1 //===-- lib/subsf3.c - Single-precision subtraction ---------------*- C -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements single-precision soft-float subtraction with the
11 // IEEE-754 default rounding (to nearest, ties to even).
13 //===----------------------------------------------------------------------===//
15 #define SINGLE_PRECISION
18 // Subtraction; flip the sign bit of b and add.
20 __subsf3(fp_t a, fp_t b) {
21 return __addsf3(a, fromRep(toRep(b) ^ signBit));
24 #if defined(__ARM_EABI__)
25 #if defined(COMPILER_RT_ARMHF_TARGET)
26 AEABI_RTABI fp_t __aeabi_fsub(fp_t a, fp_t b) {
27 return __subsf3(a, b);
30 AEABI_RTABI fp_t __aeabi_fsub(fp_t a, fp_t b) COMPILER_RT_ALIAS(__subsf3);