[qemu.git] / target-cris / op_helper.c

/*
 *  CRIS helper routines
 *
 *  Copyright (c) 2007 AXIS Communications
 *  Written by Edgar E. Iglesias
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <assert.h>
#include "exec.h"
#include "mmu.h"

#define MMUSUFFIX _mmu
#ifdef __s390__
# define GETPC() ((void*)((unsigned long)__builtin_return_address(0) & 0x7fffffffUL))
#else
# define GETPC() (__builtin_return_address(0))
#endif

#define SHIFT 0
#include "softmmu_template.h"

#define SHIFT 1
#include "softmmu_template.h"

#define SHIFT 2
#include "softmmu_template.h"

#define SHIFT 3
#include "softmmu_template.h"

#define D(x)

/* Try to fill the TLB and return an exception if error. If retaddr is
   NULL, it means that the function was called in C code (i.e. not
   from generated code or from helper.c) */
/* XXX: fix it to restore all registers */
void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
{
    TranslationBlock *tb;
    CPUState *saved_env;
    unsigned long pc;
    int ret;

    /* XXX: hack to restore env in all cases, even if not called from
       generated code */
    saved_env = env;
    env = cpu_single_env;

    D(fprintf(logfile, "%s pc=%x tpc=%x ra=%x\n", __func__, 
	     env->pc, env->debug1, retaddr));
    ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
    if (__builtin_expect(ret, 0)) {
        if (retaddr) {
            /* now we have a real cpu fault */
            pc = (unsigned long)retaddr;
            tb = tb_find_pc(pc);
            if (tb) {
                /* the PC is inside the translated code. It means that we have
                   a virtual CPU fault */
                cpu_restore_state(tb, env, pc, NULL);
            }
        }
        cpu_loop_exit();
    }
    env = saved_env;
}

void helper_tlb_update(uint32_t T0)
{
#if !defined(CONFIG_USER_ONLY)
	uint32_t vaddr;
	uint32_t srs = env->pregs[PR_SRS];

	if (srs != 1 && srs != 2)
		return;

	vaddr = cris_mmu_tlb_latest_update(env, T0);
	D(fprintf(logfile, "flush old_vaddr=%x vaddr=%x T0=%x\n", vaddr, 
		 env->sregs[SFR_R_MM_CAUSE] & TARGET_PAGE_MASK, T0));
	tlb_flush_page(env, vaddr);
#endif
}

void helper_tlb_flush(void)
{
	tlb_flush(env, 1);
}

void helper_dump(uint32_t a0, uint32_t a1)
{
	(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1)); 
}

void helper_dummy(void)
{

}

/* Only used for debugging at the moment.  */
void helper_rfe(void)
{
	D(fprintf(logfile, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n", 
		 env->pregs[PR_ERP], env->pregs[PR_PID],
		 env->pregs[PR_CCS],
		 env->btarget));
}

void helper_store(uint32_t a0)
{
	if (env->pregs[PR_CCS] & P_FLAG )
	{
		cpu_abort(env, "cond_store_failed! pc=%x a0=%x\n",
			  env->pc, a0);
	}
}

void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
                          int is_asi)
{
	D(printf("%s addr=%x w=%d ex=%d asi=%d\n", 
		__func__, addr, is_write, is_exec, is_asi));
}

static void evaluate_flags_writeback(uint32_t flags)
{
	int x;

	/* Extended arithmetics, leave the z flag alone.  */
	env->debug3 = env->pregs[PR_CCS];

	if (env->cc_x_live)
		x = env->cc_x;
	else
		x = env->pregs[PR_CCS] & X_FLAG;

	if ((x || env->cc_op == CC_OP_ADDC)
	    && flags & Z_FLAG)
		env->cc_mask &= ~Z_FLAG;

	/* all insn clear the x-flag except setf or clrf.  */
	env->pregs[PR_CCS] &= ~(env->cc_mask | X_FLAG);
	flags &= env->cc_mask;
	env->pregs[PR_CCS] |= flags;
	RETURN();
}

void helper_evaluate_flags_muls(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;
	/* were gonna have to redo the muls.  */
	int64_t tmp, t0 ,t1;
	int32_t mof;
	int dneg;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;


