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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [include/] [asm-alpha/] [compiler.h] - Rev 1780
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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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