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test/codegen/constants.go

35 строк1 KB

Russ Cox

test/codegen: simplify asmcheck pattern matching

29 окт 2025, 23:55

29 окт 2025, 23:55915c183

// asmcheck

// Copyright 2023 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

// A uint16 or sint16 constant shifted left.
func shifted16BitConstants() (out [64]uint64) {
	// ppc64x: "MOVD [$]8193,", "SLD [$]27,"
	out[0] = 0x0000010008000000
	// ppc64x: "MOVD [$]-32767", "SLD [$]26,"
	out[1] = 0xFFFFFE0004000000
	// ppc64x: "MOVD [$]-1", "SLD [$]48,"
	out[2] = 0xFFFF000000000000
	// ppc64x: "MOVD [$]65535", "SLD [$]44,"
	out[3] = 0x0FFFF00000000000
	return
}

// A contiguous set of 1 bits, potentially wrapping.
func contiguousMaskConstants() (out [64]uint64) {
	// ppc64x: "MOVD [$]-1", "RLDC R[0-9]+, [$]44, [$]63,"
	out[0] = 0xFFFFF00000000001
	// ppc64x: "MOVD [$]-1", "RLDC R[0-9]+, [$]43, [$]63,"
	out[1] = 0xFFFFF80000000001
	// ppc64x: "MOVD [$]-1", "RLDC R[0-9]+, [$]43, [$]4,"
	out[2] = 0x0FFFF80000000000
	// ppc64x/power8: "MOVD [$]-1", "RLDC R[0-9]+, [$]33, [$]63,"
	// ppc64x/power9: "MOVD [$]-1", "RLDC R[0-9]+, [$]33, [$]63,"
	// ppc64x/power10: "MOVD [$]-8589934591,"
	out[3] = 0xFFFFFFFE00000001
	return
}