| // 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 |
| |
