[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"
#include "helper.h"

#define MMUSUFFIX _mmu

#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);

		/* Evaluate flags after retranslation.  */
                helper_top_evaluate_flags();
            }
        }
        cpu_loop_exit();
    }
    env = saved_env;
}

void helper_raise_exception(uint32_t index)
{
	env->exception_index = index;
	cpu_loop_exit();
}

void helper_tlb_flush_pid(uint32_t pid)
{
#if !defined(CONFIG_USER_ONLY)
	cris_mmu_flush_pid(env, pid);
#endif
}

void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
{
	(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1)); 
}

void helper_dummy(void)
{

}

/* Used by the tlb decoder.  */
#define EXTRACT_FIELD(src, start, end) \
	    (((src) >> start) & ((1 << (end - start + 1)) - 1))

void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
{
	uint32_t srs;
	srs = env->pregs[PR_SRS];
	srs &= 3;
	env->sregs[srs][sreg] = env->regs[reg];

#if !defined(CONFIG_USER_ONLY)
	if (srs == 1 || srs == 2) {
		if (sreg == 6) {
			/* Writes to tlb-hi write to mm_cause as a side 
			   effect.  */
			env->sregs[SFR_RW_MM_TLB_HI] = T0;
			env->sregs[SFR_R_MM_CAUSE] = T0;
		}
		else if (sreg == 5) {
			uint32_t set;
			uint32_t idx;
			uint32_t lo, hi;
			uint32_t vaddr;
			int tlb_v;

			idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
			set >>= 4;
			set &= 3;

			idx &= 15;
			/* We've just made a write to tlb_lo.  */
			lo = env->sregs[SFR_RW_MM_TLB_LO];
			/* Writes are done via r_mm_cause.  */
			hi = env->sregs[SFR_R_MM_CAUSE];

			vaddr = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].hi,
					      13, 31);
			vaddr <<= TARGET_PAGE_BITS;
			tlb_v = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].lo,
					    3, 3);
			env->tlbsets[srs - 1][set][idx].lo = lo;
			env->tlbsets[srs - 1][set][idx].hi = hi;

			D(fprintf(logfile, 
				  "tlb flush vaddr=%x v=%d pc=%x\n", 
				  vaddr, tlb_v, env->pc));
			tlb_flush_page(env, vaddr);
		}
	}
#endif
}

void helper_movl_reg_sreg (uint32_t reg, uint32_t sreg)
{
	uint32_t srs;
	env->pregs[PR_SRS] &= 3;
	srs = env->pregs[PR_SRS];
	
#if !defined(CONFIG_USER_ONLY)
	if (srs == 1 || srs == 2)
	{
		uint32_t set;
		uint32_t idx;
		uint32_t lo, hi;

		idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
		set >>= 4;
		set &= 3;
		idx &= 15;

		/* Update the mirror regs.  */
		hi = env->tlbsets[srs - 1][set][idx].hi;
		lo = env->tlbsets[srs - 1][set][idx].lo;
		env->sregs[SFR_RW_MM_TLB_HI] = hi;
		env->sregs[SFR_RW_MM_TLB_LO] = lo;
	}
#endif
	env->regs[reg] = env->sregs[srs][sreg];
	RETURN();
}

static void cris_ccs_rshift(CPUState *env)
{
	uint32_t ccs;

	/* Apply the ccs shift.  */
	ccs = env->pregs[PR_CCS];
	ccs = (ccs & 0xc0000000) | ((ccs & 0x0fffffff) >> 10);
	if (ccs & U_FLAG)
	{
		/* Enter user mode.  */
		env->ksp = env->regs[R_SP];
		env->regs[R_SP] = env->pregs[PR_USP];
	}

	env->pregs[PR_CCS] = ccs;
}

void helper_rfe(void)
{
	int rflag = env->pregs[PR_CCS] & R_FLAG;

	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));

	cris_ccs_rshift(env);

	/* RFE sets the P_FLAG only if the R_FLAG is not set.  */
	if (!rflag)
		env->pregs[PR_CCS] |= P_FLAG;
}

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.  */
	x = env->cc_x;
	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;
}

void helper_evaluate_flags_muls(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;
	int64_t tmp;
	int32_t mof;
	int dneg;

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

	dneg = ((int32_t)res) < 0;

	mof = env->pregs[PR_MOF];
	tmp = mof;
	tmp <<= 32;
	tmp |= res;
	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;
	uint64_t tmp;
	uint32_t mof;