	/* cast into signed values to make GCC sign extend.  */
	t0 = (int32_t)src;
	t1 = (int32_t)dst;
	dneg = ((int32_t)res) < 0;

	tmp = t0 * t1;
	mof = tmp >> 32;
	if (tmp == 0)
		flags |= Z_FLAG;
	else if (tmp < 0)
		flags |= N_FLAG;
	if ((dneg && mof != -1)
	    || (!dneg && mof != 0))
		flags |= V_FLAG;
	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_mulu(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;
	/* were gonna have to redo the muls.  */
	uint64_t tmp, t0 ,t1;
	uint32_t mof;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;


	/* cast into signed values to make GCC sign extend.  */
	t0 = src;
	t1 = dst;

	tmp = t0 * t1;
	mof = tmp >> 32;
	if (tmp == 0)
		flags |= Z_FLAG;
	else if (tmp >> 63)
		flags |= N_FLAG;
	if (mof)
		flags |= V_FLAG;

	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_mcp(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;

	if ((res & 0x80000000L) != 0L)
	{
		flags |= N_FLAG;
		if (((src & 0x80000000L) == 0L)
		    && ((dst & 0x80000000L) == 0L))
		{
			flags |= V_FLAG;
		}
		else if (((src & 0x80000000L) != 0L) &&
			 ((dst & 0x80000000L) != 0L))
		{
			flags |= R_FLAG;
		}
	}
	else
	{
		if (res == 0L)
			flags |= Z_FLAG;
		if (((src & 0x80000000L) != 0L)
		    && ((dst & 0x80000000L) != 0L))
			flags |= V_FLAG;
		if ((dst & 0x80000000L) != 0L
		    || (src & 0x80000000L) != 0L)
			flags |= R_FLAG;
	}

	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_alu_4(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;

	if ((res & 0x80000000L) != 0L)
	{
		flags |= N_FLAG;
		if (((src & 0x80000000L) == 0L)
		    && ((dst & 0x80000000L) == 0L))
		{
			flags |= V_FLAG;
		}
		else if (((src & 0x80000000L) != 0L) &&
			 ((dst & 0x80000000L) != 0L))
		{
			flags |= C_FLAG;
		}
	}
	else
	{
		if (res == 0L)
			flags |= Z_FLAG;
		if (((src & 0x80000000L) != 0L)
		    && ((dst & 0x80000000L) != 0L))
			flags |= V_FLAG;
		if ((dst & 0x80000000L) != 0L
		    || (src & 0x80000000L) != 0L)
			flags |= C_FLAG;
	}

	if (env->cc_op == CC_OP_SUB
	    || env->cc_op == CC_OP_CMP) {
		flags ^= C_FLAG;
	}
	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_move_4 (void)
{
	uint32_t src;
	uint32_t res;
	uint32_t flags = 0;

	src = env->cc_src;
	res = env->cc_result;

	if ((int32_t)res < 0)
		flags |= N_FLAG;
	else if (res == 0L)
		flags |= Z_FLAG;

	evaluate_flags_writeback(flags);
}
void  helper_evaluate_flags_move_2 (void)
{
	uint32_t src;
	uint32_t flags = 0;
	uint16_t res;

	src = env->cc_src;
	res = env->cc_result;

	if ((int16_t)res < 0L)
		flags |= N_FLAG;
	else if (res == 0)
		flags |= Z_FLAG;

	evaluate_flags_writeback(flags);
}

/* TODO: This is expensive. We could split things up and only evaluate part of
   CCR on a need to know basis. For now, we simply re-evaluate everything.  */
void helper_evaluate_flags (void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;


