From: Richard Henderson Date: Wed, 1 Jul 2020 16:28:15 +0000 (-0700) Subject: tcg: Fix do_nonatomic_op_* vs signed operations X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=852f933e482518797f7785a2e017a215b88df815;p=qemu.git tcg: Fix do_nonatomic_op_* vs signed operations The smin/smax/umin/umax operations require the operands to be properly sign extended. Do not drop the MO_SIGN bit from the load, and additionally extend the val input. Reviewed-by: LIU Zhiwei Reported-by: LIU Zhiwei Signed-off-by: Richard Henderson Message-Id: <20200701165646.1901320-1-richard.henderson@linaro.org> --- diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index e60b74fb82..4b8a473fad 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -3189,8 +3189,9 @@ static void do_nonatomic_op_i32(TCGv_i32 ret, TCGv addr, TCGv_i32 val, memop = tcg_canonicalize_memop(memop, 0, 0); - tcg_gen_qemu_ld_i32(t1, addr, idx, memop & ~MO_SIGN); - gen(t2, t1, val); + tcg_gen_qemu_ld_i32(t1, addr, idx, memop); + tcg_gen_ext_i32(t2, val, memop); + gen(t2, t1, t2); tcg_gen_qemu_st_i32(t2, addr, idx, memop); tcg_gen_ext_i32(ret, (new_val ? t2 : t1), memop); @@ -3232,8 +3233,9 @@ static void do_nonatomic_op_i64(TCGv_i64 ret, TCGv addr, TCGv_i64 val, memop = tcg_canonicalize_memop(memop, 1, 0); - tcg_gen_qemu_ld_i64(t1, addr, idx, memop & ~MO_SIGN); - gen(t2, t1, val); + tcg_gen_qemu_ld_i64(t1, addr, idx, memop); + tcg_gen_ext_i64(t2, val, memop); + gen(t2, t1, t2); tcg_gen_qemu_st_i64(t2, addr, idx, memop); tcg_gen_ext_i64(ret, (new_val ? t2 : t1), memop);