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

	mof = env->pregs[PR_MOF];
	tmp = mof;
	tmp <<= 32;
	tmp |= res;
	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;

	/* Reconstruct the result.  */
	switch (env->cc_op)
	{
		case CC_OP_SUB:
			res = dst - src;
			break;
		case CC_OP_ADD:
			res = dst + src;
			break;
		default:
			res = env->cc_result;
			break;
	}

	if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
		src = ~src;

	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 res;
	uint32_t flags = 0;

	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;

	if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
		src = ~src;

	/* 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);
}

void helper_top_evaluate_flags(void)
{
	switch (env->cc_op)
	{
		case CC_OP_MCP:
			helper_evaluate_flags_mcp();
			break;
		case CC_OP_MULS:
			helper_evaluate_flags_muls();
			break;
		case CC_OP_MULU:
			helper_evaluate_flags_mulu();
			break;
		case CC_OP_MOVE:
		case CC_OP_AND:
		case CC_OP_OR:
		case CC_OP_XOR:
		case CC_OP_ASR:
		case CC_OP_LSR:
		case CC_OP_LSL:
			switch (env->cc_size)
			{
				case 4:
					helper_evaluate_flags_move_4();
					break;
				case 2:
					helper_evaluate_flags_move_2();
					break;
				default:
					helper_evaluate_flags();
					break;
			}
			break;
		case CC_OP_FLAGS:
			/* live.  */
			break;
		default:
		{
			switch (env->cc_size)
			{
				case 4:
					helper_evaluate_flags_alu_4();
					break;
				default:
					helper_evaluate_flags();
					break;
			}
		}
		break;
	}
}
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"
30abcfc7	25	#include "helper.h"
81fdc5f8 TS	26
81fdc5f8 TS	27	#define MMUSUFFIX _mmu
81fdc5f8 TS	28
	29	#define SHIFT 0
	30	#include "softmmu_template.h"
	31
	32	#define SHIFT 1
	33	#include "softmmu_template.h"
	34
	35	#define SHIFT 2
	36	#include "softmmu_template.h"
	37
	38	#define SHIFT 3
	39	#include "softmmu_template.h"
	40
786c02f1 EI	41	#define D(x)
786c02f1 EI	42
81fdc5f8 TS	43	/* Try to fill the TLB and return an exception if error. If retaddr is
	44	NULL, it means that the function was called in C code (i.e. not
	45	from generated code or from helper.c) */
	46	/* XXX: fix it to restore all registers */
6ebbf390	47	void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
81fdc5f8 TS	48	{
	49	TranslationBlock *tb;
	50	CPUState *saved_env;
44f8625d	51	unsigned long pc;
81fdc5f8 TS	52	int ret;
	53
	54	/* XXX: hack to restore env in all cases, even if not called from
	55	generated code */
	56	saved_env = env;
	57	env = cpu_single_env;
b41f7df0	58
ef29a70d EI	59	D(fprintf(logfile, "%s pc=%x tpc=%x ra=%x\n", __func__,
ef29a70d EI	60	env->pc, env->debug1, retaddr));
6ebbf390	61	ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
81fdc5f8 TS	62	if (__builtin_expect(ret, 0)) {
	63	if (retaddr) {
	64	/* now we have a real cpu fault */
44f8625d	65	pc = (unsigned long)retaddr;
81fdc5f8 TS	66	tb = tb_find_pc(pc);
	67	if (tb) {
	68	/* the PC is inside the translated code. It means that we have
	69	a virtual CPU fault */
