FM Towns: Free Software Collection 6/FM Towns Free Software Collection 6.iso/t_os/et/src/_as.s

Text File | 1993-07-08 | 17KB | 848 lines

.text
  .align  4
.globl  ___line
___line:
  pushl %ebp
  pushl %edi
  pushl %esi
  pushl %ebx
  movl  %esp,%ebp
  movl  20(%ebp),%ebx
  movl  (%ebx),%ecx     /* pq_0 = pq_a[0] */
  movl  8(%ebx),%eax    /* pq_2 = pq_a[2] */
  cmpl  %ecx,%eax
  jge   0f              /* if (pq_2 >= pq_0) goto 0f */
  movl  %ecx,8(%ebx)    /* pq_a[2] = pq_0 */
  movl  %eax,(%ebx)     /* pq_a[0] = pq_2 */
  movl  4(%ebx),%ecx    /* pq_1 = pq_a[1] */
  movl  12(%ebx),%eax   /* pq_3 = pq_a[3] */
  movl  %ecx,12(%ebx)   /* pq_a[3] = pq_1 */
  movl  %eax,4(%ebx)    /* pq_a[1] = pq_3 */
0:
  movl  (%ebx),%ecx     /* pq_0 = pq_a[0] */
  andl  $1,%ecx         /* pq_0 &= 1 */
  sall  $2,%ecx         /* pq_0 <<= 2 */
  movl  24(%ebp),%esi
  sall  %cl,%esi        /* %esi = col << pq_0 */
  movl  (%ebx),%ecx     /* x = pq_a[0] */
  sarl  $1,%ecx         /* x /= 2 */
  movl  4(%ebx),%eax    /* y = pq_a[1] */
  movl  $0x140,%edx
  imull %edx            /* y *= 80*sizeof(VRAM) */
  addl  %ecx,%eax       /* x + y */
  movl  _G_nb+8,%ecx
  testl %ecx,%ecx
  je    0f              /* if (!G_nb.page) goto 0f */
  movl  $0x20000,%ecx
0:
  addl  %ecx,%eax       /* x+y+(!G_nb.page)?0:OFFSET */
  movl  %eax,%edi
  movl  $80,%ecx
  sall  $2,%ecx         /* y_inc *= sizeof(VRAM) */
  movl  12(%ebx),%eax   /* pq_3 = pq_a[3] */
  subl  4(%ebx),%eax    /* dq = pq_3 - pq_a[1] */
  cmpl  $0,%eax
  jge   0f              /* if (dq >= 0) goto 0f */
  negl  %eax            /* dq -= dq */
  negl  %ecx            /* y_inc -= y_inc */
0:
  movl  28(%ebp),%edx
  movl  %ecx,28(%ebp)   /* 28(%ebp) = y_inc */
  movl  %eax,%ecx       /* %ecx = dq */
  movl  8(%ebx),%eax    /* pq_2 = pq_a[2] */
  subl  (%ebx),%eax     /* dp = pq_2 - pq_a[0] */
  movl  %eax,20(%ebp)
  movw  %ds,%ax
  movw  %ax,%fs
  movw  $0x120,%ax      /* %ds = 0x120 */
  movw  %ax,%ds
  movl  %edx,%eax       /* %eax = mm */
  movl  20(%ebp),%edx   /* %edx = dp */
  movl  %edi,%ebx       /* %ebx = vram_p */
  movl  %ds:(%ebx),%edi /* %edi = *vram_p */
  cmpl  $0,%eax         /* if (mm==P_SET) */
  je    P_SET           /*   goto P_SET */
  cmpl  $1,%eax         /* if (mm==P_RES) */
  je    P_RES           /*   goto P_RES */
  cmpl  $2,%eax         /* if (mm==P_NEG) */
  je    P_NEG           /*   goto P_NEG */
  jmp   6f
  .align  2
P_SET:
  orl   %esi,%edi       /* set_bit(v, u) */
  movl  %ecx,%eax
  orl   %edx,%eax
  je    6f              /* if (!(dp|dq)) goto 6f */
  cmpl  $0,%ecx
  jne   3f              /* if (dq) goto 3f */
x_line:
  movl  %edx,%ecx
  movl  24(%esp),%eax   /* %eax = col */
  movl  $4,%edx         /* %edx = sizeof(VRAM) */
  cmpl  $0,%ecx
  jne   0f              /* if (dp) goto 0f */
  jmp   6f
  .align  4
0:
  shll  $4,%esi         /* u <<= 4 */
  je    1f              /* if (!u) goto 1f */
2:
  orl   %esi,%edi       /* set_bit(v, u) */
  loop  0b              /* if (--dp) goto 0b */
  jmp   6f
  .align  4
1:
  movl  %edi,%ds:(%ebx)
  addl  %edx,%ebx       /* vram_x_inc() */
  movl  %ds:(%ebx),%edi
  movl  %eax,%esi       /* u = col */
  jmp   2b
  .align  4
3:
  cmpl  $0,%edx         /* if (dp) goto 1f */
  jne   1f
y_line:
  movl  28(%esp),%edx   /* %edx = y_inc */
  cmpl  $0,%ecx
  jne   2f              /* if (dq) goto 2f */
  jmp   6f
  .align  4
2:
  movl  %edi,%ds:(%ebx)
  addl  %edx,%ebx       /* vram_y_inc() */
  movl  %ds:(%ebx),%edi
  orl   %esi,%edi       /* set_bit(v, u) */
  loop  2b              /* if (dq) goto 2b */
  jmp   6f

