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| author | Richard Henderson <richard.henderson@linaro.org> | 2025-08-27 20:33:27 +1000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2025-09-04 09:49:23 +0200 |
| commit | 26c41cc4a3d998caa700407a27e18755a6e1895c (patch) | |
| tree | 1a3732110bdfd83536acfb41f554ab1c56cf86b3 | |
| parent | b8eb3dd49583729edceb18628e626eac15a15de4 (diff) | |
| download | qemu-26c41cc4a3d998caa700407a27e18755a6e1895c.zip qemu-26c41cc4a3d998caa700407a27e18755a6e1895c.tar.gz qemu-26c41cc4a3d998caa700407a27e18755a6e1895c.tar.bz2 | |
tcg/i386: Expand sari of bits-1 as pcmpgt
Expand arithmetic right shift of bits-1 as a comparison vs 0.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| -rw-r--r-- | tcg/i386/tcg-target.c.inc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc index 088c6c9..4cd5d42 100644 --- a/tcg/i386/tcg-target.c.inc +++ b/tcg/i386/tcg-target.c.inc @@ -4357,6 +4357,12 @@ static void expand_vec_sari(TCGType type, unsigned vece, { TCGv_vec t1, t2; + if (imm >= (8 << vece) - 1) { + tcg_gen_cmp_vec(TCG_COND_LT, vece, v0, v1, + tcg_constant_vec(type, MO_64, 0)); + return; + } + switch (vece) { case MO_8: /* Unpack to 16-bit, shift, and repack. */ |