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Diffstat (limited to 'library/stdarch/crates/std_detect/src/detect/arch/x86.rs')
| -rw-r--r-- | library/stdarch/crates/std_detect/src/detect/arch/x86.rs | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/library/stdarch/crates/std_detect/src/detect/arch/x86.rs b/library/stdarch/crates/std_detect/src/detect/arch/x86.rs new file mode 100644 index 000000000..893e1a887 --- /dev/null +++ b/library/stdarch/crates/std_detect/src/detect/arch/x86.rs @@ -0,0 +1,197 @@ +//! This module implements minimal run-time feature detection for x86. +//! +//! The features are detected using the `detect_features` function below. +//! This function uses the CPUID instruction to read the feature flags from the +//! CPU and encodes them in a `usize` where each bit position represents +//! whether a feature is available (bit is set) or unavailable (bit is cleared). +//! +//! The enum `Feature` is used to map bit positions to feature names, and the +//! the `__crate::detect::check_for!` macro is used to map string literals (e.g., +//! "avx") to these bit positions (e.g., `Feature::avx`). +//! +//! The run-time feature detection is performed by the +//! `__crate::detect::check_for(Feature) -> bool` function. On its first call, +//! this functions queries the CPU for the available features and stores them +//! in a global `AtomicUsize` variable. The query is performed by just checking +//! whether the feature bit in this global variable is set or cleared. + +features! { + @TARGET: x86; + @CFG: any(target_arch = "x86", target_arch = "x86_64"); + @MACRO_NAME: is_x86_feature_detected; + @MACRO_ATTRS: + /// A macro to test at *runtime* whether a CPU feature is available on + /// x86/x86-64 platforms. + /// + /// This macro is provided in the standard library and will detect at runtime + /// whether the specified CPU feature is detected. This does **not** resolve at + /// compile time unless the specified feature is already enabled for the entire + /// crate. Runtime detection currently relies mostly on the `cpuid` instruction. + /// + /// This macro only takes one argument which is a string literal of the feature + /// being tested for. The feature names supported are the lowercase versions of + /// the ones defined by Intel in [their documentation][docs]. + /// + /// ## Supported arguments + /// + /// This macro supports the same names that `#[target_feature]` supports. Unlike + /// `#[target_feature]`, however, this macro does not support names separated + /// with a comma. Instead testing for multiple features must be done through + /// separate macro invocations for now. + /// + /// Supported arguments are: + /// + /// * `"aes"` + /// * `"pclmulqdq"` + /// * `"rdrand"` + /// * `"rdseed"` + /// * `"tsc"` + /// * `"mmx"` + /// * `"sse"` + /// * `"sse2"` + /// * `"sse3"` + /// * `"ssse3"` + /// * `"sse4.1"` + /// * `"sse4.2"` + /// * `"sse4a"` + /// * `"sha"` + /// * `"avx"` + /// * `"avx2"` + /// * `"avx512f"` + /// * `"avx512cd"` + /// * `"avx512er"` + /// * `"avx512pf"` + /// * `"avx512bw"` + /// * `"avx512dq"` + /// * `"avx512vl"` + /// * `"avx512ifma"` + /// * `"avx512vbmi"` + /// * `"avx512vpopcntdq"` + /// * `"avx512vbmi2"` + /// * `"avx512gfni"` + /// * `"avx512vaes"` + /// * `"avx512vpclmulqdq"` + /// * `"avx512vnni"` + /// * `"avx512bitalg"` + /// * `"avx512bf16"` + /// * `"avx512vp2intersect"` + /// * `"f16c"` + /// * `"fma"` + /// * `"bmi1"` + /// * `"bmi2"` + /// * `"abm"` + /// * `"lzcnt"` + /// * `"tbm"` + /// * `"popcnt"` + /// * `"fxsr"` + /// * `"xsave"` + /// * `"xsaveopt"` + /// * `"xsaves"` + /// * `"xsavec"` + /// * `"cmpxchg16b"` + /// * `"adx"` + /// * `"rtm"` + /// + /// [docs]: https://software.intel.com/sites/landingpage/IntrinsicsGuide + #[stable(feature = "simd_x86", since = "1.27.0")] + @BIND_FEATURE_NAME: "abm"; "lzcnt"; // abm is a synonym for lzcnt + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] aes: "aes"; + /// AES (Advanced Encryption Standard New Instructions AES-NI) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] pclmulqdq: "pclmulqdq"; + /// CLMUL (Carry-less Multiplication) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] rdrand: "rdrand"; + /// RDRAND + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] rdseed: "rdseed"; + /// RDSEED + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] tsc: "tsc"; + /// TSC (Time Stamp Counter) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] mmx: "mmx"; + /// MMX (MultiMedia eXtensions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] sse: "sse"; + /// SSE (Streaming SIMD Extensions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] sse2: "sse2"; + /// SSE2 (Streaming SIMD Extensions 2) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] sse3: "sse3"; + /// SSE3 (Streaming SIMD Extensions 3) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] ssse3: "ssse3"; + /// SSSE3 (Supplemental Streaming SIMD Extensions 3) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] sse4_1: "sse4.1"; + /// SSE4.1 (Streaming SIMD Extensions 4.1) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] sse4_2: "sse4.2"; + /// SSE4.2 (Streaming SIMD Extensions 4.2) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] sse4a: "sse4a"; + /// SSE4a (Streaming SIMD Extensions 4a) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] sha: "sha"; + /// SHA + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx: "avx"; + /// AVX (Advanced Vector Extensions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx2: "avx2"; + /// AVX2 (Advanced Vector Extensions 2) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512f: "avx512f" ; + /// AVX-512 F (Foundation) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512cd: "avx512cd" ; + /// AVX-512 CD (Conflict Detection Instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512er: "avx512er"; + /// AVX-512 ER (Expo nential and Reciprocal Instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512pf: "avx512pf"; + /// AVX-512 PF (Prefetch Instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512bw: "avx512bw"; + /// AVX-512 BW (Byte and Word Instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512dq: "avx512dq"; + /// AVX-512 DQ (Doubleword and Quadword) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vl: "avx512vl"; + /// AVX-512 VL (Vector Length Extensions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512ifma: "avx512ifma"; + /// AVX-512 IFMA (Integer Fused Multiply Add) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vbmi: "avx512vbmi"; + /// AVX-512 VBMI (Vector Byte Manipulation Instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vpopcntdq: "avx512vpopcntdq"; + /// AVX-512 VPOPCNTDQ (Vector Population Count Doubleword and + /// Quadword) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vbmi2: "avx512vbmi2"; + /// AVX-512 VBMI2 (Additional byte, word, dword and qword capabilities) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512gfni: "avx512gfni"; + /// AVX-512 GFNI (Galois Field New Instruction) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vaes: "avx512vaes"; + /// AVX-512 VAES (Vector AES instruction) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vpclmulqdq: "avx512vpclmulqdq"; + /// AVX-512 VPCLMULQDQ (Vector PCLMULQDQ instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vnni: "avx512vnni"; + /// AVX-512 VNNI (Vector Neural Network Instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512bitalg: "avx512bitalg"; + /// AVX-512 BITALG (Support for VPOPCNT\[B,W\] and VPSHUFBITQMB) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512bf16: "avx512bf16"; + /// AVX-512 BF16 (BFLOAT16 instructions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] avx512vp2intersect: "avx512vp2intersect"; + /// AVX-512 P2INTERSECT + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] f16c: "f16c"; + /// F16C (Conversions between IEEE-754 `binary16` and `binary32` formats) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] fma: "fma"; + /// FMA (Fused Multiply Add) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] bmi1: "bmi1" ; + /// BMI1 (Bit Manipulation Instructions 1) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] bmi2: "bmi2" ; + /// BMI2 (Bit Manipulation Instructions 2) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] lzcnt: "lzcnt"; + /// ABM (Advanced Bit Manipulation) / LZCNT (Leading Zero Count) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] tbm: "tbm"; + /// TBM (Trailing Bit Manipulation) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] popcnt: "popcnt"; + /// POPCNT (Population Count) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] fxsr: "fxsr"; + /// FXSR (Floating-point context fast save and restore) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] xsave: "xsave"; + /// XSAVE (Save Processor Extended States) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] xsaveopt: "xsaveopt"; + /// XSAVEOPT (Save Processor Extended States Optimized) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] xsaves: "xsaves"; + /// XSAVES (Save Processor Extended States Supervisor) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] xsavec: "xsavec"; + /// XSAVEC (Save Processor Extended States Compacted) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] cmpxchg16b: "cmpxchg16b"; + /// CMPXCH16B (16-byte compare-and-swap instruction) + @FEATURE: #[stable(feature = "simd_x86_adx", since = "1.33.0")] adx: "adx"; + /// ADX, Intel ADX (Multi-Precision Add-Carry Instruction Extensions) + @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] rtm: "rtm"; + /// RTM, Intel (Restricted Transactional Memory) +} |