  .align  4
1:
  cmpl  %edx,%ecx
  jg    5f              /* if (dq > dp) goto yx_line */
xy_line:
  movl  %ecx,%ebp       /* %ebp = dq */
  movl  %edx,%ecx       /* %ecx = dp */
  movl  %edx,%eax       /* %eax = dp */
  sarl  $1,%eax         /* slope = dp >> 1 */
  cmpl  $0,%ecx         /* if (dp) goto 2f */
  jne   2f
  jmp   6f
  .align  4
2:
  addl  %ebp,%eax       /* slope += dq */
  cmpl  %edx,%eax
  jl    3f              /* if (slope < dp) goto 3f */
  subl  %edx,%eax       /* slope -= dp */
  movl  %edi,%ds:(%ebx)
  addl  28(%esp),%ebx   /* vram_y_inc() */
  movl  %ds:(%ebx),%edi
3:
  shll  $4,%esi
  je    3f
4:
  orl   %esi,%edi       /* set_bit(v, u) */
  loop  2b              /* if (--dp) goto 2b */
  jmp   6f
  .align  4
3:
  movl  %edi,%ds:(%ebx)
  addl  $4,%ebx         /* vram_x_inc() */
  movl  %ds:(%ebx),%edi
  movl  24(%esp),%esi
  jmp 4b

  .align  4
5:
  movl  %ecx,%ebp       /* %ebp = dq */
  movl  %ecx,%eax       /* %eax = dq */
  sarl  $1,%eax         /* slope = dq >> 1 */
  cmpl  $0,%ecx
  jne   1f              /* if (dq) goto 1f */
  jmp   6f
  .align  4
1:
  addl  %edx,%eax       /* slope += dp */
  cmpl  %ebp,%eax
  jl    2f              /* if (slope < dq) goto 2f */
  subl  %ebp,%eax       /* slope -= dq */
  shll  $4,%esi
  je    3f
2:
  movl  %edi,%ds:(%ebx)
  addl  28(%esp),%ebx   /* vram_y_inc() */
  movl  %ds:(%ebx),%edi
  orl   %esi,%edi       /* set_bit(v, u) */
  loop  1b              /* if (dq) goto 1b */
  jmp   6f
  .align  4
3:
  movl  %edi,%ds:(%ebx)
  addl  $4,%ebx         /* vram_x_inc() */
  movl  %ds:(%ebx),%edi
  movl  24(%esp),%esi
  jmp 2b

