg_target_ulong mask = ~(0xffffffffull << i*32);
946 if (((val | ~valid) & mask) == mask) {
947 tcg_out_insn_RIL(s, nif_insns[i], dest, val >> i*32);
948 return;
949 }
950 }
951 }
952 if ((s390_facilities & FACILITY_GEN_INST_EXT) && risbg_mask(val)) {
953 tgen_andi_risbg(s, dest, dest, val);
954 return;
955 }
956
957 /* Use the constant pool if USE_REG_TB, but not for small constants. */
958 if (USE_REG_TB) {
959 if (!maybe_out_small_movi(s, type, TCG_TMP0, val)) {
960 tcg_out_insn(s, RXY, NG, dest, TCG_REG_TB, TCG_REG_NONE, 0);
961 new_pool_label(s, val & valid, R_390_20, s->code_ptr - 2,
962 -(intptr_t)s->code_gen_ptr);
963 return;
964 }
965 } else {
966 tcg_out_movi(s, type, TCG_TMP0, val);
967 }
968 if (type == TCG_TYPE_I32) {
969 tcg_out_insn(s, RR, NR, dest, TCG_TMP0);
970 } else {
971 tcg_out_insn(s, RRE, NGR, dest, TCG_TMP0);
972 }
973 }
974
975 static void tgen_ori(TCGContext *s, TCGType type, TCGReg dest, uint64_t val)
976 {
977 static const S390Opcode oi_insns[4] = {
978 RI_OILL, RI_OILH, RI_OIHL, RI_OIHH
979 };
980 static const S390Opcode oif_insns[2] = {
981 RIL_OILF, RIL_OIHF
982 };
983
984 int i;
985
986 /* Look for no-op. */
987 if (unlikely(val == 0)) {
988 return;
989 }
990
991 /* Try all 32-bit insns that can perform it in one go. */
992 for (i = 0; i < 4; i++) {
993 tcg_target_ulong mask = (0xffffull << i*16);
994 if ((val & mask) != 0 && (val & ~mask) == 0) {
995 tcg_out_insn_RI(s, oi_insns[i], dest, val >> i*16);
996 return;
997 }
998 }
999
1000 /* Try all 48-bit insns that can perform it in one go. */
1001 if (s390_facilities & FACILITY_EXT_IMM) {
1002 for (i = 0; i < 2; i++) {
1003 tcg_target_ulong mask = (0xffffffffull << i*32);
1004 if ((val & mask) != 0 && (val & ~mask) == 0) {
1005 tcg_out_insn_RIL(s, oif_insns[i], dest, val >> i*32);
1006 return;
1007 }
1008 }
1009 }
1010
1011 /* Use the constant pool if USE_REG_TB, but not for small constants. */
1012 if (maybe_out_small_movi(s, type, TCG_TMP0, val)) {
1013 if (type == TCG_TYPE_I32) {
1014 tcg_out_insn(s, RR, OR, dest, TCG_TMP0);
1015 } else {
1016 tcg_out_insn(s, RRE, OGR, dest, TCG_TMP0);
1017 }
1018 } else if (USE_REG_TB) {
1019 tcg_out_insn(s, RXY, OG, dest, TCG_REG_TB, TCG_REG_NONE, 0);
1020 new_pool_label(s, val, R_390_20, s->code_ptr - 2,
1021 -(intptr_t)s->code_gen_ptr);
1022 } else {
1023 /* Perform the OR via sequential modifications to the high and
1024 low parts. Do this via recursion to handle 16-bit vs 32-bit
1025 masks in each half. */
1026 tcg_debug_assert(s390_facilities & FACILITY_EXT_IMM);
1027 tgen_ori(s, type, dest, val & 0x00000000ffffffffull);
1028 tgen_ori(s, type, dest, val & 0xffffffff00000000ull);
1029 }
1030 }
1031
1032 static void tgen_xori(TCGContext *s, TCGType type, TCGReg dest, uint64_t val)
1033 {
1034 /* Try all 48-bit insns that can perform it in one go. */
1035 if (s390_facilities & FACILITY_EXT_IMM) {
1036 if ((val & 0xffffffff00000000ull) == 0) {
1037 tcg_out_insn(s, RIL, XILF, dest, val);
1038 return;
1039 }
1040 if ((val & 0x00000000ffffffffull) == 0) {
1041 tcg_out_insn(s, RIL, XIHF, dest, val >> 32);
1042 return;
1043 }
1044 }
1045
1046 /* Use the constant pool if USE_REG_TB, but not for small constants. */
1047 if (maybe_out_small_movi(s, type, TCG_TMP0, val)) {
1048 if (type == TCG_TYPE_I32) {
1049 tcg_out_insn(s, RR, XR, dest, TCG_TMP0);
1050 } else {
1051 tcg_out_insn(s, RRE, XGR, dest, TCG_TMP0);
1052 }
1053 } else if (USE_REG_TB) {
1054 tcg_out_insn(s, RXY, XG, dest, TCG_REG_TB, TCG_REG_NONE, 0);
1055 new_pool_label(s, val, R_390_20, s->code_ptr - 2,
1056 -(intptr_t)s->code_gen_ptr);
1057 } else {
1058 /* Perform the xor by parts. */
1059 tcg_debug_assert(s390_facilities & FACILITY_EXT_IMM);
1060 if (val & 0xffffffff) {
1061 tcg_out_insn(s, RIL, XILF, dest, val);
1062 }
1063 if (val > 0xffffffff) {
1064 tcg_out_insn(s, RIL, XIHF, dest, val >> 32);
1065 }
1066 }
1067 }
1068
1069 static int tgen_cmp(TCGContext *s, TCGType type, TCGCond c, TCGReg r1,
1070 TCGArg c2, bool c2const, bool need_carry)
1071 {
1072 bool is_unsigned = is_unsigned_cond(c);
1073 S390Opcode op;
1074
1075 if (c2const) {
1076 if (c2 == 0) {
1077 if (!(is_unsigned && need_carry)) {
1078 if (type == TCG_TYPE_I32) {
1079 tcg_out_insn(s, RR, LTR, r1, r1);
1080 } else {
1081 tcg_out_insn(s, RRE, LTGR, r1, r1);
1082 }
1083 return tcg_cond_to_ltr_cond[c];
1084 }
1085 }
1086
1087 if (!is_unsigned && c2 == (int16_t)c2) {
1088 op = (type == TCG_TYPE_I32 ? RI_CHI : RI_CGHI);
1089 tcg_out_insn_RI(s, op, r1, c2);
1090 goto exit;
1091 }
1092
1093 if (s390_facilities & FACILITY_EXT_IMM) {
1094 if (type == TCG_TYPE_I32) {
1095 op = (is_unsigned ? RIL_CLFI : RIL_CFI);
1096 tcg_out_insn_RIL(s, op, r1, c2);
1097 goto exit;
1098 } else if (c2 == (is_unsigned ? (uint32_t)c2 : (int32_t)c2)) {
1099 op = (is_unsigned ? RIL_CLGFI : RIL_CGFI);
1100 tcg_out_insn_RIL(s, op, r1, c2);
1101 goto exit;
1102 }
1103 }
1104
1105 /* Use the constant pool, but not for small constants. */
1106 if (maybe_out_small_movi(s, type, TCG_TMP0, c2)) {
1107 c2 = TCG_TMP0;
1108 /* fall through to reg-reg */
1109 } else if (USE_REG_TB) {
1110 if (type == TCG_TYPE_I32) {
1111 op = (is_unsigned ? RXY_CLY : RXY_CY);
1112 tcg_out_insn_RXY(s, op, r1, TCG_REG_TB, TCG_REG_NONE, 0);
1113 new_pool_label(s, (uint32_t)c2, R_390_20, s->code_ptr - 2,
1114 4 - (intptr_t)s->code_gen_ptr);
1115 } else {
1116 op = (is_unsigned ? RXY_CLG : RXY_CG);
1117 tcg_out_insn_RXY(s, op, r1, TCG_REG_TB, TCG_REG_NONE, 0);
1118 new_pool_label(s, c2, R_390_20, s->code_ptr - 2,
1119 -(intptr_t)s->code_gen_ptr);
1120 }
1121 goto exit;
1122 } else {
1123 if (type == TCG_TYPE_I32) {
1124 op = (is_unsigned ? RIL_CLRL : RIL_CRL);
1125 tcg_out_insn_RIL(s, op, r1, 0);
1126 new_pool_label(s, (uint32_t)c2, R_390_PC32DBL,
1127 s->code_ptr - 2, 2 + 4);
1128 } else {
1129 op = (is_unsigned ? RIL_CLGRL : RIL_CGRL);
1130 tcg_out_insn_RIL(s, op, r1, 0);
1131 new_pool_label(s, c2, R_390_PC32DBL, s->code_ptr - 2, 2);
1132 }
1133 goto exit;
1134 }
1135 }
1136
1137 if (type == TCG_TYPE_I32) {
1138 op = (is_unsigned ? RR_CLR : RR_CR);
1139 tcg_out_insn_RR(s, op, r1, c2);
1140 } else {
1141 op = (is_unsigned ? RRE_CLGR : RRE_CGR);
1142 tcg_out_insn_RRE(s, op, r1, c2);
1143 }
1144
1145 exit:
1146 return tcg_cond_to_s390_cond[c];
1147 }
1148
1149 static void tgen_setcond(TCGContext *s, TCGType type, TCGCond cond,
1150 TCGReg dest, TCGReg c1, TCGArg c2, int c2const)
1151 {
1152 int cc;
1153 bool have_loc;
1154
1155 /* With LOC2, we can always emit the minimum 3 insns. */
1156 if (s390_facilities & FACILITY_LOAD_ON_COND2) {
1157 /* Emit: d = 0, d = (cc ? 1 : d). */
1158 cc = tgen_cmp(s, type, cond, c1, c2, c2const, false);
1159 tcg_out_movi(s, TCG_TYPE_I64, dest, 0);
1160 tcg_out_insn(s, RIE, LOCGHI, dest, 1, cc);
1161 return;
1162 }
1163
1164 have_loc = (s390_facilities & FACILITY_LOAD_ON_COND) != 0;
1165
1166 /* For HAVE_LOC, only the paths through GTU/GT/LEU/LE are smaller. */
1167 restart:
1168 switch (cond) {
1169 case TCG_COND_NE:
1170 /* X != 0 is X > 0. */
1171 if (c2const && c2 == 0) {
1172 cond = TCG_COND_GTU;
1173 } else {
1174 break;
1175 }
1176 /* fallthru */
1177
1178 case TCG_COND_GTU:
1179 case TCG_COND_GT:
1180 /* The result of a compare has CC=2 for GT and CC=3 unused.
