Gecko [ 167.86.127.34 ]

Name	Size	Permission
README	5.15 KB	-rw-r--r--
alloc.go	902 B	-rw-r--r--
arithmetic.go	10.67 KB	-rw-r--r--
bitfield.go	5.54 KB	-rw-r--r--
bits.go	5.18 KB	-rw-r--r--
compare_and_branch.go	2.81 KB	-rw-r--r--
comparisons.go	5.04 KB	-rw-r--r--
condmove.go	3.14 KB	-rw-r--r--
copy.go	1.72 KB	-rw-r--r--
floats.go	3.06 KB	-rw-r--r--
issue22703.go	5.43 KB	-rw-r--r--
issue25378.go	433 B	-rw-r--r--
issue31618.go	504 B	-rw-r--r--
issue33580.go	459 B	-rw-r--r--
mapaccess.go	9.21 KB	-rw-r--r--
maps.go	2.77 KB	-rw-r--r--
math.go	4.54 KB	-rw-r--r--
mathbits.go	12.75 KB	-rw-r--r--
memcombine.go	22.58 KB	-rw-r--r--
memops.go	1.43 KB	-rw-r--r--
noextend.go	5.57 KB	-rw-r--r--
race.go	581 B	-rw-r--r--
rotate.go	2.51 KB	-rw-r--r--
shift.go	2.62 KB	-rw-r--r--
slices.go	3.36 KB	-rw-r--r--
stack.go	2.96 KB	-rw-r--r--
strings.go	2.03 KB	-rw-r--r--
structs.go	905 B	-rw-r--r--
switch.go	409 B	-rw-r--r--
zerosize.go	537 B	-rw-r--r--

Code Editor : condmove.go

// asmcheck

// Copyright 2018 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.

package codegen

func cmovint(c int) int {
	x := c + 4
	if x < 0 {
		x = 182
	}
	// amd64:"CMOVQLT"
	// arm64:"CSEL\tLT"
	// wasm:"Select"
	return x
}

func cmovchan(x, y chan int) chan int {
	if x != y {
		x = y
	}
	// amd64:"CMOVQNE"
	// arm64:"CSEL\tNE"
	// wasm:"Select"
	return x
}

func cmovuintptr(x, y uintptr) uintptr {
	if x < y {
		x = -y
	}
	// amd64:"CMOVQCS"
	// arm64:"CSEL\tLO"
	// wasm:"Select"
	return x
}

func cmov32bit(x, y uint32) uint32 {
	if x < y {
		x = -y
	}
	// amd64:"CMOVLCS"
	// arm64:"CSEL\tLO"
	// wasm:"Select"
	return x
}

func cmov16bit(x, y uint16) uint16 {
	if x < y {
		x = -y
	}
	// amd64:"CMOVWCS"
	// arm64:"CSEL\tLO"
	// wasm:"Select"
	return x
}

// Floating point comparison. For EQ/NE, we must
// generate special code to handle NaNs.
func cmovfloateq(x, y float64) int {
	a := 128
	if x == y {
		a = 256
	}
	// amd64:"CMOVQNE","CMOVQPC"
	// arm64:"CSEL\tEQ"
	// wasm:"Select"
	return a
}

func cmovfloatne(x, y float64) int {
	a := 128
	if x != y {
		a = 256
	}
	// amd64:"CMOVQNE","CMOVQPS"
	// arm64:"CSEL\tNE"
	// wasm:"Select"
	return a
}

//go:noinline
func frexp(f float64) (frac float64, exp int) {
	return 1.0, 4
}

//go:noinline
func ldexp(frac float64, exp int) float64 {
	return 1.0
}

// Generate a CMOV with a floating comparison and integer move.
func cmovfloatint2(x, y float64) float64 {
	yfr, yexp := 4.0, 5

r := x
	for r >= y {
		rfr, rexp := frexp(r)
		if rfr < yfr {
			rexp = rexp - 1
		}
		// amd64:"CMOVQHI"
		// arm64:"CSEL\tMI"
		// wasm:"Select"
		r = r - ldexp(y, (rexp-yexp))
	}
	return r
}

func cmovloaded(x [4]int, y int) int {
	if x[2] != 0 {
		y = x[2]
	} else {
		y = y >> 2
	}
	// amd64:"CMOVQNE"
	// arm64:"CSEL\tNE"
	// wasm:"Select"
	return y
}

func cmovuintptr2(x, y uintptr) uintptr {
	a := x * 2
	if a == 0 {
		a = 256
	}
	// amd64:"CMOVQEQ"
	// arm64:"CSEL\tEQ"
	// wasm:"Select"
	return a
}

// Floating point CMOVs are not supported by amd64/arm64
func cmovfloatmove(x, y int) float64 {
	a := 1.0
	if x <= y {
		a = 2.0
	}
	// amd64:-"CMOV"
	// arm64:-"CSEL"
	// wasm:-"Select"
	return a
}

// On amd64, the following patterns trigger comparison inversion.
// Test that we correctly invert the CMOV condition
var gsink int64
var gusink uint64

func cmovinvert1(x, y int64) int64 {
	if x < gsink {
		y = -y
	}
	// amd64:"CMOVQGT"
	return y
}
func cmovinvert2(x, y int64) int64 {
	if x <= gsink {
		y = -y
	}
	// amd64:"CMOVQGE"
	return y
}
func cmovinvert3(x, y int64) int64 {
	if x == gsink {
		y = -y
	}
	// amd64:"CMOVQEQ"
	return y
}
func cmovinvert4(x, y int64) int64 {
	if x != gsink {
		y = -y
	}
	// amd64:"CMOVQNE"
	return y
}
func cmovinvert5(x, y uint64) uint64 {
	if x > gusink {
		y = -y
	}
	// amd64:"CMOVQCS"
	return y
}
func cmovinvert6(x, y uint64) uint64 {
	if x >= gusink {
		y = -y
	}
	// amd64:"CMOVQLS"
	return y
}

func cmovload(a []int, i int, b bool) int {
	if b {
		i++
	}
	// See issue 26306
	// amd64:-"CMOVQNE"
	return a[i]
}

func cmovstore(a []int, i int, b bool) {
	if b {
		i++
	}
	// amd64:"CMOVQNE"
	a[i] = 7
}

${this.title}

Code Editor : condmove.go