[src/trunk]: src/sys/external/bsd/common/include/linux sign_extend64, GENMASK...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/29977642fa8e
branches:  trunk
changeset: 1027997:29977642fa8e
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sun Dec 19 01:33:59 2021 +0000

description:
sign_extend64, GENMASK_ULL, for_each_clear_bit

diffstat:

 sys/external/bsd/common/include/linux/bitops.h |  16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diffs (42 lines):

diff -r 4231fb48b9c9 -r 29977642fa8e sys/external/bsd/common/include/linux/bitops.h
--- a/sys/external/bsd/common/include/linux/bitops.h    Sun Dec 19 01:33:51 2021 +0000
+++ b/sys/external/bsd/common/include/linux/bitops.h    Sun Dec 19 01:33:59 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bitops.h,v 1.10 2021/12/19 01:04:12 riastradh Exp $    */
+/*     $NetBSD: bitops.h,v 1.11 2021/12/19 01:33:59 riastradh Exp $    */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -96,6 +96,12 @@
        return popcount64(n);
 }
 
+static inline int64_t
+sign_extend64(uint64_t x, unsigned n)
+{
+       return (int64_t)(x << (63 - n)) >> (63 - n);
+}
+
 /*
  * XXX Don't define BITS_PER_LONG as sizeof(unsigned long)*CHAR_BIT
  * because that won't work in preprocessor conditionals, where it often
@@ -110,7 +116,8 @@
 
 #define        BIT(n)          ((unsigned long)__BIT(n))
 #define        BIT_ULL(n)      ((unsigned long long)__BIT(n))
-#define        GENMASK(h,l)    __BITS(h,l)
+#define        GENMASK(h,l)    ((unsigned long)__BITS(h,l))
+#define        GENMASK_ULL(h,l)((unsigned long long)__BITS(h,l))
 
 static inline int
 test_bit(unsigned int n, const volatile unsigned long *p)
@@ -275,4 +282,9 @@
             (BIT) < (NBITS);                                                 \
             (BIT) = find_next_bit((PTR), (NBITS), (BIT) + 1))
 
+#define        for_each_clear_bit(BIT, PTR, NBITS)                                   \
+       for ((BIT) = find_first_zero_bit((PTR), (NBITS));                     \
+            (BIT) < (NBITS);                                                 \
+            (BIT) = find_next_zero_bit((PTR), (NBITS), (BIT) + 1))
+
 #endif  /* _LINUX_BITOPS_H_ */