1181 ADD LOGICAL WITH CARRY considers (CC & 2) the carry bit. */
1182 tgen_cmp(s, type, cond, c1, c2, c2const, true);
1183 tcg_out_movi(s, type, dest, 0);
1184 tcg_out_insn(s, RRE, ALCGR, dest, dest);
1185 return;
1186
1187 case TCG_COND_EQ:
1188 /* X == 0 is X <= 0. */
1189 if (c2const && c2 == 0) {
1190 cond = TCG_COND_LEU;
1191 } else {
1192 break;
1193 }
1194 /* fallthru */
1195
1196 case TCG_COND_LEU:
1197 case TCG_COND_LE:
1198 /* As above, but we're looking for borrow, or !carry.
1199 The second insn computes d - d - borrow, or -1 for true
1200 and 0 for false. So we must mask to 1 bit afterward. */
1201 tgen_cmp(s, type, cond, c1, c2, c2const, true);
1202 tcg_out_insn(s, RRE, SLBGR, dest, dest);
1203 tgen_andi(s, type, dest, 1);
1204 return;
1205
1206 case TCG_COND_GEU:
1207 case TCG_COND_LTU:
1208 case TCG_COND_LT:
1209 case TCG_COND_GE:
1210 /* Swap operands so that we can use LEU/GTU/GT/LE. */
1211 if (c2const) {
1212 if (have_loc) {
1213 break;
1214 }
1215 tcg_out_movi(s, type, TCG_TMP0, c2);
1216 c2 = c1;
1217 c2const = 0;
1218 c1 = TCG_TMP0;
1219 } else {
1220 TCGReg t = c1;
1221 c1 = c2;
1222 c2 = t;
1223 }
1224 cond = tcg_swap_cond(cond);
1225 goto restart;
1226
1227 default:
1228 g_assert_not_reached();
1229 }
1230
1231 cc = tgen_cmp(s, type, cond, c1, c2, c2const, false);
1232 if (have_loc) {
1233 /* Emit: d = 0, t = 1, d = (cc ? t : d). */
1234 tcg_out_movi(s, TCG_TYPE_I64, dest, 0);
1235 tcg_out_movi(s, TCG_TYPE_I64, TCG_TMP0, 1);
1236 tcg_out_insn(s, RRF, LOCGR, dest, TCG_TMP0, cc);
1237 } else {
1238 /* Emit: d = 1; if (cc) goto over; d = 0; over: */
1239 tcg_out_movi(s, type, dest, 1);
1240 tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1);
1241 tcg_out_movi(s, type, dest, 0);
1242 }
1243 }
1244
1245 static void tgen_movcond(TCGContext *s, TCGType type, TCGCond c, TCGReg dest,
1246 TCGReg c1, TCGArg c2, int c2const,
1247 TCGArg v3, int v3const)
1248 {
1249 int cc;
1250 if (s390_facilities & FACILITY_LOAD_ON_COND) {
1251 cc = tgen_cmp(s, type, c, c1, c2, c2const, false);
1252 if (v3const) {
1253 tcg_out_insn(s, RIE, LOCGHI, dest, v3, cc);
1254 } else {
1255 tcg_out_insn(s, RRF, LOCGR, dest, v3, cc);
1256 }
1257 } else {
1258 c = tcg_invert_cond(c);
1259 cc = tgen_cmp(s, type, c, c1, c2, c2const, false);
1260
1261 /* Emit: if (cc) goto over; dest = r3; over: */
1262 tcg_out_insn(s, RI, BRC, cc, (4 + 4) >> 1);
1263 tcg_out_insn(s, RRE, LGR, dest, v3);
1264 }
1265 }
1266
1267 static void tgen_clz(TCGContext *s, TCGReg dest, TCGReg a1,
1268 TCGArg a2, int a2const)
1269 {
1270 /* Since this sets both R and R+1, we have no choice but to store the
1271 result into R0, allowing R1 == TCG_TMP0 to be clobbered as well. */
1272 QEMU_BUILD_BUG_ON(TCG_TMP0 != TCG_REG_R1);
1273 tcg_out_insn(s, RRE, FLOGR, TCG_REG_R0, a1);
1274
1275 if (a2const && a2 == 64) {
1276 tcg_out_mov(s, TCG_TYPE_I64, dest, TCG_REG_R0);
1277 } else {
1278 if (a2const) {
1279 tcg_out_movi(s, TCG_TYPE_I64, dest, a2);
1280 } else {
1281 tcg_out_mov(s, TCG_TYPE_I64, dest, a2);
1282 }
1283 if (s390_facilities & FACILITY_LOAD_ON_COND) {
1284 /* Emit: if (one bit found) dest = r0. */
1285 tcg_out_insn(s, RRF, LOCGR, dest, TCG_REG_R0, 2);
1286 } else {
1287 /* Emit: if (no one bit found) goto over; dest = r0; over: */
1288 tcg_out_insn(s, RI, BRC, 8, (4 + 4) >> 1);
1289 tcg_out_insn(s, RRE, LGR, dest, TCG_REG_R0);
1290 }
1291 }
1292 }
1293
1294 static void tgen_deposit(TCGContext *s, TCGReg dest, TCGReg src,
1295 int ofs, int len, int z)
1296 {
1297 int lsb = (63 - ofs);
1298 int msb = lsb - (len - 1);
1299 tcg_out_risbg(s, dest, src, msb, lsb, ofs, z);
1300 }
1301
1302 static void tgen_extract(TCGContext *s, TCGReg dest, TCGReg src,
1303 int ofs, int len)
1304 {
1305 tcg_out_risbg(s, dest, src, 64 - len, 63, 64 - ofs, 1);
1306 }
1307
1308 static void tgen_gotoi(TCGContext *s, int cc, tcg_insn_unit *dest)
1309 {
1310 ptrdiff_t off = dest - s->code_ptr;
1311 if (off == (int16_t)off) {
1312 tcg_out_insn(s, RI, BRC, cc, off);
1313 } else if (off == (int32_t)off) {
1314 tcg_out_insn(s, RIL, BRCL, cc, off);
1315 } else {
1316 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest);
1317 tcg_out_insn(s, RR, BCR, cc, TCG_TMP0);
1318 }
1319 }
1320
1321 static void tgen_branch(TCGContext *s, int cc, TCGLabel *l)
1322 {
1323 if (l->has_value) {
1324 tgen_gotoi(s, cc, l->u.value_ptr);
1325 } else if (USE_LONG_BRANCHES) {
1326 tcg_out16(s, RIL_BRCL | (cc << 4));
1327 tcg_out_reloc(s, s->code_ptr, R_390_PC32DBL, l, 2);
1328 s->code_ptr += 2;
1329 } else {
1330 tcg_out16(s, RI_BRC | (cc << 4));
1331 tcg_out_reloc(s, s->code_ptr, R_390_PC16DBL, l, 2);
1332 s->code_ptr += 1;
1333 }
1334 }
1335
1336 static void tgen_compare_branch(TCGContext *s, S390Opcode opc, int cc,
1337 TCGReg r1, TCGReg r2, TCGLabel *l)
1338 {
1339 intptr_t off = 0;
1340
1341 if (l->has_value) {
1342 off = l->u.value_ptr - s->code_ptr;
1343 tcg_debug_assert(off == (int16_t)off);
1344 } else {
1345 tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, 2);
1346 }
1347
1348 tcg_out16(s, (opc & 0xff00) | (r1 << 4) | r2);
1349 tcg_out16(s, off);
1350 tcg_out16(s, cc << 12 | (opc & 0xff));
1351 }
1352
1353 static void tgen_compare_imm_branch(TCGContext *s, S390Opcode opc, int cc,
1354 TCGReg r1, int i2, TCGLabel *l)
1355 {
1356 tcg_target_long off = 0;
1357
1358 if (l->has_value) {
1359 off = l->u.value_ptr - s->code_ptr;
1360 tcg_debug_assert(off == (int16_t)off);
1361 } else {
1362 tcg_out_reloc(s, s->code_ptr + 1, R_390_PC16DBL, l, 2);
1363 }
1364
1365 tcg_out16(s, (opc & 0xff00) | (r1 << 4) | cc);
1366 tcg_out16(s, off);
1367 tcg_out16(s, (i2 << 8) | (opc & 0xff));
1368 }
1369
1370 static void tgen_brcond(TCGContext *s, TCGType type, TCGCond c,
1371 TCGReg r1, TCGArg c2, int c2const, TCGLabel *l)
1372 {
1373 int cc;
1374
1375 if (s390_facilities & FACILITY_GEN_INST_EXT) {
1376 bool is_unsigned = is_unsigned_cond(c);
1377 bool in_range;
1378 S390Opcode opc;
1379
1380 cc = tcg_cond_to_s390_cond[c];
1381
1382 if (!c2const) {
1383 opc = (type == TCG_TYPE_I32
1384 ? (is_unsigned ? RIE_CLRJ : RIE_CRJ)
1385 : (is_unsigned ? RIE_CLGRJ : RIE_CGRJ));
1386 tgen_compare_branch(s, opc, cc, r1, c2, l);
1387 return;
1388 }
1389
1390 /* COMPARE IMMEDIATE AND BRANCH RELATIVE has an 8-bit immediate field.
