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

package runtime

import "unsafe"

func float64touint32(a float64) uint32
func uint32tofloat64(a uint32) float64

// stackcheck checks that SP is in range [g->stack.lo, g->stack.hi).
func stackcheck()

// Called from assembly only; declared for go vet.

	{"runtime.float64toint64", 1},
	{"runtime.float64touint64", 1},
	{"runtime.float64touint32", 1},
	{"runtime.int64tofloat64", 1},
	{"runtime.int64tofloat32", 1},
	{"runtime.uint64tofloat64", 1},
	{"runtime.uint64tofloat32", 1},
	{"runtime.uint32tofloat64", 1},
	{"runtime.complex128div", 1},
	{"runtime.getcallerpc", 1},
	{"runtime.getcallersp", 1},
	{"runtime.racefuncenter", 1},
	{"runtime.racefuncexit", 1},

func float64touint64(float64) uint64
func float64touint32(float64) uint32
func int64tofloat64(int64) float64
func int64tofloat32(int64) float32
func uint64tofloat64(uint64) float64
func uint64tofloat32(uint64) float32
func uint32tofloat64(uint32) float64

func complex128div(num complex128, den complex128) (quo complex128)

func getcallerpc() uintptr
func getcallersp() uintptr

// race detection

	{"float64touint64", funcTag, 134},
	{"float64touint32", funcTag, 135},
	{"int64tofloat64", funcTag, 136},
	{"int64tofloat32", funcTag, 138},
	{"uint64tofloat64", funcTag, 139},
	{"uint64tofloat32", funcTag, 140},
	{"uint32tofloat64", funcTag, 141},
	{"complex128div", funcTag, 142},
	{"getcallerpc", funcTag, 143},
	{"getcallersp", funcTag, 143},
	{"racefuncenter", funcTag, 31},

	return
}

func float64touint64(d float64) (y uint64) {
	_d2v(&y, d)
	return
}

func int64tofloat64(y int64) float64 {
	if y < 0 {
		return -uint64tofloat64(-uint64(y))
	}
	return uint64tofloat64(uint64(y))
}

func uint64tofloat64(y uint64) float64 {
	hi := float64(uint32(y >> 32))
	lo := float64(uint32(y))
	d := hi*(1<<32) + lo
	return d
}

func int64tofloat32(y int64) float32 {

	cvtF2F: ssa.OpCvt64Fto32F,
}

func (s *state) uint32Tofloat64(n ir.Node, x *ssa.Value, ft, tt *types.Type) *ssa.Value {
	return s.uint32Tofloat(&u32_f64, n, x, ft, tt)
}

func (s *state) uint32Tofloat32(n ir.Node, x *ssa.Value, ft, tt *types.Type) *ssa.Value {
	return s.uint32Tofloat(&u32_f32, n, x, ft, tt)
}