llvm-project/compiler-rt/lib/builtins/arm/divsf3vfp.S

//===-- divsf3vfp.S - Implement divsf3vfp ---------------------------------===//
//
//                     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 __divsf3vfp(float a, float b);
//
// Divides 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(__divsf3vfp)
	vmov	s14, r0		// move first param from r0 into float register
	vmov	s15, r1		// move second param from r1 into float register
	vdiv.f32 s13, s14, s15
	vmov	r0, s13		// move result back to r0
	bx	lr
END_COMPILERRT_FUNCTION(__divsf3vfp)

NO_EXEC_STACK_DIRECTIVE
start adding implementation of arm *vfp routines with test cases llvm-svn: 81558 2009-09-12 04:02:01 +08:00			`//===-- divsf3vfp.S - Implement divsf3vfp ---------------------------------===//`
			`//`
			`// The LLVM Compiler Infrastructure`
			`//`
license change llvm-svn: 119397 2010-11-17 06:13:33 +08:00			`// This file is dual licensed under the MIT and the University of Illinois Open`
			`// Source Licenses. See LICENSE.TXT for details.`
start adding implementation of arm *vfp routines with test cases llvm-svn: 81558 2009-09-12 04:02:01 +08:00			`//`
			`//===----------------------------------------------------------------------===//`

Add assembly.h for use in .S files. llvm-svn: 85263 2009-10-28 01:49:50 +08:00			`#include "../assembly.h"`
start adding implementation of arm *vfp routines with test cases llvm-svn: 81558 2009-09-12 04:02:01 +08:00
			`//`
			`// extern float __divsf3vfp(float a, float b);`
			`//`
			`// Divides two single precision floating point numbers using the Darwin`
			`// calling convention where single arguments are passsed like 32-bit ints.`
			`//`
Change ARM vfp assembly functions to use unified syntax. llvm-svn: 138332 2011-08-24 00:40:18 +08:00			`.syntax unified`
[CompilerRT] use .p2align, .balign instead of .align The .align statements in ARM assembly routines is actually meant to be a power of 2 alignment (e.g. .align 2 == 4 byte alignment, not 2). Switch to using .p2align. .p2align is guaranteed to be a power-of-two alignment always and much more explicit. The .align in the case of x86_64 is byte alignment, use .balign instead of .align. llvm-svn: 208578 2014-05-12 23:23:37 +08:00			`.p2align 2`
Switch to using DEFINE_COMPILERRT_[PRIVATE_]FUNCTION to define function symbols inside .S files. llvm-svn: 85264 2009-10-28 01:50:21 +08:00			`DEFINE_COMPILERRT_FUNCTION(__divsf3vfp)`
Change ARM vfp assembly functions to use unified syntax. llvm-svn: 138332 2011-08-24 00:40:18 +08:00			`vmov s14, r0 // move first param from r0 into float register`
			`vmov s15, r1 // move second param from r1 into float register`
			`vdiv.f32 s13, s14, s15`
			`vmov r0, s13 // move result back to r0`
start adding implementation of arm *vfp routines with test cases llvm-svn: 81558 2009-09-12 04:02:01 +08:00			`bx lr`
Mechanically add end-of-function markers. llvm-svn: 200005 2014-01-24 22:33:42 +08:00			`END_COMPILERRT_FUNCTION(__divsf3vfp)`
builtins: tag with noexecstack These routines do not require executable stacks. However, by default ELFish linkers may assume an executable stack on GNUish environments (and some non-GNU ones too!). The GNU extension to add a note to indicate a non-executable stack is honoured by these environments to mark the stack as non-executable (the compiler normally emits this directive on appropriate targets whenever possible). This allows normal builds from getting executable stacks due to linking to the compiler rt builtins. llvm-svn: 273500 2016-06-23 06:09:42 +08:00
			`NO_EXEC_STACK_DIRECTIVE`