diff options
Diffstat (limited to 'lib/libc/string')
| -rw-r--r-- | lib/libc/string/ffs.c | 12 | ||||
| -rw-r--r-- | lib/libc/string/ffsl.c | 12 | ||||
| -rw-r--r-- | lib/libc/string/ffsll.c | 12 | ||||
| -rw-r--r-- | lib/libc/string/fls.c | 13 | ||||
| -rw-r--r-- | lib/libc/string/flsl.c | 14 | ||||
| -rw-r--r-- | lib/libc/string/flsll.c | 13 |
6 files changed, 34 insertions, 42 deletions
diff --git a/lib/libc/string/ffs.c b/lib/libc/string/ffs.c index 738ef90ce091..34140e3e4d85 100644 --- a/lib/libc/string/ffs.c +++ b/lib/libc/string/ffs.c @@ -3,6 +3,10 @@ * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. + * Copyright (c) 2023 The FreeBSD Foundation + * + * Portions of this software were developed by Robert Clausecker + * <fuz@FreeBSD.org> under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -43,11 +47,5 @@ __FBSDID("$FreeBSD$"); int ffs(int mask) { - int bit; - - if (mask == 0) - return(0); - for (bit = 1; !(mask & 1); bit++) - mask = (unsigned int)mask >> 1; - return (bit); + return (mask == 0 ? 0 : __builtin_ctz(mask) + 1); } diff --git a/lib/libc/string/ffsl.c b/lib/libc/string/ffsl.c index dbd894b9655b..701e23cdf8f4 100644 --- a/lib/libc/string/ffsl.c +++ b/lib/libc/string/ffsl.c @@ -3,6 +3,10 @@ * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. + * Copyright (c) 2023 The FreeBSD Foundation + * + * Portions of this software were developed by Robert Clausecker + * <fuz@FreeBSD.org> under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -40,11 +44,5 @@ __FBSDID("$FreeBSD$"); int ffsl(long mask) { - int bit; - - if (mask == 0) - return (0); - for (bit = 1; !(mask & 1); bit++) - mask = (unsigned long)mask >> 1; - return (bit); + return (mask == 0 ? 0 : __builtin_ctzl(mask) + 1); } diff --git a/lib/libc/string/ffsll.c b/lib/libc/string/ffsll.c index 91886de2f127..e94fb518eb03 100644 --- a/lib/libc/string/ffsll.c +++ b/lib/libc/string/ffsll.c @@ -3,6 +3,10 @@ * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. + * Copyright (c) 2023 The FreeBSD Foundation + * + * Portions of this software were developed by Robert Clausecker + * <fuz@FreeBSD.org> under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -40,11 +44,5 @@ __FBSDID("$FreeBSD$"); int ffsll(long long mask) { - int bit; - - if (mask == 0) - return (0); - for (bit = 1; !(mask & 1); bit++) - mask = (unsigned long long)mask >> 1; - return (bit); + return (mask == 0 ? 0 : __builtin_ctzll(mask) + 1); } diff --git a/lib/libc/string/fls.c b/lib/libc/string/fls.c index d9edc41f9599..3c4719776778 100644 --- a/lib/libc/string/fls.c +++ b/lib/libc/string/fls.c @@ -3,6 +3,10 @@ * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. + * Copyright (c) 2023 The FreeBSD Foundation + * + * Portions of this software were developed by Robert Clausecker + * <fuz@FreeBSD.org> under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -32,6 +36,7 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include <limits.h> #include <strings.h> /* @@ -40,11 +45,5 @@ __FBSDID("$FreeBSD$"); int fls(int mask) { - int bit; - - if (mask == 0) - return (0); - for (bit = 1; mask != 1; bit++) - mask = (unsigned int)mask >> 1; - return (bit); + return (mask == 0 ? 0 : CHAR_BIT * sizeof(mask) - __builtin_clz(mask)); } diff --git a/lib/libc/string/flsl.c b/lib/libc/string/flsl.c index 60370cf7d832..f5280b77a4e2 100644 --- a/lib/libc/string/flsl.c +++ b/lib/libc/string/flsl.c @@ -3,6 +3,11 @@ * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. + * Copyright (c) 2023 The FreeBSD Foundation + + * + * Portions of this software were developed by Robert Clausecker + * <fuz@FreeBSD.org> under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -32,6 +37,7 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include <limits.h> #include <strings.h> /* @@ -40,11 +46,5 @@ __FBSDID("$FreeBSD$"); int flsl(long mask) { - int bit; - - if (mask == 0) - return (0); - for (bit = 1; mask != 1; bit++) - mask = (unsigned long)mask >> 1; - return (bit); + return (mask == 0 ? 0 : CHAR_BIT * sizeof(mask) - __builtin_clzl(mask)); } diff --git a/lib/libc/string/flsll.c b/lib/libc/string/flsll.c index 275aaa0e2e15..ab504b8e592f 100644 --- a/lib/libc/string/flsll.c +++ b/lib/libc/string/flsll.c @@ -3,6 +3,10 @@ * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. + * Copyright (c) 2023 The FreeBSD Foundation + * + * Portions of this software were developed by Robert Clausecker + * <fuz@FreeBSD.org> under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -32,6 +36,7 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include <limits.h> #include <strings.h> /* @@ -40,11 +45,5 @@ __FBSDID("$FreeBSD$"); int flsll(long long mask) { - int bit; - - if (mask == 0) - return (0); - for (bit = 1; mask != 1; bit++) - mask = (unsigned long long)mask >> 1; - return (bit); + return (mask == 0 ? 0 : CHAR_BIT * sizeof(mask) - __builtin_clzll(mask)); } |