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author | Helge Deller <deller@gmx.de> | 2021-09-02 23:54:03 +0200 |
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committer | Helge Deller <deller@gmx.de> | 2021-09-02 23:54:03 +0200 |
commit | e5a2cac908df691f1637f9272d4c6dec83239611 (patch) | |
tree | c6b04a2a4ba4d35ca33972a665594807aed31777 /arch | |
parent | Merge tag 'platform-drivers-x86-v5.15-1' of git://git.kernel.org/pub/scm/linu... (diff) | |
download | linux-e5a2cac908df691f1637f9272d4c6dec83239611.tar.xz linux-e5a2cac908df691f1637f9272d4c6dec83239611.zip |
parisc: Drop __arch_swab16(), arch_swab24(), _arch_swab32() and __arch_swab64() functions
No need to keep those as inline assembly functions, the compiler now
generates the same or even better optimized code.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/parisc/include/uapi/asm/swab.h | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/arch/parisc/include/uapi/asm/swab.h b/arch/parisc/include/uapi/asm/swab.h deleted file mode 100644 index 35fb2d1bfbbd..000000000000 --- a/arch/parisc/include/uapi/asm/swab.h +++ /dev/null @@ -1,68 +0,0 @@ -/* 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 */ |