runtime, cmd/compile, cmd/internal/obj: remove duff support for loong64

Change-Id: I44d6452933c8010f7dfbf821a32053f9d1cf151e
Reviewed-on: https://go-review.googlesource.com/c/go/+/700096
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>

3 files changed, 0 insertions, 78 deletions

diff --git a/src/cmd/compile/internal/loong64/ssa.go b/src/cmd/compile/internal/loong64/ssa.go
index 3959f8a7c1..134575c85c 100644
--- a/src/cmd/compile/internal/loong64/ssa.go
+++ b/src/cmd/compile/internal/loong64/ssa.go
@@ -552,13 +552,6 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
 		p.To.Type = obj.TYPE_REG
 		p.To.Reg = v.Reg()
 
-	case ssa.OpLOONG64DUFFZERO:
-		// runtime.duffzero expects start address in R20
-		p := s.Prog(obj.ADUFFZERO)
-		p.To.Type = obj.TYPE_MEM
-		p.To.Name = obj.NAME_EXTERN
-		p.To.Sym = ir.Syms.Duffzero
-		p.To.Offset = v.AuxInt
 	case ssa.OpLOONG64LoweredZero:
 		ptrReg := v.Args[0].Reg()
 		n := v.AuxInt
@@ -652,12 +645,6 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
 			zero8(s, ptrReg, off+n-8)
 		}
 
-	case ssa.OpLOONG64DUFFCOPY:
-		p := s.Prog(obj.ADUFFCOPY)
-		p.To.Type = obj.TYPE_MEM
-		p.To.Name = obj.NAME_EXTERN
-		p.To.Sym = ir.Syms.Duffcopy
-		p.To.Offset = v.AuxInt
 	case ssa.OpLOONG64LoweredMove:
 		dstReg := v.Args[0].Reg()
 		srcReg := v.Args[1].Reg()
diff --git a/src/cmd/compile/internal/ssa/_gen/LOONG64Ops.go b/src/cmd/compile/internal/ssa/_gen/LOONG64Ops.go
index cc6ae8fb8e..bee619f6d9 100644
--- a/src/cmd/compile/internal/ssa/_gen/LOONG64Ops.go
+++ b/src/cmd/compile/internal/ssa/_gen/LOONG64Ops.go
@@ -360,24 +360,6 @@ func init() {
 		{name: "CALLclosure", argLength: -1, reg: regInfo{inputs: []regMask{gpsp, buildReg("R29"), 0}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call function via closure.  arg0=codeptr, arg1=closure, last arg=mem, auxint=argsize, returns mem
 		{name: "CALLinter", argLength: -1, reg: regInfo{inputs: []regMask{gp}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true},                         // call fn by pointer.  arg0=codeptr, last arg=mem, auxint=argsize, returns mem
 
-		// duffzero
-		// arg0 = address of memory to zero
-		// arg1 = mem
-		// auxint = offset into duffzero code to start executing
-		// returns mem
-		// R20 aka loong64.REGRT1 changed as side effect
-		{
-			name:      "DUFFZERO",
-			aux:       "Int64",
-			argLength: 2,
-			reg: regInfo{
-				inputs:   []regMask{buildReg("R20")},
-				clobbers: buildReg("R20 R1"),
-			},
-			typ:            "Mem",
-			faultOnNilArg0: true,
-		},
-
 		// medium zeroing
 		// arg0 = address of memory to zero
 		// arg1 = mem
@@ -393,25 +375,6 @@ func init() {
 			faultOnNilArg0: true,
 		},
 
-		// duffcopy
-		// arg0 = address of dst memory (in R21, changed as side effect)
-		// arg1 = address of src memory (in R20, changed as side effect)
-		// arg2 = mem
-		// auxint = offset into duffcopy code to start executing
-		// returns mem
-		{
-			name:      "DUFFCOPY",
-			aux:       "Int64",
-			argLength: 3,
-			reg: regInfo{
-				inputs:   []regMask{buildReg("R21"), buildReg("R20")},
-				clobbers: buildReg("R20 R21 R1"),
-			},
-			typ:            "Mem",
-			faultOnNilArg0: true,
-			faultOnNilArg1: true,
-		},
-
 		// large zeroing
 		// arg0 = address of memory to zero
 		// arg1 = mem
diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go
index f42d64228f..4aef2d2aa1 100644
--- a/src/cmd/compile/internal/ssa/opGen.go
+++ b/src/cmd/compile/internal/ssa/opGen.go
@@ -1924,9 +1924,7 @@ const (
 	OpLOONG64CALLtail
 	OpLOONG64CALLclosure
 	OpLOONG64CALLinter
-	OpLOONG64DUFFZERO
 	OpLOONG64LoweredZero
-	OpLOONG64DUFFCOPY
 	OpLOONG64LoweredZeroLoop
 	OpLOONG64LoweredMove
 	OpLOONG64LoweredMoveLoop
@@ -25935,18 +25933,6 @@ var opcodeTable = [...]opInfo{
 		},
 	},
 	{
-		name:           "DUFFZERO",
-		auxType:        auxInt64,
-		argLen:         2,
-		faultOnNilArg0: true,
-		reg: regInfo{
-			inputs: []inputInfo{
-				{0, 524288}, // R20
-			},
-			clobbers: 524290, // R1 R20
-		},
-	},
-	{
 		name:           "LoweredZero",
 		auxType:        auxInt64,
 		argLen:         2,
@@ -25958,20 +25944,6 @@ var opcodeTable = [...]opInfo{
 		},
 	},
 	{
-		name:           "DUFFCOPY",
-		auxType:        auxInt64,
-		argLen:         3,
-		faultOnNilArg0: true,
-		faultOnNilArg1: true,
-		reg: regInfo{
-			inputs: []inputInfo{
-				{0, 1048576}, // R21
-				{1, 524288},  // R20
-			},
-			clobbers: 1572866, // R1 R20 R21
-		},
-	},
-	{
 		name:           "LoweredZeroLoop",
 		auxType:        auxInt64,
 		argLen:         2,