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runtime: remove duff support for amd64

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Change-Id: I742b49a3889892b7b1bb354f47f1c0d933c041e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/682395
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Keith Randall 2025-06-17 10:56:53 -07:00 • committed by Gopher Robot
parent e4291e484c
commit a651e2ea47
3 changed files with 0 additions and 453 deletions
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25
src/cmd/internal/obj/x86/asm6.go
View file

@ -4013,15 +4013,6 @@ func (ab *AsmBuf) mediaop(ctxt *obj.Link, o *Optab, op int, osize int, z int) in
return z return z
} }
var bpduff1 = []byte{
0x48, 0x89, 0x6c, 0x24, 0xf0, // MOVQ BP, -16(SP)
0x48, 0x8d, 0x6c, 0x24, 0xf0, // LEAQ -16(SP), BP
}
var bpduff2 = []byte{
0x48, 0x8b, 0x6d, 0x00, // MOVQ 0(BP), BP
}
// asmevex emits EVEX pregis and opcode byte. // asmevex emits EVEX pregis and opcode byte.
// In addition to asmvex r/m, vvvv and reg fields also requires optional // In addition to asmvex r/m, vvvv and reg fields also requires optional
// K-masking register. // K-masking register.
@ -4859,16 +4850,6 @@ func (ab *AsmBuf) doasm(ctxt *obj.Link, cursym *obj.LSym, p *obj.Prog) {
ctxt.Diag("directly calling duff when dynamically linking Go") ctxt.Diag("directly calling duff when dynamically linking Go")
} }
if yt.zcase == Zcallduff && ctxt.Arch.Family == sys.AMD64 {
// Maintain BP around call, since duffcopy/duffzero can't do it
// (the call jumps into the middle of the function).
// This makes it possible to see call sites for duffcopy/duffzero in
// BP-based profiling tools like Linux perf (which is the
// whole point of maintaining frame pointers in Go).
// MOVQ BP, -16(SP)
// LEAQ -16(SP), BP
ab.Put(bpduff1)
}
ab.Put1(byte(op)) ab.Put1(byte(op))
cursym.AddRel(ctxt, obj.Reloc{ cursym.AddRel(ctxt, obj.Reloc{
Type: objabi.R_CALL, Type: objabi.R_CALL,
@ -4879,12 +4860,6 @@ func (ab *AsmBuf) doasm(ctxt *obj.Link, cursym *obj.LSym, p *obj.Prog) {
}) })
ab.PutInt32(0) ab.PutInt32(0)
if yt.zcase == Zcallduff && ctxt.Arch.Family == sys.AMD64 {
// Pop BP pushed above.
// MOVQ 0(BP), BP
ab.Put(bpduff2)
}
// TODO: jump across functions needs reloc // TODO: jump across functions needs reloc
case Zbr, Zjmp, Zloop: case Zbr, Zjmp, Zloop:
if p.As == AXBEGIN { if p.As == AXBEGIN {

427
src/runtime/duff_amd64.s
View file

@ -1,427 +0,0 @@
// Code generated by mkduff.go; DO NOT EDIT.
// Run go generate from src/runtime to update.
// See mkduff.go for comments.
#include "textflag.h"
TEXT runtime·duffzero<ABIInternal>(SB), NOSPLIT|NOFRAME, $0-0
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
MOVUPS X15,(DI)
MOVUPS X15,16(DI)
MOVUPS X15,32(DI)
MOVUPS X15,48(DI)
LEAQ 64(DI),DI
RET
TEXT runtime·duffcopy<ABIInternal>(SB), NOSPLIT|NOFRAME, $0-0
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
MOVUPS (SI), X0
ADDQ $16, SI
MOVUPS X0, (DI)
ADDQ $16, DI
RET

1
src/runtime/mkduff.go
View file

@ -32,7 +32,6 @@ import (
) )
func main() { func main() {
gen("amd64", notags, zeroAMD64, copyAMD64)
gen("386", notags, zero386, copy386) gen("386", notags, zero386, copy386)
gen("arm", notags, zeroARM, copyARM) gen("arm", notags, zeroARM, copyARM)
gen("loong64", notags, zeroLOONG64, copyLOONG64) gen("loong64", notags, zeroLOONG64, copyLOONG64)