[rustc.git] / src / llvm / projects / compiler-rt / lib / subdf3.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"

fp_t COMPILER_RT_ABI __adddf3(fp_t a, fp_t b);


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 */
Commit	Line	Data
223e47cc LB	1	//===-- lib/adddf3.c - Double-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 double-precision soft-float subtraction with the
	11	// IEEE-754 default rounding (to nearest, ties to even).
	12	//
	13	//===----------------------------------------------------------------------===//
	14
	15	#define DOUBLE_PRECISION
	16	#include "fp_lib.h"
	17
	18	fp_t COMPILER_RT_ABI __adddf3(fp_t a, fp_t b);
	19
	20
	21	ARM_EABI_FNALIAS(dsub, subdf3)
	22
	23	// Subtraction; flip the sign bit of b and add.
	24	COMPILER_RT_ABI fp_t
	25	__subdf3(fp_t a, fp_t b) {
	26	return __adddf3(a, fromRep(toRep(b) ^ signBit));
	27	}
	28
	29	/* FIXME: rsub for ARM EABI */