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tcg-sparc: Fix qemu_st for 32-bit 

The datalo variable is still live in the miss path.  Use another
when reconstructing the full data value.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Richard Henderson 2012-10-10 09:02:39 -07:00 committed by Blue Swirl
parent dda73c782f
commit a7a49843d7
1 changed files with 4 additions and 3 deletions
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7
tcg/sparc/tcg-target.c
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@ -985,7 +985,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int sizeop)
{
int addrlo_idx = 1, datalo, datahi, addr_reg;
#if defined(CONFIG_SOFTMMU)
int memi_idx, memi, n;
int memi_idx, memi, n, datafull;
uint32_t *label_ptr;
#endif
@ -1002,12 +1002,13 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int sizeop)
addr_reg = tcg_out_tlb_load(s, addrlo_idx, memi, sizeop, args,
offsetof(CPUTLBEntry, addr_write));
datafull = datalo;
if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {
/* Reconstruct the full 64-bit value. */
tcg_out_arithi(s, TCG_REG_T1, datalo, 0, SHIFT_SRL);
tcg_out_arithi(s, TCG_REG_O2, datahi, 32, SHIFT_SLLX);
tcg_out_arith(s, TCG_REG_O2, TCG_REG_T1, TCG_REG_O2, ARITH_OR);
datalo = TCG_REG_O2;
datafull = TCG_REG_O2;
}
/* The fast path is exactly one insn. Thus we can perform the entire
@ -1018,7 +1019,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int sizeop)
| ((TARGET_LONG_BITS == 64) << 21)
| (1 << 29) | (1 << 19)));
/* delay slot */
tcg_out_ldst_rr(s, datalo, addr_reg, TCG_REG_O1, qemu_st_opc[sizeop]);
tcg_out_ldst_rr(s, datafull, addr_reg, TCG_REG_O1, qemu_st_opc[sizeop]);
/* TLB Miss. */