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cmd/internal/obj/x86: add support for TSX instructions

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Transactional memory, will later be used for semaphore implementation.
Nacl not supported yet.

Change-Id: Ic18453dcaa08d07bb217c0b95461584f007d518b
Reviewed-on: https://go-review.googlesource.com/16479
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
sergey.arseev 2015-11-02 14:53:31 +03:00 committed by Russ Cox
parent 21efa7b2bc
commit e9081b3c76
4 changed files with 43 additions and 4 deletions
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2
src/cmd/asm/internal/arch/arch.go
View File

@ -87,7 +87,7 @@ func Set(GOARCH string) *Arch {
}
func jumpX86(word string) bool {
return word[0] == 'J' || word == "CALL" || strings.HasPrefix(word, "LOOP")
return word[0] == 'J' || word == "CALL" || strings.HasPrefix(word, "LOOP") || word == "XBEGIN"
}
func archX86(linkArch *obj.LinkArch) *Arch {

8
src/cmd/internal/obj/x86/a.out.go
View File

@ -768,6 +768,14 @@ const (
AFUCOMI
AFUCOMIP
// TSX
AXACQUIRE
AXRELEASE
AXBEGIN
AXEND
AXABORT
AXTEST
ALAST
)

6
src/cmd/internal/obj/x86/anames.go
View File

@ -706,5 +706,11 @@ var Anames = []string{
"FCOMIP",
"FUCOMI",
"FUCOMIP",
"XACQUIRE",
"XRELEASE",
"XBEGIN",
"XEND",
"XABORT",
"XTEST",
"LAST",
}

31
src/cmd/internal/obj/x86/asm6.go
View File

@ -757,6 +757,14 @@ var yaes2 = []ytab{
{Yu8, Yxm, Yxr, Zibm_r, 2},
}
var yxbegin = []ytab{
{Ynone, Ynone, Ybr, Zjmp, 1},
}
var yxabort = []ytab{
{Yu8, Ynone, Ynone, Zib_, 1},
}
/*
* You are doasm, holding in your hand a Prog* with p->as set to, say, ACRC32,
* and p->from and p->to as operands (Addr*). The linker scans optab to find
@ -1519,6 +1527,12 @@ var optab =
{AVPAND, yxm_xm_xm, Pvex1, [23]uint8{0xdb, 0xdb}},
{AVPBROADCASTB, yml_xr_vex, Pvex3, [23]uint8{0x78, 0x78}},
{AVPTEST, yml_xr_vex, Pvex3, [23]uint8{0x17, 0x17}},
{AXACQUIRE, ynone, Px, [23]uint8{0xf2}},
{AXRELEASE, ynone, Px, [23]uint8{0xf3}},
{AXBEGIN, yxbegin, Px, [23]uint8{0xc7, 0xf8}},
{AXABORT, yxabort, Px, [23]uint8{0xc6, 0xf8}},
{AXEND, ynone, Px, [23]uint8{0x0f, 01, 0xd5}},
{AXTEST, ynone, Px, [23]uint8{0x0f, 01, 0xd6}},
{obj.AUSEFIELD, ynop, Px, [23]uint8{0, 0}},
{obj.ATYPE, nil, 0, [23]uint8{}},
{obj.AFUNCDATA, yfuncdata, Px, [23]uint8{0, 0}},
@ -1729,7 +1743,7 @@ func span6(ctxt *obj.Link, s *obj.LSym) {
q.Back ^= 2
}
if q.As == AJCXZL {
if q.As == AJCXZL || q.As == AXBEGIN {
s.P[q.Pc+2] = byte(v)
} else {
s.P[q.Pc+1] = byte(v)
@ -3432,6 +3446,10 @@ func doasm(ctxt *obj.Link, p *obj.Prog) {
}
ctxt.Andptr[0] = byte(op)
ctxt.Andptr = ctxt.Andptr[1:]
if p.As == AXABORT {
ctxt.Andptr[0] = byte(o.op[z+1])
ctxt.Andptr = ctxt.Andptr[1:]
}
ctxt.Andptr[0] = byte(vaddr(ctxt, p, a, nil))
ctxt.Andptr = ctxt.Andptr[1:]
@ -3653,6 +3671,10 @@ func doasm(ctxt *obj.Link, p *obj.Prog) {
// TODO: jump across functions needs reloc
case Zbr, Zjmp, Zloop:
if p.As == AXBEGIN {
ctxt.Andptr[0] = byte(op)
ctxt.Andptr = ctxt.Andptr[1:]
}
if p.To.Sym != nil {
if yt.zcase != Zjmp {
ctxt.Diag("branch to ATEXT")
@ -3683,7 +3705,7 @@ func doasm(ctxt *obj.Link, p *obj.Prog) {
if p.Back&1 != 0 {
v = q.Pc - (p.Pc + 2)
if v >= -128 {
if v >= -128 && p.As != AXBEGIN {
if p.As == AJCXZL {
ctxt.Andptr[0] = 0x67
ctxt.Andptr = ctxt.Andptr[1:]
@ -3696,6 +3718,9 @@ func doasm(ctxt *obj.Link, p *obj.Prog) {
ctxt.Diag("loop too far: %v", p)
} else {
v -= 5 - 2
if p.As == AXBEGIN {
v--
}
if yt.zcase == Zbr {
ctxt.Andptr[0] = 0x0f
ctxt.Andptr = ctxt.Andptr[1:]
@ -3721,7 +3746,7 @@ func doasm(ctxt *obj.Link, p *obj.Prog) {
p.Forwd = q.Rel
q.Rel = p
if p.Back&2 != 0 { // short
if p.Back&2 != 0 && p.As != AXBEGIN { // short
if p.As == AJCXZL {
ctxt.Andptr[0] = 0x67
ctxt.Andptr = ctxt.Andptr[1:]