aboutsummaryrefslogblamecommitdiff
path: root/lib/builtins/arm/subsf3vfp.S
blob: 3e83ea26507dc4794aec5aa67409cc00a83a0083 (plain) (tree)
1
2
3
4
5
6



                                                                                

                                                                               







                                                                                
                                                                             


                                                                         
                       
                  
                                       

                                     
     



                                                                                
      
                  
                                    


                       
//===-- subsf3vfp.S - Implement subsf3vfp ---------------------------------===//
//
//                     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.
//
//===----------------------------------------------------------------------===//

#include "../assembly.h"

//
// extern float __subsf3vfp(float a, float b);
//
// Returns the difference between two single precision floating point numbers
// using the Darwin calling convention where single arguments are passsed
// like 32-bit ints.
//
	.syntax unified
	.p2align 2
DEFINE_COMPILERRT_FUNCTION(__subsf3vfp)
#if defined(COMPILER_RT_ARMHF_TARGET)
	vsub.f32 s0, s0, s1
#else
	vmov	s14, r0		// move first param from r0 into float register
	vmov	s15, r1		// move second param from r1 into float register
	vsub.f32 s14, s14, s15
	vmov	r0, s14		// move result back to r0
#endif
	bx	lr
END_COMPILERRT_FUNCTION(__subsf3vfp)

NO_EXEC_STACK_DIRECTIVE