	/* Now, evaluate the flags. This stuff is based on
	   Per Zander's CRISv10 simulator.  */
	switch (env->cc_size)
	{
		case 1:
			if ((res & 0x80L) != 0L)
			{
				flags |= N_FLAG;
				if (((src & 0x80L) == 0L)
				    && ((dst & 0x80L) == 0L))
				{
					flags |= V_FLAG;
				}
				else if (((src & 0x80L) != 0L)
					 && ((dst & 0x80L) != 0L))
				{
					flags |= C_FLAG;
				}
			}
			else
			{
				if ((res & 0xFFL) == 0L)
				{
					flags |= Z_FLAG;
				}
				if (((src & 0x80L) != 0L)
				    && ((dst & 0x80L) != 0L))
				{
					flags |= V_FLAG;
				}
				if ((dst & 0x80L) != 0L
				    || (src & 0x80L) != 0L)
				{
					flags |= C_FLAG;
				}
			}
			break;
		case 2:
			if ((res & 0x8000L) != 0L)
			{
				flags |= N_FLAG;
				if (((src & 0x8000L) == 0L)
				    && ((dst & 0x8000L) == 0L))
				{
					flags |= V_FLAG;
				}
				else if (((src & 0x8000L) != 0L)
					 && ((dst & 0x8000L) != 0L))
				{
					flags |= C_FLAG;
				}
			}
			else
			{
				if ((res & 0xFFFFL) == 0L)
				{
					flags |= Z_FLAG;
				}
				if (((src & 0x8000L) != 0L)
				    && ((dst & 0x8000L) != 0L))
				{
					flags |= V_FLAG;
				}
				if ((dst & 0x8000L) != 0L
				    || (src & 0x8000L) != 0L)
				{
					flags |= C_FLAG;
				}
			}
			break;
		case 4:
			if ((res & 0x80000000L) != 0L)
			{
				flags |= N_FLAG;
				if (((src & 0x80000000L) == 0L)
				    && ((dst & 0x80000000L) == 0L))
				{
					flags |= V_FLAG;
				}
				else if (((src & 0x80000000L) != 0L) &&
					 ((dst & 0x80000000L) != 0L))
				{
					flags |= C_FLAG;
				}
			}
			else
			{
				if (res == 0L)
					flags |= Z_FLAG;
				if (((src & 0x80000000L) != 0L)
				    && ((dst & 0x80000000L) != 0L))
					flags |= V_FLAG;
				if ((dst & 0x80000000L) != 0L
				    || (src & 0x80000000L) != 0L)
					flags |= C_FLAG;
			}
			break;
		default:
			break;
	}