	70	cpu_restore_state(tb, env, pc, NULL);
30abcfc7 EI	71
	72	/* Evaluate flags after retranslation. */
	73	helper_top_evaluate_flags();
81fdc5f8 TS	74	}
	75	}
	76	cpu_loop_exit();
	77	}
	78	env = saved_env;
	79	}
	80
dceaf394	81	void helper_raise_exception(uint32_t index)
786c02f1	82	{
dceaf394 EI	83	env->exception_index = index;
dceaf394 EI	84	cpu_loop_exit();
786c02f1 EI	85	}
786c02f1 EI	86
cf1d97f0 EI	87	void helper_tlb_flush_pid(uint32_t pid)
	88	{
	89	#if !defined(CONFIG_USER_ONLY)
	90	cris_mmu_flush_pid(env, pid);
	91	#endif
	92	}
	93
30abcfc7	94	void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
b41f7df0 EI	95	{
	96	(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1));
	97	}
	98
	99	void helper_dummy(void)
	100	{
	101
	102	}
	103
cf1d97f0 EI	104	/* Used by the tlb decoder. */
	105	#define EXTRACT_FIELD(src, start, end) \
	106	(((src) >> start) & ((1 << (end - start + 1)) - 1))
	107
dceaf394 EI	108	void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
	109	{
	110	uint32_t srs;
	111	srs = env->pregs[PR_SRS];
	112	srs &= 3;
	113	env->sregs[srs][sreg] = env->regs[reg];
	114
	115	#if !defined(CONFIG_USER_ONLY)
	116	if (srs == 1 \|\| srs == 2) {
	117	if (sreg == 6) {
	118	/* Writes to tlb-hi write to mm_cause as a side
	119	effect. */
	120	env->sregs[SFR_RW_MM_TLB_HI] = T0;
	121	env->sregs[SFR_R_MM_CAUSE] = T0;
	122	}
	123	else if (sreg == 5) {
	124	uint32_t set;
	125	uint32_t idx;
	126	uint32_t lo, hi;
	127	uint32_t vaddr;
cf1d97f0	128	int tlb_v;
dceaf394 EI	129
	130	idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
	131	set >>= 4;
	132	set &= 3;
	133
	134	idx &= 15;
	135	/* We've just made a write to tlb_lo. */
	136	lo = env->sregs[SFR_RW_MM_TLB_LO];
	137	/* Writes are done via r_mm_cause. */
	138	hi = env->sregs[SFR_R_MM_CAUSE];
cf1d97f0 EI	139
	140	vaddr = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].hi,
	141	13, 31);
	142	vaddr <<= TARGET_PAGE_BITS;
	143	tlb_v = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].lo,
	144	3, 3);
dceaf394 EI	145	env->tlbsets[srs - 1][set][idx].lo = lo;
dceaf394 EI	146	env->tlbsets[srs - 1][set][idx].hi = hi;
cf1d97f0 EI	147
	148	D(fprintf(logfile,
	149	"tlb flush vaddr=%x v=%d pc=%x\n",
	150	vaddr, tlb_v, env->pc));
	151	tlb_flush_page(env, vaddr);
dceaf394 EI	152	}
	153	}
	154	#endif
	155	}
	156
	157	void helper_movl_reg_sreg (uint32_t reg, uint32_t sreg)
	158	{
	159	uint32_t srs;
	160	env->pregs[PR_SRS] &= 3;
	161	srs = env->pregs[PR_SRS];
	162
	163	#if !defined(CONFIG_USER_ONLY)
	164	if (srs == 1 \|\| srs == 2)
	165	{
	166	uint32_t set;
	167	uint32_t idx;
	168	uint32_t lo, hi;
	169
	170	idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
	171	set >>= 4;
	172	set &= 3;
	173	idx &= 15;
	174
	175	/* Update the mirror regs. */
	176	hi = env->tlbsets[srs - 1][set][idx].hi;
	177	lo = env->tlbsets[srs - 1][set][idx].lo;
	178	env->sregs[SFR_RW_MM_TLB_HI] = hi;
	179	env->sregs[SFR_RW_MM_TLB_LO] = lo;
	180	}
	181	#endif
	182	env->regs[reg] = env->sregs[srs][sreg];
	183	RETURN();
	184	}
	185
	186	static void cris_ccs_rshift(CPUState *env)
	187	{
