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Auto merge of #128528 - workingjubilee:you-dont-need-to-see-this-cpuid-move-along, r=Amanieu

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Finish removing `has_cpuid`

The one use of it was guaranteed to be always true.

try-job: test-various
This commit is contained in:
bors 2024-08-03 00:18:15 +00:00
commit 1df0458781
4 changed files with 0 additions and 30 deletions
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4
library/std/src/lib.rs
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@ -269,10 +269,6 @@
#![cfg_attr(any(windows, target_os = "uefi"), feature(round_char_boundary))]
#![cfg_attr(target_family = "wasm", feature(stdarch_wasm_atomic_wait))]
#![cfg_attr(target_arch = "wasm64", feature(simd_wasm64))]
#![cfg_attr(
all(any(target_arch = "x86_64", target_arch = "x86"), target_os = "uefi"),
feature(stdarch_x86_has_cpuid)
)]
//
// Language features:
// tidy-alphabetical-start

8
library/std/src/sys/pal/uefi/time.rs
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@ -175,10 +175,6 @@ pub fn platform_specific() -> Option<Instant> {
#[cfg(target_arch = "x86_64")]
fn timestamp_rdtsc() -> Option<Duration> {
if !crate::arch::x86_64::has_cpuid() {
return None;
}
static FREQUENCY: crate::sync::OnceLock<u64> = crate::sync::OnceLock::new();
// Get Frequency in Mhz
@ -200,10 +196,6 @@ fn timestamp_rdtsc() -> Option<Duration> {
#[cfg(target_arch = "x86")]
fn timestamp_rdtsc() -> Option<Duration> {
if !crate::arch::x86::has_cpuid() {
return None;
}
static FREQUENCY: crate::sync::OnceLock<u64> = crate::sync::OnceLock::new();
let freq = FREQUENCY

9
src/tools/rustfmt/tests/source/cfg_if/detect/os/x86.rs
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@ -34,15 +34,6 @@ pub fn check_for(x: Feature) -> bool {
fn detect_features() -> cache::Initializer {
let mut value = cache::Initializer::default();
// If the x86 CPU does not support the CPUID instruction then it is too
// old to support any of the currently-detectable features.
if !has_cpuid() {
return value;
}
// Calling `__cpuid`/`__cpuid_count` from here on is safe because the CPU
// has `cpuid` support.
// 0. EAX = 0: Basic Information:
// - EAX returns the "Highest Function Parameter", that is, the maximum
// leaf value for subsequent calls of `cpuinfo` in range [0,

9
src/tools/rustfmt/tests/target/cfg_if/detect/os/x86.rs
View File

@ -34,15 +34,6 @@ pub fn check_for(x: Feature) -> bool {
fn detect_features() -> cache::Initializer {
let mut value = cache::Initializer::default();
// If the x86 CPU does not support the CPUID instruction then it is too
// old to support any of the currently-detectable features.
if !has_cpuid() {
return value;
}
// Calling `__cpuid`/`__cpuid_count` from here on is safe because the CPU
// has `cpuid` support.
// 0. EAX = 0: Basic Information:
// - EAX returns the "Highest Function Parameter", that is, the maximum
// leaf value for subsequent calls of `cpuinfo` in range [0,