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Optimize SSE2 Float floor and ceil #85

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Optimize SSE2 Float floor and ceil #85

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fc78a7d
simd floor and ceil for floats
austinorr Mar 16, 2026
ae384ba
match self call pattern from fast_round
austinorr Mar 17, 2026
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24 changes: 8 additions & 16 deletions src/ops/f32.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -363,14 +363,10 @@ impl_op! {
_mm_round_ps(a, _MM_FROUND_TO_NEG_INF | _MM_FROUND_NO_EXC)
}
for Sse2(a: __m128) -> __m128 {
let nums_arr = core::mem::transmute::<__m128, [f32; 4]>(a);
let ceil = [
nums_arr[0].m_floor(),
nums_arr[1].m_floor(),
nums_arr[2].m_floor(),
nums_arr[3].m_floor(),
];
core::mem::transmute::<[f32; 4], __m128>(ceil)
let rounded = Self::round(a);
let mask = _mm_cmpgt_ps(rounded, a);
let one = _mm_and_ps(mask, _mm_set1_ps(1.0));
_mm_sub_ps(rounded, one)
}
for Scalar(a: f32) -> f32 {
a.m_floor()
Expand All @@ -393,14 +389,10 @@ impl_op! {
_mm_round_ps(a, _MM_FROUND_TO_POS_INF | _MM_FROUND_NO_EXC)
}
for Sse2(a: __m128) -> __m128 {
let nums_arr = core::mem::transmute::<__m128, [f32; 4]>(a);
let ceil = [
nums_arr[0].m_ceil(),
nums_arr[1].m_ceil(),
nums_arr[2].m_ceil(),
nums_arr[3].m_ceil(),
];
core::mem::transmute::<[f32; 4], __m128>(ceil)
let rounded = Self::round(a);
let mask = _mm_cmplt_ps(rounded, a);
let one = _mm_and_ps(mask, _mm_set1_ps(1.0));
_mm_add_ps(rounded, one)
}
for Scalar(a: f32) -> f32 {
a.m_ceil()
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20 changes: 8 additions & 12 deletions src/ops/f64.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -345,12 +345,10 @@ impl_op! {
_mm_round_pd(a, _MM_FROUND_TO_NEG_INF | _MM_FROUND_NO_EXC)
}
for Sse2(a: __m128d) -> __m128d {
let nums_arr = core::mem::transmute::<__m128d, [f64; 2]>(a);
let ceil = [
nums_arr[0].m_floor(),
nums_arr[1].m_floor(),
];
core::mem::transmute::<[f64; 2], __m128d>(ceil)
let rounded = Self::round(a);
let mask = _mm_cmpgt_pd(rounded, a);
let one = _mm_and_pd(mask, _mm_set1_pd(1.0));
_mm_sub_pd(rounded, one)
}
for Scalar(a: f64) -> f64 {
a.m_floor()
Expand All @@ -373,12 +371,10 @@ impl_op! {
_mm_round_pd(a, _MM_FROUND_TO_POS_INF | _MM_FROUND_NO_EXC)
}
for Sse2(a: __m128d) -> __m128d {
let nums_arr = core::mem::transmute::<__m128d, [f64; 2]>(a);
let ceil = [
nums_arr[0].m_ceil(),
nums_arr[1].m_ceil(),
];
core::mem::transmute::<[f64; 2], __m128d>(ceil)
let rounded = Self::round(a);
let mask = _mm_cmplt_pd(rounded, a);
let one = _mm_and_pd(mask, _mm_set1_pd(1.0));
_mm_add_pd(rounded, one)
}
for Scalar(a: f64) -> f64 {
a.m_ceil()
Expand Down
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