LXR linux/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
  10int
  11fsel(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}
  42