diff options
Diffstat (limited to 'lib/builtins/subdf3.c')
-rw-r--r-- | lib/builtins/subdf3.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/builtins/subdf3.c b/lib/builtins/subdf3.c new file mode 100644 index 000000000000..089e062415b7 --- /dev/null +++ b/lib/builtins/subdf3.c @@ -0,0 +1,26 @@ +//===-- 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" + +ARM_EABI_FNALIAS(dsub, subdf3) + +// 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)); +} + +/* FIXME: rsub for ARM EABI */ |