mirror of
https://github.com/golang/go
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773039ed5c
Generate the CC version of many opcodes whose result is compared against signed 0. The approach taken here works even if the opcode result is used in multiple places too. Add support for ADD, ADDconst, ANDN, SUB, NEG, CNTLZD, NOR conversions to their CC opcode variant. These are the most commonly used variants. Also, do not set clobberFlags of CNTLZD and CNTLZW, they do not clobber flags. This results in about 1% smaller text sections in kubernetes binaries, and no regressions in the crypto benchmarks. Change-Id: I9e0381944869c3774106bf348dead5ecb96dffda Reviewed-on: https://go-review.googlesource.com/c/go/+/538636 Run-TryBot: Paul Murphy <murp@ibm.com> TryBot-Result: Gopher Robot <gobot@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Jayanth Krishnamurthy <jayanth.krishnamurthy@ibm.com> Reviewed-by: Heschi Kreinick <heschi@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
277 lines
6.7 KiB
Go
277 lines
6.7 KiB
Go
// asmcheck
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// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package codegen
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import (
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"math/bits"
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)
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// This file contains codegen tests related to boolean simplifications/optimizations.
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func convertNeq0B(x uint8, c bool) bool {
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// amd64:"ANDL\t[$]1",-"SETNE"
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// ppc64x:"RLDICL",-"CMPW",-"ISEL"
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b := x&1 != 0
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return c && b
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}
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func convertNeq0W(x uint16, c bool) bool {
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// amd64:"ANDL\t[$]1",-"SETNE"
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// ppc64x:"RLDICL",-"CMPW",-"ISEL"
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b := x&1 != 0
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return c && b
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}
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func convertNeq0L(x uint32, c bool) bool {
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// amd64:"ANDL\t[$]1",-"SETB"
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// ppc64x:"RLDICL",-"CMPW",-"ISEL"
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b := x&1 != 0
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return c && b
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}
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func convertNeq0Q(x uint64, c bool) bool {
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// amd64:"ANDL\t[$]1",-"SETB"
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// ppc64x:"RLDICL",-"CMP",-"ISEL"
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b := x&1 != 0
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return c && b
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}
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func convertNeqBool32(x uint32) bool {
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// ppc64x:"RLDICL",-"CMPW",-"ISEL"
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return x&1 != 0
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}
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func convertEqBool32(x uint32) bool {
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// ppc64x:"RLDICL",-"CMPW","XOR",-"ISEL"
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return x&1 == 0
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}
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func convertNeqBool64(x uint64) bool {
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// ppc64x:"RLDICL",-"CMP",-"ISEL"
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return x&1 != 0
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}
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func convertEqBool64(x uint64) bool {
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// ppc64x:"RLDICL","XOR",-"CMP",-"ISEL"
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return x&1 == 0
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}
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func TestSetEq64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBC\tCR0EQ",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0EQ"
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// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0EQ"
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b := x == y
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return b
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}
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func TestSetNeq64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBCR\tCR0EQ",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0EQ"
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// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0EQ"
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b := x != y
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return b
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}
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func TestSetLt64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBC\tCR0GT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0GT"
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// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0GT"
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b := x < y
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return b
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}
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func TestSetLe64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0LT"
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// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0LT"
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b := x <= y
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return b
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}
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func TestSetGt64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0LT"
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// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0LT"
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b := x > y
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return b
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}
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func TestSetGe64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBCR\tCR0GT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0GT"
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// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0GT"
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b := x >= y
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return b
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}
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func TestSetLtFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
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// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
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b := x < y
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return b
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}
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func TestSetLeFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBC\tCR0LT","SETBC\tCR0EQ","OR",-"ISEL",-"ISEL"
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// ppc64x/power9:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
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// ppc64x/power8:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
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b := x <= y
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return b
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}
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func TestSetGtFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
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// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
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b := x > y
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return b
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}
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func TestSetGeFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBC\tCR0LT","SETBC\tCR0EQ","OR",-"ISEL",-"ISEL"
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// ppc64x/power9:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
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// ppc64x/power8:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
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b := x >= y
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return b
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}
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func TestSetInvEq64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBCR\tCR0EQ",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0EQ"
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// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0EQ"
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b := !(x == y)
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return b
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}
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func TestSetInvNeq64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBC\tCR0EQ",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0EQ"
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// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0EQ"
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b := !(x != y)
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return b
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}
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func TestSetInvLt64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBCR\tCR0GT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0GT"
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// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0GT"
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b := !(x < y)
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return b
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}
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func TestSetInvLe64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0LT"
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// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0LT"
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b := !(x <= y)
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return b
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}
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func TestSetInvGt64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0LT"
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// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0LT"
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b := !(x > y)
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return b
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}
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func TestSetInvGe64(x uint64, y uint64) bool {
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// ppc64x/power10:"SETBC\tCR0GT",-"ISEL"
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// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0GT"
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// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0GT"
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b := !(x >= y)
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return b
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}
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func TestSetInvEqFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBCR\tCR0EQ",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBCR\tCR0EQ"
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// ppc64x/power8:"FCMP","ISEL",-"SETBCR\tCR0EQ"
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b := !(x == y)
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return b
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}
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func TestSetInvNeqFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBC\tCR0EQ",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0EQ"
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// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0EQ"
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b := !(x != y)
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return b
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}
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func TestSetInvLtFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBCR\tCR0LT"
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// ppc64x/power8:"FCMP","ISEL",-"SETBCR\tCR0LT"
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b := !(x < y)
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return b
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}
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func TestSetInvLeFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
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// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
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b := !(x <= y)
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return b
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}
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func TestSetInvGtFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBCR\tCR0LT"
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// ppc64x/power8:"FCMP","ISEL",-"SETBCR\tCR0LT"
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b := !(x > y)
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return b
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}
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func TestSetInvGeFp64(x float64, y float64) bool {
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// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
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// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
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// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
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b := !(x >= y)
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return b
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}
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func TestLogicalCompareZero(x *[64]uint64) {
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// ppc64x:"ANDCC",^"AND"
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b := x[0]&3
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if b!=0 {
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x[0] = b
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}
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// ppc64x:"ANDCC",^"AND"
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b = x[1]&x[2]
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if b!=0 {
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x[1] = b
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}
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// ppc64x:"ANDNCC",^"ANDN"
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b = x[1]&^x[2]
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if b!=0 {
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x[1] = b
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}
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// ppc64x:"ORCC",^"OR"
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b = x[3]|x[4]
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if b!=0 {
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x[3] = b
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}
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// ppc64x:"SUBCC",^"SUB"
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b = x[5]-x[6]
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if b!=0 {
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x[5] = b
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}
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// ppc64x:"NORCC",^"NOR"
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b = ^(x[5]|x[6])
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if b!=0 {
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x[5] = b
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}
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// ppc64x:"XORCC",^"XOR"
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b = x[7]^x[8]
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if b!=0 {
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x[7] = b
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}
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// ppc64x:"ADDCC",^"ADD"
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b = x[9]+x[10]
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if b!=0 {
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x[9] = b
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}
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// ppc64x:"NEGCC",^"NEG"
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b = -x[11]
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if b!=0 {
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x[11] = b
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}
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// ppc64x:"CNTLZDCC",^"CNTLZD"
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b = uint64(bits.LeadingZeros64(x[12]))
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if b!=0 {
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x[12] = b
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}
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// ppc64x:"ADDCCC\t[$]4,"
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c := int64(x[12]) + 4
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if c <= 0 {
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x[12] = uint64(c)
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}
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}
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