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Merge pull request #55 from AdamNiederer/addps

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Add vaddsubps
This commit is contained in:
Alex Crichton 2017-09-26 22:10:21 -05:00 • committed by GitHub
commit fbcf876ce0
1 changed files with 21 additions and 1 deletions
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22
library/stdarch/src/x86/avx.rs
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@ -43,6 +43,15 @@ pub fn _mm256_addsub_pd(a: f64x4, b: f64x4) -> f64x4 {
unsafe { addsubpd256(a, b) }
}
/// Alternatively add and subtract packed single-precision (32-bit)
/// floating-point elements in `a` to/from packed elements in `b`.
#[inline(always)]
#[target_feature = "+avx"]
#[cfg_attr(test, assert_instr(vaddsubps))]
pub fn _mm256_addsub_ps(a: f32x8, b: f32x8) -> f32x8 {
unsafe { addsubps256(a, b) }
}
/// Subtract packed double-precision (64-bit) floating-point elements in `b`
/// from packed elements in `a`.
#[inline(always)]
@ -110,6 +119,8 @@ pub fn _mm256_floor_pd(a: f64x4) -> f64x4 {
extern "C" {
#[link_name = "llvm.x86.avx.addsub.pd.256"]
fn addsubpd256(a: f64x4, b: f64x4) -> f64x4;
#[link_name = "llvm.x86.avx.addsub.ps.256"]
fn addsubps256(a: f32x8, b: f32x8) -> f32x8;
#[link_name = "llvm.x86.avx.round.pd.256"]
fn roundpd256(a: f64x4, b: i32) -> f64x4;
}
@ -162,7 +173,16 @@ mod tests {
let a = f64x4::new(1.0, 2.0, 3.0, 4.0);
let b = f64x4::new(5.0, 6.0, 7.0, 8.0);
let r = avx::_mm256_addsub_pd(a, b);
let e = f64x4::new(-4.0,8.0,-4.0,12.0);
let e = f64x4::new(-4.0, 8.0, -4.0, 12.0);
assert_eq!(r, e);
}
#[simd_test = "avx"]
fn _mm256_addsub_ps() {
let a = f32x8::new(1.0, 2.0, 3.0, 4.0, 1.0, 2.0, 3.0, 4.0);
let b = f32x8::new(5.0, 6.0, 7.0, 8.0, 5.0, 6.0, 7.0, 8.0);
let r = avx::_mm256_addsub_ps(a, b);
let e = f32x8::new(-4.0, 8.0, -4.0, 12.0, -4.0, 8.0, -4.0, 12.0);
assert_eq!(r, e);
}