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| 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_X86_64_SQRT_H |
| 10 | #define LLVM_LIBC_SRC___SUPPORT_FPUTIL_X86_64_SQRT_H |
| 11 | |
| 12 | #include "src/__support/common.h" |
| 13 | #include "src/__support/macros/config.h" |
| 14 | #include "src/__support/macros/properties/architectures.h" |
| 15 | #include "src/__support/macros/properties/cpu_features.h" |
| 16 | |
| 17 | #if !(defined(LIBC_TARGET_ARCH_IS_X86_64) && defined(LIBC_TARGET_CPU_HAS_SSE2)) |
| 18 | #error "sqrtss / sqrtsd need SSE2" |
| 19 | #endif |
| 20 | |
| 21 | #include "src/__support/FPUtil/generic/sqrt.h" |
| 22 | |
| 23 | namespace LIBC_NAMESPACE_DECL { |
| 24 | namespace fputil { |
| 25 | |
| 26 | template <> LIBC_INLINE float sqrt<float>(float x) { |
| 27 | float result; |
| 28 | __asm__ __volatile__("sqrtss %x1, %x0" : "=x"(result) : "x"(x)); |
| 29 | return result; |
| 30 | } |
| 31 | |
| 32 | template <> LIBC_INLINE double sqrt<double>(double x) { |
| 33 | double result; |
| 34 | __asm__ __volatile__("sqrtsd %x1, %x0" : "=x"(result) : "x"(x)); |
| 35 | return result; |
| 36 | } |
| 37 | |
| 38 | #ifdef LIBC_TYPES_LONG_DOUBLE_IS_FLOAT64 |
| 39 | template <> LIBC_INLINE long double sqrt<long double>(long double x) { |
| 40 | long double result; |
| 41 | __asm__ __volatile__("sqrtsd %x1, %x0" : "=x"(result) : "x"(x)); |
| 42 | return result; |
| 43 | } |
| 44 | #else |
| 45 | template <> LIBC_INLINE long double sqrt<long double>(long double x) { |
| 46 | __asm__ __volatile__("fsqrt" : "+t"(x)); |
| 47 | return x; |
| 48 | } |
| 49 | #endif |
| 50 | |
| 51 | } // namespace fputil |
| 52 | } // namespace LIBC_NAMESPACE_DECL |
| 53 | |
| 54 | #endif // LLVM_LIBC_SRC___SUPPORT_FPUTIL_X86_64_SQRT_H |
| 55 |
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