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target/loongarch: Fix qemu-loongarch64 hang when executing 'll.d $t0, $t0, 0' 

On gen_ll, if a->imm is zero, make_address_x return src1,
but the load to destination may clobber src1. We use a new
destination to fix this problem.

Fixes: c5af6628f4 (target/loongarch: Extract make_address_i() helper)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20240320013955.1561311-1-gaosong@loongson.cn>
This commit is contained in:
Song Gao 2024-03-20 09:39:55 +08:00
parent 9c70db9a43
commit 77642f92c0
1 changed files with 4 additions and 4 deletions
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8
target/loongarch/tcg/insn_trans/trans_atomic.c.inc
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@ -5,14 +5,14 @@
static bool gen_ll(DisasContext *ctx, arg_rr_i *a, MemOp mop)
{
TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE);
TCGv t1 = tcg_temp_new();
TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE);
TCGv t0 = make_address_i(ctx, src1, a->imm);
tcg_gen_qemu_ld_i64(dest, t0, ctx->mem_idx, mop);
tcg_gen_qemu_ld_i64(t1, t0, ctx->mem_idx, mop);
tcg_gen_st_tl(t0, tcg_env, offsetof(CPULoongArchState, lladdr));
tcg_gen_st_tl(dest, tcg_env, offsetof(CPULoongArchState, llval));
gen_set_gpr(a->rd, dest, EXT_NONE);
tcg_gen_st_tl(t1, tcg_env, offsetof(CPULoongArchState, llval));
gen_set_gpr(a->rd, t1, EXT_NONE);
return true;
}