Add randomness to register allocation

generator/insn_fdvs2.go

@@ -13,8 +13,7 @@ func (i *Insn) genCodeFdVs2(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
-		vs2 := int(c.LMUL1) * 2
+		vd, vs2, _ := getVRegs(c.LMUL1, true, i.Name)
 
 		for r := 0; r < i.Option.Repeat; r += 1 {
 			builder.WriteString(i.gWriteRandomData(LMUL(1)))
@@ -31,7 +30,7 @@ func (i *Insn) genCodeFdVs2(pos int) []string {
 
 			builder.WriteString(i.gResultDataAddr())
 			builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-			builder.WriteString(i.gMagicInsn(vd))
+			builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 		}
 
 		res = append(res, builder.String())

generator/insn_g.go

@@ -151,7 +151,7 @@ func (i *Insn) gMoveScalarToVector(scalar string, vector int, sew SEW) string {
 	return builder.String()
 }
 
-func (i *Insn) gMagicInsn(group int) string {
+func (i *Insn) gMagicInsn(group int, lmul1 LMUL) string {
 
 	// opcode
 	insn := 0b0001011
@@ -163,6 +163,8 @@ func (i *Insn) gMagicInsn(group int) string {
 	if i.Vxsat {
 		insn += 1 << 20
 	}
+	// rs2[4:1] for EMUL
+	insn += int(lmul1) << 21
 
 	return fmt.Sprintf(".word 0x%x\n", insn)
 }

generator/insn_rdvs2.go

@@ -13,8 +13,8 @@ func (i *Insn) genCodeRdVs2(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
-		vs2 := int(c.LMUL1) * 2
+		vd, vs2, _ := getVRegs(c.LMUL1, true, i.Name)
+
 		builder.WriteString(i.gWriteRandomData(LMUL(1)))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL1, SEW(8)))
 
@@ -30,7 +30,7 @@ func (i *Insn) genCodeRdVs2(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 
 		res = append(res, builder.String())
 	}

generator/insn_rdvs2vm.go

@@ -13,8 +13,8 @@ func (i *Insn) genCodeRdVs2Vm(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
-		vs2 := int(c.LMUL1) * 2
+		vd, vs2, _ := getVRegs(c.LMUL1, false, i.Name)
+
 		builder.WriteString(i.gWriteRandomData(LMUL(3)))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(0, c.LMUL1, SEW(8)))
 
@@ -36,7 +36,7 @@ func (i *Insn) genCodeRdVs2Vm(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, SEW(i.Option.XLEN)))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 
 		res = append(res, builder.String())
 	}

generator/insn_util.go

@@ -2,7 +2,9 @@ package generator
 
 import (
 	"fmt"
+	"hash/fnv"
 	"log"
+	"math/rand"
 	"regexp"
 	"strconv"
 )
@@ -152,3 +154,29 @@ func ma(mask bool) string {
 	}
 	return "mu"
 }
+
+
+func hash(s string) uint32 {
+	h := fnv.New32a()
+	h.Write([]byte(s))
+	return h.Sum32()
+}
+
+func getVRegs(lmul1 LMUL, v0 bool, seed string) (int, int, int) {
+	if lmul1 < LMUL(1) {
+		log.Fatalln("unreachable")
+	}
+
+	availableOptions := make([]int, 0)
+	for i := iff(v0, 0, int(lmul1)); i < 32; i += int(lmul1) {
+		availableOptions = append(availableOptions, i)
+	}
+
+	rand.Seed(int64(len(availableOptions)) + int64(hash(seed)))
+
+	rand.Shuffle(len(availableOptions), func(i, j int) {
+		availableOptions[i], availableOptions[j] = availableOptions[j], availableOptions[i]
+	})
+
+	return availableOptions[0], availableOptions[1], availableOptions[2]
+}

generator/insn_vdfs1.go

@@ -14,7 +14,8 @@ func (i *Insn) genCodeVdFs1(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
+		vd, _, _ := getVRegs(c.LMUL1, true, i.Name)
+
 		builder.WriteString(i.gWriteRandomData(c.LMUL1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL1, SEW(8)))
 
@@ -35,7 +36,7 @@ func (i *Insn) genCodeVdFs1(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 
 		res = append(res, builder.String())
 	}

generator/insn_vdfs1vs2vm.go

@@ -33,8 +33,7 @@ func (i *Insn) genCodeVdFs1Vs2Vm(pos int) []string {
 			continue
 		}
 
