golang noextend 代码
文件路径：/test/codegen/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 following a load
/ which has extended the value correctly.
/ Note: No tests are done for int8 since
/ an extra extension is usually needed due to
/ no signed byte load.
func set16(x8 int8, u8 *uint8, y8 int8, z8 uint8) {
/ Truncate not needed, load does sign/zero extend
/ 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(u8 *uint8, x16 *int16, u16 *uint16) {
/ 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) {
/ 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:-"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:-"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(u8 *uint8, x32 *int32, u32 *uint32, x64 *int64, u64 *uint64) bool {
/ 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(u8 *uint8, x16 *int16, u16 *uint16, x64 *int64, u64 *uint64) bool {
/ 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(u8 *uint8, x16 *int16, u16 *uint16, x32 *int32, u32 *uint32) bool {
/ 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
}