kernel/2.6.29.6-aldebaran-rt/arch/powerpc/math-emu/fsel.c

   1 #include <linux/types.h>
   2 #include <linux/errno.h>
   3 #include <asm/uaccess.h>
   4
   5 #include <asm/sfp-machine.h>
   6 #include <math-emu/soft-fp.h>
   7 #include <math-emu/double.h>
   8
   9 int
  10 fsel(u32 *frD, void *frA, u32 *frB, u32 *frC)
  11 {
  12         FP_DECL_D(A);
  13         FP_DECL_EX;
  14
  15 #ifdef DEBUG
  16         printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
  17 #endif
  18
  19         FP_UNPACK_DP(A, frA);
  20
  21 #ifdef DEBUG
  22         printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  23         printk("B: %08x %08x\n", frB[0], frB[1]);
  24         printk("C: %08x %08x\n", frC[0], frC[1]);
  25 #endif
  26
  27         if (A_c == FP_CLS_NAN || (A_c != FP_CLS_ZERO && A_s)) {
  28                 frD[0] = frB[0];
  29                 frD[1] = frB[1];
  30         } else {
  31                 frD[0] = frC[0];
  32                 frD[1] = frC[1];
  33         }
  34
  35 #ifdef DEBUG
  36         printk("D: %08x.%08x\n", frD[0], frD[1]);
  37 #endif
  38
  39         return 0;
  40 }