	if (env->cc_op == CC_OP_SUB
	    || env->cc_op == CC_OP_CMP) {
		flags ^= C_FLAG;
	}
	evaluate_flags_writeback(flags);
}
Commit	Line	Data
81fdc5f8 TS	1	/*
	2	* CRIS helper routines
	3	*
	4	* Copyright (c) 2007 AXIS Communications
	5	* Written by Edgar E. Iglesias
	6	*
	7	* This library is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2 of the License, or (at your option) any later version.
	11	*
	12	* This library is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with this library; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <assert.h>
	23	#include "exec.h"
786c02f1	24	#include "mmu.h"
81fdc5f8 TS	25
81fdc5f8 TS	26	#define MMUSUFFIX _mmu
273af660 TS	27	#ifdef __s390__
	28	# define GETPC() ((void*)((unsigned long)__builtin_return_address(0) & 0x7fffffffUL))
	29	#else
	30	# define GETPC() (__builtin_return_address(0))
	31	#endif
81fdc5f8 TS	32
	33	#define SHIFT 0
	34	#include "softmmu_template.h"
	35
	36	#define SHIFT 1
	37	#include "softmmu_template.h"
	38
	39	#define SHIFT 2
	40	#include "softmmu_template.h"
	41
	42	#define SHIFT 3
	43	#include "softmmu_template.h"
	44
786c02f1 EI	45	#define D(x)
786c02f1 EI	46
81fdc5f8 TS	47	/* Try to fill the TLB and return an exception if error. If retaddr is
	48	NULL, it means that the function was called in C code (i.e. not
	49	from generated code or from helper.c) */
	50	/* XXX: fix it to restore all registers */
6ebbf390	51	void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
81fdc5f8 TS	52	{
	53	TranslationBlock *tb;
	54	CPUState *saved_env;
44f8625d	55	unsigned long pc;
81fdc5f8 TS	56	int ret;
	57
	58	/* XXX: hack to restore env in all cases, even if not called from
	59	generated code */
	60	saved_env = env;
	61	env = cpu_single_env;
b41f7df0	62
ef29a70d EI	63	D(fprintf(logfile, "%s pc=%x tpc=%x ra=%x\n", __func__,
ef29a70d EI	64	env->pc, env->debug1, retaddr));
6ebbf390	65	ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
81fdc5f8 TS	66	if (__builtin_expect(ret, 0)) {
	67	if (retaddr) {
	68	/* now we have a real cpu fault */
44f8625d	69	pc = (unsigned long)retaddr;
81fdc5f8 TS	70	tb = tb_find_pc(pc);
	71	if (tb) {
	72	/* the PC is inside the translated code. It means that we have
	73	a virtual CPU fault */
	74	cpu_restore_state(tb, env, pc, NULL);
	75	}
	76	}
	77	cpu_loop_exit();
	78	}
	79	env = saved_env;
	80	}
	81
786c02f1 EI	82	void helper_tlb_update(uint32_t T0)
	83	{
	84	#if !defined(CONFIG_USER_ONLY)
	85	uint32_t vaddr;
b41f7df0 EI	86	uint32_t srs = env->pregs[PR_SRS];
	87
	88	if (srs != 1 && srs != 2)
	89	return;
786c02f1 EI	90
786c02f1 EI	91	vaddr = cris_mmu_tlb_latest_update(env, T0);
ef29a70d	92	D(fprintf(logfile, "flush old_vaddr=%x vaddr=%x T0=%x\n", vaddr,
b41f7df0	93	env->sregs[SFR_R_MM_CAUSE] & TARGET_PAGE_MASK, T0));
786c02f1 EI	94	tlb_flush_page(env, vaddr);
	95	#endif
	96	}
	97
b41f7df0 EI	98	void helper_tlb_flush(void)
	99	{
	100	tlb_flush(env, 1);
	101	}
	102
	103	void helper_dump(uint32_t a0, uint32_t a1)
	104	{
	105	(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1));
	106	}
	107
	108	void helper_dummy(void)
	109	{
	110
	111	}
	112
	113	/* Only used for debugging at the moment. */
	114	void helper_rfe(void)
	115	{
	116	D(fprintf(logfile, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n",
	117	env->pregs[PR_ERP], env->pregs[PR_PID],
	118	env->pregs[PR_CCS],
	119	env->btarget));
	120	}
	121
	122	void helper_store(uint32_t a0)
	123	{
	124	if (env->pregs[PR_CCS] & P_FLAG )
	125	{
