fmul.c 1021 B

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  1. // SPDX-License-Identifier: GPL-2.0
  2. #include <linux/types.h>
  3. #include <linux/errno.h>
  4. #include <linux/uaccess.h>
  5. #include <asm/sfp-machine.h>
  6. #include <math-emu/soft-fp.h>
  7. #include <math-emu/double.h>
  8. int
  9. fmul(void *frD, void *frA, void *frB)
  10. {
  11. FP_DECL_D(A);
  12. FP_DECL_D(B);
  13. FP_DECL_D(R);
  14. FP_DECL_EX;
  15. #ifdef DEBUG
  16. printk("%s: %p %p %p\n", __func__, frD, frA, frB);
  17. #endif
  18. FP_UNPACK_DP(A, frA);
  19. FP_UNPACK_DP(B, frB);
  20. #ifdef DEBUG
  21. printk("A: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
  22. A_s, A_f1, A_f0, A_e, A_c, A_f1, A_f0, A_e + 1023);
  23. printk("B: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
  24. B_s, B_f1, B_f0, B_e, B_c, B_f1, B_f0, B_e + 1023);
  25. #endif
  26. if ((A_c == FP_CLS_INF && B_c == FP_CLS_ZERO) ||
  27. (A_c == FP_CLS_ZERO && B_c == FP_CLS_INF))
  28. FP_SET_EXCEPTION(EFLAG_VXIMZ);
  29. FP_MUL_D(R, A, B);
  30. #ifdef DEBUG
  31. printk("D: %ld %lu %lu %ld (%ld) [%08lx.%08lx %lx]\n",
  32. R_s, R_f1, R_f0, R_e, R_c, R_f1, R_f0, R_e + 1023);
  33. #endif
  34. __FP_PACK_D(frD, R);
  35. return FP_CUR_EXCEPTIONS;
  36. }