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Extend _mm_maddubs_epi16 test to check widening and saturating behavior

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Eduardo Sánchez Muñoz 2023-10-16 18:54:57 +02:00 • committed by Amanieu d'Antras
parent c07535ca79
commit e8d5cbd60f
1 changed files with 21 additions and 0 deletions
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21
library/stdarch/crates/core_arch/src/x86/ssse3.rs
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@ -568,6 +568,27 @@ mod tests {
let expected = _mm_setr_epi16(130, 24, 192, 194, 158, 175, 66, 120);
let r = _mm_maddubs_epi16(a, b);
assert_eq_m128i(r, expected);
// Test widening and saturation
#[rustfmt::skip]
let a = _mm_setr_epi8(
u8::MAX as i8, u8::MAX as i8,
u8::MAX as i8, u8::MAX as i8,
u8::MAX as i8, u8::MAX as i8,
100, 100, 0, 0,
0, 0, 0, 0, 0, 0,
);
#[rustfmt::skip]
let b = _mm_setr_epi8(
i8::MAX, i8::MAX,
i8::MAX, i8::MIN,
i8::MIN, i8::MIN,
50, 15, 0, 0, 0,
0, 0, 0, 0, 0,
);
let expected = _mm_setr_epi16(i16::MAX, -255, i16::MIN, 6500, 0, 0, 0, 0);
let r = _mm_maddubs_epi16(a, b);
assert_eq_m128i(r, expected);
}
#[simd_test(enable = "ssse3")]