- x = (((a[i/8+ 0])>>4)&0x8)
- | (((a[i/8+ 32])>>5)&0x4)
- | (((a[i/8+ 64])>>6)&0x2)
- | (((a[i/8+ 96])>>7)&0x1);
- a[i/8] <<= 1; a[i/8+32]<<=1; a[i/8+64]<<=1; a[i/8+96]<<=1;
- y = (((a[i/8+ 16])>>4)&0x8)
- | (((a[i/8+ 48])>>5)&0x4)
- | (((a[i/8+ 80])>>6)&0x2)
- | (((a[i/8+112])>>7)&0x1);
- a[i/8+16] <<= 1; a[i/8+48]<<=1; a[i/8+80]<<=1; a[i/8+112]<<=1;
- b[i]= (x<<4)|y;