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go/src/runtime/cgo/asm_arm.s

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all: make copyright headers consistent with one space after period This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-01 15:57:46 -07:00
// Copyright 2012 The Go Authors. All rights reserved.
runtime/cgo: make crosscall2 5a/6a/8a-assembled There is a #pragma dynexport crosscall2, to help SWIG, and 6l cannot export the symbol if it doesn't get to see it. R=golang-dev, iant CC=golang-dev https://golang.org/cl/7448044
2013-02-28 23:14:55 -07:00
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
runtime/cgo: use just #include "textflag.h" This will withstand the src/pkg/ to src/ move. LGTM=r R=iant, r CC=golang-codereviews https://golang.org/cl/134530044
2014-09-06 13:27:39 -06:00
#include "textflag.h"
all: change textflags from numbers to symbols. R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/12774043
2013-08-12 11:25:36 -06:00
cmd/cgo, runtime, runtime/cgo: use cgo context function Add support for the context function set by runtime.SetCgoTraceback. The context function was added in CL 17761, without support. This CL is the support. This CL has not been tested for real C code, as a working context function for C code requires unwind support that does not seem to exist. I wanted to get the CL out before the freeze. I apologize for the length of this CL. It's mostly plumbing, but unfortunately the plumbing is processor-specific. Change-Id: I8ce11a0de9b3dafcc29efd2649d776e93bff0e90 Reviewed-on: https://go-review.googlesource.com/22508 Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-04-27 15:18:29 -06:00
// Called by C code generated by cmd/cgo.
// func crosscall2(fn func(a unsafe.Pointer, n int32, ctxt uintptr), a unsafe.Pointer, n int32, ctxt uintptr)
// Saves C callee-saved registers and calls fn with three arguments.
all: change textflags from numbers to symbols. R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/12774043
2013-08-12 11:25:36 -06:00
TEXT crosscall2(SB),NOSPLIT,$-4
runtime/cgo: make crosscall2 5a/6a/8a-assembled There is a #pragma dynexport crosscall2, to help SWIG, and 6l cannot export the symbol if it doesn't get to see it. R=golang-dev, iant CC=golang-dev https://golang.org/cl/7448044
2013-02-28 23:14:55 -07:00
/*
* We still need to save all callee save register as before, and then
cmd/cgo, runtime, runtime/cgo: use cgo context function Add support for the context function set by runtime.SetCgoTraceback. The context function was added in CL 17761, without support. This CL is the support. This CL has not been tested for real C code, as a working context function for C code requires unwind support that does not seem to exist. I wanted to get the CL out before the freeze. I apologize for the length of this CL. It's mostly plumbing, but unfortunately the plumbing is processor-specific. Change-Id: I8ce11a0de9b3dafcc29efd2649d776e93bff0e90 Reviewed-on: https://go-review.googlesource.com/22508 Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-04-27 15:18:29 -06:00
* push 3 args for fn (R1, R2, R3).
Fix several out of date references to 4g/5g/6g/8g/9g. Change-Id: Ifb8e4e13c7778a7c0113190051415e096f5db94f Reviewed-on: https://go-review.googlesource.com/11390 Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Andrew Gerrand <adg@golang.org>
2015-06-23 17:50:12 -06:00
* Also note that at procedure entry in gc world, 4(R13) will be the
runtime/cgo: make crosscall2 5a/6a/8a-assembled There is a #pragma dynexport crosscall2, to help SWIG, and 6l cannot export the symbol if it doesn't get to see it. R=golang-dev, iant CC=golang-dev https://golang.org/cl/7448044
2013-02-28 23:14:55 -07:00
* first arg, so we must push another dummy reg (R0) for 0(R13).
