arch/ppc/math-emu/mcrfs.c

   1 #include <linux/types.h>
   2 #include <linux/errno.h>
   3 #include <asm/uaccess.h>
   4
   5 #include "soft-fp.h"
   6
   7 int
   8 mcrfs(u32 *ccr, u32 crfD, u32 crfS)
   9 {
  10         u32 value, clear;
  11
  12 #ifdef DEBUG
  13         printk("%s: %p (%08x) %d %d\n", __FUNCTION__, ccr, *ccr, crfD, crfS);
  14 #endif
  15
  16         clear = 15 << ((7 - crfS) << 2);
  17         if (!crfS)
  18                 clear = 0x90000000;
  19
  20         value = (__FPU_FPSCR >> ((7 - crfS) << 2)) & 15;
  21         __FPU_FPSCR &= ~(clear);
  22
  23         *ccr &= ~(15 << ((7 - crfD) << 2));
  24         *ccr |= (value << ((7 - crfD) << 2));
  25
  26 #ifdef DEBUG
  27         printk("CR: %08x\n", __FUNCTION__, *ccr);
  28 #endif
  29
  30         return 0;
  31 }