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CRIS: Restructure the translator to allow for better code generation.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4594 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
edgar_igl 2008-05-27 21:10:56 +00:00
parent 9bcd77d6b1
commit 30abcfc7ba
5 changed files with 545 additions and 387 deletions
Download patch file Download diff file Expand all files Collapse all files

93
target-cris/op_helper.c
View file

@ -22,6 +22,7 @@
#include <assert.h>
#include "exec.h"
#include "mmu.h"
#include "helper.h"
#define MMUSUFFIX _mmu
@ -67,6 +68,9 @@ void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
/* 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();
@ -87,12 +91,7 @@ void helper_tlb_flush_pid(uint32_t pid)
#endif
}
void helper_tlb_flush(void)
{
tlb_flush(env, 1);
}
void helper_dump(uint32_t a0, uint32_t a1)
void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
{
(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1));
}
@ -236,13 +235,7 @@ 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;
x = env->cc_x;
if ((x || env->cc_op == CC_OP_ADDC)
&& flags & Z_FLAG)
env->cc_mask &= ~Z_FLAG;
@ -359,7 +352,23 @@ void helper_evaluate_flags_alu_4(void)
src = env->cc_src;
dst = env->cc_dest;
res = env->cc_result;
/* 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)
{
@ -396,11 +405,9 @@ void helper_evaluate_flags_alu_4(void)
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)
@ -440,6 +447,8 @@ void helper_evaluate_flags (void)
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. */
@ -548,3 +557,55 @@ void helper_evaluate_flags (void)
}
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;
}
}