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Diffstat (limited to 'src/reflect/float32reg_riscv64.s')
| -rw-r--r-- | src/reflect/float32reg_riscv64.s | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/reflect/float32reg_riscv64.s b/src/reflect/float32reg_riscv64.s new file mode 100644 index 0000000..8fcf3ba --- /dev/null +++ b/src/reflect/float32reg_riscv64.s @@ -0,0 +1,27 @@ +// 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 + |