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| author | limeidan <limeidan@loongson.cn> | 2025-08-21 19:46:47 +0800 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2025-08-21 11:21:59 -0700 |
| commit | e0870a0a121c22899208d80e81310d247c54f198 (patch) | |
| tree | 831ea6a90363fed2674fa752460512211dcc4803 /src/cmd/compile | |
| parent | fb8bbe46d5329a6ec502564f7ac3cb2e2c28df8b (diff) | |
| download | go-e0870a0a121c22899208d80e81310d247c54f198.tar.xz | |
cmd/compile: simplify zerorange on loong64
Refer to CL 678936, we also did the same thing on loong64.
Change-Id: I156a9110a034878192f64baf8018115424aa5f0a
Reviewed-on: https://go-review.googlesource.com/c/go/+/697957
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'src/cmd/compile')
| -rw-r--r-- | src/cmd/compile/internal/loong64/ggen.go | 38 |
1 files changed, 6 insertions, 32 deletions
diff --git a/src/cmd/compile/internal/loong64/ggen.go b/src/cmd/compile/internal/loong64/ggen.go index 27d318a8bb..bb1b146346 100644 --- a/src/cmd/compile/internal/loong64/ggen.go +++ b/src/cmd/compile/internal/loong64/ggen.go @@ -6,49 +6,23 @@ package loong64 import ( "cmd/compile/internal/base" - "cmd/compile/internal/ir" "cmd/compile/internal/objw" - "cmd/compile/internal/types" "cmd/internal/obj" "cmd/internal/obj/loong64" ) func zerorange(pp *objw.Progs, p *obj.Prog, off, cnt int64, _ *uint32) *obj.Prog { - if cnt == 0 { - return p + if cnt%8 != 0 { + panic("zeroed region not aligned") } // Adjust the frame to account for LR. off += base.Ctxt.Arch.FixedFrameSize - if cnt < int64(4*types.PtrSize) { - for i := int64(0); i < cnt; i += int64(types.PtrSize) { - p = pp.Append(p, loong64.AMOVV, obj.TYPE_REG, loong64.REGZERO, 0, obj.TYPE_MEM, loong64.REGSP, off+i) - } - } else if cnt <= int64(128*types.PtrSize) { - p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, off, obj.TYPE_REG, loong64.REGRT1, 0) - p.Reg = loong64.REGSP - p = pp.Append(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0) - p.To.Name = obj.NAME_EXTERN - p.To.Sym = ir.Syms.Duffzero - p.To.Offset = 8 * (128 - cnt/int64(types.PtrSize)) - } else { - // ADDV $(off), SP, r1 - // ADDV $cnt, r1, r2 - // loop: - // MOVV R0, (r1) - // ADDV $Widthptr, r1 - // BNE r1, r2, loop - p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, off, obj.TYPE_REG, loong64.REGRT1, 0) - p.Reg = loong64.REGSP - p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, loong64.REGRT2, 0) - p.Reg = loong64.REGRT1 - p = pp.Append(p, loong64.AMOVV, obj.TYPE_REG, loong64.REGZERO, 0, obj.TYPE_MEM, loong64.REGRT1, 0) - loop := p - p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, int64(types.PtrSize), obj.TYPE_REG, loong64.REGRT1, 0) - p = pp.Append(p, loong64.ABNE, obj.TYPE_REG, loong64.REGRT1, 0, obj.TYPE_BRANCH, 0, 0) - p.Reg = loong64.REGRT2 - p.To.SetTarget(loop) + for cnt != 0 { + p = pp.Append(p, loong64.AMOVV, obj.TYPE_REG, loong64.REGZERO, 0, obj.TYPE_MEM, loong64.REGSP, off) + off += 8 + cnt -= 8 } return p |