source: patches/linux-2.6.19-alpha_io_fix-1.patch@ c47e2c5

include/asm-alpha/compiler.h

@@ -78 +78 @@
 #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__

include/asm-alpha/compiler.h.orig

@@ +1 @@
+#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 */