blob: 8fcf3ba3e92f455f9b15761ceaad0727ab99d0de [file] [log] [blame]
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "textflag.h"
// riscv64 allows 32-bit floats to live in the bottom
// part of the register, it expects them to be NaN-boxed.
// These functions are needed to ensure correct conversions
// on riscv64.
// Convert float32->uint64
TEXT ·archFloat32ToReg(SB),NOSPLIT,$0-16
MOVF val+0(FP), F1
MOVD F1, ret+8(FP)
// Convert uint64->float32
TEXT ·archFloat32FromReg(SB),NOSPLIT,$0-12
// Normally a float64->float32 conversion
// would need rounding, but riscv64 store valid
// float32 in the lower 32 bits, thus we only need to
// unboxed the NaN-box by store a float32.
MOVD reg+0(FP), F1
MOVF F1, ret+8(FP)