/* * Copyright (c) 2013, 2017 embedded brains GmbH. All rights reserved. * * embedded brains GmbH * Dornierstr. 4 * 82178 Puchheim * Germany * * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rtems.org/license/LICENSE. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include .section .text #ifdef __thumb__ FUNCTION_THUMB_ENTRY(_CPU_Context_volatile_clobber) #else FUNCTION_ENTRY(_CPU_Context_volatile_clobber) #endif .macro clobber_register reg sub r0, r0, #1 mov \reg, r0 .endm #ifdef ARM_MULTILIB_VFP vmrs r1, FPSCR ldr r2, =0xf000001f bic r1, r1, r2 and r2, r2, r0 orr r1, r1, r2 vmsr FPSCR, r1 .macro clobber_vfp_register reg sub r0, r0, #1 vmov \reg, r0, r0 .endm clobber_vfp_register d0 clobber_vfp_register d1 clobber_vfp_register d2 clobber_vfp_register d3 clobber_vfp_register d4 clobber_vfp_register d5 clobber_vfp_register d6 clobber_vfp_register d7 #ifdef ARM_MULTILIB_VFP_D32 clobber_vfp_register d16 clobber_vfp_register d17 clobber_vfp_register d18 clobber_vfp_register d19 clobber_vfp_register d20 clobber_vfp_register d21 clobber_vfp_register d22 clobber_vfp_register d23 clobber_vfp_register d24 clobber_vfp_register d25 clobber_vfp_register d26 clobber_vfp_register d27 clobber_vfp_register d28 clobber_vfp_register d29 clobber_vfp_register d30 clobber_vfp_register d31 #endif /* ARM_MULTILIB_VFP_D32 */ #endif /* ARM_MULTILIB_VFP */ clobber_register r1 clobber_register r2 clobber_register r3 clobber_register r12 bx lr FUNCTION_END(_CPU_Context_volatile_clobber)