diff options
Diffstat (limited to 'src/cmd/compile/internal/riscv64/ggen.go')
| -rw-r--r-- | src/cmd/compile/internal/riscv64/ggen.go | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/riscv64/ggen.go b/src/cmd/compile/internal/riscv64/ggen.go index be31fad441..f7c03fe7c2 100644 --- a/src/cmd/compile/internal/riscv64/ggen.go +++ b/src/cmd/compile/internal/riscv64/ggen.go @@ -25,7 +25,15 @@ func zeroRange(pp *gc.Progs, p *obj.Prog, off, cnt int64, _ *uint32) *obj.Prog { return p } - // TODO(jsing): Add a duff zero implementation for medium sized ranges. + if cnt <= int64(128*gc.Widthptr) { + p = pp.Appendpp(p, riscv.AADDI, obj.TYPE_CONST, 0, off, obj.TYPE_REG, riscv.REG_A0, 0) + p.Reg = riscv.REG_SP + p = pp.Appendpp(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0) + p.To.Name = obj.NAME_EXTERN + p.To.Sym = gc.Duffzero + p.To.Offset = 8 * (128 - cnt/int64(gc.Widthptr)) + return p + } // Loop, zeroing pointer width bytes at a time. // ADD $(off), SP, T0 |