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cmd/compile: combine similar code in amd64's assembly generator
BSFQ/BSRQ/BSFL/BSRL/SQRTSD have similar logic in amd64's assembly generator. This CL combines them together while does not impact generated amd64 code. The total size of pkg/linux_amd64/cmd/compile/internal decreases about 1.8KB. Change-Id: I5f3210c5178c20ac9108877c69f17234baf5b6b7 Reviewed-on: https://go-review.googlesource.com/c/140438 Run-TryBot: Ben Shi <powerman1st@163.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
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@ -782,14 +782,14 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
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// Break false dependency on destination register.
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opregreg(s, x86.AXORPS, r, r)
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opregreg(s, v.Op.Asm(), r, v.Args[0].Reg())
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case ssa.OpAMD64MOVQi2f, ssa.OpAMD64MOVQf2i, ssa.OpAMD64MOVLi2f, ssa.OpAMD64MOVLf2i:
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var p *obj.Prog
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switch v.Op {
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case ssa.OpAMD64MOVQi2f, ssa.OpAMD64MOVQf2i:
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p := s.Prog(x86.AMOVQ)
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p.From.Type = obj.TYPE_REG
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p.From.Reg = v.Args[0].Reg()
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p.To.Type = obj.TYPE_REG
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p.To.Reg = v.Reg()
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p = s.Prog(x86.AMOVQ)
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case ssa.OpAMD64MOVLi2f, ssa.OpAMD64MOVLf2i:
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p := s.Prog(x86.AMOVL)
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p = s.Prog(x86.AMOVL)
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}
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p.From.Type = obj.TYPE_REG
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p.From.Reg = v.Args[0].Reg()
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p.To.Type = obj.TYPE_REG
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@ -934,24 +934,17 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
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p := s.Prog(v.Op.Asm())
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p.To.Type = obj.TYPE_REG
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p.To.Reg = r
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case ssa.OpAMD64BSFQ, ssa.OpAMD64BSRQ, ssa.OpAMD64BSFL, ssa.OpAMD64BSRL, ssa.OpAMD64SQRTSD:
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p := s.Prog(v.Op.Asm())
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p.From.Type = obj.TYPE_REG
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p.From.Reg = v.Args[0].Reg()
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p.To.Type = obj.TYPE_REG
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switch v.Op {
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case ssa.OpAMD64BSFQ, ssa.OpAMD64BSRQ:
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p := s.Prog(v.Op.Asm())
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p.From.Type = obj.TYPE_REG
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p.From.Reg = v.Args[0].Reg()
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p.To.Type = obj.TYPE_REG
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p.To.Reg = v.Reg0()
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case ssa.OpAMD64BSFL, ssa.OpAMD64BSRL:
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p := s.Prog(v.Op.Asm())
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p.From.Type = obj.TYPE_REG
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p.From.Reg = v.Args[0].Reg()
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p.To.Type = obj.TYPE_REG
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p.To.Reg = v.Reg()
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case ssa.OpAMD64SQRTSD:
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p := s.Prog(v.Op.Asm())
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p.From.Type = obj.TYPE_REG
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p.From.Reg = v.Args[0].Reg()
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p.To.Type = obj.TYPE_REG
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case ssa.OpAMD64BSFL, ssa.OpAMD64BSRL, ssa.OpAMD64SQRTSD:
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p.To.Reg = v.Reg()
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}
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case ssa.OpAMD64ROUNDSD:
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p := s.Prog(v.Op.Asm())
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val := v.AuxInt
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