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| author | Alan Modra <amodra@gmail.com> | 2012-02-27 06:31:57 +0000 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2012-02-27 06:31:57 +0000 |
| commit | cdb062354ec534d97597dcfa20fd032c799dd0c1 (patch) | |
| tree | a886139b36eb2b6ca213e27741db8aa5c4e38c25 /opcodes/arc-dis.c | |
| parent | 0d8abe3096bbaa819dd08679d5098d16c4bdd1e1 (diff) | |
| download | gdb-cdb062354ec534d97597dcfa20fd032c799dd0c1.zip gdb-cdb062354ec534d97597dcfa20fd032c799dd0c1.tar.gz gdb-cdb062354ec534d97597dcfa20fd032c799dd0c1.tar.bz2 | |
* arc-dis.c (BITS): Don't use shifts to mask off bits.
(FIELDD): Sign extend with xor,sub.
Diffstat (limited to 'opcodes/arc-dis.c')
| -rw-r--r-- | opcodes/arc-dis.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/opcodes/arc-dis.c b/opcodes/arc-dis.c index b4cc241..ac7379d 100644 --- a/opcodes/arc-dis.c +++ b/opcodes/arc-dis.c @@ -1,6 +1,6 @@ /* Instruction printing code for the ARC. - Copyright 1994, 1995, 1997, 1998, 2000, 2001, 2002, 2005, 2007, 2009, 2010 - Free Software Foundation, Inc. + Copyright 1994, 1995, 1997, 1998, 2000, 2001, 2002, 2005, 2007, 2009, + 2010, 2012 Free Software Foundation, Inc. Contributed by Doug Evans (dje@cygnus.com). This file is part of libopcodes. @@ -60,15 +60,14 @@ typedef enum } a4_decoding_class; #define BIT(word,n) ((word) & (1 << n)) -#define BITS(word,s,e) (((word) << (31 - e)) >> (s + (31 - e))) +#define BITS(word,s,e) (((word) >> s) & ((1 << (e + 1 - s)) - 1)) #define OPCODE(word) (BITS ((word), 27, 31)) #define FIELDA(word) (BITS ((word), 21, 26)) #define FIELDB(word) (BITS ((word), 15, 20)) #define FIELDC(word) (BITS ((word), 9, 14)) -/* FIELD D is signed in all of its uses, so we make sure argument is - treated as signed for bit shifting purposes: */ -#define FIELDD(word) (BITS (((signed int)word), 0, 8)) +/* FIELD D is signed. */ +#define FIELDD(word) ((BITS ((word), 0, 8) ^ 0x100) - 0x100) #define PUT_NEXT_WORD_IN(a) \ do \ |