* [Qemu-devel] [5547] CRIS: Avoid using cpu_T[0] for testing condition codes.
@ 2008-10-27 13:52 Edgar E. Iglesias
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From: Edgar E. Iglesias @ 2008-10-27 13:52 UTC (permalink / raw)
To: qemu-devel
Revision: 5547
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5547
Author: edgar_igl
Date: 2008-10-27 13:52:44 +0000 (Mon, 27 Oct 2008)
Log Message:
-----------
CRIS: Avoid using cpu_T[0] for testing condition codes.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Modified Paths:
--------------
trunk/target-cris/translate.c
Modified: trunk/target-cris/translate.c
===================================================================
--- trunk/target-cris/translate.c 2008-10-27 12:39:30 UTC (rev 5546)
+++ trunk/target-cris/translate.c 2008-10-27 13:52:44 UTC (rev 5547)
@@ -973,7 +973,7 @@
return 0;
}
-static void gen_tst_cc (DisasContext *dc, int cond)
+static void gen_tst_cc (DisasContext *dc, TCGv cc, int cond)
{
int arith_opt, move_opt;
@@ -996,46 +996,46 @@
non-zero otherwise T0 should be zero. */
int l1;
l1 = gen_new_label();
- tcg_gen_movi_tl(cpu_T[0], 0);
+ tcg_gen_movi_tl(cc, 0);
tcg_gen_brcondi_tl(TCG_COND_NE, cc_result,
0, l1);
- tcg_gen_movi_tl(cpu_T[0], 1);
+ tcg_gen_movi_tl(cc, 1);
gen_set_label(l1);
}
else {
cris_evaluate_flags(dc);
- tcg_gen_andi_tl(cpu_T[0],
+ tcg_gen_andi_tl(cc,
cpu_PR[PR_CCS], Z_FLAG);
}
break;
case CC_NE:
if (arith_opt || move_opt)
- tcg_gen_mov_tl(cpu_T[0], cc_result);
+ tcg_gen_mov_tl(cc, cc_result);
else {
cris_evaluate_flags(dc);
- tcg_gen_xori_tl(cpu_T[0], cpu_PR[PR_CCS],
+ tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
Z_FLAG);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], Z_FLAG);
+ tcg_gen_andi_tl(cc, cc, Z_FLAG);
}
break;
case CC_CS:
cris_evaluate_flags(dc);
- tcg_gen_andi_tl(cpu_T[0], cpu_PR[PR_CCS], C_FLAG);
+ tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], C_FLAG);
break;
case CC_CC:
cris_evaluate_flags(dc);
- tcg_gen_xori_tl(cpu_T[0], cpu_PR[PR_CCS], C_FLAG);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], C_FLAG);
+ tcg_gen_xori_tl(cc, cpu_PR[PR_CCS], C_FLAG);
+ tcg_gen_andi_tl(cc, cc, C_FLAG);
break;
case CC_VS:
cris_evaluate_flags(dc);
- tcg_gen_andi_tl(cpu_T[0], cpu_PR[PR_CCS], V_FLAG);
+ tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], V_FLAG);
break;
case CC_VC:
cris_evaluate_flags(dc);
- tcg_gen_xori_tl(cpu_T[0], cpu_PR[PR_CCS],
+ tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
V_FLAG);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], V_FLAG);
+ tcg_gen_andi_tl(cc, cc, V_FLAG);
break;
case CC_PL:
if (arith_opt || move_opt) {
@@ -1046,13 +1046,13 @@
else if (dc->cc_size == 2)
bits = 15;
- tcg_gen_shri_tl(cpu_T[0], cc_result, bits);
- tcg_gen_xori_tl(cpu_T[0], cpu_T[0], 1);
+ tcg_gen_shri_tl(cc, cc_result, bits);
+ tcg_gen_xori_tl(cc, cc, 1);
} else {
cris_evaluate_flags(dc);
- tcg_gen_xori_tl(cpu_T[0], cpu_PR[PR_CCS],
+ tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
N_FLAG);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], N_FLAG);
+ tcg_gen_andi_tl(cc, cc, N_FLAG);
}
break;
case CC_MI:
@@ -1064,17 +1064,17 @@
else if (dc->cc_size == 2)
bits = 15;
- tcg_gen_shri_tl(cpu_T[0], cc_result, 31);