	126	cpu_abort(env, "cond_store_failed! pc=%x a0=%x\n",
	127	env->pc, a0);
	128	}
	129	}
	130
81fdc5f8 TS	131	void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
	132	int is_asi)
	133	{
786c02f1 EI	134	D(printf("%s addr=%x w=%d ex=%d asi=%d\n",
786c02f1 EI	135	__func__, addr, is_write, is_exec, is_asi));
81fdc5f8	136	}
b41f7df0 EI	137
	138	static void evaluate_flags_writeback(uint32_t flags)
	139	{
	140	int x;
	141
	142	/* Extended arithmetics, leave the z flag alone. */
	143	env->debug3 = env->pregs[PR_CCS];
	144
	145	if (env->cc_x_live)
	146	x = env->cc_x;
	147	else
	148	x = env->pregs[PR_CCS] & X_FLAG;
	149
	150	if ((x \|\| env->cc_op == CC_OP_ADDC)
	151	&& flags & Z_FLAG)
	152	env->cc_mask &= ~Z_FLAG;
	153
	154	/* all insn clear the x-flag except setf or clrf. */
	155	env->pregs[PR_CCS] &= ~(env->cc_mask \| X_FLAG);
	156	flags &= env->cc_mask;
	157	env->pregs[PR_CCS] \|= flags;
	158	RETURN();
	159	}
	160
	161	void helper_evaluate_flags_muls(void)
	162	{
	163	uint32_t src;
	164	uint32_t dst;
	165	uint32_t res;
	166	uint32_t flags = 0;
	167	/* were gonna have to redo the muls. */
	168	int64_t tmp, t0 ,t1;
	169	int32_t mof;
	170	int dneg;
	171
	172	src = env->cc_src;
	173	dst = env->cc_dest;
	174	res = env->cc_result;
	175
	176
	177	/* cast into signed values to make GCC sign extend. */
	178	t0 = (int32_t)src;
	179	t1 = (int32_t)dst;
	180	dneg = ((int32_t)res) < 0;
	181
	182	tmp = t0 * t1;
	183	mof = tmp >> 32;
	184	if (tmp == 0)
	185	flags \|= Z_FLAG;
	186	else if (tmp < 0)
	187	flags \|= N_FLAG;
	188	if ((dneg && mof != -1)
	189	\|\| (!dneg && mof != 0))
	190	flags \|= V_FLAG;
	191	evaluate_flags_writeback(flags);
	192	}
	193
	194	void helper_evaluate_flags_mulu(void)
	195	{
	196	uint32_t src;
	197	uint32_t dst;
	198	uint32_t res;
	199	uint32_t flags = 0;
	200	/* were gonna have to redo the muls. */
201	uint64_t tmp, t0 ,t1;
202	uint32_t mof;
203
204	src = env->cc_src;
205	dst = env->cc_dest;
206	res = env->cc_result;
207
208
209	/* cast into signed values to make GCC sign extend. */
210	t0 = src;
211	t1 = dst;
212
213	tmp = t0 * t1;
214	mof = tmp >> 32;
215	if (tmp == 0)
216	flags \|= Z_FLAG;
217	else if (tmp >> 63)
218	flags \|= N_FLAG;
219	if (mof)
220	flags \|= V_FLAG;
221
222	evaluate_flags_writeback(flags);
223	}
224
225	void helper_evaluate_flags_mcp(void)
226	{
227	uint32_t src;
228	uint32_t dst;
229	uint32_t res;
230	uint32_t flags = 0;
231
232	src = env->cc_src;
233	dst = env->cc_dest;
234	res = env->cc_result;
235
236	if ((res & 0x80000000L) != 0L)
237	{
238	flags \|= N_FLAG;
239	if (((src & 0x80000000L) == 0L)
240	&& ((dst & 0x80000000L) == 0L))
241	{
242	flags \|= V_FLAG;
243	}
244	else if (((src & 0x80000000L) != 0L) &&
245	((dst & 0x80000000L) != 0L))
246	{
247	flags \|= R_FLAG;
248	}
249	}
250	else
251	{
252	if (res == 0L)
253	flags \|= Z_FLAG;
254	if (((src & 0x80000000L) != 0L)
255	&& ((dst & 0x80000000L) != 0L))
256	flags \|= V_FLAG;
257	if ((dst & 0x80000000L) != 0L
258	\|\| (src & 0x80000000L) != 0L)
259	flags \|= R_FLAG;
260	}
261
262	evaluate_flags_writeback(flags);
263	}
264
265	void helper_evaluate_flags_alu_4(void)
266	{
267	uint32_t src;
268	uint32_t dst;
269	uint32_t res;
270	uint32_t flags = 0;
271
272	src = env->cc_src;
273	dst = env->cc_dest;
274	res = env->cc_result;
275
276	if ((res & 0x80000000L) != 0L)
277	{
278	flags \|= N_FLAG;
279	if (((src & 0x80000000L) == 0L)
280	&& ((dst & 0x80000000L) == 0L))
281	{
282	flags \|= V_FLAG;
283	}