1391 If the immediate we've been given does not fit that range, we'll
1392 fall back to separate compare and branch instructions using the
1393 larger comparison range afforded by COMPARE IMMEDIATE. */
1394 if (type == TCG_TYPE_I32) {
1395 if (is_unsigned) {
1396 opc = RIE_CLIJ;
1397 in_range = (uint32_t)c2 == (uint8_t)c2;
1398 } else {
1399 opc = RIE_CIJ;
1400 in_range = (int32_t)c2 == (int8_t)c2;
1401 }
1402 } else {
1403 if (is_unsigned) {
1404 opc = RIE_CLGIJ;
1405 in_range = (uint64_t)c2 == (uint8_t)c2;
1406 } else {
1407 opc = RIE_CGIJ;
1408 in_range = (int64_t)c2 == (int8_t)c2;
1409 }
1410 }
1411 if (in_range) {
1412 tgen_compare_imm_branch(s, opc, cc, r1, c2, l);
1413 return;
1414 }
1415 }
1416
1417 cc = tgen_cmp(s, type, c, r1, c2, c2const, false);
1418 tgen_branch(s, cc, l);
1419 }
1420
1421 static void tcg_out_call(TCGContext *s, tcg_insn_unit *dest)
1422 {
1423 ptrdiff_t off = dest - s->code_ptr;
1424 if (off == (int32_t)off) {
1425 tcg_out_insn(s, RIL, BRASL, TCG_REG_R14, off);
1426 } else {
1427 tcg_out_movi(s, TCG_TYPE_PTR, TCG_TMP0, (uintptr_t)dest);
1428 tcg_out_insn(s, RR, BASR, TCG_REG_R14, TCG_TMP0);
1429 }
1430 }
1431
1432 static void tcg_out_qemu_ld_direct(TCGContext *s, TCGMemOp opc, TCGReg data,
1433 TCGReg base, TCGReg index, int disp)
1434 {
1435 switch (opc & (MO_SSIZE | MO_BSWAP)) {
1436 case MO_UB:
1437 tcg_out_insn(s, RXY, LLGC, data, base, index, disp);
1438 break;
1439 case MO_SB:
1440 tcg_out_insn(s, RXY, LGB, data, base, index, disp);
1441 break;
1442
1443 case MO_UW | MO_BSWAP:
1444 /* swapped unsigned halfword load with upper bits zeroed */
1445 tcg_out_insn(s, RXY, LRVH, data, base, index, disp);
1446 tgen_ext16u(s, TCG_TYPE_I64, data, data);
1447 break;
1448 case MO_UW:
1449 tcg_out_insn(s, RXY, LLGH, data, base, index, disp);
1450 break;
1451
1452 case MO_SW | MO_BSWAP:
1453 /* swapped sign-extended halfword load */
1454 tcg_out_insn(s, RXY, LRVH, data, base, index, disp);
1455 tgen_ext16s(s, TCG_TYPE_I64, data, data);
1456 break;
1457 case MO_SW:
1458 tcg_out_insn(s, RXY, LGH, data, base, index, disp);
1459 break;
1460
1461 case MO_UL | MO_BSWAP:
1462 /* swapped unsigned int load with upper bits zeroed */
1463 tcg_out_insn(s, RXY, LRV, data, base, index, disp);
1464 tgen_ext32u(s, data, data);
1465 break;
1466 case MO_UL:
1467 tcg_out_insn(s, RXY, LLGF, data, base, index, disp);
1468 break;
1469
1470 case MO_SL | MO_BSWAP:
1471 /* swapped sign-extended int load */
1472 tcg_out_insn(s, RXY, LRV, data, base, index, disp);
1473 tgen_ext32s(s, data, data);
1474 break;
1475 case MO_SL:
1476 tcg_out_insn(s, RXY, LGF, data, base, index, disp);
1477 break;
1478
1479 case MO_Q | MO_BSWAP:
1480 tcg_out_insn(s, RXY, LRVG, data, base, index, disp);
1481 break;
1482 case MO_Q:
1483 tcg_out_insn(s, RXY, LG, data, base, index, disp);
1484 break;
1485
1486 default:
1487 tcg_abort();
1488 }
1489 }
1490
1491 static void tcg_out_qemu_st_direct(TCGContext *s, TCGMemOp opc, TCGReg data,
1492 TCGReg base, TCGReg index, int disp)
1493 {
1494 switch (opc & (MO_SIZE | MO_BSWAP)) {
1495 case MO_UB:
1496 if (disp >= 0 && disp < 0x1000) {
1497 tcg_out_insn(s, RX, STC, data, base, index, disp);
1498 } else {
1499 tcg_out_insn(s, RXY, STCY, data, base, index, disp);
1500 }
1501 break;
1502
1503 case MO_UW | MO_BSWAP:
1504 tcg_out_insn(s, RXY, STRVH, data, base, index, disp);
1505 break;
1506 case MO_UW:
1507 if (disp >= 0 && disp < 0x1000) {
1508 tcg_out_insn(s, RX, STH, data, base, index, disp);
1509 } else {
1510 tcg_out_insn(s, RXY, STHY, data, base, index, disp);
1511 }
1512 break;
1513
1514 case MO_UL | MO_BSWAP:
1515 tcg_out_insn(s, RXY, STRV, data, base, index, disp);
1516 break;
1517 case MO_UL:
1518 if (disp >= 0 && disp < 0x1000) {
1519 tcg_out_insn(s, RX, ST, data, base, index, disp);
1520 } else {
1521 tcg_out_insn(s, RXY, STY, data, base, index, disp);
1522 }
1523 break;
1524
1525 case MO_Q | MO_BSWAP:
1526 tcg_out_insn(s, RXY, STRVG, data, base, index, disp);
1527 break;
1528 case MO_Q:
1529 tcg_out_insn(s, RXY, STG, data, base, index, disp);
1530 break;
1531
1532 default:
1533 tcg_abort();
1534 }
1535 }
1536
1537 #if defined(CONFIG_SOFTMMU)
1538 #include "tcg-ldst.inc.c"
1539
1540 /* We're expecting to use a 20-bit signed offset on the tlb memory ops. */
1541 QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_mask[NB_MMU_MODES - 1])
1542 > 0x7ffff);
1543 QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_table[NB_MMU_MODES - 1])
1544 > 0x7ffff);
1545
1546 /* Load and compare a TLB entry, leaving the flags set. Loads the TLB
1547 addend into R2. Returns a register with the santitized guest address. */
1548 static TCGReg tcg_out_tlb_read(TCGContext* s, TCGReg addr_reg, TCGMemOp opc,
1549 int mem_index, bool is_ld)
1550 {
1551 unsigned s_bits = opc & MO_SIZE;
1552 unsigned a_bits = get_alignment_bits(opc);
1553 unsigned s_mask = (1 << s_bits) - 1;
1554 unsigned a_mask = (1 << a_bits) - 1;
1555 int mask_off = offsetof(CPUArchState, tlb_mask[mem_index]);
1556 int table_off = offsetof(CPUArchState, tlb_table[mem_index]);
1557 int ofs, a_off;
1558 uint64_t tlb_mask;
1559
1560 tcg_out_sh64(s, RSY_SRLG, TCG_REG_R2, addr_reg, TCG_REG_NONE,
1561 TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
1562 tcg_out_insn(s, RXY, NG, TCG_REG_R2, TCG_AREG0, TCG_REG_NONE, mask_off);
1563 tcg_out_insn(s, RXY, AG, TCG_REG_R2, TCG_AREG0, TCG_REG_NONE, table_off);
1564
1565 /* For aligned accesses, we check the first byte and include the alignment
1566 bits within the address. For unaligned access, we check that we don't
1567 cross pages using the address of the last byte of the access. */
1568 a_off = (a_bits >= s_bits ? 0 : s_mask - a_mask);
1569 tlb_mask = (uint64_t)TARGET_PAGE_MASK | a_mask;
1570 if ((s390_facilities & FACILITY_GEN_INST_EXT) && a_off == 0) {
1571 tgen_andi_risbg(s, TCG_REG_R3, addr_reg, tlb_mask);
1572 } else {
1573 tcg_out_insn(s, RX, LA, TCG_REG_R3, addr_reg, TCG_REG_NONE, a_off);
1574 tgen_andi(s, TCG_TYPE_TL, TCG_REG_R3, tlb_mask);
1575 }
1576
1577 if (is_ld) {
1578 ofs = offsetof(CPUTLBEntry, addr_read);
1579 } else {
1580 ofs = offsetof(CPUTLBEntry, addr_write);
1581 }
1582 if (TARGET_LONG_BITS == 32) {
1583 tcg_out_insn(s, RX, C, TCG_REG_R3, TCG_REG_R2, TCG_REG_NONE, ofs);
