common/lib/libc/arch/arm/features.c

   1 /* $NetBSD: features.c,v 1.1 2014/02/27 09:37:02 matt Exp $ */
   2 /*-
   3  * Copyright (c) 2014 The NetBSD Foundation, Inc.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software contributed to The NetBSD Foundation
   7  * by Matt Thomas of 3am Software Foundry.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * This file is used to have the compiler check for feature and then
  33  * have make set a variable based on that test.
  34  *
  35  * FEAT_EABI!=if ${COMPILE.c} -fsyntax-only -DEABI_TEST ${TESTFILE} >/dev/null 2>/dev/null; then echo yes; else echo no; fi
  36  * FEAT_LDREX!=if ${COMPILE.c} -fsyntax-only -DLDREX_TEST ${TESTFILE} >/dev/null 2>/dev/null; then echo yes; else echo no; fi
  37  * FEAT_LDRD!=if ${COMPILE.c} -fsyntax-only -DLDRD_TEST ${TESTFILE} >/dev/null 2>/dev/null; then echo yes; else echo no; fi
  38  * FEAT_THUMB2!=if ${COMPILE.c} -fsyntax-only -DTHUMB2_TEST ${TESTFILE} >/dev/null 2>/dev/null; then echo yes; else echo no; fi
  39  */
  40
  41 #if defined (__ARM_ARCH_8A__)  || defined (__ARM_ARCH_7__) || \
  42     defined (__ARM_ARCH_7A__)  || defined (__ARM_ARCH_7R__) || \
  43     defined (__ARM_ARCH_7M__)  || defined (__ARM_ARCH_7EM__) || \
  44     defined (__ARM_ARCH_6T2__)
  45 #define HAVE_THUMB2
  46 #endif
  47
  48 #if defined (HAVE_THUMB2) || defined (__ARM_ARCH_6__) || \
  49     defined (__ARM_ARCH_6J__)  || defined (__ARM_ARCH_6K__) || \
  50     defined (__ARM_ARCH_6Z__)  || defined (__ARM_ARCH_6ZK__) || \
  51     defined (__ARM_ARCH_6ZM__)
  52 #define HAVE_LDREX
  53 #endif
  54
  55 #if defined (HAVE_LDREX) || defined(__ARM_ARCH_5TE__) || \
  56     defined (__ARM_ARCH_5TEJ__)
  57 #define HAVE_LDRD
  58 #endif
  59
  60 #if defined(THUMB2_TEST) && !defined(HAVE_THUMB2)
  61 #error no thumb2
  62 #endif
  63
  64 #if defined(LDREX_TEST) && !defined(HAVE_LDREX)
  65 #error no ldrex
  66 #endif
  67
  68 #if defined(LDRD_TEST) && !defined(HAVE_LDRD)
  69 #error no ldrd
  70 #endif
  71
  72 #if defined(EABI_TEST) && !defined(__ARM_EABI__)
  73 #error not eabi
  74 #endif