svn commit: r302423 - vendor/gcc/dist/gcc/config/i386

2016-07-07

Author: pfg
Date: Fri Jul  8 03:39:10 2016
New Revision: 302423
URL: https://svnweb.freebsd.org/changeset/base/302423

Log:
  Vendor GCC: Bring older verbatim version of cpuid.h
  
  This is mainly for reference: clang has a similar file with minor
  differences that may be affecting portability.
  
  Obtained from:GCC (gcc-4_3-branch, rev. 129548, pre GPLv3)

Added:
  vendor/gcc/dist/gcc/config/i386/cpuid.h   (contents, props changed)

Added: vendor/gcc/dist/gcc/config/i386/cpuid.h
==

--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ vendor/gcc/dist/gcc/config/i386/cpuid.h Fri Jul  8 03:39:10 2016
(r302423)
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2007 Free Software Foundation, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ * 
+ * In addition to the permissions in the GNU General Public License, the
+ * Free Software Foundation gives you unlimited permission to link the
+ * compiled version of this file with other programs, and to distribute
+ * those programs without any restriction coming from the use of this
+ * file.  (The General Public License restrictions do apply in other
+ * respects; for example, they cover modification of the file, and
+ * distribution when not linked into another program.)
+ * 
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ * 
+ *As a special exception, if you link this library with files
+ *compiled with GCC to produce an executable, this does not cause
+ *the resulting executable to be covered by the GNU General Public License.
+ *This exception does not however invalidate any other reasons why
+ *the executable file might be covered by the GNU General Public License.
+ */
+
+/* %ecx */
+#define bit_SSE3   (1 << 0)
+#define bit_SSSE3  (1 << 9)
+#define bit_CMPXCHG16B (1 << 13)
+#define bit_SSE4_1 (1 << 19)
+#define bit_SSE4_2 (1 << 20)
+#define bit_POPCNT (1 << 23)
+
+/* %edx */
+#define bit_CMPXCHG8B  (1 << 8)
+#define bit_CMOV   (1 << 15)
+#define bit_MMX(1 << 23)
+#define bit_FXSAVE (1 << 24)
+#define bit_SSE(1 << 25)
+#define bit_SSE2   (1 << 26)
+
+/* Extended Features */
+/* %ecx */
+#define bit_LAHF_LM(1 << 0)
+#define bit_SSE4a  (1 << 6)
+#define bit_SSE5   (1 << 11)
+
+/* %edx */
+#define bit_LM (1 << 29)
+#define bit_3DNOWP (1 << 30)
+#define bit_3DNOW  (1 << 31)
+
+
+#if defined(__i386__) && defined(__PIC__)
+/* %ebx may be the PIC register.  */
+#define __cpuid(level, a, b, c, d) \
+  __asm__ ("xchg{l}\t{%%}ebx, %1\n\t"  \
+  "cpuid\n\t"  \
+  "xchg{l}\t{%%}ebx, %1\n\t"   \
+  : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
+  : "0" (level))
+#else
+#define __cpuid(level, a, b, c, d) \
+  __asm__ ("cpuid\n\t" \
+  : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
+  : "0" (level))
+#endif
+
+/* Return highest supported input value for cpuid instruction.  ext can
+   be either 0x0 or 0x800 to return highest supported value for
+   basic or extended cpuid information.  Function returns 0 if cpuid
+   is not supported or whatever cpuid returns in eax register.  If sig
+   pointer is non-null, then first four bytes of the signature
+   (as found in ebx register) are returned in location pointed by sig.  */
+
+static __inline unsigned int
+__get_cpuid_max (unsigned int __ext, unsigned int *__sig)
+{
+  unsigned int __eax, __ebx, __ecx, __edx;
+
+#ifndef __x86_64__
+  /* See if we can use cpuid.  On AMD64 we always can.  */
+  __asm__ ("pushf{l|d}\n\t"
+  "pushf{l|d}\n\t"
+  "pop{l}\t%0\n\t"
+  "mov{l}\t{%0, %1|%1, %0}\n\t"
+  "xor{l}\t{%2, %0|%0, %2}\n\t"
+  "push{l}\t%0\n\t"
+  "popf{l|d}\n\t"
+  "pushf{l|d}\n\t"
+  "pop{l}\t%0\n\t"
+  "popf{l|d}\n\t"
+  : "=" (__eax), "=" (__ebx)
+  : "i" (0x0020));
+
+  if (!((__eax ^ __ebx) & 0x0020))
+return 0;
+#endif
+
+  /* Host supports cpuid.  Return highest supported cpuid input value.  */
+  __cpuid (__ext, __eax, __ebx, __ecx, __edx);
+
+  if (__sig)
+*__sig = __ebx;
+
+  return 

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