-		vd := int(vdEMUL1)
-		vs2 := vd * 2
+		vd, vs2, _ := getVRegs(vdEMUL1, false, i.Name)
 
 		for r := 0; r < i.Option.Repeat; r += 1 {
 			builder.WriteString(i.gWriteTestData(true, !i.NoTestfloat3, r != 0, vdEMUL1, vdEEW, 0, 2))
@@ -61,7 +60,7 @@ func (i *Insn) genCodeVdFs1Vs2Vm(pos int) []string {
 
 				builder.WriteString(i.gResultDataAddr())
 				builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, vdEMUL1, vdEEW))
-				builder.WriteString(i.gMagicInsn(vd))
+				builder.WriteString(i.gMagicInsn(vd, vdEMUL1))
 			}
 		}
 

generator/insn_vdimm.go

@@ -13,7 +13,7 @@ func (i *Insn) genCodeVdImm(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
+		vd, _, _ := getVRegs(c.LMUL1, true, i.Name)
 		builder.WriteString(i.gWriteRandomData(c.LMUL1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL1, c.SEW))
 
@@ -39,7 +39,7 @@ func (i *Insn) genCodeVdImm(pos int) []string {
 
 			builder.WriteString(i.gResultDataAddr())
 			builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-			builder.WriteString(i.gMagicInsn(vd))
+			builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 		}
 
 		res = append(res, builder.String())

generator/insn_vdrs1.go

@@ -14,7 +14,8 @@ func (i *Insn) genCodeVdRs1(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
+		vd, _, _ := getVRegs(c.LMUL1, true, i.Name)
+
 		builder.WriteString(i.gWriteRandomData(c.LMUL1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL1, SEW(8)))
 
@@ -34,7 +35,7 @@ func (i *Insn) genCodeVdRs1(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 
 		res = append(res, builder.String())
 	}

generator/insn_vdrs1m.go

@@ -27,7 +27,8 @@ func (i *Insn) genCodeVdRs1m(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
+		vd, _, _ := getVRegs(c.LMUL1, true, i.Name)
+
 		builder.WriteString(i.gWriteRandomData(c.LMUL1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL1, c.SEW))
 		builder.WriteString(i.gWriteIntegerTestData(c.LMUL1, c.SEW, 0))
@@ -39,7 +40,7 @@ func (i *Insn) genCodeVdRs1m(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 
 		res = append(res, builder.String())
 	}

generator/insn_vdrs1mrs2vm.go

@@ -23,8 +23,8 @@ func (i *Insn) genCodeVdRs1mRs2Vm(pos int) []string {
 		builder.WriteString(i.gWriteRandomData(LMUL(1)))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
 
-		lmul1 := LMUL(math.Max(float64(c.LMUL)*float64(nfields), 1))
-		vd := int(lmul1)
+		lmul1 := LMUL(math.Max(float64(c.LMUL1)*float64(nfields), 1))
+		vd, _, _ := getVRegs(lmul1, false, i.Name)
 		builder.WriteString(i.gWriteRandomData(lmul1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, lmul1, c.SEW))
 		builder.WriteString(i.gWriteIntegerTestData(lmul1, c.SEW, 0))
@@ -36,7 +36,7 @@ func (i *Insn) genCodeVdRs1mRs2Vm(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, lmul1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, lmul1))
 
 		for _, stride := range []int{minStride, 0, 1, maxStride} {
 			stride = stride * int(c.SEW) / 8
@@ -55,7 +55,7 @@ func (i *Insn) genCodeVdRs1mRs2Vm(pos int) []string {
 
 			builder.WriteString(i.gResultDataAddr())
 			builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, lmul1, c.SEW))
-			builder.WriteString(i.gMagicInsn(vd))
+			builder.WriteString(i.gMagicInsn(vd, lmul1))
 		}
 		res = append(res, builder.String())
 	}

generator/insn_vdrs1mvm.go

@@ -23,8 +23,8 @@ func (i *Insn) genCodeVdRs1mVm(pos int) []string {
 		builder.WriteString(i.gWriteRandomData(LMUL(1)))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
 
-		lmul1 := LMUL(math.Max(float64(c.LMUL)*float64(nfields), 1))
-		vd := int(lmul1)
+		lmul1 := LMUL(math.Max(float64(c.LMUL1)*float64(nfields), 1))
+		vd, _, _ := getVRegs(lmul1, false, i.Name)
 		builder.WriteString(i.gWriteRandomData(lmul1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, lmul1, c.SEW))
 		builder.WriteString(i.gWriteIntegerTestData(lmul1, c.SEW, 0))
@@ -36,7 +36,7 @@ func (i *Insn) genCodeVdRs1mVm(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, lmul1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, lmul1))
 
 		res = append(res, builder.String())
 	}

generator/insn_vdrs1mvs2vm.go

@@ -50,7 +50,7 @@ func (i *Insn) genCodeVdRs1mVs2Vm(pos int) []string {
 
 			builder.WriteString(i.gResultDataAddr())
 			builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, lmul1, sew))
-			builder.WriteString(i.gMagicInsn(vd))
+			builder.WriteString(i.gMagicInsn(vd, lmul1))
 		}
 		res = append(res, builder.String())
 	}

generator/insn_vdrs1vs2vm.go

@@ -33,8 +33,7 @@ func (i *Insn) genCodeVdRs1Vs2Vm(pos int) []string {
 			continue
 		}
 
