1// Copyright 2022 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5#include "textflag.h"
6
7// riscv64 allows 32-bit floats to live in the bottom
8// part of the register, it expects them to be NaN-boxed.
9// These functions are needed to ensure correct conversions
10// on riscv64.
11
12// Convert float32->uint64
13TEXT ·archFloat32ToReg(SB),NOSPLIT,$0-16
14	MOVF	val+0(FP), F1
15	MOVD	F1, ret+8(FP)
16	RET
17
18// Convert uint64->float32
19TEXT ·archFloat32FromReg(SB),NOSPLIT,$0-12
20	// Normally a float64->float32 conversion
21	// would need rounding, but riscv64 store valid
22	// float32 in the lower 32 bits, thus we only need to
23	// unboxed the NaN-box by store a float32.
24	MOVD	reg+0(FP), F1
25	MOVF	F1, ret+8(FP)
26	RET
27
28