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[bmi] add some more code-gen tests

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This commit is contained in:
gnzlbg 2017-09-21 08:53:13 +02:00
parent 53540f0eee
commit bbeec63f52
2 changed files with 6 additions and 3 deletions
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4
library/stdarch/src/arm/v8.rs
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@ -36,7 +36,7 @@ pub fn _rbit_u64(x: u64) -> u64 {
/// When all bits of the operand are set it returns the size of the operand in
/// bits.
#[inline(always)]
// #[cfg_attr(test, assert_instr(cls))] // LLVM Bug: https://bugs.llvm.org/show_bug.cgi?id=31802
// LLVM Bug (should be cls): https://bugs.llvm.org/show_bug.cgi?id=31802
#[cfg_attr(test, assert_instr(clz))]
pub fn _cls_u32(x: u32) -> u32 {
u32::leading_zeros(!x) as u32
@ -47,7 +47,7 @@ pub fn _cls_u32(x: u32) -> u32 {
/// When all bits of the operand are set it returns the size of the operand in
/// bits.
#[inline(always)]
// #[cfg_attr(test, assert_instr(cls))] // LLVM Bug: https://bugs.llvm.org/show_bug.cgi?id=31802
// LLVM Bug (should be cls): https://bugs.llvm.org/show_bug.cgi?id=31802
#[cfg_attr(test, assert_instr(clz))]
pub fn _cls_u64(x: u64) -> u64 {
u64::leading_zeros(!x) as u64

5
library/stdarch/src/x86/bmi2.rs
View file

@ -2,7 +2,7 @@
//!
//! The reference is [Intel 64 and IA-32 Architectures Software Developer's
//! Manual Volume 2: Instruction Set Reference,
//! A-Z](http://www.intel.de/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.pdf).
//! A-Z](http://www.intel.de/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectu res-software-developer-instruction-set-reference-manual-325383.pdf).
//!
//! [Wikipedia](https://en.wikipedia.org/wiki/Bit_Manipulation_Instruction_Sets#BMI2_.28Bit_Manipulation_Instruction_Set_2.29)
//! provides a quick overview of the available instructions.
@ -15,6 +15,8 @@ use assert_instr::assert_instr;
/// Unsigned multiplication of `a` with `b` returning a pair `(lo, hi)` with
/// the low half and the high half of the result.
#[inline(always)]
// LLVM BUG (should be mulxl): https://bugs.llvm.org/show_bug.cgi?id=34232
#[cfg_attr(test, assert_instr(imul))]
#[target_feature = "+bmi2"]
pub fn _mulx_u32(a: u32, b: u32) -> (u32, u32) {
let result: u64 = (a as u64) * (b as u64);
@ -27,6 +29,7 @@ pub fn _mulx_u32(a: u32, b: u32) -> (u32, u32) {
/// Unsigned multiplication of `a` with `b` returning a pair `(lo, hi)` with
/// the low half and the high half of the result.
#[inline(always)]
#[cfg_attr(test, assert_instr(mulx))]
#[target_feature = "+bmi2"]
pub fn _mulx_u64(a: u64, b: u64) -> (u64, u64) {
let result: u128 = (a as u128) * (b as u128);