diff options
Diffstat (limited to 'libgo/go/runtime/mkpreempt.go')
| -rw-r--r-- | libgo/go/runtime/mkpreempt.go | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/libgo/go/runtime/mkpreempt.go b/libgo/go/runtime/mkpreempt.go index 8644973..f82df93 100644 --- a/libgo/go/runtime/mkpreempt.go +++ b/libgo/go/runtime/mkpreempt.go @@ -2,6 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. +//go:build ignore // +build ignore // mkpreempt generates the asyncPreempt functions for each @@ -123,6 +124,7 @@ func header(arch string) { fmt.Fprintf(out, "// Code generated by mkpreempt.go; DO NOT EDIT.\n\n") if beLe[arch] { base := arch[:len(arch)-1] + fmt.Fprintf(out, "//go:build %s || %sle\n", base, base) fmt.Fprintf(out, "// +build %s %sle\n\n", base, base) } fmt.Fprintf(out, "#include \"go_asm.h\"\n") @@ -230,12 +232,16 @@ func genAMD64() { if reg == "SP" || reg == "BP" { continue } - if strings.HasPrefix(reg, "X") { - l.add("MOVUPS", reg, 16) - } else { + if !strings.HasPrefix(reg, "X") { l.add("MOVQ", reg, 8) } } + lSSE := layout{stack: l.stack, sp: "SP"} + for _, reg := range regNamesAMD64 { + if strings.HasPrefix(reg, "X") { + lSSE.add("MOVUPS", reg, 16) + } + } // TODO: MXCSR register? @@ -244,10 +250,12 @@ func genAMD64() { p("// Save flags before clobbering them") p("PUSHFQ") p("// obj doesn't understand ADD/SUB on SP, but does understand ADJSP") - p("ADJSP $%d", l.stack) + p("ADJSP $%d", lSSE.stack) p("// But vet doesn't know ADJSP, so suppress vet stack checking") p("NOP SP") + l.save() + // Apparently, the signal handling code path in darwin kernel leaves // the upper bits of Y registers in a dirty state, which causes // many SSE operations (128-bit and narrower) become much slower. @@ -259,10 +267,11 @@ func genAMD64() { p("VZEROUPPER") p("#endif") - l.save() + lSSE.save() p("CALL ·asyncPreempt2(SB)") + lSSE.restore() l.restore() - p("ADJSP $%d", -l.stack) + p("ADJSP $%d", -lSSE.stack) p("POPFQ") p("POPQ BP") p("RET") |