1584 } else {
1585 tcg_out_insn(s, RXY, CG, TCG_REG_R3, TCG_REG_R2, TCG_REG_NONE, ofs);
1586 }
1587
1588 tcg_out_insn(s, RXY, LG, TCG_REG_R2, TCG_REG_R2, TCG_REG_NONE,
1589 offsetof(CPUTLBEntry, addend));
1590
1591 if (TARGET_LONG_BITS == 32) {
1592 tgen_ext32u(s, TCG_REG_R3, addr_reg);
1593 return TCG_REG_R3;
1594 }
1595 return addr_reg;
1596 }
1597
1598 static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi,
1599 TCGReg data, TCGReg addr,
1600 tcg_insn_unit *raddr, tcg_insn_unit *label_ptr)
1601 {
1602 TCGLabelQemuLdst *label = new_ldst_label(s);
1603
1604 label->is_ld = is_ld;
1605 label->oi = oi;
1606 label->datalo_reg = data;
1607 label->addrlo_reg = addr;
1608 label->raddr = raddr;
1609 label->label_ptr[0] = label_ptr;
1610 }
1611
1612 static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
1613 {
1614 TCGReg addr_reg = lb->addrlo_reg;
1615 TCGReg data_reg = lb->datalo_reg;
1616 TCGMemOpIdx oi = lb->oi;
1617 TCGMemOp opc = get_memop(oi);
1618
1619 bool ok = patch_reloc(lb->label_ptr[0], R_390_PC16DBL,
1620 (intptr_t)s->code_ptr, 2);
1621 tcg_debug_assert(ok);
1622
1623 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0);
1624 if (TARGET_LONG_BITS == 64) {
1625 tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg);
1626 }
1627 tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R4, oi);
1628 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R5, (uintptr_t)lb->raddr);
1629 tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]);
1630 tcg_out_mov(s, TCG_TYPE_I64, data_reg, TCG_REG_R2);
1631
1632 tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr);
1633 }
1634
1635 static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
1636 {
1637 TCGReg addr_reg = lb->addrlo_reg;
1638 TCGReg data_reg = lb->datalo_reg;
1639 TCGMemOpIdx oi = lb->oi;
1640 TCGMemOp opc = get_memop(oi);
1641
1642 bool ok = patch_reloc(lb->label_ptr[0], R_390_PC16DBL,
1643 (intptr_t)s->code_ptr, 2);
1644 tcg_debug_assert(ok);
1645
1646 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R2, TCG_AREG0);
1647 if (TARGET_LONG_BITS == 64) {
1648 tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R3, addr_reg);
1649 }
1650 switch (opc & MO_SIZE) {
1651 case MO_UB:
1652 tgen_ext8u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg);
1653 break;
1654 case MO_UW:
1655 tgen_ext16u(s, TCG_TYPE_I64, TCG_REG_R4, data_reg);
1656 break;
1657 case MO_UL:
1658 tgen_ext32u(s, TCG_REG_R4, data_reg);
1659 break;
1660 case MO_Q:
1661 tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_R4, data_reg);
1662 break;
1663 default:
1664 tcg_abort();
1665 }
1666 tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R5, oi);
1667 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R6, (uintptr_t)lb->raddr);
1668 tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
1669
1670 tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr);
1671 }
1672 #else
1673 static void tcg_prepare_user_ldst(TCGContext *s, TCGReg *addr_reg,
1674 TCGReg *index_reg, tcg_target_long *disp)
1675 {
1676 if (TARGET_LONG_BITS == 32) {
1677 tgen_ext32u(s, TCG_TMP0, *addr_reg);
1678 *addr_reg = TCG_TMP0;
1679 }
1680 if (guest_base < 0x80000) {
1681 *index_reg = TCG_REG_NONE;
1682 *disp = guest_base;
1683 } else {
1684 *index_reg = TCG_GUEST_BASE_REG;
1685 *disp = 0;
1686 }
1687 }
1688 #endif /* CONFIG_SOFTMMU */
1689
1690 static void tcg_out_qemu_ld(TCGContext* s, TCGReg data_reg, TCGReg addr_reg,
1691 TCGMemOpIdx oi)
1692 {
1693 TCGMemOp opc = get_memop(oi);
1694 #ifdef CONFIG_SOFTMMU
1695 unsigned mem_index = get_mmuidx(oi);
1696 tcg_insn_unit *label_ptr;
1697 TCGReg base_reg;
1698
1699 base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 1);
1700
1701 tcg_out16(s, RI_BRC | (S390_CC_NE << 4));
1702 label_ptr = s->code_ptr;
1703 s->code_ptr += 1;
1704
1705 tcg_out_qemu_ld_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0);
1706
1707 add_qemu_ldst_label(s, 1, oi, data_reg, addr_reg, s->code_ptr, label_ptr);
1708 #else
1709 TCGReg index_reg;
1710 tcg_target_long disp;
1711
1712 tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp);
1713 tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg, index_reg, disp);
1714 #endif
1715 }
1716
1717 static void tcg_out_qemu_st(TCGContext* s, TCGReg data_reg, TCGReg addr_reg,
1718 TCGMemOpIdx oi)
1719 {
1720 TCGMemOp opc = get_memop(oi);
1721 #ifdef CONFIG_SOFTMMU
1722 unsigned mem_index = get_mmuidx(oi);
1723 tcg_insn_unit *label_ptr;
1724 TCGReg base_reg;
1725
1726 base_reg = tcg_out_tlb_read(s, addr_reg, opc, mem_index, 0);
1727
1728 tcg_out16(s, RI_BRC | (S390_CC_NE << 4));
1729 label_ptr = s->code_ptr;
1730 s->code_ptr += 1;
1731
1732 tcg_out_qemu_st_direct(s, opc, data_reg, base_reg, TCG_REG_R2, 0);
1733
1734 add_qemu_ldst_label(s, 0, oi, data_reg, addr_reg, s->code_ptr, label_ptr);
1735 #else
1736 TCGReg index_reg;
1737 tcg_target_long disp;
1738
1739 tcg_prepare_user_ldst(s, &addr_reg, &index_reg, &disp);
1740 tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg, index_reg, disp);
1741 #endif
1742 }
1743
1744 # define OP_32_64(x) \
1745 case glue(glue(INDEX_op_,x),_i32): \
1746 case glue(glue(INDEX_op_,x),_i64)
1747
1748 static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
1749 const TCGArg *args, const int *const_args)
1750 {
1751 S390Opcode op, op2;
1752 TCGArg a0, a1, a2;
1753
1754 switch (opc) {
1755 case INDEX_op_exit_tb:
1756 /* Reuse the zeroing that exists for goto_ptr. */
1757 a0 = args[0];
1758 if (a0 == 0) {
1759 tgen_gotoi(s, S390_CC_ALWAYS, s->code_gen_epilogue);
1760 } else {
1761 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, a0);
1762 tgen_gotoi(s, S390_CC_ALWAYS, tb_ret_addr);
1763 }
1764 break;
1765
1766 case INDEX_op_goto_tb:
1767 a0 = args[0];
1768 if (s->tb_jmp_insn_offset) {
1769 /* branch displacement must be aligned for atomic patching;
1770 * see if we need to add extra nop before branch
1771 */
1772 if (!QEMU_PTR_IS_ALIGNED(s->code_ptr + 1, 4)) {
1773 tcg_out16(s, NOP);
1774 }
1775 tcg_debug_assert(!USE_REG_TB);
1776 tcg_out16(s, RIL_BRCL | (S390_CC_ALWAYS << 4));
1777 s->tb_jmp_insn_offset[a0] = tcg_current_code_size(s);
1778 s->code_ptr += 2;
1779 } else {
1780 /* load address stored at s->tb_jmp_target_addr + a0 */
1781 tcg_out_ld_abs(s, TCG_TYPE_PTR, TCG_REG_TB,
