sysdeps/i386/fpu/s_remquof.S

   1 /*
   2  * Public domain.
   3  */
   4
   5 #include <machine/asm.h>
   6 #include <libm-alias-float.h>
   7
   8 #define PARMS   4               /* no space for saved regs */
   9 #define DVDND   PARMS
  10 #define DVSOR   DVDND+4
  11 #define QUOP    DVSOR+4
  12
  13         .text
  14 ENTRY (__remquof)
  15
  16         flds    DVSOR(%esp)
  17         flds    DVDND(%esp)
  18 1:      fprem1
  19         fstsw   %ax
  20         sahf
  21         jp      1b
  22         fstp    %st(1)
  23         /* Compute the congruent of the quotient.  */
  24         movl    %eax, %ecx
  25         shrl    $8, %eax
  26         shrl    $12, %ecx
  27         andl    $4, %ecx
  28         andl    $3, %eax
  29         orl     %eax, %ecx
  30         leal    (%ecx,%ecx,2),%ecx
  31         movl    $0xef2a60, %eax
  32         shrl    %cl, %eax
  33         andl    $7, %eax
  34         movl    QUOP(%esp), %ecx
  35         movl    DVDND(%esp), %edx
  36         xorl    DVSOR(%esp), %edx
  37         testl   $0x80000000, %edx
  38         jz      1f
  39         negl    %eax
  40 1:      movl    %eax, (%ecx)
  41
  42         ret
  43 END (__remquof)
  44 libm_alias_float (__remquo, remquo)