	188	uint32_t ccs;
	189
	190	/* Apply the ccs shift. */
	191	ccs = env->pregs[PR_CCS];
	192	ccs = (ccs & 0xc0000000) \| ((ccs & 0x0fffffff) >> 10);
	193	if (ccs & U_FLAG)
	194	{
	195	/* Enter user mode. */
	196	env->ksp = env->regs[R_SP];
	197	env->regs[R_SP] = env->pregs[PR_USP];
	198	}
	199
	200	env->pregs[PR_CCS] = ccs;
	201	}
	202
b41f7df0 EI	203	void helper_rfe(void)
b41f7df0 EI	204	{
bf443337 EI	205	int rflag = env->pregs[PR_CCS] & R_FLAG;
bf443337 EI	206
b41f7df0 EI	207	D(fprintf(logfile, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n",
	208	env->pregs[PR_ERP], env->pregs[PR_PID],
	209	env->pregs[PR_CCS],
	210	env->btarget));
dceaf394 EI	211
	212	cris_ccs_rshift(env);
	213
	214	/* RFE sets the P_FLAG only if the R_FLAG is not set. */
bf443337	215	if (!rflag)
dceaf394	216	env->pregs[PR_CCS] \|= P_FLAG;
b41f7df0 EI	217	}
	218
	219	void helper_store(uint32_t a0)
	220	{
	221	if (env->pregs[PR_CCS] & P_FLAG )
	222	{
	223	cpu_abort(env, "cond_store_failed! pc=%x a0=%x\n",
	224	env->pc, a0);
	225	}
	226	}
	227
81fdc5f8 TS	228	void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
	229	int is_asi)
	230	{
786c02f1 EI	231	D(printf("%s addr=%x w=%d ex=%d asi=%d\n",
786c02f1 EI	232	__func__, addr, is_write, is_exec, is_asi));
81fdc5f8	233	}
b41f7df0 EI	234
	235	static void evaluate_flags_writeback(uint32_t flags)
	236	{
	237	int x;
	238
	239	/* Extended arithmetics, leave the z flag alone. */
30abcfc7	240	x = env->cc_x;
b41f7df0 EI	241	if ((x \|\| env->cc_op == CC_OP_ADDC)
	242	&& flags & Z_FLAG)
	243	env->cc_mask &= ~Z_FLAG;
	244
	245	/* all insn clear the x-flag except setf or clrf. */
	246	env->pregs[PR_CCS] &= ~(env->cc_mask \| X_FLAG);
	247	flags &= env->cc_mask;
	248	env->pregs[PR_CCS] \|= flags;
b41f7df0 EI	249	}
	250
	251	void helper_evaluate_flags_muls(void)
	252	{
	253	uint32_t src;
	254	uint32_t dst;
	255	uint32_t res;
	256	uint32_t flags = 0;
dceaf394	257	int64_t tmp;
b41f7df0 EI	258	int32_t mof;
	259	int dneg;
	260
	261	src = env->cc_src;
	262	dst = env->cc_dest;
	263	res = env->cc_result;
	264
b41f7df0 EI	265	dneg = ((int32_t)res) < 0;
b41f7df0 EI	266
dceaf394 EI	267	mof = env->pregs[PR_MOF];
	268	tmp = mof;
	269	tmp <<= 32;
	270	tmp \|= res;
b41f7df0 EI	271	if (tmp == 0)
	272	flags \|= Z_FLAG;
	273	else if (tmp < 0)
	274	flags \|= N_FLAG;
	275	if ((dneg && mof != -1)
	276	\|\| (!dneg && mof != 0))
	277	flags \|= V_FLAG;
	278	evaluate_flags_writeback(flags);
	279	}
	280
	281	void helper_evaluate_flags_mulu(void)
	282	{
	283	uint32_t src;
	284	uint32_t dst;
	285	uint32_t res;
	286	uint32_t flags = 0;
dceaf394	287	uint64_t tmp;
b41f7df0 EI	288	uint32_t mof;
	289
	290	src = env->cc_src;
	291	dst = env->cc_dest;
	292	res = env->cc_result;
	293
dceaf394 EI	294	mof = env->pregs[PR_MOF];
	295	tmp = mof;
	296	tmp <<= 32;
	297	tmp \|= res;
b41f7df0 EI	298	if (tmp == 0)
	299	flags \|= Z_FLAG;
	300	else if (tmp >> 63)
	301	flags \|= N_FLAG;
	302	if (mof)
	303	flags \|= V_FLAG;
	304
	305	evaluate_flags_writeback(flags);
	306	}
	307
	308	void helper_evaluate_flags_mcp(void)
	309	{
	310	uint32_t src;
