From 299ec26e55102db7304d65e579f6031fb36b038b Mon Sep 17 00:00:00 2001 From: Dongliang Mu Date: Mon, 29 Aug 2016 18:52:05 -0400 Subject: [PATCH] fix two small typo --- DataStructures/bitmap.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/DataStructures/bitmap.md b/DataStructures/bitmap.md index 80e73c9..36d2cf4 100644 --- a/DataStructures/bitmap.md +++ b/DataStructures/bitmap.md @@ -180,7 +180,7 @@ static inline void __clear_bit(long nr, volatile unsigned long *addr) } ``` -Yes. As we see, it takes the same set of arguments and contains very similar block of inline assembler. It just uses the [btr](http://x86.renejeschke.de/html/file_module_x86_id_24.html) instruction instead of `bts`. As we can understand form the function's name, it clears a given bit by the given address. The `btr` instruction acts like `btr`. This instruction also selects a given bit which is specified in the first operand, stores its value in the `CF` flag register and clears this bit in the given bit array which is specified with second operand. +Yes. As we see, it takes the same set of arguments and contains very similar block of inline assembler. It just uses the [btr](http://x86.renejeschke.de/html/file_module_x86_id_24.html) instruction instead of `bts`. As we can understand form the function's name, it clears a given bit by the given address. The `btr` instruction acts like `bts`. This instruction also selects a given bit which is specified in the first operand, stores its value in the `CF` flag register and clears this bit in the given bit array which is specified with second operand. The atomic variant of the `__clear_bit` is `clear_bit`: @@ -283,7 +283,7 @@ static inline void change_bit(long nr, volatile unsigned long *addr) } ``` -It is similar on `set_bit` function, but also has two differences. The first difference is `xor` operation instead of `or` and the second is `bts` instead of `bts`. +It is similar on `set_bit` function, but also has two differences. The first difference is `xor` operation instead of `or` and the second is `btc` instead of `bts`. For this moment we know the most important architecture-specific operations with bit arrays. Time to look at generic bitmap API.