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Added -mwarn_unsigned_overflow so that defuault is to treat unsigned

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values as signed values if they start to overflow.
This commit is contained in:
Nick Clifton 1997-09-08 19:32:05 +00:00
parent 5d37a07bc5
commit 1fd5f4fc62
2 changed files with 17 additions and 1 deletions
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5
gas/ChangeLog
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@ -1,3 +1,8 @@
Mon Sep 8 12:33:40 1997 Nick Clifton <nickc@cygnus.com>
* config/tc-v850.c (v850_insert_operand): Add
-mwarn_unsigned_overflow.
Mon Sep 8 11:20:46 1997 Ian Lance Taylor <ian@cygnus.com>
* as.h: Don't declare alloca if it is a macro.

13
gas/config/tc-v850.c
View file

@ -32,6 +32,7 @@ static bfd_reloc_code_real_type hold_cons_reloc;
/* Set to TRUE if we want to be pedantic about signed overflows. */
static boolean warn_signed_overflows = FALSE;
static boolean warn_unsigned_overflows = FALSE;
/* Structure to hold information about predefined registers. */
@ -776,6 +777,12 @@ md_parse_option (c, arg)
return 1;
}
if (c == 'w' && strcmp (arg, "unsigned_overflow") == 0)
{
warn_unsigned_overflows = TRUE;
return 1;
}
return 0;
}
@ -1646,7 +1653,11 @@ v850_insert_operand (insn, operand, val, file, line)
else
{
max = (1 << operand->bits) - 1;
min = 0;
if (! warn_unsigned_overflows)
min = - (1 << (operand->bits - 1));
else
min = 0;
}
test = val;