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de452ad | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | // Copyright 2025 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.
//go:build ignore
// This program can be compiled with -S to produce a “cheat sheet”
// for filling out a new Arch: the compiler will show you how to implement
// the various operations.
//
// Usage (replace TARGET with your target architecture):
//
// GOOS=linux GOARCH=TARGET go build -gcflags='-p=cheat -S' cheat.go
package p
import "math/bits"
func mov(x, y uint) uint { return y }
func zero() uint { return 0 }
func add(x, y uint) uint { return x + y }
func adds(x, y, c uint) (uint, uint) { return bits.Add(x, y, 0) }
func adcs(x, y, c uint) (uint, uint) { return bits.Add(x, y, c) }
func sub(x, y uint) uint { return x + y }
func subs(x, y uint) (uint, uint) { return bits.Sub(x, y, 0) }
func sbcs(x, y, c uint) (uint, uint) { return bits.Sub(x, y, c) }
func mul(x, y uint) uint { return x * y }
func mulWide(x, y uint) (uint, uint) { return bits.Mul(x, y) }
func lsh(x, s uint) uint { return x << s }
func rsh(x, s uint) uint { return x >> s }
func and(x, y uint) uint { return x & y }
func or(x, y uint) uint { return x | y }
func xor(x, y uint) uint { return x ^ y }
func neg(x uint) uint { return -x }
func loop(x int) int {
s := 0
for i := 1; i < x; i++ {
s += i
if s == 98 { // useful for jmpEqual
return 99
}
if s == 99 {
return 100
}
if s == 0 { // useful for jmpZero
return 101
}
if s != 0 { // useful for jmpNonZero
s *= 3
}
s += 2 // keep last condition from being inverted
}
return s
}
func mem(x *[10]struct{ a, b uint }, i int) uint { return x[i].b }
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