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[Qemu-devel] [5033] Avoid clobbering input/ aliased registers in !SOFTMM
From: |
malc |
Subject: |
[Qemu-devel] [5033] Avoid clobbering input/ aliased registers in !SOFTMMU+64bit+bswap case |
Date: |
Wed, 20 Aug 2008 22:39:20 +0000 |
Revision: 5033
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5033
Author: malc
Date: 2008-08-20 22:39:19 +0000 (Wed, 20 Aug 2008)
Log Message:
-----------
Avoid clobbering input/aliased registers in !SOFTMMU+64bit+bswap case
Modified Paths:
--------------
trunk/tcg/ppc64/tcg-target.c
Modified: trunk/tcg/ppc64/tcg-target.c
===================================================================
--- trunk/tcg/ppc64/tcg-target.c 2008-08-20 22:39:17 UTC (rev 5032)
+++ trunk/tcg/ppc64/tcg-target.c 2008-08-20 22:39:19 UTC (rev 5033)
@@ -579,9 +579,9 @@
static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)
{
- int addr_reg, data_reg, r0, mem_index, s_bits, bswap;
+ int addr_reg, data_reg, r0, r1, mem_index, s_bits, bswap;
#ifdef CONFIG_SOFTMMU
- int r1, r2;
+ int r2;
void *label1_ptr, *label2_ptr;
#endif
@@ -653,6 +653,7 @@
tcg_out_rld (s, RLDICL, addr_reg, addr_reg, 0, 32);
#endif
r0 = addr_reg;
+ r1 = 4;
#endif
#ifdef TARGET_WORDS_BIGENDIAN
@@ -693,11 +694,11 @@
break;
case 3:
if (bswap) {
- tcg_out32 (s, LWBRX | RT (data_reg) | RB (r0));
- tcg_out32 (s, ADDI | RT (r0) | RA (r0) | 4);
- tcg_out32 (s, LWBRX | RT (r0) | RB (r0));
- tcg_out_rld (s, RLDICR, r0, r0, 32, 31);
- tcg_out32 (s, OR | SAB (r0, data_reg, data_reg));
+ tcg_out32 (s, LWBRX | RT (0) | RB (r0));
+ tcg_out32 (s, ADDI | RT (r1) | RA (r0) | 4);
+ tcg_out32 (s, LWBRX | RT (data_reg) | RB (r1));
+ tcg_out_rld (s, RLDICR, data_reg, data_reg, 32, 31);
+ tcg_out32 (s, OR | SAB (0, data_reg, data_reg));
}
else tcg_out32 (s, LD | RT (data_reg) | RA (r0));
break;
@@ -788,9 +789,9 @@
case 3:
if (bswap) {
tcg_out32 (s, STWBRX | RS (data_reg) | RA (0) | RB (r0));
- tcg_out32 (s, ADDI | RT (r0) | RA (r0) | 4);
+ tcg_out32 (s, ADDI | RT (r1) | RA (r0) | 4);
tcg_out_rld (s, RLDICL, 0, data_reg, 32, 0);
- tcg_out32 (s, STWBRX | RS (0) | RA (0) | RB (r0));
+ tcg_out32 (s, STWBRX | RS (0) | RA (0) | RB (r1));
}
else tcg_out32 (s, STD | RS (data_reg) | RA (r0));
break;
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