	311	uint32_t dst;
	312	uint32_t res;
	313	uint32_t flags = 0;
	314
	315	src = env->cc_src;
	316	dst = env->cc_dest;
	317	res = env->cc_result;
	318
	319	if ((res & 0x80000000L) != 0L)
	320	{
	321	flags \|= N_FLAG;
	322	if (((src & 0x80000000L) == 0L)
	323	&& ((dst & 0x80000000L) == 0L))
	324	{
	325	flags \|= V_FLAG;
	326	}
	327	else if (((src & 0x80000000L) != 0L) &&
	328	((dst & 0x80000000L) != 0L))
	329	{
	330	flags \|= R_FLAG;
	331	}
	332	}
	333	else
	334	{
	335	if (res == 0L)
	336	flags \|= Z_FLAG;
	337	if (((src & 0x80000000L) != 0L)
	338	&& ((dst & 0x80000000L) != 0L))
	339	flags \|= V_FLAG;
	340	if ((dst & 0x80000000L) != 0L
	341	\|\| (src & 0x80000000L) != 0L)
	342	flags \|= R_FLAG;
	343	}
	344
	345	evaluate_flags_writeback(flags);
	346	}
	347
	348	void helper_evaluate_flags_alu_4(void)
	349	{
	350	uint32_t src;
	351	uint32_t dst;
	352	uint32_t res;
	353	uint32_t flags = 0;
	354
	355	src = env->cc_src;
	356	dst = env->cc_dest;
30abcfc7 EI	357
	358	/* Reconstruct the result. */
	359	switch (env->cc_op)
	360	{
	361	case CC_OP_SUB:
	362	res = dst - src;
	363	break;
	364	case CC_OP_ADD:
	365	res = dst + src;
	366	break;
	367	default:
	368	res = env->cc_result;
	369	break;
	370	}
	371
	372	if (env->cc_op == CC_OP_SUB \|\| env->cc_op == CC_OP_CMP)
	373	src = ~src;
b41f7df0 EI	374
	375	if ((res & 0x80000000L) != 0L)
	376	{
	377	flags \|= N_FLAG;
	378	if (((src & 0x80000000L) == 0L)
	379	&& ((dst & 0x80000000L) == 0L))
	380	{
	381	flags \|= V_FLAG;
	382	}
	383	else if (((src & 0x80000000L) != 0L) &&
	384	((dst & 0x80000000L) != 0L))
	385	{
	386	flags \|= C_FLAG;
	387	}
	388	}
	389	else
	390	{
	391	if (res == 0L)
	392	flags \|= Z_FLAG;
	393	if (((src & 0x80000000L) != 0L)
	394	&& ((dst & 0x80000000L) != 0L))
	395	flags \|= V_FLAG;
	396	if ((dst & 0x80000000L) != 0L
	397	\|\| (src & 0x80000000L) != 0L)
	398	flags \|= C_FLAG;
	399	}
	400
	401	if (env->cc_op == CC_OP_SUB
	402	\|\| env->cc_op == CC_OP_CMP) {
	403	flags ^= C_FLAG;
	404	}
	405	evaluate_flags_writeback(flags);
	406	}
	407
	408	void helper_evaluate_flags_move_4 (void)
	409	{
b41f7df0 EI	410	uint32_t res;
	411	uint32_t flags = 0;
	412
b41f7df0 EI	413	res = env->cc_result;
	414
	415	if ((int32_t)res < 0)
	416	flags \|= N_FLAG;
	417	else if (res == 0L)
	418	flags \|= Z_FLAG;
	419
	420	evaluate_flags_writeback(flags);
	421	}
	422	void helper_evaluate_flags_move_2 (void)
	423	{
	424	uint32_t src;
	425	uint32_t flags = 0;
	426	uint16_t res;
	427
	428	src = env->cc_src;
	429	res = env->cc_result;
	430
	431	if ((int16_t)res < 0L)
	432	flags \|= N_FLAG;
	433	else if (res == 0)
	434	flags \|= Z_FLAG;
	435
	436	evaluate_flags_writeback(flags);
	437	}
	438
	439	/* TODO: This is expensive. We could split things up and only evaluate part of
	440	CCR on a need to know basis. For now, we simply re-evaluate everything. */
	441	void helper_evaluate_flags (void)
	442	{
	443	uint32_t src;
	444	uint32_t dst;
	445	uint32_t res;
	446	uint32_t flags = 0;
	447
	448	src = env->cc_src;
	449	dst = env->cc_dest;
	450	res = env->cc_result;
	451
30abcfc7 EI	452	if (env->cc_op == CC_OP_SUB \|\| env->cc_op == CC_OP_CMP)
