| //===-- RISCV64 implementations of the fma function -------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_SRC_SUPPORT_FPUTIL_RISCV64_FMA_H |
| #define LLVM_LIBC_SRC_SUPPORT_FPUTIL_RISCV64_FMA_H |
| |
| #include "src/__support/macros/properties/architectures.h" |
| #include "src/__support/macros/properties/cpu_features.h" // LIBC_TARGET_CPU_HAS_FMA |
| |
| #if !defined(LIBC_TARGET_ARCH_IS_RISCV64) |
| #error "Invalid include" |
| #endif |
| |
| #if !defined(LIBC_TARGET_CPU_HAS_FMA) |
| #error "FMA instructions are not supported" |
| #endif |
| |
| #include "src/__support/CPP/type_traits.h" |
| |
| namespace __llvm_libc { |
| namespace fputil { |
| |
| template <typename T> |
| cpp::enable_if_t<cpp::is_same_v<T, float>, T> fma(T x, T y, T z) { |
| float result; |
| __asm__ __volatile__("fmadd.s %0, %1, %2, %3\n\t" |
| : "=f"(result) |
| : "f"(x), "f"(y), "f"(z)); |
| return result; |
| } |
| |
| template <typename T> |
| cpp::enable_if_t<cpp::is_same_v<T, double>, T> fma(T x, T y, T z) { |
| double result; |
| __asm__ __volatile__("fmadd.d %0, %1, %2, %3\n\t" |
| : "=f"(result) |
| : "f"(x), "f"(y), "f"(z)); |
| return result; |
| } |
| |
| } // namespace fputil |
| } // namespace __llvm_libc |
| |
| #endif // LLVM_LIBC_SRC_SUPPORT_FPUTIL_RISCV64_FMA_H |