// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package reflect

func archFloat32FromReg(reg uint64) float32

// zero argument registers, but is not used.

func archFloat32FromReg(reg uint64) float32 {
	i := uint32(reg)
	return *(*float32)(unsafe.Pointer(&i))
}

func archFloat32ToReg(val float32) uint64 {
	return uint64(*(*uint32)(unsafe.Pointer(&val)))

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build ppc64le || ppc64

package reflect

func archFloat32FromReg(reg uint64) float32

// On PPC64, the float32 becomes a float64
// when loaded in a register, different from
// other platforms. These functions are
// needed to ensure correct conversions on PPC64.

// Convert float32->uint64
TEXT ·archFloat32ToReg(SB),NOSPLIT,$0-16
	FMOVS	val+0(FP), F1
	FMOVD	F1, ret+8(FP)
	RET

// Convert uint64->float32
TEXT ·archFloat32FromReg(SB),NOSPLIT,$0-12
	FMOVD	reg+0(FP), F1
	// Normally a float64->float32 conversion

// 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

//
// argSize must be either 4 or 8.
func floatToReg(r *abi.RegArgs, reg int, argSize uintptr, from unsafe.Pointer) {
	switch argSize {
	case 4:
		r.Floats[reg] = archFloat32ToReg(*(*float32)(from))
	case 8:
		r.Floats[reg] = *(*uint64)(from)
	default:
		panic("bad argSize")
	}