arch/powerpc/math-emu/fsel.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3 #include <linux/errno.h>
   4 #include <linux/uaccess.h>
   5
   6 #include <asm/sfp-machine.h>
   7 #include <math-emu/soft-fp.h>
   8 #include <math-emu/double.h>
   9
  10 int
  11 fsel(u32 *frD, void *frA, u32 *frB, u32 *frC)
  12 {
  13         FP_DECL_D(A);
  14         FP_DECL_EX;
  15
  16 #ifdef DEBUG
  17         printk("%s: %p %p %p %p\n", __func__, frD, frA, frB, frC);
  18 #endif
  19
  20         FP_UNPACK_DP(A, frA);
  21
  22 #ifdef DEBUG
  23         printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  24         printk("B: %08x %08x\n", frB[0], frB[1]);
  25         printk("C: %08x %08x\n", frC[0], frC[1]);
  26 #endif
  27
  28         if (A_c == FP_CLS_NAN || (A_c != FP_CLS_ZERO && A_s)) {
  29                 frD[0] = frB[0];
  30                 frD[1] = frB[1];
  31         } else {
  32                 frD[0] = frC[0];
  33                 frD[1] = frC[1];
  34         }
  35
  36 #ifdef DEBUG
  37         printk("D: %08x.%08x\n", frD[0], frD[1]);
  38 #endif
  39
  40         return 0;
  41 }