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sse3: _mm_hsub_pd

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gwenn 2017-09-30 12:12:32 +02:00 • committed by Andrew Gallant
parent 7f84607f16
commit d81d0a4a67
1 changed files with 19 additions and 0 deletions
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19
library/stdarch/src/x86/sse3.rs
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@ -40,6 +40,15 @@ pub unsafe fn _mm_hadd_ps(a: f32x4, b: f32x4) -> f32x4 {
haddps(a, b)
}
/// Horizontally subtract adjacent pairs of double-precision (64-bit)
/// floating-point elements in `a` and `b`, and pack the results.
#[inline(always)]
#[target_feature = "+sse3"]
#[cfg_attr(test, assert_instr(hsub))]
pub unsafe fn _mm_hsub_pd(a: f64x2, b: f64x2) -> f64x2 {
hsubpd(a, b)
}
/// Load 128-bits of integer data from unaligned memory.
/// This intrinsic may perform better than `_mm_loadu_si128`
/// when the data crosses a cache line boundary.
@ -60,6 +69,8 @@ extern {
fn haddpd(a: f64x2, b: f64x2) -> f64x2;
#[link_name = "llvm.x86.sse3.hadd.ps"]
fn haddps(a: f32x4, b: f32x4) -> f32x4;
#[link_name = "llvm.x86.sse3.hsub.pd"]
fn hsubpd(a: f64x2, b: f64x2) -> f64x2;
#[link_name = "llvm.x86.sse3.ldu.dq"]
fn lddqu(mem_addr: *const i8) -> __m128i;
}
@ -104,6 +115,14 @@ mod tests {
assert_eq!(r, f32x4::new(4.0, -10.0, -80.0, -5.0));
}
#[simd_test = "sse3"]
unsafe fn _mm_hsub_pd() {
let a = f64x2::new(-1.0, 5.0);
let b = f64x2::new(-100.0, 20.0);
let r = sse3::_mm_hsub_pd(a, b);
assert_eq!(r, f64x2::new(-6.0, -120.0));
}
#[simd_test = "sse3"]
unsafe fn _mm_lddqu_si128() {
let a = i8x16::new(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);