fsqrt.c 746 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. fsqrt(void *frD, void *frB)
  10. {
  11. FP_DECL_D(B);
  12. FP_DECL_D(R);
  13. FP_DECL_EX;
  14. #ifdef DEBUG
  15. printk("%s: %p %p %p %p\n", __func__, frD, frB);
  16. #endif
  17. FP_UNPACK_DP(B, frB);
  18. #ifdef DEBUG
  19. printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  20. #endif
  21. if (B_s && B_c != FP_CLS_ZERO)
  22. FP_SET_EXCEPTION(EFLAG_VXSQRT);
  23. if (B_c == FP_CLS_NAN)
  24. FP_SET_EXCEPTION(EFLAG_VXSNAN);
  25. FP_SQRT_D(R, B);
  26. #ifdef DEBUG
  27. printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
  28. #endif
  29. __FP_PACK_D(frD, R);
  30. return FP_CUR_EXCEPTIONS;
  31. }