Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | //===-- Square root of IEEE 754 floating point numbers ----------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef LLVM_LIBC_SRC___SUPPORT_FPUTIL_SQRT_H |
| 10 | #define LLVM_LIBC_SRC___SUPPORT_FPUTIL_SQRT_H |
| 11 | |
| 12 | #include "src/__support/macros/properties/architectures.h" |
| 13 | #include "src/__support/macros/properties/cpu_features.h" |
| 14 | |
| 15 | #include "src/__support/FPUtil/generic/sqrt.h" |
| 16 | |
| 17 | // Generic instruction specializations with __builtin_elementwise_sqrt. |
| 18 | #if defined(LIBC_TARGET_CPU_HAS_FPU_FLOAT) || \ |
| 19 | defined(LIBC_TARGET_CPU_HAS_FPU_DOUBLE) |
| 20 | |
| 21 | #if __has_builtin(__builtin_elementwise_sqrt) |
| 22 | |
| 23 | namespace LIBC_NAMESPACE_DECL { |
| 24 | namespace fputil { |
| 25 | |
| 26 | #ifdef LIBC_TARGET_CPU_HAS_FPU_FLOAT |
| 27 | template <> LIBC_INLINE float sqrt<float>(float x) { |
| 28 | return __builtin_elementwise_sqrt(x); |
| 29 | } |
| 30 | #endif // LIBC_TARGET_CPU_HAS_FPU_FLOAT |
| 31 | |
| 32 | #ifdef LIBC_TARGET_CPU_HAS_FPU_DOUBLE |
| 33 | template <> LIBC_INLINE double sqrt<double>(double x) { |
| 34 | return __builtin_elementwise_sqrt(x); |
| 35 | } |
| 36 | #endif // LIBC_TARGET_CPU_HAS_FPU_DOUBLE |
| 37 | |
| 38 | // Use 80-bit long double instruction on x86. |
| 39 | // https://godbolt.org/z/oWEaj6hxK |
| 40 | #ifdef LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80 |
| 41 | template <> LIBC_INLINE long double sqrt<long double>(long double x) { |
| 42 | return __builtin_elementwise_sqrt(x); |
| 43 | } |
| 44 | #endif // LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80 |
| 45 | |
| 46 | } // namespace fputil |
| 47 | } // namespace LIBC_NAMESPACE_DECL |
| 48 | |
| 49 | #else // __builtin_elementwise_sqrt |
| 50 | // Use inline assembly when __builtin_elementwise_sqrt is not available. |
| 51 | #if defined(LIBC_TARGET_CPU_HAS_SSE2) |
| 52 | #include "x86_64/sqrt.h" |
| 53 | #elif defined(LIBC_TARGET_ARCH_IS_AARCH64) && defined(__ARM_FP) |
| 54 | #include "aarch64/sqrt.h" |
| 55 | #elif defined(LIBC_TARGET_ARCH_IS_ARM) |
| 56 | #include "arm/sqrt.h" |
| 57 | #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV) |
| 58 | #include "riscv/sqrt.h" |
| 59 | #endif // Target specific header of inline asm. |
| 60 | |
| 61 | #endif // __builtin_elementwise_sqrt |
| 62 | |
| 63 | #endif // LIBC_TARGET_CPU_HAS_FPU_FLOAT or DOUBLE |
| 64 | |
| 65 | #endif // LLVM_LIBC_SRC___SUPPORT_FPUTIL_SQRT_H |
| 66 |
Warning: This file is not a C or C++ file. It does not have highlighting.