arch/powerpc/math-emu/fsqrts.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 #include <math-emu/single.h>
  10
  11 int
  12 fsqrts(void *frD, void *frB)
  13 {
  14         FP_DECL_D(B);
  15         FP_DECL_D(R);
  16         FP_DECL_EX;
  17
  18 #ifdef DEBUG
  19         printk("%s: %p %p %p %p\n", __func__, frD, frB);
  20 #endif
  21
  22         FP_UNPACK_DP(B, frB);
  23
  24 #ifdef DEBUG
  25         printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  26 #endif
  27
  28         if (B_s && B_c != FP_CLS_ZERO)
  29                 FP_SET_EXCEPTION(EFLAG_VXSQRT);
  30         if (B_c == FP_CLS_NAN)
  31                 FP_SET_EXCEPTION(EFLAG_VXSNAN);
  32
  33         FP_SQRT_D(R, B);
  34
  35 #ifdef DEBUG
  36         printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  37 #endif
  38
  39         __FP_PACK_DS(frD, R);
  40
  41         return FP_CUR_EXCEPTIONS;
  42 }