subtf3.c 879 B

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  1. //===-- lib/subtf3.c - Quad-precision subtraction -----------------*- C -*-===//
  2. //
  3. // The LLVM Compiler Infrastructure
  4. //
  5. // This file is dual licensed under the MIT and the University of Illinois Open
  6. // Source Licenses. See LICENSE.TXT for details.
  7. //
  8. //===----------------------------------------------------------------------===//
  9. //
  10. // This file implements quad-precision soft-float subtraction with the
  11. // IEEE-754 default rounding (to nearest, ties to even).
  12. //
  13. //===----------------------------------------------------------------------===//
  14. #define QUAD_PRECISION
  15. #include "fp_lib.h"
  16. #if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
  17. COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b);
  18. // Subtraction; flip the sign bit of b and add.
  19. COMPILER_RT_ABI fp_t
  20. __subtf3(fp_t a, fp_t b) {
  21. return __addtf3(a, fromRep(toRep(b) ^ signBit));
  22. }
  23. #endif