// 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)

RET

// 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)

RET