Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

all: drop 387 support

Browse source 
My last 387 CL. So sad ... ... ... ... not!

Fixes #40255

Change-Id: I8d4ddb744b234b8adc735db2f7c3c7b6d8bbdfa4
Reviewed-on: https://go-review.googlesource.com/c/go/+/258957
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Keith Randall 2020-10-01 14:49:33 -07:00
parent 41df0e2218
commit fe2cfb74ba
36 changed files with 97 additions and 796 deletions
Download patch file Download diff file Expand all files Collapse all files

14
src/cmd/compile/internal/ssa/regalloc.go
View file

@ -625,9 +625,6 @@ func (s *regAllocState) init(f *Func) {
s.f.fe.Fatalf(src.NoXPos, "arch %s not implemented", s.f.Config.arch)
}
}
if s.f.Config.use387 {
s.allocatable &^= 1 << 15 // X7 disallowed (one 387 register is used as scratch space during SSE->387 generation in ../x86/387.go)
}
// Linear scan register allocation can be influenced by the order in which blocks appear.
// Decouple the register allocation order from the generated block order.
@ -1024,9 +1021,6 @@ func (s *regAllocState) regalloc(f *Func) {
if phiRegs[i] != noRegister {
continue
}
if s.f.Config.use387 && v.Type.IsFloat() {
continue // 387 can't handle floats in registers between blocks
}
m := s.compatRegs(v.Type) &^ phiUsed &^ s.used
if m != 0 {
r := pickReg(m)
@ -1528,11 +1522,6 @@ func (s *regAllocState) regalloc(f *Func) {
s.freeUseRecords = u
}
// Spill any values that can't live across basic block boundaries.
if s.f.Config.use387 {
s.freeRegs(s.f.Config.fpRegMask)
}
// If we are approaching a merge point and we are the primary
// predecessor of it, find live values that we use soon after
// the merge point and promote them to registers now.
@ -1562,9 +1551,6 @@ func (s *regAllocState) regalloc(f *Func) {
continue
}
v := s.orig[vid]
if s.f.Config.use387 && v.Type.IsFloat() {
continue // 387 can't handle floats in registers between blocks
}
m := s.compatRegs(v.Type) &^ s.used
if m&^desired.avoid != 0 {
m &^= desired.avoid