diff options
Diffstat (limited to 'opcodes/cgen-asm.c')
| -rw-r--r-- | opcodes/cgen-asm.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/opcodes/cgen-asm.c b/opcodes/cgen-asm.c index f5fde40829..901a578f54 100644 --- a/opcodes/cgen-asm.c +++ b/opcodes/cgen-asm.c @@ -1,6 +1,6 @@ /* CGEN generic assembler support code. - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007 - Free Software Foundation, Inc. + Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007, + 2011 Free Software Foundation, Inc. This file is part of libopcodes. @@ -268,7 +268,23 @@ cgen_parse_signed_integer (CGEN_CPU_DESC cd, &result, &value); /* FIXME: Examine `result'. */ if (!errmsg) - *valuep = value; + { + /* Handle the case where a hex value is parsed on a 64-bit host. + A value like 0xffffe000 is clearly intended to be a negative + 16-bit value, but on a 64-bit host it will be parsed by gas + as 0x00000000ffffe000. + + The shifts below are designed not to produce compile time + warnings on a 32-bit host. */ + if (sizeof (value) > 4 + && result == CGEN_PARSE_OPERAND_RESULT_NUMBER + && value > 0 + && (value & 0x80000000) + && ((value >> 31) == 1)) + value |= -1 << 31; + + *valuep = value; + } return errmsg; } |