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In the PPC64 ISA, the instruction to do an 'and' operation using an immediate constant is only available in the form that also sets CR0 (i.e. clobbers the condition register.) This means CR0 is being clobbered unnecessarily in many cases. That affects some decisions made during some compiler passes that check for it. In those cases when the constant used by the ANDCC is a right justified consecutive set of bits, a shift instruction can be used which has the same effect if CR0 does not need to be set. The rule to do that has been added to the late rules file after other rules using ANDCCconst have been processed in the main rules file. Some codegen tests had to be updated since ANDCC is no longer generated for some cases. A new test case was added to verify the ANDCC is present if the results for both the AND and CR0 are used. Change-Id: I304f607c039a458e2d67d25351dd00aea72ba542 Reviewed-on: https://go-review.googlesource.com/c/go/+/531435 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> Reviewed-by: Paul Murphy <murp@ibm.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: Jayanth Krishnamurthy <jayanth.krishnamurthy@ibm.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
222 lines
6 KiB
Go
222 lines
6 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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// 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 TestAndCompareZero(x uint64, y uint64) uint64 {
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// ppc64x:"ANDCC"
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b := x&3
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if b!=0 {
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return b
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}
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return b+8
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}
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