//     types are naturally aligned with a maximum alignment MaxAlign.
//
// *StdSizes implements Sizes.
type StdSizes struct {
	WordSize int64 // word size in bytes - must be >= 4 (32bits)
	MaxAlign int64 // maximum alignment in bytes - must be >= 1
}

func (s *StdSizes) Alignof(T Type) (result int64) {
	defer func() {
		assert(result >= 1)
	}()

	// base and extent.
	b := b0
	n := n0

	for i := uintptr(0); i < n; {
		// Find bits for the next word.
		bits := uint32(*addb(ptrmask, i/(goarch.PtrSize*8)))
		if bits == 0 {
			i += goarch.PtrSize * 8
			continue
		}
		for j := 0; j < 8 && i < n; j++ {
			if bits&1 != 0 {
				// Same work as in scanobject; see comments there.
				p := *(*uintptr)(unsafe.Pointer(b + i))

}

// addDwarfAddrField adds a DWARF field in DWARF 64bits or 32bits.
func (d *dwctxt) addDwarfAddrField(sb *loader.SymbolBuilder, v uint64) {
	if isDwarf64(d.linkctxt) {
		sb.AddUint(d.arch, v)
	} else {
		sb.AddUint32(d.arch, uint32(v))
	}
}

// addDwarfAddrRef adds a DWARF pointer in DWARF 64bits or 32bits.
func (d *dwctxt) addDwarfAddrRef(sb *loader.SymbolBuilder, t loader.Sym) {

//     types are naturally aligned with a maximum alignment MaxAlign.
//
// *StdSizes implements Sizes.
type StdSizes struct {
	WordSize int64 // word size in bytes - must be >= 4 (32bits)
	MaxAlign int64 // maximum alignment in bytes - must be >= 1
}

func (s *StdSizes) Alignof(T Type) (result int64) {
	defer func() {
		assert(result >= 1)
	}()

		setCarrierSym(t, s.Sym())
		return s.Sym()
	}
	var (
		symgostring = groupSym("go:string.*", sym.SGOSTRING)
		symgofunc   = groupSym("go:func.*", sym.SGOFUNC)
		symgcbits   = groupSym("runtime.gcbits.*", sym.SGCBITS)
	)

	symgofuncrel := symgofunc
	if ctxt.UseRelro() {
		symgofuncrel = groupSym("go:funcrel.*", sym.SGOFUNCRELRO)
	}

	symt := ldr.CreateSymForUpdate("runtime.symtab", 0)

import (
	"bytes"
	"fmt"
	"io"
	"math/bits"
	"strings"
	"testing"
)

func TestMaxBase(t *testing.T) {
	if MaxBase != len(digits) {
		t.Fatalf("%d != %d", MaxBase, len(digits))
	}
}

// log2 computes the integer binary logarithm of x.
// The result is the integer n for which 2^n <= x < 2^(n+1).
// If x == 0, the result is -1.
func log2(x Word) int {
	return bits.Len(uint(x)) - 1
}

	// n must always be a multiple of 8, since gcBits is
	// always rounded up 8 bytes.
	for _, n := range []int{8, 16, 32, 64, 128} {
		b.Run(fmt.Sprintf("bits=%d", n*8), func(b *testing.B) {
			// Initialize a new byte slice with pseduo-random data.
			bits := make([]byte, n)
			rand.Read(bits)

			b.ResetTimer()
			for i := 0; i < b.N; i++ {
				runtime.MSpanCountAlloc(s, bits)
			}
		})
	}
}

		if sect.segname == "__TEXT" {
			if sect.name == "__text" {
				bld.SetType(sym.STEXT)
			} else {
				bld.SetType(sym.SRODATA)
			}
		} else {
			if sect.name == "__bss" {
				bld.SetType(sym.SNOPTRBSS)
				bld.SetData(nil)
			} else {
				bld.SetType(sym.SNOPTRDATA)
			}
		}

		sect.sym = s
	}

	// enter sub-symbols into symbol table.

	VADDPD 8128(DX), Z28, Z29       // 62619d40586a7f
	VADDPD 8128(DX)(AX*2), Z0, Z29  // 6261fd48586c427f
	VADDPD 8128(DX)(AX*2), Z29, Z1  // 62f19540584c427f
	// EVEX: compressed displacement that does not fit into 8bits.
	VADDPD 2048(DX), X29, X0        // 62f19500588200080000
	VADDPD 2048(DX), X1, X29        // 6261f50858aa00080000
	VADDPD 2048(DX), X29, X28       // 6261950058a200080000

		// insert low width bits of arg0 into the result starting at bit lsb, bits to the left of the inserted bit field are set to the high/sign bit of the inserted bit field, bits to the right are zeroed
		{name: "SBFIZ", argLength: 1, reg: gp11, asm: "SBFIZ", aux: "ARM64BitField"},
		// extract width bits of arg0 starting at bit lsb and insert at low end of result, remaining high bits are set to the high/sign bit of the extracted bitfield