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1275 |
phoenix |
#ifndef __ALPHA_COMPILER_H
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#define __ALPHA_COMPILER_H
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/*
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* Herein are macros we use when describing various patterns we want to GCC.
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* In all cases we can get better schedules out of the compiler if we hide
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* as little as possible inside inline assembly. However, we want to be
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* able to know what we'll get out before giving up inline assembly. Thus
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* these tests and macros.
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*/
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#if 0
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#define __kernel_insbl(val, shift) \
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(((unsigned long)(val) & 0xfful) << ((shift) * 8))
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#define __kernel_inswl(val, shift) \
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(((unsigned long)(val) & 0xfffful) << ((shift) * 8))
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#define __kernel_insql(val, shift) \
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((unsigned long)(val) << ((shift) * 8))
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#else
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#define __kernel_insbl(val, shift) \
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({ unsigned long __kir; \
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__asm__("insbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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#define __kernel_inswl(val, shift) \
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({ unsigned long __kir; \
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__asm__("inswl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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#define __kernel_insql(val, shift) \
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({ unsigned long __kir; \
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__asm__("insql %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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#endif
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#if 0 && (__GNUC__ > 2 || __GNUC_MINOR__ >= 92)
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#define __kernel_extbl(val, shift) (((val) >> (((shift) & 7) * 8)) & 0xfful)
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#define __kernel_extwl(val, shift) (((val) >> (((shift) & 7) * 8)) & 0xfffful)
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#else
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#define __kernel_extbl(val, shift) \
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({ unsigned long __kir; \
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__asm__("extbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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#define __kernel_extwl(val, shift) \
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({ unsigned long __kir; \
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__asm__("extwl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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#endif
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/*
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* Beginning with EGCS 1.1, GCC defines __alpha_bwx__ when the BWX
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* extension is enabled. Previous versions did not define anything
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* we could test during compilation -- too bad, so sad.
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*/
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#if defined(__alpha_bwx__)
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#define __kernel_ldbu(mem) (mem)
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#define __kernel_ldwu(mem) (mem)
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#define __kernel_stb(val,mem) ((mem) = (val))
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#define __kernel_stw(val,mem) ((mem) = (val))
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#else
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#define __kernel_ldbu(mem) \
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({ unsigned char __kir; \
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__asm__("ldbu %0,%1" : "=r"(__kir) : "m"(mem)); \
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__kir; })
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#define __kernel_ldwu(mem) \
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({ unsigned short __kir; \
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__asm__("ldwu %0,%1" : "=r"(__kir) : "m"(mem)); \
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__kir; })
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#define __kernel_stb(val,mem) \
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__asm__("stb %1,%0" : "=m"(mem) : "r"(val))
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#define __kernel_stw(val,mem) \
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__asm__("stw %1,%0" : "=m"(mem) : "r"(val))
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#endif
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#endif /* __ALPHA_COMPILER_H */
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