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target-sparc: Use tcg_gen_atomic_xchg_tl

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Backports commit da1bcae65288bdd51e0a7203d1e6c9cde1be5b3d from qemu
This commit is contained in:
Richard Henderson 2018-03-01 08:32:09 -05:00 committed by Lioncash
parent 6b09040e23
commit 47313adedd
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 4 additions and 14 deletions
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18
qemu/target-sparc/translate.c
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@ -2173,29 +2173,19 @@ static inline void gen_ne_fop_QD(DisasContext *dc, int rd, int rs,
static void gen_swap(DisasContext *dc, TCGv dst, TCGv src, static void gen_swap(DisasContext *dc, TCGv dst, TCGv src,
TCGv addr, int mmu_idx, TCGMemOp memop) TCGv addr, int mmu_idx, TCGMemOp memop)
{ {
/* ??? Should be atomic. */
TCGContext *tcg_ctx = dc->uc->tcg_ctx; TCGContext *tcg_ctx = dc->uc->tcg_ctx;
TCGv t0 = tcg_temp_new(tcg_ctx);
gen_address_mask(dc, addr); gen_address_mask(dc, addr);
tcg_gen_qemu_ld_tl(dc->uc, t0, addr, mmu_idx, memop); tcg_gen_atomic_xchg_tl(tcg_ctx, dst, addr, src, mmu_idx, memop);
tcg_gen_qemu_st_tl(dc->uc, src, addr, mmu_idx, memop);
tcg_gen_mov_tl(tcg_ctx, dst, t0);
tcg_temp_free(tcg_ctx, t0);
} }
static void gen_ldstub(DisasContext *dc, TCGv dst, TCGv addr, int mmu_idx) static void gen_ldstub(DisasContext *dc, TCGv dst, TCGv addr, int mmu_idx)
{ {
/* ??? Should be atomic. */
TCGContext *tcg_ctx = dc->uc->tcg_ctx; TCGContext *tcg_ctx = dc->uc->tcg_ctx;
TCGv_i32 t0 = tcg_temp_new_i32(tcg_ctx);
TCGv_i32 t1 = tcg_const_i32(tcg_ctx, 0xff);
TCGv m1 = tcg_const_tl(tcg_ctx, 0xff);
gen_address_mask(dc, addr); gen_address_mask(dc, addr);
tcg_gen_qemu_ld_i32(dc->uc, t0, addr, mmu_idx, MO_UB); tcg_gen_atomic_xchg_tl(tcg_ctx, dst, addr, m1, mmu_idx, MO_UB);
tcg_gen_qemu_st_i32(dc->uc, t1, addr, mmu_idx, MO_UB); tcg_temp_free(tcg_ctx, m1);
tcg_gen_extu_i32_tl(tcg_ctx, dst, t0);
tcg_temp_free_i32(tcg_ctx, t0);
tcg_temp_free_i32(tcg_ctx, t1);
} }
/* asi moves */ /* asi moves */