/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _PARISC_SWAB_H #define _PARISC_SWAB_H #include <asm/bitsperlong.h> #include <linux/types.h> #include <linux/compiler.h> #define __SWAB_64_THRU_32__ static inline __attribute_const__ __u16 __arch_swab16(__u16 x) { __asm__("dep %0, 15, 8, %0\n\t" /* deposit 00ab -> 0bab */ "shd %%r0, %0, 8, %0" /* shift 000000ab -> 00ba */ : "=r" (x) : "0" (x)); return x; } #define __arch_swab16 __arch_swab16 static inline __attribute_const__ __u32 __arch_swab24(__u32 x) { __asm__("shd %0, %0, 8, %0\n\t" /* shift xabcxabc -> cxab */ "dep %0, 15, 8, %0\n\t" /* deposit cxab -> cbab */ "shd %%r0, %0, 8, %0" /* shift 0000cbab -> 0cba */ : "=r" (x) : "0" (x)); return x; } static inline __attribute_const__ __u32 __arch_swab32(__u32 x) { unsigned int temp; __asm__("shd %0, %0, 16, %1\n\t" /* shift abcdabcd -> cdab */ "dep %1, 15, 8, %1\n\t" /* deposit cdab -> cbab */ "shd %0, %1, 8, %0" /* shift abcdcbab -> dcba */ : "=r" (x), "=&r" (temp) : "0" (x)); return x; } #define __arch_swab32 __arch_swab32 #if __BITS_PER_LONG > 32 /* ** From "PA-RISC 2.0 Architecture", HP Professional Books. ** See Appendix I page 8 , "Endian Byte Swapping". ** ** Pretty cool algorithm: (* == zero'd bits) ** PERMH 01234567 -> 67452301 into %0 ** HSHL 67452301 -> 7*5*3*1* into %1 ** HSHR 67452301 -> *6*4*2*0 into %0 ** OR %0 | %1 -> 76543210 into %0 (all done!) */ static inline __attribute_const__ __u64 __arch_swab64(__u64 x) { __u64 temp; __asm__("permh,3210 %0, %0\n\t" "hshl %0, 8, %1\n\t" "hshr,u %0, 8, %0\n\t" "or %1, %0, %0" : "=r" (x), "=&r" (temp) : "0" (x)); return x; } #define __arch_swab64 __arch_swab64 #endif /* __BITS_PER_LONG > 32 */ #endif /* _PARISC_SWAB_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 212 B | 0644 |
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bitsperlong.h | File | 302 B | 0644 |
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byteorder.h | File | 194 B | 0644 |
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errno.h | File | 5.7 KB | 0644 |
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fcntl.h | File | 1.21 KB | 0644 |
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ioctl.h | File | 1.67 KB | 0644 |
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ioctls.h | File | 3.58 KB | 0644 |
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ipcbuf.h | File | 837 B | 0644 |
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mman.h | File | 3.34 KB | 0644 |
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msgbuf.h | File | 1.16 KB | 0644 |
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pdc.h | File | 21.97 KB | 0644 |
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posix_types.h | File | 726 B | 0644 |
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ptrace.h | File | 2.75 KB | 0644 |
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sembuf.h | File | 857 B | 0644 |
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setup.h | File | 173 B | 0644 |
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shmbuf.h | File | 1.38 KB | 0644 |
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sigcontext.h | File | 557 B | 0644 |
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siginfo.h | File | 239 B | 0644 |
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signal.h | File | 2.87 KB | 0644 |
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socket.h | File | 2.42 KB | 0644 |
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sockios.h | File | 410 B | 0644 |
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stat.h | File | 1.76 KB | 0644 |
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statfs.h | File | 181 B | 0644 |
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swab.h | File | 1.77 KB | 0644 |
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termbits.h | File | 4.67 KB | 0644 |
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termios.h | File | 1.08 KB | 0644 |
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types.h | File | 154 B | 0644 |
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unistd.h | File | 17.79 KB | 0644 |
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