arch/powerpc/math-emu/fmuls.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 fmuls(void *frD, void *frA, void *frB)
  13 {
  14         FP_DECL_D(A);
  15         FP_DECL_D(B);
  16         FP_DECL_D(R);
  17         FP_DECL_EX;
  18
  19 #ifdef DEBUG
  20         printk("%s: %p %p %p\n", __func__, frD, frA, frB);
  21 #endif
  22
  23         FP_UNPACK_DP(A, frA);
  24         FP_UNPACK_DP(B, frB);
  25
  26 #ifdef DEBUG
  27         printk("A: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
  28                A_s, A_f1, A_f0, A_e, A_c, A_f1, A_f0, A_e + 1023);
  29         printk("B: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
  30                B_s, B_f1, B_f0, B_e, B_c, B_f1, B_f0, B_e + 1023);
  31 #endif
  32
  33         if ((A_c == FP_CLS_INF && B_c == FP_CLS_ZERO) ||
  34             (A_c == FP_CLS_ZERO && B_c == FP_CLS_INF))
  35                 FP_SET_EXCEPTION(EFLAG_VXIMZ);
  36
  37         FP_MUL_D(R, A, B);
  38
  39 #ifdef DEBUG
  40         printk("D: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
  41                R_s, R_f1, R_f0, R_e, R_c, R_f1, R_f0, R_e + 1023);
  42 #endif
  43
  44         __FP_PACK_DS(frD, R);
  45
  46         return FP_CUR_EXCEPTIONS;
  47 }