{Optab: Optab{as: AMOVD, a1: C_LACON, a6: C_REG, type_: 26, size: 8}, minGOPPC64: 10, pfxsize: 8},
	{Optab: Optab{as: AMOVD, a1: C_LOREG, a6: C_REG, type_: 36, size: 8}, minGOPPC64: 10, pfxsize: 8},
	{Optab: Optab{as: AMOVD, a1: C_REG, a6: C_LOREG, type_: 35, size: 8}, minGOPPC64: 10, pfxsize: 8},
	{Optab: Optab{as: AMOVD, a1: C_REG, a6: C_ADDR, type_: 74, size: 8}, minGOPPC64: 10, pfxsize: 8},

			if cmp(n, i) {
				xcmp[i][n] = true
			}
		}
	}
	for n = 0; optab[n].as != obj.AXXX; n++ {
	}
	sort.Sort(ocmp(optab[:n]))
	for i := 0; i < n; i++ {
		r := optab[i].as
		r0 := r & obj.AMask
		start := i
		for optab[i].as == r {
			i++
		}
		oprange[r0] = optab[start:i]
		i--

		switch r {
		default:
			ctxt.Diag("unknown op in build: %v", r)

			if cmp(n, i) {
				xcmp[i][n] = true
			}
		}
	}
	for n = 0; optab[n].as != obj.AXXX; n++ {
	}
	sort.Sort(ocmp(optab[:n]))
	for i := 0; i < n; i++ {
		r := optab[i].as
		r0 := r & obj.AMask
		start := i
		for optab[i].as == r {
			i++
		}
		oprange[r0] = optab[start:i]
		i--

		switch r {
		default:
			ctxt.Diag("unknown op in build: %v", r)

			}
		}
	}
}

// The optab size should remain constant when reinitializing the PPC64 assembler backend.
func TestOptabReinit(t *testing.T) {
	buildcfg.GOOS = "linux"
	buildcfg.GOARCH = "ppc64le"
	buildcfg.GOPPC64 = 8
	buildop(nil)
	optabLen := len(optab)
	buildcfg.GOPPC64 = 9
	buildop(nil)
	reinitOptabLen := len(optab)
	if reinitOptabLen != optabLen {

		for j := 0; j < C_GOK; j++ {
			if cmp(j, i) {
				xcmp[i][j] = true
			}
		}
	}

	sort.Sort(ocmp(optab))
	for i := 0; i < len(optab); i++ {
		as, start := optab[i].as, i
		for ; i < len(optab)-1; i++ {
			if optab[i+1].as != as {
				break
			}
		}
		t := optab[start : i+1]
		oprangeset(as, t)
		switch as {
		default:
			ctxt.Diag("unknown op in build: %v", as)

				xcmp[i][n] = true
			}
		}
	}
	sort.Sort(ocmp(optab))
	for i := 0; i < len(optab); i++ {
		r := optab[i].as
		start := i
		for ; i+1 < len(optab); i++ {
			if optab[i+1].as != r {
				break
			}
		}
		oprange[r&obj.AMask] = optab[start : i+1]

		// opset() aliases optab ranges for similar instructions, to reduce the number of optabs in the array.

			ctxt.Diag("phase error in avxOptab: %d (%v)", i, c)
		}
		opindex[c&obj.AMask] = &avxOptab[i]
	}
	for i := 1; optab[i].as != 0; i++ {
		c := optab[i].as
		if opindex[c&obj.AMask] != nil {
			ctxt.Diag("phase error in optab: %d (%v)", i, c)
		}
		opindex[c&obj.AMask] = &optab[i]
	}

	for i := 0; i < Ymax; i++ {
		ycover[i*Ymax+i] = 1
	}

	ycover[Yi0*Ymax+Yu2] = 1

	As       As        // assembler opcode
	Reg      int16     // 2nd source operand
	RegTo2   int16     // 2nd destination operand
	Mark     uint16    // bitmask of arch-specific items
	Optab    uint16    // arch-specific opcode index
	Scond    uint8     // bits that describe instruction suffixes (e.g. ARM conditions, RISCV Rounding Mode)
	Back     uint8     // for x86 back end: backwards branch state

			p.As = AANDISCC
			p.From.Offset >>= 16
		}

	// To maintain backwards compatibility, we accept some 4 argument usage of
	// several opcodes which was likely not intended, but did work. These are not
	// added to optab to avoid the chance this behavior might be used with newer
	// instructions.
	//
	// Rewrite argument ordering like "ADDEX R3, $3, R4, R5" into
	//                                "ADDEX R3, R4, $3, R5"

	// function symbol names are prefixed here with '.' to avoid
	// a dependency on the reflect package.
	syms = make(map[string]any, len(md.ptab))
	for _, ptab := range md.ptab {
		symName := resolveNameOff(unsafe.Pointer(md.types), ptab.name)
		t := toRType((*_type)(unsafe.Pointer(md.types))).typeOff(ptab.typ) // TODO can this stack of conversions be simpler?
		var val any
		valp := (*[2]unsafe.Pointer)(unsafe.Pointer(&val))