  .align  2
P_RES:
  notl  %esi
  andl  %esi,%edi
  notl  %esi
  movl  %ecx,%eax
  orl   %edx,%eax
  je    6f
  cmpl  $0,%ecx
  jne   3f
  movl  %edx,%ecx
  movl  24(%esp),%eax
  movl  $4,%edx
  cmpl  $0,%ecx
  jne   0f
  jmp   6f
  .align  4
0:
  shll  $4,%esi
  je    1f
2:
  notl  %esi
  andl  %esi,%edi
  notl  %esi
  loop  0b
  jmp   6f
  .align  4
1:
  movl  %edi,%ds:(%ebx)
  addl  %edx,%ebx
  movl  %ds:(%ebx),%edi
  movl  %eax,%esi
  jmp   2b
  .align  2
3:
  cmpl  $0,%edx
  jne   1f
  movl  28(%esp),%edx
  cmpl  $0,%ecx
  jne   2f
  jmp   6f
  .align  4
2:
  movl  %edi,%ds:(%ebx)
  addl  %edx,%ebx
  movl  %ds:(%ebx),%edi
  notl  %esi
  andl  %esi,%edi
  notl  %esi
  loop  2b
  jmp   6f
  .align  4
1:
  cmpl  %edx,%ecx
  jg    5f
  movl  %ecx,%ebp
  movl  %edx,%ecx
  movl  %edx,%eax
  sarl  $1,%eax
  cmpl  $0,%ecx
  jne   2f
  jmp   6f
  .align  4
2:
  addl  %ebp,%eax
  cmpl  %edx,%eax
  jl    3f
  subl  %edx,%eax
  movl  %edi,%ds:(%ebx)
  addl  28(%esp),%ebx
  movl  %ds:(%ebx),%edi
3:
  shll  $4,%esi
  je    3f
4:
  notl  %esi
  andl  %esi,%edi
  notl  %esi
  loop  2b
  jmp   6f
  .align  4
3:
  movl  %edi,%ds:(%ebx)
  addl  $4,%ebx
  movl  %ds:(%ebx),%edi
  movl  24(%esp),%esi
  jmp   4b
  .align  4
5:
  movl  %ecx,%ebp
  movl  %ecx,%eax
  sarl  $1,%eax
  cmpl  $0,%ecx
  jne   1f
  jmp   6f
  .align  4
1:
  addl  %edx,%eax
  cmpl  %ebp,%eax
  jl    2f
  subl  %ebp,%eax
  shll  $4,%esi
  je    3f
2:
  movl  %edi,%ds:(%ebx)
  addl  28(%esp),%ebx
  movl  %ds:(%ebx),%edi
  notl  %esi
  andl  %esi,%edi
  notl  %esi
  loop  1b
  jmp   6f
  .align  4
3:
  movl  %edi,%ds:(%ebx)
  addl  $4,%ebx
  movl  %ds:(%ebx),%edi
  movl  24(%esp),%esi
  jmp   2b
  .align  4
P_NEG:
  xorl  %esi,%edi
  movl  %ecx,%eax
  orl   %edx,%eax
  je    6f
  cmpl  $0,%ecx
  jne   3f
  movl  %edx,%ecx
  movl  24(%esp),%eax
  movl  $4,%edx
  cmpl  $0,%ecx
  jne   0f
  jmp   6f
  .align  4
0:
  shll  $4,%esi
  je    1f
2:
  xorl  %esi,%edi
  loop  0b
  jmp   6f
  .align  4
1:
  movl  %edi,%ds:(%ebx)
  addl  %edx,%ebx
  movl  %ds:(%ebx),%edi
  movl  %eax,%esi
  jmp   2b

