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Add multiply add saturated

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Luca Barbato 2018-05-18 21:28:19 +00:00 committed by gnzlbg
parent 0f4ea30683
commit a1955afb47
1 changed files with 22 additions and 0 deletions
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22
library/stdarch/coresimd/powerpc/altivec.rs
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@ -362,6 +362,8 @@ impl_from_bits_!(
extern "C" {
#[ link_name = "llvm.ppc.altivec.vperm" ]
fn vperm(a: vector_signed_int, b: vector_signed_int, c: vector_unsigned_char) -> vector_signed_int;
#[ link_name = "llvm.ppc.altivec.vmhaddshs" ]
fn vmhaddshs(a: vector_signed_short, b: vector_signed_short, c: vector_signed_short) -> vector_signed_short;
}
mod sealed {
@ -723,6 +725,15 @@ mod endian {
b.vec_vperm(a, c)
}
}
/// Vector Multiply Add Saturated
#[inline]
#[target_feature(enable = "altivec")]
#[cfg_attr(test, assert_instr(vmhaddshs))]
pub unsafe fn vec_madds(a: vector_signed_short, b: vector_signed_short, c: vector_signed_short) -> vector_signed_short {
vmhaddshs(a, b, c)
}
#[cfg(target_endian = "big")]
mod endian {
use super::*;
@ -837,6 +848,17 @@ mod tests {
0x04, 0x05, 0x06, 0x07, 0x14, 0x15, 0x16, 0x17],
[0.0, 1.0, 1.0, 1.1]}
#[simd_test(enable = "altivec")]
unsafe fn test_vec_madds() {
let a: vector_signed_short = i16x8::new(0 * 256, 1 * 256, 2 * 256, 3 * 256, 4 * 256, 5 * 256, 6 * 256, 7 * 256).into_bits();
let b: vector_signed_short = i16x8::new(256, 256, 256, 256, 256, 256, 256, 256).into_bits();
let c: vector_signed_short = i16x8::new(0, 1, 2, 3, 4, 5, 6, 7).into_bits();
let d = i16x8::new(0, 3, 6, 9, 12, 15, 18, 21);
assert_eq!(d, vec_madds(a, b, c).into_bits());
}
#[simd_test(enable = "altivec")]
unsafe fn vec_add_i32x4_i32x4() {
let x = i32x4::new(1, 2, 3, 4);