packed.rs - source
Description: Source of the Rust file `library/core/src/../../stdarch/crates/core_arch/src/nvptx/packed.rs`.

#
core/stdarch/crates/core_arch/src/nvptx/
packed.rs

    1//! NVPTX Packed data types (SIMD)
    2//!
    3//! Packed Data Types is what PTX calls SIMD types. See [PTX ISA (Packed Data Types)](https://docs.nvidia.com/cuda/parallel-thread-execution/#packed-data-types) for a full reference.
    4
    5// Note: #[assert_instr] tests are not actually being run on nvptx due to being a `no_std` target incapable of running tests. Something like FileCheck would be appropriate for verifying the correct instruction is used.
    6
    7use crate::intrinsics::simd::*;
    8
    9#[allow(improper_ctypes)]
    10unsafe extern "C" {
    11    #[link_name = "llvm.minimum.v2f16"]
    12    fn llvm_f16x2_minimum(a: f16x2, b: f16x2) -> f16x2;
    13    #[link_name = "llvm.maximum.v2f16"]
    14    fn llvm_f16x2_maximum(a: f16x2, b: f16x2) -> f16x2;
    15}
    16
    17types! {
    18    #![unstable(feature = "stdarch_nvptx", issue = "111199")]
    19
    20    /// PTX-specific 32-bit wide floating point (f16 x 2) vector type
    21    pub struct f16x2(2 x f16);
    22
    23}
    24
    25/// Add two values, round to nearest even
    26///
    27/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-add>
    28///
    29/// Corresponds to the CUDA C intrinsics:
    30///  - [`__hadd2`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1g921c795176eaa31265bd80ef4fe4b8e6)
    31///  - [`__hadd2_rn`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1g6cd8ddb2c3d670e1a10c3eb2e7644f82)
    32#[inline]
    33#[cfg_attr(test, assert_instr(add.rn.f16x22))]
    34#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    35pub unsafe fn f16x2_add(a: f16x2, b: f16x2) -> f16x2 {
    36    simd_add(a, b)
    37}
    38
    39/// Subtract two values, round to nearest even
    40///
    41/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-sub>
    42///
    43/// Corresponds to the CUDA C intrinsics:
    44///  - [`__hsub2`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1ga5536c9c3d853d8c8b9de60e18b41e54)
    45///  - [`__hsub2_rn`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1g8adc164c68d553354f749f0f0645a874)
    46#[inline]
    47#[cfg_attr(test, assert_instr(sub.rn.f16x2))]
    48#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    49pub unsafe fn f16x2_sub(a: f16x2, b: f16x2) -> f16x2 {
    50    simd_sub(a, b)
    51}
    52
    53/// Multiply two values, round to nearest even
    54///
    55/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-mul>
    56///
    57/// Corresponds to the CUDA C intrinsics:
    58///  - [`__hmul2`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1g70de3f2ee48babe4e0969397ac17708e)
    59///  - [`__hmul2_rn`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1g99f8fe23a4b4c6898d6faf999afaa76e)
    60#[inline]
    61#[cfg_attr(test, assert_instr(mul.rn.f16x2))]
    62#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    63pub unsafe fn f16x2_mul(a: f16x2, b: f16x2) -> f16x2 {
    64    simd_mul(a, b)
    65}
    66
    67/// Fused multiply-add, round to nearest even
    68///
    69/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-fma>
    70///
    71/// Corresponds to the CUDA C intrinsics:
    72///  - [`__fma2`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1g43628ba21ded8b1e188a367348008dab)
    73///  - [`__fma2_rn`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC_1g43628ba21ded8b1e188a367348008dab)
    74#[inline]
    75#[cfg_attr(test, assert_instr(fma.rn.f16x2))]
    76#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    77pub unsafe fn f16x2_fma(a: f16x2, b: f16x2, c: f16x2) -> f16x2 {
    78    simd_fma(a, b, c)
    79}
    80
    81/// Arithmetic negate
    82///
    83/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-neg>
    84///
    85/// Corresponds to the CUDA C intrinsic [`__hmin2`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON_1g9e17a33f96061804166f3fbd395422b6)
    86#[inline]
    87#[cfg_attr(test, assert_instr(neg.f16x2))]
    88#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    89pub unsafe fn f16x2_neg(a: f16x2) -> f16x2 {
    90    simd_neg(a)
    91}
    92
    93/// Find the minimum of two values
    94///
    95/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-min>
    96///
    97/// Corresponds to the CUDA C intrinsic [`__hmin2`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON_1g9e17a33f96061804166f3fbd395422b6)
    98#[inline]
    99#[cfg_attr(test, assert_instr(min.f16x2))]
    100#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    101pub unsafe fn f16x2_min(a: f16x2, b: f16x2) -> f16x2 {
    102    simd_fmin(a, b)
    103}
    104
    105/// Find the minimum of two values, NaNs pass through.
    106///
    107/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-min>
    108///
    109/// Corresponds to the CUDA C intrinsic [`__hmin2_nan`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON_1g8bb8f58e9294cc261d2f42c4d5aecd6b)
    110#[inline]
    111#[cfg_attr(test, assert_instr(min.NaN.f16x2))]
    112#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    113pub unsafe fn f16x2_min_nan(a: f16x2, b: f16x2) -> f16x2 {
    114    llvm_f16x2_minimum(a, b)
    115}
    116
    117/// Find the maximum of two values
    118///
    119/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-max>
    120///
    121/// Corresponds to the CUDA C intrinsic [`__hmax2`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON_1g59fc7fc7975d8127b202444a05e57e3d)
    122#[inline]
    123#[cfg_attr(test, assert_instr(max.f16x2))]
    124#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    125pub unsafe fn f16x2_max(a: f16x2, b: f16x2) -> f16x2 {
    126    simd_fmax(a, b)
    127}
    128
    129/// Find the maximum of two values, NaNs pass through.
    130///
    131/// <https://docs.nvidia.com/cuda/parallel-thread-execution/#half-precision-floating-point-instructions-max>
    132///
    133/// Corresponds to the CUDA C intrinsic [`__hmax2_nan`](https://docs.nvidia.com/cuda/cuda-math-api/group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON_1g41623db7850e3074fd9daa80a14c3897)
    134#[inline]
    135#[cfg_attr(test, assert_instr(max.NaN.f16x2))]
    136#[unstable(feature = "stdarch_nvptx", issue = "111199")]
    137pub unsafe fn f16x2_max_nan(a: f16x2, b: f16x2) -> f16x2 {
    138    llvm_f16x2_maximum(a, b)
    139}