linux/arch/powerpc/math-emu/fsel.c
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   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
   9int
  10fsel(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}
  41