Cross Reference: /src/lib/libc/arch/i386/gen/fpsetround.S

fpsetround.S revision 1.1

      1 /*
      2  * Written by Charles M. Hannum, Apr 9, 1995
      3  * Public domain.
      4  */
      5 
      6 #include <machine/asm.h>
      7 
      8 ENTRY(fpsetround)
      9 	subl $4,%esp
     10 
     11 	fnstcw (%esp)
     12 	movl (%esp),%eax
     13 
     14 	rorl $10,%eax
     15 	movl %eax,%edx
     16 	andl $3,%eax
     17 
     18 	subl %eax,%edx
     19 	movl 8(%esp),%ecx
     20 	andl $3,%ecx
     21 	orl %ecx,%edx
     22 	roll $10,%edx
     23 	movl %edx,(%esp)
     24 	fldcw (%esp)
     25 
     26 	addl $4,%esp
     27 	ret
     28