llvm-project/compiler-rt/lib/builtins/arm/sync_fetch_and_min_4.S

/*===-- sync_fetch_and_min_4.S - ------------------------------------------===//
 *
 *                     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 the __sync_fetch_and_min_4 function for the ARM
 * architecture.
 *
 *===----------------------------------------------------------------------===*/

#include "sync-ops.h"

#define min_4(rD, rN, rM) MINMAX_4(rD, rN, rM, lt)

SYNC_OP_4(min_4)

NO_EXEC_STACK_DIRECTIVE
ARM: implement __sync_fetch_and_* operations Since these are primarily useful for deeply embedded targets where code size is very important, they are each in a separate file making use of infrastructure in sync-ops.h. This allows a linker to include just the functions that are actually used. rdar://problem/14736665 llvm-svn: 202812 2014-03-04 18:10:17 +08:00			`/*===-- sync_fetch_and_min_4.S - ------------------------------------------===//`
			`*`
			`* 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 the __sync_fetch_and_min_4 function for the ARM`
			`* architecture.`
			`*`
			`===----------------------------------------------------------------------===/`

			`#include "sync-ops.h"`

			`#define min_4(rD, rN, rM) MINMAX_4(rD, rN, rM, lt)`

			`SYNC_OP_4(min_4)`

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`