-		vd := int(vdEMUL1)
-		vs2 := vd * 2
+		vd, vs2, _ := getVRegs(vdEMUL1, false, i.Name)
 		builder.WriteString(i.gWriteIntegerTestData(vdEMUL1, vdEEW, 0))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, vdEMUL1, vdEEW))
 
@@ -61,7 +60,7 @@ func (i *Insn) genCodeVdRs1Vs2Vm(pos int) []string {
 
 			builder.WriteString(i.gResultDataAddr())
 			builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, vdEMUL1, vdEEW))
-			builder.WriteString(i.gMagicInsn(vd))
+			builder.WriteString(i.gMagicInsn(vd, vdEMUL1))
 		}
 
 		res = append(res, builder.String())

generator/insn_vdvm.go

@@ -16,7 +16,7 @@ func (i *Insn) genCodeVdVm(pos int) []string {
 		builder.WriteString(i.gWriteRandomData(LMUL(1)))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
 
-		vd := int(c.LMUL1)
+		vd, _, _ := getVRegs(c.LMUL1, false, i.Name)
 		builder.WriteString(i.gWriteRandomData(c.LMUL1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL1, SEW(8)))
 
@@ -29,7 +29,7 @@ func (i *Insn) genCodeVdVm(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 
 		res = append(res, builder.String())
 	}

generator/insn_vdvs1.go

@@ -13,8 +13,7 @@ func (i *Insn) genCodeVdVs1(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL1)
-		vs1 := 2 * int(c.LMUL1)
+		vd, vs1, _ := getVRegs(c.LMUL1, true, i.Name)
 		builder.WriteString(i.gWriteRandomData(c.LMUL1))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL1, c.SEW))
 
@@ -29,7 +28,7 @@ func (i *Insn) genCodeVdVs1(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 
 		res = append(res, builder.String())
 	}

generator/insn_vdvs1vs2vm.go

@@ -63,7 +63,7 @@ func (i *Insn) genCodeVdVs1Vs2Vm(pos int) []string {
 
 			builder.WriteString(i.gResultDataAddr())
 			builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, vdEMUL1, vdEEW))
-			builder.WriteString(i.gMagicInsn(vd))
+			builder.WriteString(i.gMagicInsn(vd, vdEMUL1))
 		}
 
 		res = append(res, builder.String())

generator/insn_vdvs2.go

@@ -22,8 +22,7 @@ func (i *Insn) genCodeVdVs2(pos int) []string {
 		builder := strings.Builder{}
 		builder.WriteString(c.initialize())
 
-		vd := int(c.LMUL)
-		vs2 := 2 * int(c.LMUL)
+		vd, vs2, _ := getVRegs(c.LMUL, true, i.Name)
 		builder.WriteString(i.gWriteRandomData(c.LMUL * 2))
 
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, c.LMUL, c.SEW))
@@ -39,7 +38,7 @@ func (i *Insn) genCodeVdVs2(pos int) []string {
 
 		builder.WriteString(i.gResultDataAddr())
 		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
+		builder.WriteString(i.gMagicInsn(vd, c.LMUL))
 
 		res = append(res, builder.String())
 

generator/insn_vdvs2fs1v0.go

@@ -16,8 +16,7 @@ func (i *Insn) genCodeVdVs2Fs1V0(pos int) []string {
 		builder.WriteString(i.gWriteRandomData(LMUL(1)))
 		builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
 
-		vd := int(c.LMUL1)
-		vs2 := 2 * int(c.LMUL1)
+		vd, vs2, _ := getVRegs(c.LMUL1, false, i.Name)
 
 		for r := 0; r < i.Option.Repeat; r += 1 {
 			builder.WriteString(i.gWriteRandomData(c.LMUL1))
@@ -43,7 +42,7 @@ func (i *Insn) genCodeVdVs2Fs1V0(pos int) []string {
 
 				builder.WriteString(i.gResultDataAddr())
 				builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, c.LMUL1, c.SEW))
-				builder.WriteString(i.gMagicInsn(vd))
+				builder.WriteString(i.gMagicInsn(vd, c.LMUL1))
 			}
 		}
 

generator/insn_vdvs2fs1vm.go

@@ -37,8 +37,7 @@ func (i *Insn) genCodeVdVs2Fs1Vm(pos int) []string {
 			continue
 		}
 
-		vd := int(vdEMUL1)
-		vs2 := vd * 2
+		vd, vs2, _ := getVRegs(vdEMUL1, false, i.Name)
 
 		for r := 0; r < i.Option.Repeat; r += 1 {
 			builder.WriteString(i.gWriteRandomData(vdEMUL1))
@@ -65,7 +64,7 @@ func (i *Insn) genCodeVdVs2Fs1Vm(pos int) []string {
 
 				builder.WriteString(i.gResultDataAddr())
 				builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, vdEMUL1, vdEEW))
-				builder.WriteString(i.gMagicInsn(vd))
+				builder.WriteString(i.gMagicInsn(vd, vdEMUL1))
 			}
 		}