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target/i386: Fix BZHI instruction

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We did not correctly handle N >= operand size.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1374
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230114233206.3118472-1-richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Richard Henderson 2023-01-14 13:32:06 -10:00 • committed by Paolo Bonzini
parent 1270a3f57c
commit 9ad2ba6e8e
2 changed files with 10 additions and 7 deletions
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3
tests/tcg/i386/test-i386-bmi2.c
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@ -123,6 +123,9 @@ int main(int argc, char *argv[]) {
result = bzhiq(mask, 0x1f);
assert(result == (mask & ~(-1 << 30)));
result = bzhiq(mask, 0x40);
assert(result == mask);
result = rorxq(0x2132435465768798, 8);
assert(result == 0x9821324354657687);