From e2de64d6f1beb9e492daf5b886e19933c1fa41dd Mon Sep 17 00:00:00 2001
From: toma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>
Date: Wed, 25 Nov 2009 17:56:58 +0000
Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
 BUG:215923

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
---
 mpeglib/lib/util/mmx/cpu_accel.c | 162 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 mpeglib/lib/util/mmx/cpu_accel.c

(limited to 'mpeglib/lib/util/mmx/cpu_accel.c')

diff --git a/mpeglib/lib/util/mmx/cpu_accel.c b/mpeglib/lib/util/mmx/cpu_accel.c
new file mode 100644
index 00000000..8f138308
--- /dev/null
+++ b/mpeglib/lib/util/mmx/cpu_accel.c
@@ -0,0 +1,162 @@
+/*
+ * cpu_accel.c
+ * Copyright (C) 2000-2001 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec 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 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec 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; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "config.h"
+
+#if defined(MMX_SUPPORT) || defined(INTEL)
+#define ARCH_X86 1
+#endif
+
+#include <inttypes.h>
+
+#include "mm_accel.h"
+
+#ifdef ARCH_X86
+static uint32_t arch_accel (void)
+{
+    uint32_t eax, ebx, ecx, edx;
+    int AMD;
+    uint32_t caps;
+
+#ifndef PIC
+#define cpuid(op,eax,ebx,ecx,edx)	\
+    __asm__ ("cpuid"			\
+	 : "=a" (eax),			\
+	   "=b" (ebx),			\
+	   "=c" (ecx),			\
+	   "=d" (edx)			\
+	 : "a" (op)			\
+	 : "cc")
+#else	/* PIC version : save ebx */
+#define cpuid(op,eax,ebx,ecx,edx)	\
+    __asm__ ("pushl %%ebx\n\t"		\
+	 "cpuid\n\t"			\
+	 "movl %%ebx,%1\n\t"		\
+	 "popl %%ebx"			\
+	 : "=a" (eax),			\
+	   "=r" (ebx),			\
+	   "=c" (ecx),			\
+	   "=d" (edx)			\
+	 : "a" (op)			\
+	 : "cc")
+#endif
+
+    __asm__ ("pushfl\n\t"
+	 "pushfl\n\t"
+	 "popl %0\n\t"
+	 "movl %0,%1\n\t"
+	 "xorl $0x200000,%0\n\t"
+	 "pushl %0\n\t"
+	 "popfl\n\t"
+	 "pushfl\n\t"
+	 "popl %0\n\t"
+	 "popfl"
+         : "=r" (eax),
+	   "=r" (ebx)
+	 :
+	 : "cc");
+
+    if (eax == ebx)		/* no cpuid */
+	return 0;
+
+    cpuid (0x00000000, eax, ebx, ecx, edx);
+    if (!eax)			/* vendor string only */
+	return 0;
+
+    AMD = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
+
+    cpuid (0x00000001, eax, ebx, ecx, edx);
+    if (! (edx & 0x00800000))	/* no MMX */
+	return 0;
+
+    caps = MM_ACCEL_X86_MMX;
+    if (edx & 0x02000000)	/* SSE - identical to AMD MMX extensions */
+	caps = MM_ACCEL_X86_MMX | MM_ACCEL_X86_MMXEXT;
+
+    cpuid (0x80000000, eax, ebx, ecx, edx);
+    if (eax < 0x80000001)	/* no extended capabilities */
+	return caps;
+
+    cpuid (0x80000001, eax, ebx, ecx, edx);
+
+    if (edx & 0x80000000)
+	caps |= MM_ACCEL_X86_3DNOW;
+
+    if (AMD && (edx & 0x00400000))	/* AMD MMX extensions */
+	caps |= MM_ACCEL_X86_MMXEXT;
+
+    return caps;
+}
+#endif /* ARCH_X86 */
+
+#ifdef ARCH_PPC
+#include <signal.h>
+#include <setjmp.h>
+
+static sigjmp_buf jmpbuf;
+static volatile sig_atomic_t canjump = 0;
+
+static RETSIGTYPE sigill_handler (int sig)
+{
+    if (!canjump) {
+	signal (sig, SIG_DFL);
+	raise (sig);
+    }
+
+    canjump = 0;
+    siglongjmp (jmpbuf, 1);
+}
+
+static uint32_t arch_accel (void)
+{
+    signal (SIGILL, sigill_handler);
+    if (sigsetjmp (jmpbuf, 1)) {
+	signal (SIGILL, SIG_DFL);
+	return 0;
+    }
+
+    canjump = 1;
+
+    __asm__ volatile ("mtspr 256,%0" :: "r" (-1));
+
+    signal (SIGILL, SIG_DFL);
+    return MM_ACCEL_PPC_ALTIVEC;
+}
+#endif /* ARCH_PPC */
+
+uint32_t mm_accel (void)
+{
+#if defined (ARCH_X86) || defined (ARCH_PPC)
+    static int got_accel = 0;
+    static uint32_t accel;
+
+    if (!got_accel) {
+	got_accel = 1;
+	accel = arch_accel ();
+    }
+
+    return accel;
+#else
+    return 0;
+#endif
+}
-- 
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