  .align  4
3:
  cmpl  $0,%edx
  jne   1f
  movl  28(%esp),%edx
  cmpl  $0,%ecx
  jne   2f
  jmp   6f
  .align  4
2:
  movl  %edi,%ds:(%ebx)
  addl  %edx,%ebx
  movl  %ds:(%ebx),%edi
  xorl  %esi,%edi
  loop  2b
  jmp   6f
  .align  4
1:
  cmpl  %edx,%ecx
  jg    5f
  movl  %ecx,%ebp
  movl  %edx,%ecx
  movl  %edx,%eax
  sarl  $1,%eax
  cmpl  $0,%ecx
  jne   2f
  jmp   6f
  .align  4
2:
  addl  %ebp,%eax
  cmpl  %edx,%eax
  jl    3f
  subl  %edx,%eax
  movl  %edi,%ds:(%ebx)
  addl  28(%esp),%ebx
  movl  %ds:(%ebx),%edi
3:
  shll  $4,%esi
  je    3f
4:
  xorl  %esi,%edi
  loop  2b
  jmp   6f
  .align  4
3:
  movl  %edi,%ds:(%ebx)
  addl  $4,%ebx
  movl  %ds:(%ebx),%edi
  movl  24(%esp),%esi
  jmp   4b
  .align  4
5:
  movl  %ecx,%ebp
  movl  %ecx,%eax
  sarl  $1,%eax
  cmpl  $0,%ecx
  jne   1f
  jmp   6f
  .align  4
1:
  addl  %edx,%eax
  cmpl  %ebp,%eax
  jl    2f
  subl  %ebp,%eax
  shll  $4,%esi
  je    3f
2:
  movl  %edi,%ds:(%ebx)
  addl  28(%esp),%ebx
  movl  %ds:(%ebx),%edi
  xorl  %esi,%edi
  loop  1b
  jmp   6f
  .align  4
3:
  movl  %edi,%ds:(%ebx)
  addl  $4,%ebx
  movl  %ds:(%ebx),%edi
  movl  24(%esp),%esi
  jmp   2b

  .align  4
6:
  movl  %edi,%ds:(%ebx)
  movw  %fs,%ax
  movw  %ax,%ds
  popl  %ebx
  popl  %esi
  popl  %edi
  popl  %ebp
  ret

  .align  4
.globl  ___x_rot
___x_rot:
  pushl %ebp
  movl  %esp,%ebp
  subl  $16,%esp
  pushl %edi
  pushl %esi
  pushl %ebx
  movl  _G_et,%ebx      /* et_p = G_et */
  movl  _G_nb,%eax
  movl  %eax,-12(%ebp)  /* i = G_nb.edge */
  testl %eax,%eax       /* if (!i) goto 2f */
  je    2f
1:
  movl  8(%ebx),%eax    /* et_p->y1 */
  imull 12(%ebp)        /* *= l_3 */
  movl  %eax,%esi       /* low */
  movl  %edx,%edi       /* high */
  movl  16(%ebx),%eax   /* et_p->z1 */
  imull 8(%ebp)         /* *= l_2 */
  subl  %esi,%eax       /* subl low */
  sbbl  %edi,%edx       /* subl high+CF */
  testl %eax,%eax       /* if ( >= 0 ) goto 0f */
  jge   0f
  addl  $65535,%eax     /* 負の少数点以下の丸め */
0:
  shrd  $16,%edx,%eax   /* /= GETA_ET */
  movl  %eax,%ecx
  movl  16(%ebx),%eax   /* et_p->z1 */
  movl  %ecx,16(%ebx)   /* et_p->z1 <== */
  imull 12(%ebp)        /* *= l_3 */
  movl  %eax,%esi
  movl  %edx,%edi
  movl  8(%ebx),%eax    /* et_p->y1 */
  imull 8(%ebp)         /* *= l_2 */
  addl  %esi,%eax       /* addl low */
  adcl  %edi,%edx       /* addl high+CF */
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,8(%ebx)    /* et_p->y1 <== */
  movl  12(%ebx),%eax   /* et_p->y2 */
  imull 12(%ebp)        /* *= l_3 */
  movl  %eax,%esi
  movl  %edx,%edi
  movl  20(%ebx),%eax   /* et_p->z2 */
  imull 8(%ebp)         /* *= l_2 */
  subl  %esi,%eax
  sbbl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,%ecx
  movl  20(%ebx),%eax   /* et_p->z2 */
  movl  %ecx,20(%ebx)   /* et_p->z2 <== */
  imull 12(%ebp)        /* *= l_3 */
  movl  %eax,%esi
  movl  %edx,%edi
  movl  12(%ebx),%eax   /* et_p->y2 */
  imull 8(%ebp)         /* *= l_2 */
  addl  %esi,%eax
  adcl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,12(%ebx)   /* et_p->y2 <== */
  addl  $24,%ebx        /* et_p++ */
  decl  -12(%ebp)       /* i-- */
  jne 1b                /* if (i) goto 1b */
2:
  movl  _G_f,%eax       /* if (!test_bit(G_f, f_REV)) goto 0f */
  andl  $0x1000000,%eax
  je    0f
  pushl 12(%ebp)
  pushl 8(%ebp)
  pushl $_G_ps+8
  pushl $_G_ps+4
  movl  _G_pm+8,%eax
  subl  _G_pm+4,%eax
  pushl %eax
  pushl $0
  call  _revolution
0:
  leal  -28(%ebp),%esp
  popl  %ebx
  popl  %esi
  popl  %edi
  leave
  ret

