Submitted By: Joe Ciccone <jciccone@linuxfromscratch.org>
Date: 2006-11-29
Initial Package Version: 2.6.19
Origin: Joe Ciccone
Upstream Status: Unknown
Description: Fixes a build issue with alpha on some processors. The
             instructions being modified are specific to ev56/ev6.

diff -Naur linux-2.6.19.orig/include/asm-alpha/compiler.h linux-2.6.19/include/asm-alpha/compiler.h
--- linux-2.6.19.orig/include/asm-alpha/compiler.h	2006-11-29 13:57:37.000000000 -0800
+++ linux-2.6.19/include/asm-alpha/compiler.h	2006-11-29 19:11:54.000000000 -0800
@@ -78,16 +78,16 @@
 #else
 #define __kernel_ldbu(mem)				\
   ({ unsigned char __kir;				\
-     __asm__("ldbu %0,%1" : "=r"(__kir) : "m"(mem));	\
+     __asm__(".arch ev6; ldbu %0,%1" : "=r"(__kir) : "m"(mem));	\
      __kir; })
 #define __kernel_ldwu(mem)				\
   ({ unsigned short __kir;				\
-     __asm__("ldwu %0,%1" : "=r"(__kir) : "m"(mem));	\
+     __asm__(".arch ev6; ldwu %0,%1" : "=r"(__kir) : "m"(mem));	\
      __kir; })
 #define __kernel_stb(val,mem) \
-  __asm__("stb %1,%0" : "=m"(mem) : "r"(val))
+  __asm__(".arch ev6; stb %1,%0" : "=m"(mem) : "r"(val))
 #define __kernel_stw(val,mem) \
-  __asm__("stw %1,%0" : "=m"(mem) : "r"(val))
+  __asm__(".arch ev6; stw %1,%0" : "=m"(mem) : "r"(val))
 #endif
 
 #ifdef __KERNEL__
diff -Naur linux-2.6.19.orig/include/asm-alpha/compiler.h.orig linux-2.6.19/include/asm-alpha/compiler.h.orig
--- linux-2.6.19.orig/include/asm-alpha/compiler.h.orig	1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.19/include/asm-alpha/compiler.h.orig	2006-11-29 13:57:37.000000000 -0800
@@ -0,0 +1,107 @@
+#ifndef __ALPHA_COMPILER_H
+#define __ALPHA_COMPILER_H
+
+/* 
+ * Herein are macros we use when describing various patterns we want to GCC.
+ * In all cases we can get better schedules out of the compiler if we hide
+ * as little as possible inside inline assembly.  However, we want to be
+ * able to know what we'll get out before giving up inline assembly.  Thus
+ * these tests and macros.
+ */
+
+#if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3
+# define __kernel_insbl(val, shift)	__builtin_alpha_insbl(val, shift)
+# define __kernel_inswl(val, shift)	__builtin_alpha_inswl(val, shift)
+# define __kernel_insql(val, shift)	__builtin_alpha_insql(val, shift)
+# define __kernel_inslh(val, shift)	__builtin_alpha_inslh(val, shift)
+# define __kernel_extbl(val, shift)	__builtin_alpha_extbl(val, shift)
+# define __kernel_extwl(val, shift)	__builtin_alpha_extwl(val, shift)
+# define __kernel_cmpbge(a, b)		__builtin_alpha_cmpbge(a, b)
+# define __kernel_cttz(x)		__builtin_ctzl(x)
+# define __kernel_ctlz(x)		__builtin_clzl(x)
+# define __kernel_ctpop(x)		__builtin_popcountl(x)
+#else
+# define __kernel_insbl(val, shift)					\
+  ({ unsigned long __kir;						\
+     __asm__("insbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
+     __kir; })
+# define __kernel_inswl(val, shift)					\
+  ({ unsigned long __kir;						\
+     __asm__("inswl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
+     __kir; })
+# define __kernel_insql(val, shift)					\
+  ({ unsigned long __kir;						\
+     __asm__("insql %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
+     __kir; })
+# define __kernel_inslh(val, shift)					\
+  ({ unsigned long __kir;						\
+     __asm__("inslh %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
+     __kir; })
+# define __kernel_extbl(val, shift)					\
+  ({ unsigned long __kir;						\
+     __asm__("extbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
+     __kir; })
+# define __kernel_extwl(val, shift)					\
+  ({ unsigned long __kir;						\
+     __asm__("extwl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
+     __kir; })
+# define __kernel_cmpbge(a, b)						\
+  ({ unsigned long __kir;						\
+     __asm__("cmpbge %r2,%1,%0" : "=r"(__kir) : "rI"(b), "rJ"(a));	\
+     __kir; })
+# define __kernel_cttz(x)						\
+  ({ unsigned long __kir;						\
+     __asm__("cttz %1,%0" : "=r"(__kir) : "r"(x));			\
+     __kir; })
+# define __kernel_ctlz(x)						\
+  ({ unsigned long __kir;						\
+     __asm__("ctlz %1,%0" : "=r"(__kir) : "r"(x));			\
+     __kir; })
+# define __kernel_ctpop(x)						\
+  ({ unsigned long __kir;						\
+     __asm__("ctpop %1,%0" : "=r"(__kir) : "r"(x));			\
+     __kir; })
+#endif
+
+
+/* 
+ * Beginning with EGCS 1.1, GCC defines __alpha_bwx__ when the BWX 
+ * extension is enabled.  Previous versions did not define anything
+ * we could test during compilation -- too bad, so sad.
+ */
+
+#if defined(__alpha_bwx__)
+#define __kernel_ldbu(mem)	(mem)
+#define __kernel_ldwu(mem)	(mem)
+#define __kernel_stb(val,mem)	((mem) = (val))
+#define __kernel_stw(val,mem)	((mem) = (val))
+#else
+#define __kernel_ldbu(mem)				\
+  ({ unsigned char __kir;				\
+     __asm__("ldbu %0,%1" : "=r"(__kir) : "m"(mem));	\
+     __kir; })
+#define __kernel_ldwu(mem)				\
+  ({ unsigned short __kir;				\
+     __asm__("ldwu %0,%1" : "=r"(__kir) : "m"(mem));	\
+     __kir; })
+#define __kernel_stb(val,mem) \
+  __asm__("stb %1,%0" : "=m"(mem) : "r"(val))
+#define __kernel_stw(val,mem) \
+  __asm__("stw %1,%0" : "=m"(mem) : "r"(val))
+#endif
+
+#ifdef __KERNEL__
+/* Some idiots over in <linux/compiler.h> thought inline should imply
+   always_inline.  This breaks stuff.  We'll include this file whenever
+   we run into such problems.  */
+
+#include <linux/compiler.h>
+#undef inline
+#undef __inline__
+#undef __inline
+#undef __always_inline
+#define __always_inline		inline __attribute__((always_inline))
+
+#endif /* __KERNEL__ */
+
+#endif /* __ALPHA_COMPILER_H */