Messages in this thread Patch in this message | | | Date | Thu, 6 May 2004 11:48:50 -0700 | From | Paul Jackson <> | Subject | [PATCH mask 9/15] mask3-unline-find-next-bit-ia64 |
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mask3-unline-find-next-bit-ia64 Move the page of code (~700 bytes of instructions) for find_next_bit and find_next_zero_bit from inline in include/asm-ia64/bitops.h to a real function in arch/ia64/lib/bitops.c, leaving a declaration and macro wrapper behind.
The other arch's with almost this same code might want to also uninline it: alpha, parisc, ppc, sh, sparc, sparc64.
These are too big to inline.
Index: 2.6.6-rc3-mm1-bitmapv5/include/asm-ia64/bitops.h =================================================================== --- 2.6.6-rc3-mm1-bitmapv5.orig/include/asm-ia64/bitops.h 2004-05-05 01:46:43.000000000 -0700 +++ 2.6.6-rc3-mm1-bitmapv5/include/asm-ia64/bitops.h 2004-05-05 02:45:50.000000000 -0700 @@ -11,7 +11,7 @@ #include <linux/compiler.h> #include <linux/types.h> - +#include <asm/bitops.h> #include <asm/intrinsics.h> /** @@ -359,93 +359,21 @@ #endif /* __KERNEL__ */ -/* - * Find next zero bit in a bitmap reasonably efficiently.. - */ -static inline int -find_next_zero_bit (void *addr, unsigned long size, unsigned long offset) -{ - unsigned long *p = ((unsigned long *) addr) + (offset >> 6); - unsigned long result = offset & ~63UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 63UL; - if (offset) { - tmp = *(p++); - tmp |= ~0UL >> (64-offset); - if (size < 64) - goto found_first; - if (~tmp) - goto found_middle; - size -= 64; - result += 64; - } - while (size & ~63UL) { - if (~(tmp = *(p++))) - goto found_middle; - result += 64; - size -= 64; - } - if (!size) - return result; - tmp = *p; -found_first: - tmp |= ~0UL << size; - if (tmp == ~0UL) /* any bits zero? */ - return result + size; /* nope */ -found_middle: - return result + ffz(tmp); -} +extern int __find_next_zero_bit (void *addr, unsigned long size, \ + unsigned long offset); +extern int __find_next_bit(const void *addr, unsigned long size, \ + unsigned long offset); + +#define find_next_zero_bit(addr, size, offset) \ + __find_next_zero_bit((addr), (size), (offset)) +#define find_next_bit(addr, size, offset) \ + __find_next_bit((addr), (size), (offset)) /* * The optimizer actually does good code for this case.. */ #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0) -/* - * Find next bit in a bitmap reasonably efficiently.. - */ -static inline int -find_next_bit(const void *addr, unsigned long size, unsigned long offset) -{ - unsigned long *p = ((unsigned long *) addr) + (offset >> 6); - unsigned long result = offset & ~63UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 63UL; - if (offset) { - tmp = *(p++); - tmp &= ~0UL << offset; - if (size < 64) - goto found_first; - if (tmp) - goto found_middle; - size -= 64; - result += 64; - } - while (size & ~63UL) { - if ((tmp = *(p++))) - goto found_middle; - result += 64; - size -= 64; - } - if (!size) - return result; - tmp = *p; - found_first: - tmp &= ~0UL >> (64-size); - if (tmp == 0UL) /* Are any bits set? */ - return result + size; /* Nope. */ - found_middle: - return result + __ffs(tmp); -} - #define find_first_bit(addr, size) find_next_bit((addr), (size), 0) #ifdef __KERNEL__ Index: 2.6.6-rc3-mm1-bitmapv5/arch/ia64/lib/bitop.c =================================================================== --- 2.6.6-rc3-mm1-bitmapv5.orig/arch/ia64/lib/bitop.c 2004-05-05 02:45:38.000000000 -0700 +++ 2.6.6-rc3-mm1-bitmapv5/arch/ia64/lib/bitop.c 2004-05-05 02:45:50.000000000 -0700 @@ -0,0 +1,88 @@ +#include <linux/compiler.h> +#include <linux/types.h> +#include <asm/intrinsics.h> +#include <linux/module.h> +#include <asm/bitops.h> + +/* + * Find next zero bit in a bitmap reasonably efficiently.. + */ + +int __find_next_zero_bit (void *addr, unsigned long size, unsigned long offset) +{ + unsigned long *p = ((unsigned long *) addr) + (offset >> 6); + unsigned long result = offset & ~63UL; + unsigned long tmp; + + if (offset >= size) + return size; + size -= result; + offset &= 63UL; + if (offset) { + tmp = *(p++); + tmp |= ~0UL >> (64-offset); + if (size < 64) + goto found_first; + if (~tmp) + goto found_middle; + size -= 64; + result += 64; + } + while (size & ~63UL) { + if (~(tmp = *(p++))) + goto found_middle; + result += 64; + size -= 64; + } + if (!size) + return result; + tmp = *p; +found_first: + tmp |= ~0UL << size; + if (tmp == ~0UL) /* any bits zero? */ + return result + size; /* nope */ +found_middle: + return result + ffz(tmp); +} +EXPORT_SYMBOL(__find_next_zero_bit); + +/* + * Find next bit in a bitmap reasonably efficiently.. + */ +int __find_next_bit(const void *addr, unsigned long size, unsigned long offset) +{ + unsigned long *p = ((unsigned long *) addr) + (offset >> 6); + unsigned long result = offset & ~63UL; + unsigned long tmp; + + if (offset >= size) + return size; + size -= result; + offset &= 63UL; + if (offset) { + tmp = *(p++); + tmp &= ~0UL << offset; + if (size < 64) + goto found_first; + if (tmp) + goto found_middle; + size -= 64; + result += 64; + } + while (size & ~63UL) { + if ((tmp = *(p++))) + goto found_middle; + result += 64; + size -= 64; + } + if (!size) + return result; + tmp = *p; + found_first: + tmp &= ~0UL >> (64-size); + if (tmp == 0UL) /* Are any bits set? */ + return result + size; /* Nope. */ + found_middle: + return result + __ffs(tmp); +} +EXPORT_SYMBOL(__find_next_bit); Index: 2.6.6-rc3-mm1-bitmapv5/arch/ia64/lib/Makefile =================================================================== --- 2.6.6-rc3-mm1-bitmapv5.orig/arch/ia64/lib/Makefile 2004-05-05 01:45:17.000000000 -0700 +++ 2.6.6-rc3-mm1-bitmapv5/arch/ia64/lib/Makefile 2004-05-05 02:45:50.000000000 -0700 @@ -6,7 +6,7 @@ lib-y := __divsi3.o __udivsi3.o __modsi3.o __umodsi3.o \ __divdi3.o __udivdi3.o __moddi3.o __umoddi3.o \ - checksum.o clear_page.o csum_partial_copy.o copy_page.o \ + bitop.o checksum.o clear_page.o csum_partial_copy.o copy_page.o \ clear_user.o strncpy_from_user.o strlen_user.o strnlen_user.o \ flush.o ip_fast_csum.o do_csum.o \ memset.o strlen.o swiotlb.o
-- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson <pj@sgi.com> 1.650.933.1373 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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