qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-14 14:00:25 -07:00
Code Releases Activity
7e4d1a05e5
go/test/intrinsic.go

9 lines
259 B
Go
Raw Normal View History

cmd/compile: added some intrinsics to SSA back end One intrinsic was needed to help get the very best performance out of a future GC; as long as that one was being added, I also added Bswap since that is sometimes a handy thing to have. I had intended to fill out the bit-scan intrinsic family, but the mismatch between the "scan forward" instruction and "count leading zeroes" was large enough to cause me to leave it out -- it poses a dilemma that I'd rather dodge right now. These intrinsics are not exposed for general use. That's a separate issue requiring an API proposal change ( https://github.com/golang/proposal ) All intrinsics are tested, both that they are substituted on the appropriate architecture, and that they produce the expected result. Change-Id: I5848037cfd97de4f75bdc33bdd89bba00af4a8ee Reviewed-on: https://go-review.googlesource.com/20564 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-10 22:10:52 -07:00
// errorcheckandrundir -0 -d=ssa/intrinsics/debug
cmd/compile: intrinsify Ctz{32,64} and Bswap{32,64} on s390x Also adds the 'find leftmost one' instruction (FLOGR) and replaces the WORD-encoded use of FLOGR in math/big with it. Change-Id: I18e7cd19e75b8501a6ae8bd925471f7e37ded206 Reviewed-on: https://go-review.googlesource.com/29372 Reviewed-by: Cherry Zhang <cherryyz@google.com> Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-09-16 19:42:18 -06:00
// +build amd64 arm64 arm s390x
cmd/compile: added some intrinsics to SSA back end One intrinsic was needed to help get the very best performance out of a future GC; as long as that one was being added, I also added Bswap since that is sometimes a handy thing to have. I had intended to fill out the bit-scan intrinsic family, but the mismatch between the "scan forward" instruction and "count leading zeroes" was large enough to cause me to leave it out -- it poses a dilemma that I'd rather dodge right now. These intrinsics are not exposed for general use. That's a separate issue requiring an API proposal change ( https://github.com/golang/proposal ) All intrinsics are tested, both that they are substituted on the appropriate architecture, and that they produce the expected result. Change-Id: I5848037cfd97de4f75bdc33bdd89bba00af4a8ee Reviewed-on: https://go-review.googlesource.com/20564 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-10 22:10:52 -07:00
// Copyright 2016 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 ignored
Copy Permalink