1782 s->tb_jmp_target_addr + a0);
1783 /* and go there */
1784 tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_TB);
1785 }
1786 set_jmp_reset_offset(s, a0);
1787
1788 /* For the unlinked path of goto_tb, we need to reset
1789 TCG_REG_TB to the beginning of this TB. */
1790 if (USE_REG_TB) {
1791 int ofs = -tcg_current_code_size(s);
1792 assert(ofs == (int16_t)ofs);
1793 tcg_out_insn(s, RI, AGHI, TCG_REG_TB, ofs);
1794 }
1795 break;
1796
1797 case INDEX_op_goto_ptr:
1798 a0 = args[0];
1799 if (USE_REG_TB) {
1800 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_TB, a0);
1801 }
1802 tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, a0);
1803 break;
1804
1805 OP_32_64(ld8u):
1806 /* ??? LLC (RXY format) is only present with the extended-immediate
1807 facility, whereas LLGC is always present. */
1808 tcg_out_mem(s, 0, RXY_LLGC, args[0], args[1], TCG_REG_NONE, args[2]);
1809 break;
1810
1811 OP_32_64(ld8s):
1812 /* ??? LB is no smaller than LGB, so no point to using it. */
1813 tcg_out_mem(s, 0, RXY_LGB, args[0], args[1], TCG_REG_NONE, args[2]);
1814 break;
1815
1816 OP_32_64(ld16u):
1817 /* ??? LLH (RXY format) is only present with the extended-immediate
1818 facility, whereas LLGH is always present. */
1819 tcg_out_mem(s, 0, RXY_LLGH, args[0], args[1], TCG_REG_NONE, args[2]);
1820 break;
1821
1822 case INDEX_op_ld16s_i32:
1823 tcg_out_mem(s, RX_LH, RXY_LHY, args[0], args[1], TCG_REG_NONE, args[2]);
1824 break;
1825
1826 case INDEX_op_ld_i32:
1827 tcg_out_ld(s, TCG_TYPE_I32, args[0], args[1], args[2]);
1828 break;
1829
1830 OP_32_64(st8):
1831 tcg_out_mem(s, RX_STC, RXY_STCY, args[0], args[1],
1832 TCG_REG_NONE, args[2]);
1833 break;
1834
1835 OP_32_64(st16):
1836 tcg_out_mem(s, RX_STH, RXY_STHY, args[0], args[1],
1837 TCG_REG_NONE, args[2]);
1838 break;
1839
1840 case INDEX_op_st_i32:
1841 tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]);
1842 break;
1843
1844 case INDEX_op_add_i32:
1845 a0 = args[0], a1 = args[1], a2 = (int32_t)args[2];
1846 if (const_args[2]) {
1847 do_addi_32:
1848 if (a0 == a1) {
1849 if (a2 == (int16_t)a2) {
1850 tcg_out_insn(s, RI, AHI, a0, a2);
1851 break;
1852 }
1853 if (s390_facilities & FACILITY_EXT_IMM) {
1854 tcg_out_insn(s, RIL, AFI, a0, a2);
1855 break;
1856 }
1857 }
1858 tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2);
1859 } else if (a0 == a1) {
1860 tcg_out_insn(s, RR, AR, a0, a2);
1861 } else {
1862 tcg_out_insn(s, RX, LA, a0, a1, a2, 0);
1863 }
1864 break;
1865 case INDEX_op_sub_i32:
1866 a0 = args[0], a1 = args[1], a2 = (int32_t)args[2];
1867 if (const_args[2]) {
1868 a2 = -a2;
1869 goto do_addi_32;
1870 } else if (a0 == a1) {
1871 tcg_out_insn(s, RR, SR, a0, a2);
1872 } else {
1873 tcg_out_insn(s, RRF, SRK, a0, a1, a2);
1874 }
1875 break;
1876
1877 case INDEX_op_and_i32:
1878 a0 = args[0], a1 = args[1], a2 = (uint32_t)args[2];
1879 if (const_args[2]) {
1880 tcg_out_mov(s, TCG_TYPE_I32, a0, a1);
1881 tgen_andi(s, TCG_TYPE_I32, a0, a2);
1882 } else if (a0 == a1) {
1883 tcg_out_insn(s, RR, NR, a0, a2);
1884 } else {
1885 tcg_out_insn(s, RRF, NRK, a0, a1, a2);
1886 }
1887 break;
1888 case INDEX_op_or_i32:
1889 a0 = args[0], a1 = args[1], a2 = (uint32_t)args[2];
1890 if (const_args[2]) {
1891 tcg_out_mov(s, TCG_TYPE_I32, a0, a1);
1892 tgen_ori(s, TCG_TYPE_I32, a0, a2);
1893 } else if (a0 == a1) {
1894 tcg_out_insn(s, RR, OR, a0, a2);
1895 } else {
1896 tcg_out_insn(s, RRF, ORK, a0, a1, a2);
1897 }
1898 break;
1899 case INDEX_op_xor_i32:
1900 a0 = args[0], a1 = args[1], a2 = (uint32_t)args[2];
1901 if (const_args[2]) {
1902 tcg_out_mov(s, TCG_TYPE_I32, a0, a1);
1903 tgen_xori(s, TCG_TYPE_I32, a0, a2);
1904 } else if (a0 == a1) {
1905 tcg_out_insn(s, RR, XR, args[0], args[2]);
1906 } else {
1907 tcg_out_insn(s, RRF, XRK, a0, a1, a2);
1908 }
1909 break;
1910
1911 case INDEX_op_neg_i32:
1912 tcg_out_insn(s, RR, LCR, args[0], args[1]);
1913 break;
1914
1915 case INDEX_op_mul_i32:
1916 if (const_args[2]) {
1917 if ((int32_t)args[2] == (int16_t)args[2]) {
1918 tcg_out_insn(s, RI, MHI, args[0], args[2]);
1919 } else {
1920 tcg_out_insn(s, RIL, MSFI, args[0], args[2]);
1921 }
1922 } else {
1923 tcg_out_insn(s, RRE, MSR, args[0], args[2]);
1924 }
1925 break;
1926
1927 case INDEX_op_div2_i32:
1928 tcg_out_insn(s, RR, DR, TCG_REG_R2, args[4]);
1929 break;
1930 case INDEX_op_divu2_i32:
1931 tcg_out_insn(s, RRE, DLR, TCG_REG_R2, args[4]);
1932 break;
1933
1934 case INDEX_op_shl_i32:
1935 op = RS_SLL;
1936 op2 = RSY_SLLK;
1937 do_shift32:
1938 a0 = args[0], a1 = args[1], a2 = (int32_t)args[2];
1939 if (a0 == a1) {
1940 if (const_args[2]) {
1941 tcg_out_sh32(s, op, a0, TCG_REG_NONE, a2);
1942 } else {
1943 tcg_out_sh32(s, op, a0, a2, 0);
1944 }
1945 } else {
1946 /* Using tcg_out_sh64 here for the format; it is a 32-bit shift. */
1947 if (const_args[2]) {
1948 tcg_out_sh64(s, op2, a0, a1, TCG_REG_NONE, a2);
1949 } else {
1950 tcg_out_sh64(s, op2, a0, a1, a2, 0);
1951 }
1952 }
1953 break;
1954 case INDEX_op_shr_i32:
1955 op = RS_SRL;
1956 op2 = RSY_SRLK;
1957 goto do_shift32;
1958 case INDEX_op_sar_i32:
1959 op = RS_SRA;
1960 op2 = RSY_SRAK;
1961 goto do_shift32;
1962
1963 case INDEX_op_rotl_i32:
1964 /* ??? Using tcg_out_sh64 here for the format; it is a 32-bit rol. */
1965 if (const_args[2]) {
1966 tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_REG_NONE, args[2]);
1967 } else {
1968 tcg_out_sh64(s, RSY_RLL, args[0], args[1], args[2], 0);
1969 }
1970 break;
1971 case INDEX_op_rotr_i32:
1972 if (const_args[2]) {
1973 tcg_out_sh64(s, RSY_RLL, args[0], args[1],
1974 TCG_REG_NONE, (32 - args[2]) & 31);
1975 } else {
1976 tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]);
1977 tcg_out_sh64(s, RSY_RLL, args[0], args[1], TCG_TMP0, 0);
1978 }
1979 break;
1980
1981 case INDEX_op_ext8s_i32:
1982 tgen_ext8s(s, TCG_TYPE_I32, args[0], args[1]);
1983 break;
1984 case INDEX_op_ext16s_i32:
1985 tgen_ext16s(s, TCG_TYPE_I32, args[0], args[1]);
1986 break;
1987 case INDEX_op_ext8u_i32:
1988 tgen_ext8u(s, TCG_TYPE_I32, args[0], args[1]);
1989 break;
1990 case INDEX_op_ext16u_i32:
1991 tgen_ext16u(s, TCG_TYPE_I32, args[0], args[1]);
1992 break;
1993
1994 OP_32_64(bswap16):
1995 /* The TCG bswap definition requires bits 0-47 already be zero.
