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sse3: _mm_hadd_pd

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gwenn 2017-09-30 12:01:35 +02:00 • committed by Andrew Gallant
parent dc684dc221
commit fbd3416f0c
1 changed files with 19 additions and 0 deletions
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19
library/stdarch/src/x86/sse3.rs
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@ -22,6 +22,15 @@ pub unsafe fn _mm_addsub_pd(a: f64x2, b: f64x2) -> f64x2 {
addsubpd(a, b)
}
/// Horizontally add 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(hadd))]
pub unsafe fn _mm_hadd_pd(a: f64x2, b: f64x2) -> f64x2 {
haddpd(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.
@ -38,6 +47,8 @@ extern {
fn addsubps(a: f32x4, b: f32x4) -> f32x4;
#[link_name = "llvm.x86.sse3.addsub.pd"]
fn addsubpd(a: f64x2, b: f64x2) -> f64x2;
#[link_name = "llvm.x86.sse3.hadd.pd"]
fn haddpd(a: f64x2, b: f64x2) -> f64x2;
#[link_name = "llvm.x86.sse3.ldu.dq"]
fn lddqu(mem_addr: *const i8) -> __m128i;
}
@ -66,6 +77,14 @@ mod tests {
assert_eq!(r, f64x2::new(99.0, 25.0));
}
#[simd_test = "sse3"]
unsafe fn _mm_hadd_pd() {
let a = f64x2::new(-1.0, 5.0);
let b = f64x2::new(-100.0, 20.0);
let r = sse3::_mm_hadd_pd(a, b);
assert_eq!(r, f64x2::new(4.0, -80.0));
}
#[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);