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Avoid clobbering input/aliased registers in !SOFTMMU+64bit+bswap case 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5033 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
malc 2008-08-20 22:39:19 +00:00
parent 0b7c1d897f
commit 109719ec9e
1 changed files with 10 additions and 9 deletions
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19
tcg/ppc64/tcg-target.c
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@ -579,9 +579,9 @@ static void tcg_out_tlb_read (TCGContext *s, int r0, int r1, int r2,
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 @@ static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)
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 @@ static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)
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 @@ static void tcg_out_qemu_st (TCGContext *s, const TCGArg *args, int opc)
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;