30 lines
881 B
C
30 lines
881 B
C
//===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements double-precision soft-float subtraction with the
|
|
// IEEE-754 default rounding (to nearest, ties to even).
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#define DOUBLE_PRECISION
|
|
#include "fp_lib.h"
|
|
|
|
// Subtraction; flip the sign bit of b and add.
|
|
COMPILER_RT_ABI fp_t
|
|
__subdf3(fp_t a, fp_t b) {
|
|
return __adddf3(a, fromRep(toRep(b) ^ signBit));
|
|
}
|
|
|
|
#if defined(__ARM_EABI__)
|
|
AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) {
|
|
return __subdf3(a, b);
|
|
}
|
|
#endif
|
|
|