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tcg/ppc: Optimize memory ordering generation with lwsync 

lwsync orders more than just LD_LD, importantly it matches x86 and
s390 default memory ordering.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220519135908.21282-4-npiggin@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Nicholas Piggin 2022-05-19 23:59:07 +10:00 committed by Daniel Henrique Barboza
parent 9d82353826
commit fc879703f7
1 changed files with 6 additions and 3 deletions
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9
tcg/ppc/tcg-target.c.inc
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@ -1832,11 +1832,14 @@ static void tcg_out_brcond2 (TCGContext *s, const TCGArg *args,
static void tcg_out_mb(TCGContext *s, TCGArg a0)
{
uint32_t insn = HWSYNC;
a0 &= TCG_MO_ALL;
if (a0 == TCG_MO_LD_LD) {
uint32_t insn;
if (a0 & TCG_MO_ST_LD) {
insn = HWSYNC;
} else {
insn = LWSYNC;
}
tcg_out32(s, insn);
}