From 97af5a2efbe30726ce4d7c921efed6afc32a314f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@googlemail.com>
Date: Sun, 25 Dec 2016 13:41:19 +0100
Subject: [PATCH] NEON autodetection segfaults: assume neon present
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If TUNE_FEATURES contain 'neon' we can assume our machine supports it

Upstream-Status: Inappropriate [embedded specific]

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
---
 simd-support/neon.c | 46 +---------------------------------------------
 1 file changed, 1 insertion(+), 45 deletions(-)

diff --git a/simd-support/neon.c b/simd-support/neon.c
index 86b2cb6..8d6537e 100644
--- a/simd-support/neon.c
+++ b/simd-support/neon.c
@@ -23,54 +23,10 @@
 
 #if HAVE_NEON
 
-/* check for an environment where signals are known to work */
-#if defined(unix) || defined(linux)
-  # include <signal.h>
-  # include <setjmp.h>
-
-  static jmp_buf jb;
-
-  static void sighandler(int x)
-  {
-       UNUSED(x);
-       longjmp(jb, 1);
-  }
-
-  static int really_have_neon(void)
-  {
-       void (*oldsig)(int);
-       oldsig = signal(SIGILL, sighandler);
-       if (setjmp(jb)) {
-	    signal(SIGILL, oldsig);
-	    return 0;
-       } else {
-	    /* paranoia: encode the instruction in binary because the
-	       assembler may not recognize it without -mfpu=neon */
-	    /*asm volatile ("vand q0, q0, q0");*/
-	    asm volatile (".long 0xf2000150");
-	    signal(SIGILL, oldsig);
-	    return 1;
-       }
-  }
-
-  int X(have_simd_neon)(void)
-  {
-       static int init = 0, res;
-
-       if (!init) {
-	    res = really_have_neon();
-	    init = 1;
-       }
-       return res;
-  }
-
-
-#else
-/* don't know how to autodetect NEON; assume it is present */
+/* autodetect NEON broken; assume it is present */
   int X(have_simd_neon)(void)
   {
        return 1;
   }
-#endif
 
 #endif
-- 
2.5.5