  .align  4
.globl  ___y_rot
___y_rot:
  pushl %ebp
  movl  %esp,%ebp
  subl  $16,%esp
  pushl %edi
  pushl %esi
  pushl %ebx
  movl  _G_et,%ebx
  movl  _G_nb,%eax
  movl  %eax,-12(%ebp)
  testl %eax,%eax
  je    2f
1:
  movl  16(%ebx),%eax
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  (%ebx),%eax
  imull 8(%ebp)
  subl  %esi,%eax
  sbbl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,%ecx
  movl  (%ebx),%eax
  movl  %ecx,(%ebx)
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  16(%ebx),%eax
  imull 8(%ebp)
  addl  %esi,%eax
  adcl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,16(%ebx)
  movl  20(%ebx),%eax
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  4(%ebx),%eax
  imull 8(%ebp)
  subl  %esi,%eax
  sbbl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,%ecx
  movl  4(%ebx),%eax
  movl  %ecx,4(%ebx)
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  20(%ebx),%eax
  imull 8(%ebp)
  addl  %esi,%eax
  adcl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,20(%ebx)
  addl  $24,%ebx
  decl  -12(%ebp)
  jne 1b
2:
  movl  _G_f,%eax
  andl  $0x1000000,%eax
  je    0f
  pushl 12(%ebp)
  pushl 8(%ebp)
  pushl $_G_ps
  pushl $_G_ps+8
  pushl $0
  movl  _G_pm+8,%eax
  subl  _G_pm+4,%eax
  pushl %eax
  call  _revolution
0:
  leal  -28(%ebp),%esp
  popl  %ebx
  popl  %esi
  popl  %edi
  leave
  ret

  .align  4
.globl  ___z_rot
___z_rot:
  pushl %ebp
  movl  %esp,%ebp
  subl  $16,%esp
  pushl %edi
  pushl %esi
  pushl %ebx
  movl  _G_et,%ebx
  movl  _G_nb,%eax
  movl  %eax,-12(%ebp)
  testl %eax,%eax
  je    2f
1:
  movl  8(%ebx),%eax
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  (%ebx),%eax
  imull 8(%ebp)
  subl  %esi,%eax
  sbbl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,%ecx
  movl  (%ebx),%eax
  movl  %ecx,(%ebx)
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  8(%ebx),%eax
  imull 8(%ebp)
  addl  %esi,%eax
  adcl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,8(%ebx)
  movl  12(%ebx),%eax
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  4(%ebx),%eax
  imull 8(%ebp)
  subl  %esi,%eax
  sbbl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,%ecx
  movl  4(%ebx),%eax
  movl  %ecx,4(%ebx)
  imull 12(%ebp)
  movl  %eax,%esi
  movl  %edx,%edi
  movl  12(%ebx),%eax
  imull 8(%ebp)
  addl  %esi,%eax
  adcl  %edi,%edx
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  shrd  $16,%edx,%eax
  movl  %eax,12(%ebx)
  addl  $24,%ebx
  decl  -12(%ebp)
  jne 1b
2:
  movl  _G_f,%eax
  andl  $0x1000000,%eax
  je    0f
  pushl 12(%ebp)
  pushl 8(%ebp)
  pushl $_G_ps
  pushl $_G_ps+4
  pushl $0
  pushl $0
  call  _revolution
0:
  leal  -28(%ebp),%esp
  popl  %ebx
  popl  %esi
  popl  %edi
  leave
  ret

