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xtensa: gas: support optional immediate simcall parameter 

Starting with RH.0 release Xtensa ISA adds immediate parameter to
simcall opcode. For assembly source compatibility treat "simcall"
instruction without parameter as "simcall 0" when parameter is required.

2020-04-29  Max Filippov  <jcmvbkbc@gmail.com>
gas/
	* config/tc-xtensa.c (XTENSA_MARCH_EARLIEST): Define macro as 0
	if it's not defined.
	(microarch_earliest): New static variable.
	(xg_translate_idioms): Translate "simcall" to "simcall 0" when
	simcall opcode has mandatory parameter.
	(xg_init_global_config): Initialize microarch_earliest.
This commit is contained in:
Max Filippov 2020-04-28 04:15:05 -07:00
parent ffc2844e96
commit 935f1f4ba3
2 changed files with 29 additions and 0 deletions
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9
gas/ChangeLog
View File

@ -1,3 +1,12 @@
2020-04-29 Max Filippov <jcmvbkbc@gmail.com>
* config/tc-xtensa.c (XTENSA_MARCH_EARLIEST): Define macro as 0
if it's not defined.
(microarch_earliest): New static variable.
(xg_translate_idioms): Translate "simcall" to "simcall 0" when
simcall opcode has mandatory parameter.
(xg_init_global_config): Initialize microarch_earliest.
2020-04-29 Nick Clifton <nickc@redhat.com>
PR 22699

20
gas/config/tc-xtensa.c
View File

@ -35,6 +35,10 @@
#define XSHAL_ABI 0
#endif
#ifndef XTENSA_MARCH_EARLIEST
#define XTENSA_MARCH_EARLIEST 0
#endif
#ifndef uint32
#define uint32 unsigned int
#endif
@ -74,6 +78,8 @@ const char FLT_CHARS[] = "rRsSfFdDxXpP";
bfd_boolean density_supported;
bfd_boolean absolute_literals_supported;
static unsigned microarch_earliest;
static vliw_insn cur_vinsn;
unsigned xtensa_num_pipe_stages;
@ -2502,6 +2508,18 @@ xg_translate_idioms (char **popname, int *pnum_args, char **arg_strings)
return 0;
}
/* Without an operand, this is given a default immediate operand of 0. */
if ((strcmp (opname, "simcall") == 0 && microarch_earliest >= 280000))
{
if (*pnum_args == 0)
{
arg_strings[0] = (char *) xmalloc (2);
strcpy (arg_strings[0], "0");
*pnum_args = 1;
}
return 0;
}
if (strcmp (opname, "bbsi.l") == 0)
{
if (xg_check_num_args (pnum_args, 3, opname, arg_strings))
@ -5236,6 +5254,8 @@ xg_init_global_config (void)
directive_state[directive_density] = XCHAL_HAVE_DENSITY;
directive_state[directive_absolute_literals] = XSHAL_USE_ABSOLUTE_LITERALS;
microarch_earliest = XTENSA_MARCH_EARLIEST;
}
void