stdlib/lshift.s

   1  .text
   2 .globl __mpn_lshift
   3 .type __mpn_lshift,@function
   4 .align 1<<4
   5 __mpn_lshift:
   6  lea -8(%rdi,%rdx,8), %rdi
   7  lea -8(%rsi,%rdx,8), %rsi
   8  mov %edx, %eax
   9  and $3, %eax
  10  jne .Lnb00
  11 .Lb00:
  12  mov (%rsi), %r10
  13  mov -8(%rsi), %r11
  14  xor %eax, %eax
  15  shld %cl, %r10, %rax
  16  mov -16(%rsi), %r8
  17  lea 24(%rdi), %rdi
  18  sub $4, %rdx
  19  jmp .L00
  20 .Lnb00:
  21  cmp $2, %eax
  22  jae .Lnb01
  23 .Lb01: mov (%rsi), %r9
  24  xor %eax, %eax
  25  shld %cl, %r9, %rax
  26  sub $2, %rdx
  27  jb .Lle1
  28  mov -8(%rsi), %r10
  29  mov -16(%rsi), %r11
  30  lea -8(%rsi), %rsi
  31  lea 16(%rdi), %rdi
  32  jmp .L01
  33 .Lle1: shl %cl, %r9
  34  mov %r9, (%rdi)
  35  ret
  36 .Lnb01:
  37  jne .Lb11
  38 .Lb10: mov (%rsi), %r8
  39  mov -8(%rsi), %r9
  40  xor %eax, %eax
  41  shld %cl, %r8, %rax
  42  sub $3, %rdx
  43  jb .Lle2
  44  mov -16(%rsi), %r10
  45  lea -16(%rsi), %rsi
  46  lea 8(%rdi), %rdi
  47  jmp .L10
  48 .Lle2: shld %cl, %r9, %r8
  49  mov %r8, (%rdi)
  50  shl %cl, %r9
  51  mov %r9, -8(%rdi)
  52  ret
  53  .p2align 4
  54 .Lb11:
  55  mov (%rsi), %r11
  56  mov -8(%rsi), %r8
  57  xor %eax, %eax
  58  shld %cl, %r11, %rax
  59  mov -16(%rsi), %r9
  60  lea -24(%rsi), %rsi
  61  sub $4, %rdx
  62  jb .Lend
  63  .p2align 4
  64 .Ltop: shld %cl, %r8, %r11
  65  mov (%rsi), %r10
  66  mov %r11, (%rdi)
  67 .L10: shld %cl, %r9, %r8
  68  mov -8(%rsi), %r11
  69  mov %r8, -8(%rdi)
  70 .L01: shld %cl, %r10, %r9
  71  mov -16(%rsi), %r8
  72  mov %r9, -16(%rdi)
  73 .L00: shld %cl, %r11, %r10
  74  mov -24(%rsi), %r9
  75  mov %r10, -24(%rdi)
  76  add $-32, %rsi
  77  lea -32(%rdi), %rdi
  78  sub $4, %rdx
  79  jnc .Ltop
  80 .Lend: shld %cl, %r8, %r11
  81  mov %r11, (%rdi)
  82  shld %cl, %r9, %r8
  83  mov %r8, -8(%rdi)
  84  shl %cl, %r9
  85  mov %r9, -16(%rdi)
  86  ret
  87 .size __mpn_lshift,.-__mpn_lshift