More work towards a powerPC port, and towards generic portability.

Original commit message from CVS:
More work towards a powerPC port, and towards generic portability.

gst/Makefile.am

@@ -12,7 +12,7 @@ if HAVE_CPU_I386
 GSTARCH_SRCS = gstcpuid_i386.s
 else
 if HAVE_CPU_PPC
-GSTARCH_SRCS = gstppc.c
+GSTARCH_SRCS = 
 else
 GSTARCH_SRCS = 
 endif
@@ -55,6 +55,9 @@ libgstinclude_HEADERS =	\
 	gstbufferpool.h	\
 	gstclock.h	\
 	gstcpu.h	\
+	gstarch.h       \
+	gsti386.h       \
+	gstppc.h        \
 	gstelement.h	\
 	gstbin.h	\
 	gstpipeline.h	\

gst/gstarch.h

@@ -9,7 +9,7 @@
 #ifdef HAVE_CPU_PPC
 #include "gstppc.h"
 #else
-#warn Need to know about this architecture, or have a generic implementation
+#error Need to know about this architecture, or have a generic implementation
 #endif
 #endif
 

gst/gstcpu.c

@@ -28,7 +28,7 @@ void gst_cpuid_i386(int,long *,long *,long *,long *);
 #define gst_cpuid gst_cpuid_i386
 
 #else
-#define gst_cpuid(o,a,b,c,d)
+#define gst_cpuid(o,a,b,c,d) (void)(a);(void)(b);(void)(c);
 #endif
 
 void _gst_cpu_initialize(void) 

gst/gstppc.h

@@ -1,18 +1,13 @@
 #ifndef GST_HGUARD_GSTPPC_H
 #define GST_HGUARD_GSTPPC_H
 
-/* Hmm - does this work, or do the braces cause other stack manipulation?
- * XXX
+/* FIXME: Hmm - does this work?
  */
-#define GET_SP(target) { \
-	register unsigned long r1 __asm__("r1"); \
-	target = r1; \
-}
+#define GET_SP(target) \
+	__asm__("stw 1,%0" : "=m"(target) : : "r1");
 
-#define SET_SP(source) { \
-	register unsigned long r1 __asm__("r1"); \
-	r1 = source; \
-}
+#define SET_SP(source) \
+	__asm__("lwz 1,%0" : "=m"(source))
 
 #define JUMP(target) \
     __asm__("b " SYMBOL_NAME_STR(cothread_stub))

libs/getbits/Makefile.am

@@ -5,14 +5,11 @@ filter_LTLIBRARIES = libgstgetbits.la
 if HAVE_CPU_I386
 GSTARCH_SRCS = gstgetbits_i386.s
 else
-if HAVE_CPU_PPC
 GSTARCH_SRCS = gstgetbits_generic.c
-else
-GSTARCH_SRCS =
-endif
 endif
 
 libgstgetbits_la_SOURCES = gstgetbits.c gstgetbits_inl.h $(GSTARCH_SRCS)
+EXTRA_libgstgetbits_la_SOURCES = gstgetbits_i386.s gstgetbits_generic.c
 
 libgstgetbitsincludedir = $(includedir)/gst/libs/gstgetbits
 libgstgetbitsinclude_HEADERS = gstgetbits.h

libs/getbits/gstgetbits_generic.c

@@ -0,0 +1,2 @@
+
+#error Need an implementation of the functions in gstgetbits_i386.s