[PATCH] gas: blackfin: reject multiple store insns in parallel insns
Mike Frysinger
vapier@gentoo.org
Tue Sep 21 08:08:00 GMT 2010
From: Robin Getz <robin.getz@analog.com>
Check for & reject attempts to use multiple store insns in a single
parallel insn combination. These are illegal per the Blackfin ISA.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-09-21 Robin Getz <robin.getz@analog.com>
* config/bfin-parse.y (is_store): New function.
(gen_multi_instr_1): Check parallel slots for store insns.
---
gas/config/bfin-parse.y | 33 +++++++++++++++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/gas/config/bfin-parse.y b/gas/config/bfin-parse.y
index 0dd729c..90d3b04 100644
--- a/gas/config/bfin-parse.y
+++ b/gas/config/bfin-parse.y
@@ -380,6 +380,36 @@ is_group2 (INSTR_T x)
return 0;
}
+static int
+is_store (INSTR_T x)
+{
+ if (!x)
+ return 0;
+
+ if ((x->value & 0xf000) == 0x8000)
+ {
+ int aop = ((x->value >> 9) & 0x3);
+ int w = ((x->value >> 11) & 0x1);
+ if (!w || aop == 3)
+ return 0;
+ return 1;
+ }
+
+ if (((x->value & 0xFF60) == 0x9E60) || /* dagMODim_0 */
+ ((x->value & 0xFFF0) == 0x9F60)) /* dagMODik_0 */
+ return 0;
+
+ /* decode_dspLDST_0 */
+ if ((x->value & 0xFC00) == 0x9C00)
+ {
+ int w = ((x->value >> 9) & 0x1);
+ if (w)
+ return 1;
+ }
+
+ return 0;
+}
+
static INSTR_T
gen_multi_instr_1 (INSTR_T dsp32, INSTR_T dsp16_grp1, INSTR_T dsp16_grp2)
{
@@ -400,6 +430,9 @@ gen_multi_instr_1 (INSTR_T dsp32, INSTR_T dsp16_grp1, INSTR_T dsp16_grp2)
yyerror ("anomaly 05000074 - Multi-Issue Instruction with \
dsp32shiftimm in slot1 and P-reg Store in slot2 Not Supported");
+ if (is_store (dsp16_grp1) && is_store (dsp16_grp2))
+ yyerror ("Only one instruction in multi-issue instruction can be a store");
+
return bfin_gen_multi_instr (dsp32, dsp16_grp1, dsp16_grp2);
}
--
1.7.2
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