all: remove 'extern register M *m' from runtime The runtime has historically held two dedicated values g (current goroutine) and m (current thread) in 'extern register' slots (TLS on x86, real registers backed by TLS on ARM). This CL removes the extern register m; code now uses g->m. On ARM, this frees up the register that formerly held m (R9). This is important for NaCl, because NaCl ARM code cannot use R9 at all. The Go 1 macrobenchmarks (those with per-op times >= 10 µs) are unaffected: BenchmarkBinaryTree17 5491374955 5471024381 -0.37% BenchmarkFannkuch11 4357101311 4275174828 -1.88% BenchmarkGobDecode 11029957 11364184 +3.03% BenchmarkGobEncode 6852205 6784822 -0.98% BenchmarkGzip 650795967 650152275 -0.10% BenchmarkGunzip 140962363 141041670 +0.06% BenchmarkHTTPClientServer 71581 73081 +2.10% BenchmarkJSONEncode 31928079 31913356 -0.05% BenchmarkJSONDecode 117470065 113689916 -3.22% BenchmarkMandelbrot200 6008923 5998712 -0.17% BenchmarkGoParse 6310917 6327487 +0.26% BenchmarkRegexpMatchMedium_1K 114568 114763 +0.17% BenchmarkRegexpMatchHard_1K 168977 169244 +0.16% BenchmarkRevcomp 935294971 914060918 -2.27% BenchmarkTemplate 145917123 148186096 +1.55% Minux previous reported larger variations, but these were caused by run-to-run noise, not repeatable slowdowns. Actual code changes by Minux. I only did the docs and the benchmarking. LGTM=dvyukov, iant, minux R=minux, josharian, iant, dave, bradfitz, dvyukov CC=golang-codereviews https://golang.org/cl/109050043
2014-06-26 09:54:39 -06:00
* Additionally, runtime·load_g will clobber R0, so we need to save R0
runtime/cgo: make crosscall2 5a/6a/8a-assembled There is a #pragma dynexport crosscall2, to help SWIG, and 6l cannot export the symbol if it doesn't get to see it. R=golang-dev, iant CC=golang-dev https://golang.org/cl/7448044
2013-02-28 23:14:55 -07:00
* nevertheless.
*/
runtime,runtime/cgo: save callee-saved FP register on arm Other GOARCHs already handle their callee-saved FP registers, but arm was missing. Without this change, code using Cgo and floating point code might fail in mysterious and hard to debug ways. There are no floating point registers when GOARM=5, so skip the registers when runtime.goarm < 6. darwin/arm doesn't support GOARM=5, so the check is left out of rt0_darwin_arm.s. Fixes #14876 Change-Id: I6bcb90a76df3664d8ba1f33123a74b1eb2c9f8b2 Reviewed-on: https://go-review.googlesource.com/23140 Run-TryBot: Elias Naur <elias.naur@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Minux Ma <minux@golang.org>
2016-05-16 07:51:07 -06:00
SUB $(8*9), R13 // Reserve space for the floating point registers.
cmd/cgo, runtime, runtime/cgo: use cgo context function Add support for the context function set by runtime.SetCgoTraceback. The context function was added in CL 17761, without support. This CL is the support. This CL has not been tested for real C code, as a working context function for C code requires unwind support that does not seem to exist. I wanted to get the CL out before the freeze. I apologize for the length of this CL. It's mostly plumbing, but unfortunately the plumbing is processor-specific. Change-Id: I8ce11a0de9b3dafcc29efd2649d776e93bff0e90 Reviewed-on: https://go-review.googlesource.com/22508 Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-04-27 15:18:29 -06:00
MOVM.WP [R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, g, R11, R12, R14], (R13)
runtime,runtime/cgo: save callee-saved FP register on arm Other GOARCHs already handle their callee-saved FP registers, but arm was missing. Without this change, code using Cgo and floating point code might fail in mysterious and hard to debug ways. There are no floating point registers when GOARM=5, so skip the registers when runtime.goarm < 6. darwin/arm doesn't support GOARM=5, so the check is left out of rt0_darwin_arm.s. Fixes #14876 Change-Id: I6bcb90a76df3664d8ba1f33123a74b1eb2c9f8b2 Reviewed-on: https://go-review.googlesource.com/23140 Run-TryBot: Elias Naur <elias.naur@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Minux Ma <minux@golang.org>
2016-05-16 07:51:07 -06:00
// Skip floating point registers on GOARM < 6.