284	else if (((src & 0x80000000L) != 0L) &&
285	((dst & 0x80000000L) != 0L))
286	{
287	flags \|= C_FLAG;
288	}
289	}
290	else
291	{
292	if (res == 0L)
293	flags \|= Z_FLAG;
294	if (((src & 0x80000000L) != 0L)
295	&& ((dst & 0x80000000L) != 0L))
296	flags \|= V_FLAG;
297	if ((dst & 0x80000000L) != 0L
298	\|\| (src & 0x80000000L) != 0L)
299	flags \|= C_FLAG;
300	}
301
302	if (env->cc_op == CC_OP_SUB
303	\|\| env->cc_op == CC_OP_CMP) {
304	flags ^= C_FLAG;
305	}
306	evaluate_flags_writeback(flags);
307	}
308
309	void helper_evaluate_flags_move_4 (void)
310	{
311	uint32_t src;
312	uint32_t res;
313	uint32_t flags = 0;
314
315	src = env->cc_src;
316	res = env->cc_result;
317
318	if ((int32_t)res < 0)
319	flags \|= N_FLAG;
320	else if (res == 0L)
321	flags \|= Z_FLAG;
322
323	evaluate_flags_writeback(flags);
324	}
325	void helper_evaluate_flags_move_2 (void)
326	{
327	uint32_t src;
328	uint32_t flags = 0;
329	uint16_t res;
330
331	src = env->cc_src;
332	res = env->cc_result;
333
334	if ((int16_t)res < 0L)
335	flags \|= N_FLAG;
336	else if (res == 0)
337	flags \|= Z_FLAG;
338
339	evaluate_flags_writeback(flags);
340	}
341
342	/* TODO: This is expensive. We could split things up and only evaluate part of
343	CCR on a need to know basis. For now, we simply re-evaluate everything. */
344	void helper_evaluate_flags (void)
345	{
346	uint32_t src;
347	uint32_t dst;
348	uint32_t res;
349	uint32_t flags = 0;
350
351	src = env->cc_src;
352	dst = env->cc_dest;
353	res = env->cc_result;
354
355
356	/* Now, evaluate the flags. This stuff is based on
357	Per Zander's CRISv10 simulator. */
358	switch (env->cc_size)
359	{
360	case 1:
361	if ((res & 0x80L) != 0L)
362	{
363	flags \|= N_FLAG;
364	if (((src & 0x80L) == 0L)
365	&& ((dst & 0x80L) == 0L))
366	{
367	flags \|= V_FLAG;
368	}
369	else if (((src & 0x80L) != 0L)
370	&& ((dst & 0x80L) != 0L))
371	{
372	flags \|= C_FLAG;
373	}
374	}
375	else
376	{
377	if ((res & 0xFFL) == 0L)
378	{
379	flags \|= Z_FLAG;
380	}
381	if (((src & 0x80L) != 0L)
382	&& ((dst & 0x80L) != 0L))
383	{
384	flags \|= V_FLAG;
385	}
386	if ((dst & 0x80L) != 0L
387	\|\| (src & 0x80L) != 0L)
388	{
389	flags \|= C_FLAG;
390	}
391	}
392	break;
393	case 2:
394	if ((res & 0x8000L) != 0L)
395	{
396	flags \|= N_FLAG;
397	if (((src & 0x8000L) == 0L)
398	&& ((dst & 0x8000L) == 0L))
399	{
400	flags \|= V_FLAG;
401	}
402	else if (((src & 0x8000L) != 0L)
403	&& ((dst & 0x8000L) != 0L))
404	{
405	flags \|= C_FLAG;
406	}
407	}
408	else
409	{
410	if ((res & 0xFFFFL) == 0L)
411	{
412	flags \|= Z_FLAG;
413	}
414	if (((src & 0x8000L) != 0L)
415	&& ((dst & 0x8000L) != 0L))
416	{
417	flags \|= V_FLAG;
418	}
419	if ((dst & 0x8000L) != 0L
420	\|\| (src & 0x8000L) != 0L)
421	{
422	flags \|= C_FLAG;
423	}
424	}
425	break;
426	case 4:
427	if ((res & 0x80000000L) != 0L)
428	{
429	flags \|= N_FLAG;
430	if (((src & 0x80000000L) == 0L)
431	&& ((dst & 0x80000000L) == 0L))
432	{
433	flags \|= V_FLAG;
434	}
435	else if (((src & 0x80000000L) != 0L) &&
436	((dst & 0x80000000L) != 0L))
437	{
438	flags \|= C_FLAG;
439	}
440	}
441	else
442	{
443	if (res == 0L)
444	flags \|= Z_FLAG;
445	if (((src & 0x80000000L) != 0L)
446	&& ((dst & 0x80000000L) != 0L))
447	flags \|= V_FLAG;
448	if ((dst & 0x80000000L) != 0L
449	\|\| (src & 0x80000000L) != 0L)
450	flags \|= C_FLAG;
451	}
452	break;
453	default:
454	break;
455	}
456
457	if (env->cc_op == CC_OP_SUB
458	\|\| env->cc_op == CC_OP_CMP) {
459	flags ^= C_FLAG;
460	}
461	evaluate_flags_writeback(flags);
462	}