author | Shawn Walker-Salas <shawn.walker@oracle.com> |
Thu, 14 Apr 2016 12:48:37 -0700 | |
changeset 5781 | ecbdf40c0a37 |
parent 5331 | 9c955076ffe3 |
permissions | -rw-r--r-- |
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From 23c646c226e9820c30fba29ebef94d7e328ada83 Mon Sep 17 00:00:00 2001 |
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From: Rob Pike <[email protected]> |
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Date: Wed, 2 Sep 2015 13:11:26 -0700 |
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Subject: [PATCH 21/63] [release-branch.go1.5] cmd/asm: handle CMPF and CMPD on |
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ARM |
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These instructions are special cases that were missed in the translation. |
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The second argument must go into the Reg field not the To field. |
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Fixes #12458 |
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For Go 1.5.1 |
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Change-Id: Iad57c60c7e38e3bcfafda483ed5037ce670e8816 |
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Reviewed-on: https://go-review.googlesource.com/14183 |
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Reviewed-by: Dave Cheney <[email protected]> |
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Reviewed-by: Russ Cox <[email protected]> |
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Reviewed-on: https://go-review.googlesource.com/14358 |
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Reviewed-by: Chris Broadfoot <[email protected]> |
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Reviewed-by: Rob Pike <[email protected]> |
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--- |
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src/cmd/asm/internal/arch/arm.go | 9 +++++++++ |
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src/cmd/asm/internal/asm/asm.go | 5 +++++ |
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src/cmd/asm/internal/asm/testdata/arm.out | 4 +++- |
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src/cmd/asm/internal/asm/testdata/arm.s | 4 ++++ |
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4 files changed, 21 insertions(+), 1 deletion(-) |
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diff --git a/src/cmd/asm/internal/arch/arm.go b/src/cmd/asm/internal/arch/arm.go |
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index c030214..8df994e 100644 |
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--- a/src/cmd/asm/internal/arch/arm.go |
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+++ b/src/cmd/asm/internal/arch/arm.go |
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@@ -121,6 +121,15 @@ func IsARMMRC(op int) bool { |
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return false |
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} |
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+// IsARMFloatCmp reports whether the op is a floating comparison instruction. |
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+func IsARMFloatCmp(op int) bool { |
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+ switch op { |
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+ case arm.ACMPF, arm.ACMPD: |
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+ return true |
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+ } |
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+ return false |
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+} |
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+ |
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// ARMMRCOffset implements the peculiar encoding of the MRC and MCR instructions. |
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// The difference between MRC and MCR is represented by a bit high in the word, not |
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// in the usual way by the opcode itself. Asm must use AMRC for both instructions, so |
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diff --git a/src/cmd/asm/internal/asm/asm.go b/src/cmd/asm/internal/asm/asm.go |
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index 7ac8bf4..3563c1a 100644 |
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--- a/src/cmd/asm/internal/asm/asm.go |
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+++ b/src/cmd/asm/internal/asm/asm.go |
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@@ -463,6 +463,11 @@ func (p *Parser) asmInstruction(op int, cond string, a []obj.Addr) { |
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} |
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p.errorf("unrecognized addressing for %s", obj.Aconv(op)) |
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} |
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+ if arch.IsARMFloatCmp(op) { |
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+ prog.From = a[0] |
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+ prog.Reg = p.getRegister(prog, op, &a[1]) |
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+ break |
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+ } |
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} else if p.arch.Thechar == '7' && arch.IsARM64CMP(op) { |
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prog.From = a[0] |
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prog.Reg = p.getRegister(prog, op, &a[1]) |
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diff --git a/src/cmd/asm/internal/asm/testdata/arm.out b/src/cmd/asm/internal/asm/testdata/arm.out |
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index 7501db3..1af3999 100644 |
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--- a/src/cmd/asm/internal/asm/testdata/arm.out |
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+++ b/src/cmd/asm/internal/asm/testdata/arm.out |
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@@ -56,4 +56,6 @@ |
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281 00056 (testdata/arm.s:281) CALL foo(SB) |
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282 00057 (testdata/arm.s:282) JMP foo(SB) |
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283 00058 (testdata/arm.s:283) CALL foo(SB) |
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-292 00059 (testdata/arm.s:292) END |
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+286 00059 (testdata/arm.s:286) CMPF F1, F2 |
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+287 00060 (testdata/arm.s:287) CMPD F1, F2 |
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+296 00061 (testdata/arm.s:296) END |
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diff --git a/src/cmd/asm/internal/asm/testdata/arm.s b/src/cmd/asm/internal/asm/testdata/arm.s |
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index b8bdfb2..95fee50 100644 |
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--- a/src/cmd/asm/internal/asm/testdata/arm.s |
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+++ b/src/cmd/asm/internal/asm/testdata/arm.s |
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@@ -282,6 +282,10 @@ TEXT foo(SB), 0, $0 |
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JMP foo(SB) |
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CALL foo(SB) |
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+// CMPF and CMPD are special. |
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+ CMPF F1, F2 |
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+ CMPD F1, F2 |
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+ |
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// |
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// END |
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// |
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-- |
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2.6.1 |
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