diff options
Diffstat (limited to 'arch/alpha/include/asm/compiler.h')
| -rw-r--r-- | arch/alpha/include/asm/compiler.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/compiler.h b/arch/alpha/include/asm/compiler.h new file mode 100644 index 000000000000..da6bb199839c --- /dev/null +++ b/arch/alpha/include/asm/compiler.h @@ -0,0 +1,130 @@ +#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) +#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; }) +#endif + +#ifdef __alpha_cix__ +# if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3 +# define __kernel_cttz(x) __builtin_ctzl(x) +# define __kernel_ctlz(x) __builtin_clzl(x) +# define __kernel_ctpop(x) __builtin_popcountl(x) +# else +# 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 +#else +# define __kernel_cttz(x) \ + ({ unsigned long __kir; \ + __asm__(".arch ev67; cttz %1,%0" : "=r"(__kir) : "r"(x)); \ + __kir; }) +# define __kernel_ctlz(x) \ + ({ unsigned long __kir; \ + __asm__(".arch ev67; ctlz %1,%0" : "=r"(__kir) : "r"(x)); \ + __kir; }) +# define __kernel_ctpop(x) \ + ({ unsigned long __kir; \ + __asm__(".arch ev67; 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__(".arch ev56; \ + ldbu %0,%1" : "=r"(__kir) : "m"(mem)); \ + __kir; }) +#define __kernel_ldwu(mem) \ + ({ unsigned short __kir; \ + __asm__(".arch ev56; \ + ldwu %0,%1" : "=r"(__kir) : "m"(mem)); \ + __kir; }) +#define __kernel_stb(val,mem) \ + __asm__(".arch ev56; \ + stb %1,%0" : "=m"(mem) : "r"(val)) +#define __kernel_stw(val,mem) \ + __asm__(".arch ev56; \ + 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 */ |