From b19f4636d92ba0ab44eef7f7a1d47b11c58ace60 Mon Sep 17 00:00:00 2001
From: Mattias Wadman <mattias.wadman@gmail.com>
Date: Thu, 12 Nov 2009 22:09:52 +0000
Subject: [PATCH] Make it compile on PPC Added generic ffdesca code Added
 atomic ops for ppc

---
 Makefile                       |  2 ++
 configure                      |  7 ++++-
 src/atomic.h                   | 20 ++++++++++++-
 src/ffdecsa/parallel_032_int.h | 55 ++++++++++++++++++++++++++++++++++
 src/ffdecsa/parallel_std_def.h | 29 ++++++++++++++++++
 5 files changed, 111 insertions(+), 2 deletions(-)
 create mode 100644 src/ffdecsa/parallel_032_int.h
 create mode 100644 src/ffdecsa/parallel_std_def.h

diff --git a/Makefile b/Makefile
index 83aea39a..3f92cf4c 100644
--- a/Makefile
+++ b/Makefile
@@ -92,7 +92,9 @@ SRCS += src/cwc.c \
 	src/krypt.c \
 	src/ffdecsa/FFdecsa.c
 
+ifneq ($(ARCH), ppc)
 ${BUILDDIR}/src/ffdecsa/FFdecsa.o : CFLAGS = -mmmx
+endif
 LDFLAGS += -lcrypt
 
 #
diff --git a/configure b/configure
index ab6222c0..c66e2f70 100755
--- a/configure
+++ b/configure
@@ -19,7 +19,11 @@ CPU=generic
 ARCH=`uname -m`
 OSENV="posix"
 PREFIX=/usr/local
-PARALLEL_MODE=PARALLEL_64_MMX
+if [ "$ARCH" = "ppc" ] ; then
+  PARALLEL_MODE=PARALLEL_32_INT
+else
+  PARALLEL_MODE=PARALLEL_64_MMX
+fi
 
 show_help(){
   echo "Usage: configure [options]"
@@ -151,6 +155,7 @@ fi
 # Finalize
 #
 cat >> ${CONFIG_MAK} << EOF 
+ARCH=$ARCH
 INSTALLPREFIX=$PREFIX
 LDFLAGS_cfg += -lpthread
 EOF
diff --git a/src/atomic.h b/src/atomic.h
index 9492a68f..ce414999 100644
--- a/src/atomic.h
+++ b/src/atomic.h
@@ -31,6 +31,24 @@ atomic_add(volatile int *ptr, int incr)
 	       "=r"(r), "=m"(*ptr) : "0" (incr), "m" (*ptr) : "memory");
   return r;
 }
-#endif
+#elif defined(__ppc__) || defined(__PPC__)
+
+/* somewhat based on code from darwin gcc  */
+static inline int
+atomic_add (volatile int *ptr, int incr)
+{
+  int tmp, res;
+  asm volatile("0:\n"
+               "lwarx  %1,0,%2\n"
+               "add%I3 %0,%1,%3\n"
+               "stwcx. %0,0,%2\n"
+               "bne-   0b\n"
+               : "=&r"(tmp), "=&b"(res)
+               : "r" (ptr), "Ir"(incr)
+               : "cr0", "memory");
+  
+  return res;
+}
+#endif 
 
 #endif /* HTSATOMIC_H__ */
diff --git a/src/ffdecsa/parallel_032_int.h b/src/ffdecsa/parallel_032_int.h
new file mode 100644
index 00000000..a21fe31b
--- /dev/null
+++ b/src/ffdecsa/parallel_032_int.h
@@ -0,0 +1,55 @@
+/* FFdecsa -- fast decsa algorithm
+ *
+ * Copyright (C) 2003-2004  fatih89r
+ *
+ * This program 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.
+ *
+ * This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "parallel_std_def.h"
+
+typedef unsigned int group;
+#define GROUP_PARALLELISM 32
+#define FF0()      0x0
+#define FF1()      0xffffffff
+
+/* 64 rows of 32 bits */
+
+void static inline FFTABLEIN(unsigned char *tab, int g, unsigned char *data){
+  *(((int *)tab)+g)=*((int *)data);
+  *(((int *)tab)+32+g)=*(((int *)data)+1);
+}
+
+void static inline FFTABLEOUT(unsigned char *data, unsigned char *tab, int g){
+  *((int *)data)=*(((int *)tab)+g);
+  *(((int *)data)+1)=*(((int *)tab)+32+g);
+}
+
+void static inline FFTABLEOUTXORNBY(int n, unsigned char *data, unsigned char *tab, int g){
+  int j;
+  for(j=0;j<n;j++){
+    *(data+j)^=*(tab+4*(g+(j>=4?32-1:0))+j);
+  }
+}
+
+typedef unsigned int batch;
+#define BYTES_PER_BATCH 4
+#define B_FFN_ALL_29() 0x29292929
+#define B_FFN_ALL_02() 0x02020202
+#define B_FFN_ALL_04() 0x04040404
+#define B_FFN_ALL_10() 0x10101010
+#define B_FFN_ALL_40() 0x40404040
+#define B_FFN_ALL_80() 0x80808080
+
+#define M_EMPTY()
diff --git a/src/ffdecsa/parallel_std_def.h b/src/ffdecsa/parallel_std_def.h
new file mode 100644
index 00000000..10517d48
--- /dev/null
+++ b/src/ffdecsa/parallel_std_def.h
@@ -0,0 +1,29 @@
+/* FFdecsa -- fast decsa algorithm
+ *
+ * Copyright (C) 2003-2004  fatih89r
+ *
+ * This program 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.
+ *
+ * This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define FFXOR(a,b) ((a)^(b))
+#define FFAND(a,b) ((a)&(b))
+#define FFOR(a,b)  ((a)|(b))
+#define FFNOT(a)   (~(a))
+
+#define B_FFAND(a,b) ((a)&(b))
+#define B_FFOR(a,b)  ((a)|(b))
+#define B_FFXOR(a,b) ((a)^(b))
+#define B_FFSH8L(a,n) ((a)<<(n))
+#define B_FFSH8R(a,n) ((a)>>(n))