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target-mips: generate fences 

Make use of memory barrier TCG opcode in MIPS front end.

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Leon Alrae 2016-09-08 11:01:01 +01:00
parent e9deaad8a5
commit d208ac0c2e
1 changed files with 30 additions and 2 deletions
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32
target-mips/translate.c
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@ -13109,6 +13109,34 @@ static void gen_ldst_pair (DisasContext *ctx, uint32_t opc, int rd,
tcg_temp_free(t1);
}
static void gen_sync(int stype)
{
TCGBar tcg_mo = TCG_BAR_SC;
switch (stype) {
case 0x4: /* SYNC_WMB */
tcg_mo |= TCG_MO_ST_ST;
break;
case 0x10: /* SYNC_MB */
tcg_mo |= TCG_MO_ALL;
break;
case 0x11: /* SYNC_ACQUIRE */
tcg_mo |= TCG_MO_LD_LD | TCG_MO_LD_ST;
break;
case 0x12: /* SYNC_RELEASE */
tcg_mo |= TCG_MO_ST_ST | TCG_MO_LD_ST;
break;
case 0x13: /* SYNC_RMB */
tcg_mo |= TCG_MO_LD_LD;
break;
default:
tcg_mo |= TCG_MO_ALL;
break;
}
tcg_gen_mb(tcg_mo);
}
static void gen_pool32axf (CPUMIPSState *env, DisasContext *ctx, int rt, int rs)
{
int extension = (ctx->opcode >> 6) & 0x3f;
@ -13384,7 +13412,7 @@ static void gen_pool32axf (CPUMIPSState *env, DisasContext *ctx, int rt, int rs)
case 0x2d:
switch (minor) {
case SYNC:
/* NOP */
gen_sync(extract32(ctx->opcode, 16, 5));
break;
case SYSCALL:
generate_exception_end(ctx, EXCP_SYSCALL);
@ -17201,7 +17229,7 @@ static void decode_opc_special(CPUMIPSState *env, DisasContext *ctx)
break;
case OPC_SYNC:
check_insn(ctx, ISA_MIPS2);
/* Treat as NOP. */
gen_sync(extract32(ctx->opcode, 6, 5));
break;
#if defined(TARGET_MIPS64)