MOVB runtime·goarm(SB), R11
CMP $6, R11
BLT skipfpsave
MOVD F8, (14*4+8*1)(R13)
MOVD F9, (14*4+8*2)(R13)
MOVD F10, (14*4+8*3)(R13)
MOVD F11, (14*4+8*4)(R13)
MOVD F12, (14*4+8*5)(R13)
MOVD F13, (14*4+8*6)(R13)
MOVD F14, (14*4+8*7)(R13)
MOVD F15, (14*4+8*8)(R13)
skipfpsave:
all: remove 'extern register M *m' from runtime The runtime has historically held two dedicated values g (current goroutine) and m (current thread) in 'extern register' slots (TLS on x86, real registers backed by TLS on ARM). This CL removes the extern register m; code now uses g->m. On ARM, this frees up the register that formerly held m (R9). This is important for NaCl, because NaCl ARM code cannot use R9 at all. The Go 1 macrobenchmarks (those with per-op times >= 10 µs) are unaffected: BenchmarkBinaryTree17 5491374955 5471024381 -0.37% BenchmarkFannkuch11 4357101311 4275174828 -1.88% BenchmarkGobDecode 11029957 11364184 +3.03% BenchmarkGobEncode 6852205 6784822 -0.98% BenchmarkGzip 650795967 650152275 -0.10% BenchmarkGunzip 140962363 141041670 +0.06% BenchmarkHTTPClientServer 71581 73081 +2.10% BenchmarkJSONEncode 31928079 31913356 -0.05% BenchmarkJSONDecode 117470065 113689916 -3.22% BenchmarkMandelbrot200 6008923 5998712 -0.17% BenchmarkGoParse 6310917 6327487 +0.26% BenchmarkRegexpMatchMedium_1K 114568 114763 +0.17% BenchmarkRegexpMatchHard_1K 168977 169244 +0.16% BenchmarkRevcomp 935294971 914060918 -2.27% BenchmarkTemplate 145917123 148186096 +1.55% Minux previous reported larger variations, but these were caused by run-to-run noise, not repeatable slowdowns. Actual code changes by Minux. I only did the docs and the benchmarking. LGTM=dvyukov, iant, minux R=minux, josharian, iant, dave, bradfitz, dvyukov CC=golang-codereviews https://golang.org/cl/109050043
2014-06-26 09:54:39 -06:00
BL runtime·load_g(SB)
[dev.cc] runtime/cgo: change PC to R15 in asm_arm.s R15 is the real register. PC is a pseudo-register that we are making illegal in this context as part of the grand assembly unification. Change-Id: Ie0ea38ce7ef4d2cf4fcbe23b851a570fd312ce8d Reviewed-on: https://go-review.googlesource.com/4966 Reviewed-by: Minux Ma <minux@golang.org>
2015-02-17 10:49:57 -07:00
MOVW R15, R14 // R15 is PC.
MOVW 0(R13), R15
runtime,runtime/cgo: save callee-saved FP register on arm Other GOARCHs already handle their callee-saved FP registers, but arm was missing. Without this change, code using Cgo and floating point code might fail in mysterious and hard to debug ways. There are no floating point registers when GOARM=5, so skip the registers when runtime.goarm < 6. darwin/arm doesn't support GOARM=5, so the check is left out of rt0_darwin_arm.s. Fixes #14876 Change-Id: I6bcb90a76df3664d8ba1f33123a74b1eb2c9f8b2 Reviewed-on: https://go-review.googlesource.com/23140 Run-TryBot: Elias Naur <elias.naur@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Minux Ma <minux@golang.org>
2016-05-16 07:51:07 -06:00
MOVB runtime·goarm(SB), R11
CMP $6, R11
BLT skipfprest
MOVD (14*4+8*1)(R13), F8
MOVD (14*4+8*2)(R13), F9
MOVD (14*4+8*3)(R13), F10
MOVD (14*4+8*4)(R13), F11
MOVD (14*4+8*5)(R13), F12
MOVD (14*4+8*6)(R13), F13
MOVD (14*4+8*7)(R13), F14
MOVD (14*4+8*8)(R13), F15
skipfprest:
MOVM.IAW (R13), [R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, g, R11, R12, R14]
ADD $(8*9), R13
MOVW R14, R15
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