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📁 ..
📄 README(5.21 KB)
📄 addrcalc.go(324 B)
📄 alloc.go(902 B)
📄 arithmetic.go(13.13 KB)
📄 bitfield.go(7.23 KB)
📄 bits.go(5.82 KB)
📄 bool.go(705 B)
📄 clobberdead.go(860 B)
📄 clobberdeadreg.go(1.29 KB)
📄 compare_and_branch.go(3.79 KB)
📄 comparisons.go(10.04 KB)
📄 condmove.go(5.3 KB)
📄 copy.go(3.17 KB)
📄 floats.go(3.21 KB)
📄 fuse.go(4.79 KB)
📄 issue22703.go(5.43 KB)
📄 issue25378.go(445 B)
📄 issue31618.go(504 B)
📄 issue33580.go(459 B)
📄 issue38554.go(355 B)
📄 issue42610.go(673 B)
📄 logic.go(665 B)
📄 mapaccess.go(9.21 KB)
📄 maps.go(2.78 KB)
📄 math.go(5.41 KB)
📄 mathbits.go(15.46 KB)
📄 memcombine.go(22.8 KB)
📄 memops.go(11.55 KB)
📄 noextend.go(5.57 KB)
📄 race.go(651 B)
📄 regabi_regalloc.go(494 B)
📄 retpoline.go(224 B)
📄 rotate.go(4.25 KB)
📄 select.go(353 B)
📄 shift.go(7.74 KB)
📄 shortcircuit.go(368 B)
📄 slices.go(8.09 KB)
📄 smallintiface.go(500 B)
📄 spectre.go(722 B)
📄 stack.go(2.96 KB)
📄 strings.go(2.08 KB)
📄 structs.go(887 B)
📄 switch.go(409 B)
📄 zerosize.go(610 B)

Editing: noextend.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

var sval64 [8]int64
var sval32 [8]int32
var sval16 [8]int16
var sval8 [8]int8
var val64 [8]uint64
var val32 [8]uint32
var val16 [8]uint16
var val8 [8]uint8

// ----------------------------- //
//    avoid zero/sign extensions //
// ----------------------------- //

func set16(x8 int8, u8 uint8, y8 int8, z8 uint8) {
	// Truncate not needed, load does sign/zero extend
	// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	sval16[0] = int16(x8)

// ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	val16[0] = uint16(u8)

// AND not needed due to size
	// ppc64:-"ANDCC"
	// ppc64le:-"ANDCC"
	sval16[1] = 255 & int16(x8+y8)

// ppc64:-"ANDCC"
	// ppc64le:-"ANDCC"
	val16[1] = 255 & uint16(u8+z8)

}
func shiftidx(x8 int8, u8 uint8, x16 int16, u16 uint16, x32 int32, u32 uint32) {
	// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	sval16[0] = int16(val16[x8>>1])

// ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	val16[0] = uint16(sval16[u8>>2])

// ppc64:-"MOVH\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVH\tR\\d+,\\sR\\d+"
	sval16[1] = int16(val16[x16>>1])

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	val16[1] = uint16(sval16[u16>>2])

}

func setnox(x8 int8, u8 uint8, y8 int8, z8 uint8, x16 int16, u16 uint16, x32 int32, u32 uint32) {
	// Truncate not needed due to sign/zero extension on load

// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	sval16[0] = int16(x8)

// ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	val16[0] = uint16(u8)

// AND not needed due to size
	// ppc64:-"ANDCC"
	// ppc64le:-"ANDCC"
	sval16[1] = 255 & int16(x8+y8)

// ppc64:-"ANDCC"
	// ppc64le:-"ANDCC"
	val16[1] = 255 & uint16(u8+z8)

// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	sval32[0] = int32(x8)

// ppc64:-"MOVH\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVH\tR\\d+,\\sR\\d+"
	sval32[1] = int32(x16)

//ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	//ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	val32[0] = uint32(u8)

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	val32[1] = uint32(u16)

// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	sval64[0] = int64(x8)

// ppc64:-"MOVH\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVH\tR\\d+,\\sR\\d+"
	sval64[1] = int64(x16)

// ppc64:-"MOVW\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVW\tR\\d+,\\sR\\d+"
	sval64[2] = int64(x32)

//ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	//ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	val64[0] = uint64(u8)

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	val64[1] = uint64(u16)

// ppc64:-"MOVWZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVWZ\tR\\d+,\\sR\\d+"
	val64[2] = uint64(u32)
}

func cmp16(x8 int8, u8 uint8, x32 int32, u32 uint32, x64 int64, u64 uint64) bool {
	// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	if int16(x8) == sval16[0] {
		return true
	}

// ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	if uint16(u8) == val16[0] {
		return true
	}

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	if uint16(u32>>16) == val16[0] {
		return true
	}

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	if uint16(u64>>48) == val16[0] {
		return true
	}

// Verify the truncates are using the correct sign.
	// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	if int16(x32) == sval16[0] {
		return true
	}

// ppc64:-"MOVH\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVH\tR\\d+,\\sR\\d+"
	if uint16(u32) == val16[0] {
		return true
	}

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	if int16(x64) == sval16[0] {
		return true
	}

// ppc64:-"MOVH\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVH\tR\\d+,\\sR\\d+"
	if uint16(u64) == val16[0] {
		return true
	}

return false
}

func cmp32(x8 int8, u8 uint8, x16 int16, u16 uint16, x64 int64, u64 uint64) bool {
	// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	if int32(x8) == sval32[0] {
		return true
	}

// ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	if uint32(u8) == val32[0] {
		return true
	}

// ppc64:-"MOVH\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVH\tR\\d+,\\sR\\d+"
	if int32(x16) == sval32[0] {
		return true
	}

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	if uint32(u16) == val32[0] {
		return true
	}

// Verify the truncates are using the correct sign.
	// ppc64:-"MOVWZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVWZ\tR\\d+,\\sR\\d+"
	if int32(x64) == sval32[0] {
		return true
	}

// ppc64:-"MOVW\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVW\tR\\d+,\\sR\\d+"
	if uint32(u64) == val32[0] {
		return true
	}

return false
}

func cmp64(x8 int8, u8 uint8, x16 int16, u16 uint16, x32 int32, u32 uint32) bool {
	// ppc64:-"MOVB\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVB\tR\\d+,\\sR\\d+"
	if int64(x8) == sval64[0] {
		return true
	}

// ppc64:-"MOVBZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+"
	if uint64(u8) == val64[0] {
		return true
	}

// ppc64:-"MOVH\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVH\tR\\d+,\\sR\\d+"
	if int64(x16) == sval64[0] {
		return true
	}

// ppc64:-"MOVHZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+"
	if uint64(u16) == val64[0] {
		return true
	}

// ppc64:-"MOVW\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVW\tR\\d+,\\sR\\d+"
	if int64(x32) == sval64[0] {
		return true
	}

// ppc64:-"MOVWZ\tR\\d+,\\sR\\d+"
	// ppc64le:-"MOVWZ\tR\\d+,\\sR\\d+"
	if uint64(u32) == val64[0] {
		return true
	}
	return false
}

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Editing: noextend.go

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