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target/arm: Fix sign-extension for SMLAL*

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The 32-bit product should be sign-extended, not zero-extended.

Fixes: ea96b37

Backports commit 1ab170865202aab8301131f31bffd87ea0f60d16 from qemu
This commit is contained in:
Richard Henderson 2020-03-21 11:32:58 -04:00 committed by Lioncash
parent 0d0d054382
commit fb1988190e
1 changed files with 2 additions and 1 deletions
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3
qemu/target/arm/translate.c
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@ -8335,7 +8335,8 @@ static bool op_smlaxxx(DisasContext *s, arg_rrrr *a,
case 2:
tl = load_reg(s, a->ra);
th = load_reg(s, a->rd);
t1 = tcg_const_i32(tcg_ctx, 0);
t1 = tcg_temp_new_i32(tcg_ctx);
tcg_gen_sari_i32(tcg_ctx, t1, t0, 31);
tcg_gen_add2_i32(tcg_ctx, tl, th, tl, th, t0, t1);
tcg_temp_free_i32(tcg_ctx, t0);
tcg_temp_free_i32(tcg_ctx, t1);