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sse3: _mm_addsub_ps

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gwenn 2017-09-30 11:42:49 +02:00 • committed by Andrew Gallant
parent b5a28bad22
commit fff98467f3
1 changed files with 20 additions and 0 deletions
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20
library/stdarch/src/x86/sse3.rs
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@ -1,8 +1,18 @@
use x86::__m128i;
use v128::f32x4;
#[cfg(test)]
use stdsimd_test::assert_instr;
/// Alternatively add and subtract packed single-precision (32-bit)
/// floating-point elements in `a` to/from packed elements in `b`.
#[inline(always)]
#[target_feature = "+sse3"]
#[cfg_attr(test, assert_instr(addsub))]
pub unsafe fn _mm_addsub_ps(a: f32x4, b: f32x4) -> f32x4 {
addsubps(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.
@ -15,6 +25,8 @@ pub unsafe fn _mm_lddqu_si128(mem_addr: *const __m128i) -> __m128i {
#[allow(improper_ctypes)]
extern {
#[link_name = "llvm.x86.sse3.addsub.ps"]
fn addsubps(a: f32x4, b: f32x4) -> f32x4;
#[link_name = "llvm.x86.sse3.ldu.dq"]
fn lddqu(mem_addr: *const i8) -> __m128i;
}
@ -27,6 +39,14 @@ mod tests {
use v128::*;
use x86::sse3 as sse3;
#[simd_test = "sse3"]
unsafe fn _mm_addsub_ps() {
let a = f32x4::new(-1.0, 5.0, 0.0, -10.0);
let b = f32x4::new(-100.0, 20.0, 0.0, -5.0);
let r = sse3::_mm_addsub_ps(a, b);
assert_eq!(r, f32x4::new(99.0, 25.0, 0.0, -15.0));
}
#[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);