1996 Thus we don't need the G-type insns to implement bswap16_i64. */
1997 tcg_out_insn(s, RRE, LRVR, args[0], args[1]);
1998 tcg_out_sh32(s, RS_SRL, args[0], TCG_REG_NONE, 16);
1999 break;
2000 OP_32_64(bswap32):
2001 tcg_out_insn(s, RRE, LRVR, args[0], args[1]);
2002 break;
2003
2004 case INDEX_op_add2_i32:
2005 if (const_args[4]) {
2006 tcg_out_insn(s, RIL, ALFI, args[0], args[4]);
2007 } else {
2008 tcg_out_insn(s, RR, ALR, args[0], args[4]);
2009 }
2010 tcg_out_insn(s, RRE, ALCR, args[1], args[5]);
2011 break;
2012 case INDEX_op_sub2_i32:
2013 if (const_args[4]) {
2014 tcg_out_insn(s, RIL, SLFI, args[0], args[4]);
2015 } else {
2016 tcg_out_insn(s, RR, SLR, args[0], args[4]);
2017 }
2018 tcg_out_insn(s, RRE, SLBR, args[1], args[5]);
2019 break;
2020
2021 case INDEX_op_br:
2022 tgen_branch(s, S390_CC_ALWAYS, arg_label(args[0]));
2023 break;
2024
2025 case INDEX_op_brcond_i32:
2026 tgen_brcond(s, TCG_TYPE_I32, args[2], args[0],
2027 args[1], const_args[1], arg_label(args[3]));
2028 break;
2029 case INDEX_op_setcond_i32:
2030 tgen_setcond(s, TCG_TYPE_I32, args[3], args[0], args[1],
2031 args[2], const_args[2]);
2032 break;
2033 case INDEX_op_movcond_i32:
2034 tgen_movcond(s, TCG_TYPE_I32, args[5], args[0], args[1],
2035 args[2], const_args[2], args[3], const_args[3]);
2036 break;
2037
2038 case INDEX_op_qemu_ld_i32:
2039 /* ??? Technically we can use a non-extending instruction. */
2040 case INDEX_op_qemu_ld_i64:
2041 tcg_out_qemu_ld(s, args[0], args[1], args[2]);
2042 break;
2043 case INDEX_op_qemu_st_i32:
2044 case INDEX_op_qemu_st_i64:
2045 tcg_out_qemu_st(s, args[0], args[1], args[2]);
2046 break;
2047
2048 case INDEX_op_ld16s_i64:
2049 tcg_out_mem(s, 0, RXY_LGH, args[0], args[1], TCG_REG_NONE, args[2]);
2050 break;
2051 case INDEX_op_ld32u_i64:
2052 tcg_out_mem(s, 0, RXY_LLGF, args[0], args[1], TCG_REG_NONE, args[2]);
2053 break;
2054 case INDEX_op_ld32s_i64:
2055 tcg_out_mem(s, 0, RXY_LGF, args[0], args[1], TCG_REG_NONE, args[2]);
2056 break;
2057 case INDEX_op_ld_i64:
2058 tcg_out_ld(s, TCG_TYPE_I64, args[0], args[1], args[2]);
2059 break;
2060
2061 case INDEX_op_st32_i64:
2062 tcg_out_st(s, TCG_TYPE_I32, args[0], args[1], args[2]);
2063 break;
2064 case INDEX_op_st_i64:
2065 tcg_out_st(s, TCG_TYPE_I64, args[0], args[1], args[2]);
2066 break;
2067
2068 case INDEX_op_add_i64:
2069 a0 = args[0], a1 = args[1], a2 = args[2];
2070 if (const_args[2]) {
2071 do_addi_64:
2072 if (a0 == a1) {
2073 if (a2 == (int16_t)a2) {
2074 tcg_out_insn(s, RI, AGHI, a0, a2);
2075 break;
2076 }
2077 if (s390_facilities & FACILITY_EXT_IMM) {
2078 if (a2 == (int32_t)a2) {
2079 tcg_out_insn(s, RIL, AGFI, a0, a2);
2080 break;
2081 } else if (a2 == (uint32_t)a2) {
2082 tcg_out_insn(s, RIL, ALGFI, a0, a2);
2083 break;
2084 } else if (-a2 == (uint32_t)-a2) {
2085 tcg_out_insn(s, RIL, SLGFI, a0, -a2);
2086 break;
2087 }
2088 }
2089 }
2090 tcg_out_mem(s, RX_LA, RXY_LAY, a0, a1, TCG_REG_NONE, a2);
2091 } else if (a0 == a1) {
2092 tcg_out_insn(s, RRE, AGR, a0, a2);
2093 } else {
2094 tcg_out_insn(s, RX, LA, a0, a1, a2, 0);
2095 }
2096 break;
2097 case INDEX_op_sub_i64:
2098 a0 = args[0], a1 = args[1], a2 = args[2];
2099 if (const_args[2]) {
2100 a2 = -a2;
2101 goto do_addi_64;
2102 } else if (a0 == a1) {
2103 tcg_out_insn(s, RRE, SGR, a0, a2);
2104 } else {
2105 tcg_out_insn(s, RRF, SGRK, a0, a1, a2);
2106 }
2107 break;
2108
2109 case INDEX_op_and_i64:
2110 a0 = args[0], a1 = args[1], a2 = args[2];
2111 if (const_args[2]) {
2112 tcg_out_mov(s, TCG_TYPE_I64, a0, a1);
2113 tgen_andi(s, TCG_TYPE_I64, args[0], args[2]);
2114 } else if (a0 == a1) {
2115 tcg_out_insn(s, RRE, NGR, args[0], args[2]);
2116 } else {
2117 tcg_out_insn(s, RRF, NGRK, a0, a1, a2);
2118 }
2119 break;
2120 case INDEX_op_or_i64:
2121 a0 = args[0], a1 = args[1], a2 = args[2];
2122 if (const_args[2]) {
2123 tcg_out_mov(s, TCG_TYPE_I64, a0, a1);
2124 tgen_ori(s, TCG_TYPE_I64, a0, a2);
2125 } else if (a0 == a1) {
2126 tcg_out_insn(s, RRE, OGR, a0, a2);
2127 } else {
2128 tcg_out_insn(s, RRF, OGRK, a0, a1, a2);
2129 }
2130 break;
2131 case INDEX_op_xor_i64:
2132 a0 = args[0], a1 = args[1], a2 = args[2];
2133 if (const_args[2]) {
2134 tcg_out_mov(s, TCG_TYPE_I64, a0, a1);
2135 tgen_xori(s, TCG_TYPE_I64, a0, a2);
2136 } else if (a0 == a1) {
2137 tcg_out_insn(s, RRE, XGR, a0, a2);
2138 } else {
2139 tcg_out_insn(s, RRF, XGRK, a0, a1, a2);
2140 }
2141 break;
2142
2143 case INDEX_op_neg_i64:
2144 tcg_out_insn(s, RRE, LCGR, args[0], args[1]);
2145 break;
2146 case INDEX_op_bswap64_i64:
2147 tcg_out_insn(s, RRE, LRVGR, args[0], args[1]);
2148 break;
2149
2150 case INDEX_op_mul_i64:
2151 if (const_args[2]) {
2152 if (args[2] == (int16_t)args[2]) {
2153 tcg_out_insn(s, RI, MGHI, args[0], args[2]);
2154 } else {
2155 tcg_out_insn(s, RIL, MSGFI, args[0], args[2]);
2156 }
2157 } else {
2158 tcg_out_insn(s, RRE, MSGR, args[0], args[2]);
2159 }
2160 break;
2161
2162 case INDEX_op_div2_i64:
2163 /* ??? We get an unnecessary sign-extension of the dividend
2164 into R3 with this definition, but as we do in fact always
2165 produce both quotient and remainder using INDEX_op_div_i64
2166 instead requires jumping through even more hoops. */
2167 tcg_out_insn(s, RRE, DSGR, TCG_REG_R2, args[4]);
2168 break;
2169 case INDEX_op_divu2_i64:
2170 tcg_out_insn(s, RRE, DLGR, TCG_REG_R2, args[4]);
2171 break;
2172 case INDEX_op_mulu2_i64:
2173 tcg_out_insn(s, RRE, MLGR, TCG_REG_R2, args[3]);
2174 break;
2175
2176 case INDEX_op_shl_i64:
2177 op = RSY_SLLG;
2178 do_shift64:
2179 if (const_args[2]) {
2180 tcg_out_sh64(s, op, args[0], args[1], TCG_REG_NONE, args[2]);
2181 } else {
2182 tcg_out_sh64(s, op, args[0], args[1], args[2], 0);
2183 }
2184 break;
2185 case INDEX_op_shr_i64:
2186 op = RSY_SRLG;
2187 goto do_shift64;
2188 case INDEX_op_sar_i64:
2189 op = RSY_SRAG;
2190 goto do_shift64;
2191
2192 case INDEX_op_rotl_i64:
2193 if (const_args[2]) {
2194 tcg_out_sh64(s, RSY_RLLG, args[0], args[1],
2195 TCG_REG_NONE, args[2]);
2196 } else {
2197 tcg_out_sh64(s, RSY_RLLG, args[0], args[1], args[2], 0);
2198 }
2199 break;
2200 case INDEX_op_rotr_i64:
2201 if (const_args[2]) {
2202 tcg_out_sh64(s, RSY_RLLG, args[0], args[1],
2203 TCG_REG_NONE, (64 - args[2]) & 63);
2204 } else {
2205 /* We can use the smaller 32-bit negate because only the
2206 low 6 bits are examined for the rotate. */
2207 tcg_out_insn(s, RR, LCR, TCG_TMP0, args[2]);
2208 tcg_out_sh64(s, RSY_RLLG, args[0], args[1], TCG_TMP0, 0);
2209 }
2210 break;
2211
2212 case INDEX_op_ext8s_i64:
2213 tgen_ext8s(s, TCG_TYPE_I64, args[0], args[1]);
2214 break;
2215 case INDEX_op_ext16s_i64:
2216 tgen_ext16s(s, TCG_TYPE_I64, args[0], args[1]);
2217 break;
2218 case INDEX_op_ext_i32_i64:
