Viewing file:  compiler.h (2.49 KB) -rw-r--r--
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#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 0
#define __kernel_insbl(val, shift) \
(((unsigned long)(val) & 0xfful) << ((shift) * 8))
#define __kernel_inswl(val, shift) \
(((unsigned long)(val) & 0xfffful) << ((shift) * 8))
#define __kernel_insql(val, shift) \
((unsigned long)(val) << ((shift) * 8))
#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; })
#endif
#if 0 && (__GNUC__ > 2 || __GNUC_MINOR__ >= 92)
#define __kernel_extbl(val, shift) (((val) >> (((shift) & 7) * 8)) & 0xfful)
#define __kernel_extwl(val, shift) (((val) >> (((shift) & 7) * 8)) & 0xfffful)
#else
#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; })
#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
#endif /* __ALPHA_COMPILER_H */
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