diff options
Diffstat (limited to 'src/cmd/internal/obj/util.go')
| -rw-r--r-- | src/cmd/internal/obj/util.go | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/src/cmd/internal/obj/util.go b/src/cmd/internal/obj/util.go index 9b440ebd58..4349f4d741 100644 --- a/src/cmd/internal/obj/util.go +++ b/src/cmd/internal/obj/util.go @@ -222,6 +222,11 @@ func (ctxt *Link) CanReuseProgs() bool { return ctxt.Debugasm == 0 } +func isZReg(r int) bool { + return (r >= RBaseARM64+96 && r <= RBaseARM64+127) || + (r >= RBaseARM64+2048 && r < RBaseARM64+3072) +} + // Dconv accepts an argument 'a' within a prog 'p' and returns a string // with a formatted version of the argument. func Dconv(p *Prog, a *Addr) string { @@ -297,13 +302,35 @@ func writeDconv(w io.Writer, p *Prog, a *Addr, abiDetail bool) { a.writeNameTo(w, abiDetail) case TYPE_MEM: - a.WriteNameTo(w) - if a.Index != REG_NONE { - if a.Scale == 0 { - // arm64 shifted or extended register offset, scale = 0. - fmt.Fprintf(w, "(%v)", Rconv(int(a.Index))) - } else { - fmt.Fprintf(w, "(%v*%d)", Rconv(int(a.Index)), int(a.Scale)) + if buildcfg.GOARCH == "arm64" && (a.Scale < 0 || isZReg(int(a.Reg)) || isZReg(int(a.Index))) { + // SVE extended addressing pattern + amount := 0 + mod := 0 + if a.Scale < 0 { + amount = int((a.Scale >> 12) & 0x7) + mod = int((a.Scale >> 9) & 0x7) + } + modStr := "" + switch mod { + case 1: + modStr = ".UXTW" + case 2: + modStr = ".SXTW" + } + amountStr := "" + if amount != 0 { + amountStr = fmt.Sprintf("<<%d", amount) + } + fmt.Fprintf(w, "(%v%s%s)(%v)", Rconv(int(a.Reg)), modStr, amountStr, Rconv(int(a.Index))) + } else { + a.WriteNameTo(w) + if a.Index != REG_NONE { + if a.Scale == 0 { + // arm64 shifted or extended register offset, scale = 0. + fmt.Fprintf(w, "(%v)", Rconv(int(a.Index))) + } else { + fmt.Fprintf(w, "(%v*%d)", Rconv(int(a.Index)), int(a.Scale)) + } } } |