2219 case INDEX_op_ext32s_i64:
2220 tgen_ext32s(s, args[0], args[1]);
2221 break;
2222 case INDEX_op_ext8u_i64:
2223 tgen_ext8u(s, TCG_TYPE_I64, args[0], args[1]);
2224 break;
2225 case INDEX_op_ext16u_i64:
2226 tgen_ext16u(s, TCG_TYPE_I64, args[0], args[1]);
2227 break;
2228 case INDEX_op_extu_i32_i64:
2229 case INDEX_op_ext32u_i64:
2230 tgen_ext32u(s, args[0], args[1]);
2231 break;
2232
2233 case INDEX_op_add2_i64:
2234 if (const_args[4]) {
2235 if ((int64_t)args[4] >= 0) {
2236 tcg_out_insn(s, RIL, ALGFI, args[0], args[4]);
2237 } else {
2238 tcg_out_insn(s, RIL, SLGFI, args[0], -args[4]);
2239 }
2240 } else {
2241 tcg_out_insn(s, RRE, ALGR, args[0], args[4]);
2242 }
2243 tcg_out_insn(s, RRE, ALCGR, args[1], args[5]);
2244 break;
2245 case INDEX_op_sub2_i64:
2246 if (const_args[4]) {
2247 if ((int64_t)args[4] >= 0) {
2248 tcg_out_insn(s, RIL, SLGFI, args[0], args[4]);
2249 } else {
2250 tcg_out_insn(s, RIL, ALGFI, args[0], -args[4]);
2251 }
2252 } else {
2253 tcg_out_insn(s, RRE, SLGR, args[0], args[4]);
2254 }
2255 tcg_out_insn(s, RRE, SLBGR, args[1], args[5]);
2256 break;
2257
2258 case INDEX_op_brcond_i64:
2259 tgen_brcond(s, TCG_TYPE_I64, args[2], args[0],
2260 args[1], const_args[1], arg_label(args[3]));
2261 break;
2262 case INDEX_op_setcond_i64:
2263 tgen_setcond(s, TCG_TYPE_I64, args[3], args[0], args[1],
2264 args[2], const_args[2]);
2265 break;
2266 case INDEX_op_movcond_i64:
2267 tgen_movcond(s, TCG_TYPE_I64, args[5], args[0], args[1],
2268 args[2], const_args[2], args[3], const_args[3]);
2269 break;
2270
2271 OP_32_64(deposit):
2272 a0 = args[0], a1 = args[1], a2 = args[2];
2273 if (const_args[1]) {
2274 tgen_deposit(s, a0, a2, args[3], args[4], 1);
2275 } else {
2276 /* Since we can't support "0Z" as a constraint, we allow a1 in
2277 any register. Fix things up as if a matching constraint. */
2278 if (a0 != a1) {
2279 TCGType type = (opc == INDEX_op_deposit_i64);
2280 if (a0 == a2) {
2281 tcg_out_mov(s, type, TCG_TMP0, a2);
2282 a2 = TCG_TMP0;
2283 }
2284 tcg_out_mov(s, type, a0, a1);
2285 }
2286 tgen_deposit(s, a0, a2, args[3], args[4], 0);
2287 }
2288 break;
2289
2290 OP_32_64(extract):
2291 tgen_extract(s, args[0], args[1], args[2], args[3]);
2292 break;
2293
2294 case INDEX_op_clz_i64:
2295 tgen_clz(s, args[0], args[1], args[2], const_args[2]);
2296 break;
2297
2298 case INDEX_op_mb:
2299 /* The host memory model is quite strong, we simply need to
2300 serialize the instruction stream. */
2301 if (args[0] & TCG_MO_ST_LD) {
2302 tcg_out_insn(s, RR, BCR,
2303 s390_facilities & FACILITY_FAST_BCR_SER ? 14 : 15, 0);
2304 }
2305 break;
2306
2307 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
2308 case INDEX_op_mov_i64:
2309 case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */
2310 case INDEX_op_movi_i64:
2311 case INDEX_op_call: /* Always emitted via tcg_out_call. */
2312 default:
2313 tcg_abort();
2314 }
2315 }
2316
2317 static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
2318 {
2319 static const TCGTargetOpDef r = { .args_ct_str = { "r" } };
2320 static const TCGTargetOpDef r_r = { .args_ct_str = { "r", "r" } };
2321 static const TCGTargetOpDef r_L = { .args_ct_str = { "r", "L" } };
2322 static const TCGTargetOpDef L_L = { .args_ct_str = { "L", "L" } };
2323 static const TCGTargetOpDef r_ri = { .args_ct_str = { "r", "ri" } };
2324 static const TCGTargetOpDef r_r_ri = { .args_ct_str = { "r", "r", "ri" } };
2325 static const TCGTargetOpDef r_0_ri = { .args_ct_str = { "r", "0", "ri" } };
2326 static const TCGTargetOpDef r_0_rI = { .args_ct_str = { "r", "0", "rI" } };
2327 static const TCGTargetOpDef r_0_rJ = { .args_ct_str = { "r", "0", "rJ" } };
2328 static const TCGTargetOpDef a2_r
2329 = { .args_ct_str = { "r", "r", "0", "1", "r", "r" } };
2330 static const TCGTargetOpDef a2_ri
2331 = { .args_ct_str = { "r", "r", "0", "1", "ri", "r" } };
2332 static const TCGTargetOpDef a2_rA
2333 = { .args_ct_str = { "r", "r", "0", "1", "rA", "r" } };
2334
2335 switch (op) {
2336 case INDEX_op_goto_ptr:
2337 return &r;
2338
2339 case INDEX_op_ld8u_i32:
2340 case INDEX_op_ld8u_i64:
2341 case INDEX_op_ld8s_i32:
2342 case INDEX_op_ld8s_i64:
2343 case INDEX_op_ld16u_i32:
2344 case INDEX_op_ld16u_i64:
2345 case INDEX_op_ld16s_i32:
2346 case INDEX_op_ld16s_i64:
2347 case INDEX_op_ld_i32:
2348 case INDEX_op_ld32u_i64:
2349 case INDEX_op_ld32s_i64:
2350 case INDEX_op_ld_i64:
2351 case INDEX_op_st8_i32:
2352 case INDEX_op_st8_i64:
2353 case INDEX_op_st16_i32:
2354 case INDEX_op_st16_i64:
2355 case INDEX_op_st_i32:
2356 case INDEX_op_st32_i64:
2357 case INDEX_op_st_i64:
2358 return &r_r;
2359
2360 case INDEX_op_add_i32:
2361 case INDEX_op_add_i64:
2362 return &r_r_ri;
2363 case INDEX_op_sub_i32:
2364 case INDEX_op_sub_i64:
2365 case INDEX_op_and_i32:
2366 case INDEX_op_and_i64:
2367 case INDEX_op_or_i32:
2368 case INDEX_op_or_i64:
2369 case INDEX_op_xor_i32:
2370 case INDEX_op_xor_i64:
2371 return (s390_facilities & FACILITY_DISTINCT_OPS ? &r_r_ri : &r_0_ri);
2372
2373 case INDEX_op_mul_i32:
2374 /* If we have the general-instruction-extensions, then we have
2375 MULTIPLY SINGLE IMMEDIATE with a signed 32-bit, otherwise we
2376 have only MULTIPLY HALFWORD IMMEDIATE, with a signed 16-bit. */
2377 return (s390_facilities & FACILITY_GEN_INST_EXT ? &r_0_ri : &r_0_rI);
2378 case INDEX_op_mul_i64:
2379 return (s390_facilities & FACILITY_GEN_INST_EXT ? &r_0_rJ : &r_0_rI);
2380
2381 case INDEX_op_shl_i32:
2382 case INDEX_op_shr_i32:
2383 case INDEX_op_sar_i32:
2384 return (s390_facilities & FACILITY_DISTINCT_OPS ? &r_r_ri : &r_0_ri);
2385
2386 case INDEX_op_shl_i64:
2387 case INDEX_op_shr_i64:
2388 case INDEX_op_sar_i64:
2389 return &r_r_ri;
2390
2391 case INDEX_op_rotl_i32:
2392 case INDEX_op_rotl_i64:
2393 case INDEX_op_rotr_i32:
2394 case INDEX_op_rotr_i64:
2395 return &r_r_ri;
2396
2397 case INDEX_op_brcond_i32:
2398 case INDEX_op_brcond_i64:
2399 return &r_ri;
2400
2401 case INDEX_op_bswap16_i32:
2402 case INDEX_op_bswap16_i64:
2403 case INDEX_op_bswap32_i32:
2404 case INDEX_op_bswap32_i64:
2405 case INDEX_op_bswap64_i64:
2406 case INDEX_op_neg_i32:
2407 case INDEX_op_neg_i64:
2408 case INDEX_op_ext8s_i32:
2409 case INDEX_op_ext8s_i64:
2410 case INDEX_op_ext8u_i32:
2411 case INDEX_op_ext8u_i64:
2412 case INDEX_op_ext16s_i32:
2413 case INDEX_op_ext16s_i64:
2414 case INDEX_op_ext16u_i32:
2415 case INDEX_op_ext16u_i64:
2416 case INDEX_op_ext32s_i64:
2417 case INDEX_op_ext32u_i64:
2418 case INDEX_op_ext_i32_i64:
2419 case INDEX_op_extu_i32_i64:
2420 case INDEX_op_extract_i32:
2421 case INDEX_op_extract_i64:
2422 return &r_r;
2423
2424 case INDEX_op_clz_i64:
2425 case INDEX_op_setcond_i32:
2426 case INDEX_op_setcond_i64:
2427 return &r_r_ri;
2428
