nn := len(p)
	if h.offset > 0 {
		n := copy(h.buffer[h.offset:], p)
		if h.offset+n < TagSize {
			h.offset += n
			return nn, nil
		}
		p = p[n:]
		h.offset = 0
		update(&h.macState, h.buffer[:])
	}
	if n := len(p) - (len(p) % TagSize); n > 0 {
		update(&h.macState, p[:n])
		p = p[n:]
	}
	if len(p) > 0 {
		h.offset += copy(h.buffer[h.offset:], p)
	}
	return nn, nil
}

	return amt, nil
}

func (r *Reader) Seek(offset int64, whence int) (ret int64, err error) {
	switch whence {
	case io.SeekStart:
		if offset < 0 || offset > int64(len(r.b)) {
			return 0, fmt.Errorf("invalid seek: new offset %d (out of range [0 %d]", offset, len(r.b))
		}
		r.off = offset
		return offset, nil
	case io.SeekCurrent:
		newoff := r.off + offset
		if newoff < 0 || newoff > int64(len(r.b)) {

	f.offset += int64(n)
	return n, nil
}

func (f *openMapFile) Seek(offset int64, whence int) (int64, error) {
	switch whence {
	case 0:
		// offset += 0
	case 1:
		offset += f.offset
	case 2:
		offset += int64(len(f.f.Data))
	}
	if offset < 0 || offset > int64(len(f.f.Data)) {
		return 0, &fs.PathError{Op: "seek", Path: f.path, Err: fs.ErrInvalid}
	}
	f.offset = offset

	// Block 0x28, offset 0xa00
	0xa00: 0x000c, 0xa01: 0x000c,
	0xa3b: 0x000c,
	0xa3c: 0x000c,
	// Block 0x29, offset 0xa40
	0xa41: 0x000c, 0xa42: 0x000c, 0xa43: 0x000c, 0xa44: 0x000c,
	0xa4d: 0x000c,
	0xa62: 0x000c, 0xa63: 0x000c,
	// Block 0x2a, offset 0xa80
	0xa81: 0x000c,
	// Block 0x2b, offset 0xac0
	0xaca: 0x000c,
	0xad2: 0x000c, 0xad3: 0x000c, 0xad4: 0x000c, 0xad6: 0x000c,
	// Block 0x2c, offset 0xb00

	// Block 0x10, offset 0x400
	0x432: 0xbb,
	// Block 0x11, offset 0x440
	0x445: 0xbc, 0x446: 0xbd, 0x447: 0xbe,
	0x449: 0xbf,
	// Block 0x12, offset 0x480
	0x480: 0xc0, 0x484: 0xba,
	0x48b: 0xc1,
	0x4a3: 0xc2, 0x4a5: 0xc3,
	// Block 0x13, offset 0x4c0
	0x4c8: 0xc4,
	// Block 0x14, offset 0x500
	0x520: 0x25, 0x521: 0x26, 0x522: 0x27, 0x523: 0x28, 0x524: 0x29, 0x525: 0x2a, 0x526: 0x2b, 0x527: 0x2c,
	0x528: 0x2d,

	// Block 0x28, offset 0xa00
	0xa00: 0x000c, 0xa01: 0x000c,
	0xa3b: 0x000c,
	0xa3c: 0x000c,
	// Block 0x29, offset 0xa40
	0xa41: 0x000c, 0xa42: 0x000c, 0xa43: 0x000c, 0xa44: 0x000c,
	0xa4d: 0x000c,
	0xa62: 0x000c, 0xa63: 0x000c,
	// Block 0x2a, offset 0xa80
	0xa81: 0x000c,
	// Block 0x2b, offset 0xac0
	0xaca: 0x000c,
	0xad2: 0x000c, 0xad3: 0x000c, 0xad4: 0x000c, 0xad6: 0x000c,
	// Block 0x2c, offset 0xb00

		}
		a.steps = append(a.steps, abiStep{
			kind:   kind,
			offset: offset + uintptr(i)*size,
			size:   size,
			ireg:   a.iregs,
		})
		a.iregs++
	}
	return true
}

// assignFloatN assigns n values to registers, each "size" bytes large,
// from the data at [offset, offset+n*size) in memory. Each value at
// [offset+i*size, offset+(i+1)*size) for i < n is assigned to the
// next n floating-point registers.

	// Block 0x38, offset 0xe00
	0xe00: 0x000a,
	// Block 0x39, offset 0xe40
	0xe40: 0x0009,
	0xe5b: 0x007a, 0xe5c: 0x006a,
	// Block 0x3a, offset 0xe80
	0xe92: 0x000c, 0xe93: 0x000c, 0xe94: 0x000c,
	0xeb2: 0x000c, 0xeb3: 0x000c, 0xeb4: 0x000c,
	// Block 0x3b, offset 0xec0
	0xed2: 0x000c, 0xed3: 0x000c,
	0xef2: 0x000c, 0xef3: 0x000c,
	// Block 0x3c, offset 0xf00
	0xf34: 0x000c, 0xf35: 0x000c,

			// Make a copy manually :(
			for i := 0; i < ts.NumFields(); i++ {
				fields = append(fields, ts.Field(i))
			}

			offsets := conf.Sizes.Offsetsof(fields)
			if offsets[0] != want[0] || offsets[1] != want[1] || offsets[2] != want[2] {
				t.Errorf("OffsetsOf(%v) = %v want %v", ts, offsets, want)
			}
		})
	}
}

type gcSizeTest struct {
	name string
	src  string
}

}

// nfcIndex: 22 blocks, 1408 entries, 1408 bytes
// Block 0 is the zero block.
var nfcIndex = [1408]uint8{
	// Block 0x0, offset 0x0
	// Block 0x1, offset 0x40
	// Block 0x2, offset 0x80
	// Block 0x3, offset 0xc0
	0xc2: 0x2c, 0xc3: 0x01, 0xc4: 0x02, 0xc5: 0x03, 0xc6: 0x2d, 0xc7: 0x04,
	0xc8: 0x05, 0xca: 0x2e, 0xcb: 0x2f, 0xcc: 0x06, 0xcd: 0x07, 0xce: 0x08, 0xcf: 0x30,