30abcfc7 EI	453	src = ~src;
b41f7df0 EI	454
	455	/* Now, evaluate the flags. This stuff is based on
	456	Per Zander's CRISv10 simulator. */
	457	switch (env->cc_size)
	458	{
	459	case 1:
	460	if ((res & 0x80L) != 0L)
	461	{
	462	flags \|= N_FLAG;
	463	if (((src & 0x80L) == 0L)
	464	&& ((dst & 0x80L) == 0L))
	465	{
	466	flags \|= V_FLAG;
	467	}
	468	else if (((src & 0x80L) != 0L)
	469	&& ((dst & 0x80L) != 0L))
	470	{
	471	flags \|= C_FLAG;
	472	}
	473	}
	474	else
	475	{
	476	if ((res & 0xFFL) == 0L)
	477	{
	478	flags \|= Z_FLAG;
	479	}
	480	if (((src & 0x80L) != 0L)
	481	&& ((dst & 0x80L) != 0L))
	482	{
	483	flags \|= V_FLAG;
	484	}
	485	if ((dst & 0x80L) != 0L
	486	\|\| (src & 0x80L) != 0L)
	487	{
	488	flags \|= C_FLAG;
	489	}
	490	}
	491	break;
	492	case 2:
	493	if ((res & 0x8000L) != 0L)
	494	{
	495	flags \|= N_FLAG;
	496	if (((src & 0x8000L) == 0L)
	497	&& ((dst & 0x8000L) == 0L))
	498	{
	499	flags \|= V_FLAG;
	500	}
	501	else if (((src & 0x8000L) != 0L)
	502	&& ((dst & 0x8000L) != 0L))
	503	{
	504	flags \|= C_FLAG;
	505	}
	506	}
	507	else
	508	{
	509	if ((res & 0xFFFFL) == 0L)
	510	{
	511	flags \|= Z_FLAG;
	512	}
	513	if (((src & 0x8000L) != 0L)
	514	&& ((dst & 0x8000L) != 0L))
	515	{
	516	flags \|= V_FLAG;
	517	}
518	if ((dst & 0x8000L) != 0L
519	\|\| (src & 0x8000L) != 0L)
520	{
521	flags \|= C_FLAG;
522	}
523	}
524	break;
525	case 4:
526	if ((res & 0x80000000L) != 0L)
527	{
528	flags \|= N_FLAG;
529	if (((src & 0x80000000L) == 0L)
530	&& ((dst & 0x80000000L) == 0L))
531	{
532	flags \|= V_FLAG;
533	}
534	else if (((src & 0x80000000L) != 0L) &&
535	((dst & 0x80000000L) != 0L))
536	{
537	flags \|= C_FLAG;
538	}
539	}
540	else
541	{
542	if (res == 0L)
543	flags \|= Z_FLAG;
544	if (((src & 0x80000000L) != 0L)
545	&& ((dst & 0x80000000L) != 0L))
546	flags \|= V_FLAG;
547	if ((dst & 0x80000000L) != 0L
548	\|\| (src & 0x80000000L) != 0L)
549	flags \|= C_FLAG;
550	}
551	break;
552	default:
553	break;
554	}
555
556	if (env->cc_op == CC_OP_SUB
557	\|\| env->cc_op == CC_OP_CMP) {
558	flags ^= C_FLAG;
559	}
560	evaluate_flags_writeback(flags);
561	}
30abcfc7 EI	562
	563	void helper_top_evaluate_flags(void)
	564	{
	565	switch (env->cc_op)
	566	{
	567	case CC_OP_MCP:
	568	helper_evaluate_flags_mcp();
	569	break;
	570	case CC_OP_MULS:
	571	helper_evaluate_flags_muls();
	572	break;
	573	case CC_OP_MULU:
	574	helper_evaluate_flags_mulu();
	575	break;
	576	case CC_OP_MOVE:
	577	case CC_OP_AND:
	578	case CC_OP_OR:
	579	case CC_OP_XOR:
	580	case CC_OP_ASR:
	581	case CC_OP_LSR:
	582	case CC_OP_LSL:
	583	switch (env->cc_size)
	584	{
	585	case 4:
	586	helper_evaluate_flags_move_4();
	587	break;
	588	case 2:
	589	helper_evaluate_flags_move_2();
	590	break;
	591	default:
	592	helper_evaluate_flags();
	593	break;
	594	}
	595	break;
	596	case CC_OP_FLAGS:
	597	/* live. */
	598	break;
	599	default:
	600	{
	601	switch (env->cc_size)
	602	{
	603	case 4:
	604	helper_evaluate_flags_alu_4();
	605	break;
	606	default:
	607	helper_evaluate_flags();
	608	break;
	609	}
	610	}
	611	break;
	612	}
	613	}