2429 case INDEX_op_qemu_ld_i32:
2430 case INDEX_op_qemu_ld_i64:
2431 return &r_L;
2432 case INDEX_op_qemu_st_i64:
2433 case INDEX_op_qemu_st_i32:
2434 return &L_L;
2435
2436 case INDEX_op_deposit_i32:
2437 case INDEX_op_deposit_i64:
2438 {
2439 static const TCGTargetOpDef dep
2440 = { .args_ct_str = { "r", "rZ", "r" } };
2441 return &dep;
2442 }
2443 case INDEX_op_movcond_i32:
2444 case INDEX_op_movcond_i64:
2445 {
2446 static const TCGTargetOpDef movc
2447 = { .args_ct_str = { "r", "r", "ri", "r", "0" } };
2448 static const TCGTargetOpDef movc_l
2449 = { .args_ct_str = { "r", "r", "ri", "rI", "0" } };
2450 return (s390_facilities & FACILITY_LOAD_ON_COND2 ? &movc_l : &movc);
2451 }
2452 case INDEX_op_div2_i32:
2453 case INDEX_op_div2_i64:
2454 case INDEX_op_divu2_i32:
2455 case INDEX_op_divu2_i64:
2456 {
2457 static const TCGTargetOpDef div2
2458 = { .args_ct_str = { "b", "a", "0", "1", "r" } };
2459 return &div2;
2460 }
2461 case INDEX_op_mulu2_i64:
2462 {
2463 static const TCGTargetOpDef mul2
2464 = { .args_ct_str = { "b", "a", "0", "r" } };
2465 return &mul2;
2466 }
2467
2468 case INDEX_op_add2_i32:
2469 case INDEX_op_sub2_i32:
2470 return (s390_facilities & FACILITY_EXT_IMM ? &a2_ri : &a2_r);
2471 case INDEX_op_add2_i64:
2472 case INDEX_op_sub2_i64:
2473 return (s390_facilities & FACILITY_EXT_IMM ? &a2_rA : &a2_r);
2474
2475 default:
2476 break;
2477 }
2478 return NULL;
2479 }
2480
2481 static void query_s390_facilities(void)
2482 {
2483 unsigned long hwcap = qemu_getauxval(AT_HWCAP);
2484
2485 /* Is STORE FACILITY LIST EXTENDED available? Honestly, I believe this
2486 is present on all 64-bit systems, but let's check for it anyway. */
2487 if (hwcap & HWCAP_S390_STFLE) {
2488 register int r0 __asm__("0");
2489 register void *r1 __asm__("1");
2490
2491 /* stfle 0(%r1) */
2492 r1 = &s390_facilities;
2493 asm volatile(".word 0xb2b0,0x1000"
2494 : "=r"(r0) : "0"(0), "r"(r1) : "memory", "cc");
2495 }
2496 }
2497
2498 static void tcg_target_init(TCGContext *s)
2499 {
2500 query_s390_facilities();
2501
2502 tcg_target_available_regs[TCG_TYPE_I32] = 0xffff;
2503 tcg_target_available_regs[TCG_TYPE_I64] = 0xffff;
2504
2505 tcg_target_call_clobber_regs = 0;
2506 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0);
2507 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1);
2508 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2);
2509 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3);
2510 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R4);
2511 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R5);
2512 /* The r6 register is technically call-saved, but it's also a parameter
2513 register, so it can get killed by setup for the qemu_st helper. */
2514 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R6);
2515 /* The return register can be considered call-clobbered. */
2516 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14);
2517
2518 s->reserved_regs = 0;
2519 tcg_regset_set_reg(s->reserved_regs, TCG_TMP0);
2520 /* XXX many insns can't be used with R0, so we better avoid it for now */
2521 tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0);
2522 tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
2523 if (USE_REG_TB) {
2524 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TB);
2525 }
2526 }
2527
2528 #define FRAME_SIZE ((int)(TCG_TARGET_CALL_STACK_OFFSET \
2529 + TCG_STATIC_CALL_ARGS_SIZE \
2530 + CPU_TEMP_BUF_NLONGS * sizeof(long)))
2531
2532 static void tcg_target_qemu_prologue(TCGContext *s)
2533 {
2534 /* stmg %r6,%r15,48(%r15) (save registers) */
2535 tcg_out_insn(s, RXY, STMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, 48);
2536
2537 /* aghi %r15,-frame_size */
2538 tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -FRAME_SIZE);
2539
2540 tcg_set_frame(s, TCG_REG_CALL_STACK,
2541 TCG_STATIC_CALL_ARGS_SIZE + TCG_TARGET_CALL_STACK_OFFSET,
2542 CPU_TEMP_BUF_NLONGS * sizeof(long));
2543
2544 #ifndef CONFIG_SOFTMMU
2545 if (guest_base >= 0x80000) {
2546 tcg_out_movi_int(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base, true);
2547 tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
2548 }
2549 #endif
2550
2551 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
2552 if (USE_REG_TB) {
2553 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_TB,
2554 tcg_target_call_iarg_regs[1]);
2555 }
2556
2557 /* br %r3 (go to TB) */
2558 tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, tcg_target_call_iarg_regs[1]);
2559
2560 /*
2561 * Return path for goto_ptr. Set return value to 0, a-la exit_tb,
2562 * and fall through to the rest of the epilogue.
2563 */
2564 s->code_gen_epilogue = s->code_ptr;
2565 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, 0);
2566
2567 /* TB epilogue */
2568 tb_ret_addr = s->code_ptr;
2569
2570 /* lmg %r6,%r15,fs+48(%r15) (restore registers) */
2571 tcg_out_insn(s, RXY, LMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15,
2572 FRAME_SIZE + 48);
2573
2574 /* br %r14 (return) */
2575 tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_R14);
2576 }
2577
2578 static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
2579 {
2580 memset(p, 0x07, count * sizeof(tcg_insn_unit));
2581 }
2582
2583 typedef struct {
2584 DebugFrameHeader h;
2585 uint8_t fde_def_cfa[4];
2586 uint8_t fde_reg_ofs[18];
2587 } DebugFrame;
2588
2589 /* We're expecting a 2 byte uleb128 encoded value. */
2590 QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14));
2591
2592 #define ELF_HOST_MACHINE EM_S390
2593
2594 static const DebugFrame debug_frame = {
2595 .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */
2596 .h.cie.id = -1,
2597 .h.cie.version = 1,
2598 .h.cie.code_align = 1,
2599 .h.cie.data_align = 8, /* sleb128 8 */
2600 .h.cie.return_column = TCG_REG_R14,
2601
2602 /* Total FDE size does not include the "len" member. */
2603 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
2604
2605 .fde_def_cfa = {
2606 12, TCG_REG_CALL_STACK, /* DW_CFA_def_cfa %r15, ... */
2607 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */
2608 (FRAME_SIZE >> 7)
2609 },
2610 .fde_reg_ofs = {
2611 0x86, 6, /* DW_CFA_offset, %r6, 48 */
2612 0x87, 7, /* DW_CFA_offset, %r7, 56 */
2613 0x88, 8, /* DW_CFA_offset, %r8, 64 */
2614 0x89, 9, /* DW_CFA_offset, %r92, 72 */
2615 0x8a, 10, /* DW_CFA_offset, %r10, 80 */
2616 0x8b, 11, /* DW_CFA_offset, %r11, 88 */
2617 0x8c, 12, /* DW_CFA_offset, %r12, 96 */
2618 0x8d, 13, /* DW_CFA_offset, %r13, 104 */
2619 0x8e, 14, /* DW_CFA_offset, %r14, 112 */
2620 }
2621 };
2622
2623 void tcg_register_jit(void *buf, size_t buf_size)
2624 {
2625 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
2626 }
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