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cmd/compile: get MIPS64 SSA working

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- implement *, /, %, shifts, Zero, Move.
- fix mistakes in comparison.
- fix floating point rounding.
- handle RetJmp in assembler (which was not handled, as a consequence
  Duff's device was disabled in the old backend.)

all.bash now passes with SSA on.

Updates #16359.

Change-Id: Ia14eed0ed1176b5d800592080c8f53dded7fe73f
Reviewed-on: https://go-review.googlesource.com/27592
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Cherry Zhang 2016-08-22 12:25:23 -04:00
parent e90ae90b7a
commit e71e1fe87e
10 changed files with 3872 additions and 197 deletions
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50
src/cmd/internal/obj/mips/obj0.go
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@ -400,19 +400,23 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
break
}
if p.To.Sym != nil { // retjmp
p.As = AJMP
p.To.Type = obj.TYPE_BRANCH
break
}
retSym := p.To.Sym
p.To.Name = obj.NAME_NONE // clear fields as we may modify p to other instruction
p.To.Sym = nil
if cursym.Text.Mark&LEAF != 0 {
if autosize == 0 {
p.As = AJMP
p.From = obj.Addr{}
p.To.Type = obj.TYPE_MEM
p.To.Offset = 0
p.To.Reg = REGLINK
if retSym != nil { // retjmp
p.To.Type = obj.TYPE_BRANCH
p.To.Name = obj.NAME_EXTERN
p.To.Sym = retSym
} else {
p.To.Type = obj.TYPE_MEM
p.To.Reg = REGLINK
p.To.Offset = 0
}
p.Mark |= BRANCH
break
}
@ -444,22 +448,8 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
p.From.Reg = REGSP
p.To.Type = obj.TYPE_REG
p.To.Reg = REG_R4
if false {
// Debug bad returns
q = ctxt.NewProg()
q.As = AMOVV
q.Lineno = p.Lineno
q.From.Type = obj.TYPE_MEM
q.From.Offset = 0
q.From.Reg = REG_R4
q.To.Type = obj.TYPE_REG
q.To.Reg = REGTMP
q.Link = p.Link
p.Link = q
p = q
if retSym != nil { // retjmp from non-leaf, need to restore LINK register
p.To.Reg = REGLINK
}
if autosize != 0 {
@ -479,9 +469,15 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
q1 = ctxt.NewProg()
q1.As = AJMP
q1.Lineno = p.Lineno
q1.To.Type = obj.TYPE_MEM
q1.To.Offset = 0
q1.To.Reg = REG_R4
if retSym != nil { // retjmp
q1.To.Type = obj.TYPE_BRANCH
q1.To.Name = obj.NAME_EXTERN
q1.To.Sym = retSym
} else {
q1.To.Type = obj.TYPE_MEM
q1.To.Offset = 0
q1.To.Reg = REG_R4
}
q1.Mark |= BRANCH
q1.Spadj = +autosize