+ tcg_gen_shri_tl(cc, cc_result, 31);
}
else {
cris_evaluate_flags(dc);
- tcg_gen_andi_tl(cpu_T[0], cpu_PR[PR_CCS],
+ tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
N_FLAG);
}
break;
case CC_LS:
cris_evaluate_flags(dc);
- tcg_gen_andi_tl(cpu_T[0], cpu_PR[PR_CCS],
+ tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
C_FLAG | Z_FLAG);
break;
case CC_HI:
@@ -1086,9 +1086,9 @@
tcg_gen_xori_tl(tmp, cpu_PR[PR_CCS],
C_FLAG | Z_FLAG);
/* Overlay the C flag on top of the Z. */
- tcg_gen_shli_tl(cpu_T[0], tmp, 2);
- tcg_gen_and_tl(cpu_T[0], tmp, cpu_T[0]);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], Z_FLAG);
+ tcg_gen_shli_tl(cc, tmp, 2);
+ tcg_gen_and_tl(cc, tmp, cc);
+ tcg_gen_andi_tl(cc, cc, Z_FLAG);
tcg_temp_free(tmp);
}
@@ -1096,19 +1096,19 @@
case CC_GE:
cris_evaluate_flags(dc);
/* Overlay the V flag on top of the N. */
- tcg_gen_shli_tl(cpu_T[0], cpu_PR[PR_CCS], 2);
- tcg_gen_xor_tl(cpu_T[0],
- cpu_PR[PR_CCS], cpu_T[0]);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], N_FLAG);
- tcg_gen_xori_tl(cpu_T[0], cpu_T[0], N_FLAG);
+ tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
+ tcg_gen_xor_tl(cc,
+ cpu_PR[PR_CCS], cc);
+ tcg_gen_andi_tl(cc, cc, N_FLAG);
+ tcg_gen_xori_tl(cc, cc, N_FLAG);
break;
case CC_LT:
cris_evaluate_flags(dc);
/* Overlay the V flag on top of the N. */
- tcg_gen_shli_tl(cpu_T[0], cpu_PR[PR_CCS], 2);
- tcg_gen_xor_tl(cpu_T[0],
- cpu_PR[PR_CCS], cpu_T[0]);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], N_FLAG);
+ tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
+ tcg_gen_xor_tl(cc,
+ cpu_PR[PR_CCS], cc);
+ tcg_gen_andi_tl(cc, cc, N_FLAG);
break;
case CC_GT:
cris_evaluate_flags(dc);
@@ -1127,8 +1127,8 @@
tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
tcg_gen_xori_tl(n, n, 2);
- tcg_gen_and_tl(cpu_T[0], z, n);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 2);
+ tcg_gen_and_tl(cc, z, n);
+ tcg_gen_andi_tl(cc, cc, 2);
tcg_temp_free(n);
tcg_temp_free(z);
@@ -1148,8 +1148,8 @@
tcg_gen_shri_tl(z, cpu_PR[PR_CCS], 1);
tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
- tcg_gen_or_tl(cpu_T[0], z, n);
- tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 2);
+ tcg_gen_or_tl(cc, z, n);
+ tcg_gen_andi_tl(cc, cc, 2);
tcg_temp_free(n);
tcg_temp_free(z);
@@ -1157,10 +1157,10 @@
break;
case CC_P:
cris_evaluate_flags(dc);
- tcg_gen_andi_tl(cpu_T[0], cpu_PR[PR_CCS], P_FLAG);
+ tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], P_FLAG);
break;
case CC_A:
- tcg_gen_movi_tl(cpu_T[0], 1);
+ tcg_gen_movi_tl(cc, 1);
break;
default:
BUG();
@@ -1188,8 +1188,7 @@
if (cond != CC_A)
{
dc->jmp = JMP_INDIRECT;
- gen_tst_cc (dc, cond);
- tcg_gen_mov_tl(env_btaken, cpu_T[0]);
+ gen_tst_cc (dc, env_btaken, cond);
tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
} else {
/* Allow chaining. */
@@ -1623,11 +1622,9 @@
{
int l1;
- gen_tst_cc (dc, cond);
-
+ gen_tst_cc (dc, cpu_R[dc->op1], cond);
l1 = gen_new_label();
- tcg_gen_movi_tl(cpu_R[dc->op1], 0);
- tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_T[0], 0, l1);
+ tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_R[dc->op1], 0, l1);
tcg_gen_movi_tl(cpu_R[dc->op1], 1);
gen_set_label(l1);
}
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