diff options
Diffstat (limited to 'arch/alpha/include/asm/swab.h')
| -rw-r--r-- | arch/alpha/include/asm/swab.h | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/arch/alpha/include/asm/swab.h b/arch/alpha/include/asm/swab.h deleted file mode 100644 index 4d682b16c7c..00000000000 --- a/arch/alpha/include/asm/swab.h +++ /dev/null @@ -1,42 +0,0 @@ -#ifndef _ALPHA_SWAB_H -#define _ALPHA_SWAB_H - -#include <linux/types.h> -#include <linux/compiler.h> -#include <asm/compiler.h> - -#ifdef __GNUC__ - -static inline __attribute_const__ __u32 __arch_swab32(__u32 x) -{ - /* - * Unfortunately, we can't use the 6 instruction sequence - * on ev6 since the latency of the UNPKBW is 3, which is - * pretty hard to hide. Just in case a future implementation - * has a lower latency, here's the sequence (also by Mike Burrows) - * - * UNPKBW a0, v0 v0: 00AA00BB00CC00DD - * SLL v0, 24, a0 a0: BB00CC00DD000000 - * BIS v0, a0, a0 a0: BBAACCBBDDCC00DD - * EXTWL a0, 6, v0 v0: 000000000000BBAA - * ZAP a0, 0xf3, a0 a0: 00000000DDCC0000 - * ADDL a0, v0, v0 v0: ssssssssDDCCBBAA - */ - - __u64 t0, t1, t2, t3; - - t0 = __kernel_inslh(x, 7); /* t0 : 0000000000AABBCC */ - t1 = __kernel_inswl(x, 3); /* t1 : 000000CCDD000000 */ - t1 |= t0; /* t1 : 000000CCDDAABBCC */ - t2 = t1 >> 16; /* t2 : 0000000000CCDDAA */ - t0 = t1 & 0xFF00FF00; /* t0 : 00000000DD00BB00 */ - t3 = t2 & 0x00FF00FF; /* t3 : 0000000000CC00AA */ - t1 = t0 + t3; /* t1 : ssssssssDDCCBBAA */ - - return t1; -} -#define __arch_swab32 __arch_swab32 - -#endif /* __GNUC__ */ - -#endif /* _ALPHA_SWAB_H */ |