  .align  4
.globl  ___cul_r
___cul_r:
  pushl   %ebp
  pushl   %edi
  pushl   %esi
  pushl %ebx
  movl  %esp,%ebp
  movl  $_G_mv,%ebx
  xorl  %esi,%esi         /* i = 0 */
0:
  movl  8(%ebx,%esi),%eax /* G_mv[i].z */
  movl  24(%ebp),%edi
  sall  $4,%edi
  movl  8(%ebx,%edi),%edx /* G_mv[min_i].z */
  subl  %edx,%eax         /* G_mv[i].z - G_mv[min_i].z */
  imull 28(%ebp)          /* *= r_d */
  idivl 32(%ebp)          /* /= z_d */
  movl  24(%ebp),%edi
  sall  $4,%edi
  movswl  14(%ebx,%edi),%edx
  addl  %edx,%eax         /* += G_mv[min_i].r */
  movw  %ax,14(%ebx,%esi) /* G_mv[i].r <== */
  movl  %esi,%eax         /* &G_mv[i] */
  addl  $16,%esi          /* += sizeof(MOVE) */
  cmpw  $255,12(%ebx,%eax)/* if (G_mv[i].key == EOK) break; */
  jne 0b
1:
  popl  %ebx
  popl  %esi
  popl  %edi
  popl  %ebp
  ret

  .align  4
.globl  ___clip_z1
___clip_z1:
  pushl %ebp
  pushl %edi
  pushl %esi
  pushl %ebx
  movl  %esp,%ebp
  movl  20(%ebp),%ebx     /* &a[0] */
  movl  24(%ebp),%eax     /* z_view */
  subl  16(%ebx),%eax     /* z_view-a[4] */
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  sarl  $16,%eax          /* /= GETA_ET */
  movl  4(%ebx),%edx
  subl  (%ebx),%edx
  imull %edx              /* *= (a[1]-a[0]) */
  movl  20(%ebx),%ecx
  subl  16(%ebx),%ecx
  idivl %ecx              /* /= (a[5]-a[4]) */
  sall  $16,%eax          /* *= GETA_ET */
  addl  (%ebx),%eax       /* += a[0] */
  movl  %eax,(%ebx)       /* a[0] <== */
  movl  24(%ebp),%eax
  subl  16(%ebx),%eax
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  sarl  $16,%eax
  movl  12(%ebx),%edx
  subl  8(%ebx),%edx
  imull %edx
  movl  20(%ebx),%ecx
  subl  16(%ebx),%ecx
  idivl %ecx
  sall  $16,%eax
  addl  8(%ebx),%eax
  movl  %eax,8(%ebx)
  movl  24(%ebp),%eax
  movl  %eax,16(%ebx)
  popl  %ebx
  popl  %esi
  popl  %edi
  popl  %ebp
  ret

  .align  4
.globl  ___clip_z2
___clip_z2:

  pushl %ebp
  pushl %edi
  pushl %esi
  pushl %ebx
  movl  %esp,%ebp
  movl  20(%ebp),%ebx
  movl  24(%ebp),%eax
  subl  20(%ebx),%eax
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  sarl  $16,%eax
  movl  (%ebx),%edx
  subl  4(%ebx),%edx
  imull %edx
  movl  16(%ebx),%ecx
  subl  20(%ebx),%ecx
  idivl %ecx
  sall  $16,%eax
  addl  4(%ebx),%eax
  movl  %eax,4(%ebx)
  movl  24(%ebp),%eax
  subl  20(%ebx),%eax
  testl %eax,%eax
  jge   0f
  addl  $65535,%eax
0:
  sarl  $16,%eax
  movl  8(%ebx),%edx
  subl  12(%ebx),%edx
  imull %edx
  movl  16(%ebx),%ecx
  subl  20(%ebx),%ecx
  idivl %ecx
  sall  $16,%eax
  addl  12(%ebx),%eax
  movl  %eax,12(%ebx)
  movl  24(%ebp),%eax
  movl  %eax,20(%ebx)
  popl  %ebx
  popl  %esi
  popl  %edi
  popl  %ebp
  ret