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Allow illegal shifts by zero to be recorded as logical shift lefts by zero.

This commit is contained in:
Nick Clifton 2000-08-17 23:46:43 +00:00
parent 3f215a1093
commit 4fb7971f4b
2 changed files with 17 additions and 6 deletions
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5
gas/ChangeLog
View File

@ -1,3 +1,8 @@
2000-08-17 Nick Clifton <nickc@redhat.com>
* config/tc-arm.c (decode_shift): Allow illegal shifts by zero
to be recoded as logical shift lefts by zero.
2000-08-16 Jim Wilson <wilson@cygnus.com>
* config/tc-ia64.c (specify_resource, case IA64_RS_GR): Handle

18
gas/config/tc-arm.c
View File

@ -2531,7 +2531,7 @@ decode_shift (str, unrestrict)
char ** str;
int unrestrict;
{
struct asm_shift_name * shift;
const struct asm_shift_name * shift;
char * p;
char c;
@ -2548,7 +2548,7 @@ decode_shift (str, unrestrict)
c = * p;
* p = '\0';
shift = (struct asm_shift_name *) hash_find (arm_shift_hsh, * str);
shift = (const struct asm_shift_name *) hash_find (arm_shift_hsh, * str);
* p = c;
if (shift == NULL)
@ -2602,10 +2602,16 @@ decode_shift (str, unrestrict)
|| (num == 32 && shift->properties->allows_32 == 0)
)
{
/* As a special case we allow ROR #0, but we issue a message
reminding the programmer that this is actually an RRX. */
if (num == 0 && shift->properties->index == SHIFT_ROR)
as_tsktsk (_("ROR #0 is actually RRX"));
/* As a special case we allow a shift of zero for
modes that do not support it to be recoded as an
logical shift left of zero (ie nothing). We warn
about this though. */
if (num == 0)
{
as_tsktsk (_("Shift of 0 ignored."));
shift = shift_names;
assert (shift->properties->index == SHIFT_LSL);
}
else
{
inst.error = _("Invalid immediate shift");