[patch] mep-ivc2: range checking

[patch] mep-ivc2: range checking

[DJ Delorie]

This patch adds a custom parser for IVC2 move-immedate insns that
includes range checking, since those insns use multi-fields.
Committed.

[cgen]
	* cpu/mep.opc (parse_signed16_range): New.
	(parse_unsigned16_range): New.
	* cpu/mep-ivc2.cpu (imm16p0, simm16p0): Use them.
[opcodes]
	* mep-asm.c: Regenerate.
	* mep-desc.c: Regenerate.

Index: cgen/cpu/mep-ivc2.cpu
===================================================================
RCS file: /cvs/src/src/cgen/cpu/mep-ivc2.cpu,v
retrieving revision 1.3
diff -p -U3 -r1.3 mep-ivc2.cpu
--- cgen/cpu/mep-ivc2.cpu	27 May 2009 01:49:44 -0000	1.3
+++ cgen/cpu/mep-ivc2.cpu	28 May 2009 22:51:13 -0000
@@ -213,8 +213,8 @@
 (dnop ivc-x-0-4 "filler" (all-mep-isas) h-uint f-ivc2-4u0)
 (dnop ivc-x-0-5 "filler" (all-mep-isas) h-uint f-ivc2-5u0)
 
-(dnop imm16p0 "Imm16p0" (all-mep-isas) h-uint f-ivc2-imm16p0)
-(dnop simm16p0 "sImm16p0" (all-mep-isas) h-sint f-ivc2-simm16p0)
+(dpop imm16p0 "Imm16p0" (all-mep-isas) h-uint f-ivc2-imm16p0 "unsigned16_range")
+(dpop simm16p0 "sImm16p0" (all-mep-isas) h-sint f-ivc2-simm16p0 "signed16_range")
 
 
 (df f-ivc2-ccrn-c3hi "ccrn hi  2u28" (all-mep-isas) 28 2 UINT #f #f)
Index: cgen/cpu/mep.opc
===================================================================
RCS file: /cvs/src/src/cgen/cpu/mep.opc,v
retrieving revision 1.6
diff -p -U3 -r1.6 mep.opc
--- cgen/cpu/mep.opc	22 May 2009 17:37:43 -0000	1.6
+++ cgen/cpu/mep.opc	28 May 2009 22:51:13 -0000
@@ -88,7 +88,9 @@ extern int mep_cgen_insn_supported (CGEN
        const char * parse_mep_align  (CGEN_CPU_DESC, const char **, enum cgen_operand_type, long *);
        const char * parse_mep_alignu (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *);
 static const char * parse_signed16   (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_signed16_range   (CGEN_CPU_DESC, const char **, int, long *);
 static const char * parse_unsigned16 (CGEN_CPU_DESC, const char **, int, unsigned long *);
+static const char * parse_unsigned16_range (CGEN_CPU_DESC, const char **, int, unsigned long *);
 static const char * parse_lo16       (CGEN_CPU_DESC, const char **, int, long *, long);
 static const char * parse_unsigned7  (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *);
 static const char * parse_zero       (CGEN_CPU_DESC, const char **, int, long *);
@@ -343,6 +345,46 @@ parse_unsigned16 (CGEN_CPU_DESC cd,
   return parse_lo16 (cd, strp, opindex, (long *) valuep, 0);
 }
 
+static const char *
+parse_signed16_range (CGEN_CPU_DESC cd,
+		      const char **strp,
+		      int opindex,
+		      signed long *valuep)
+{
+  const char *errmsg = 0;
+  signed long value;
+
+  errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
+  if (errmsg)
+    return errmsg;
+
+  if (value < -32768 || value > 32767)
+    return _("Immediate is out of range -32768 to 32767");
+
+  *valuep = value;
+  return 0;
+}
+
+static const char *
+parse_unsigned16_range (CGEN_CPU_DESC cd,
+			const char **strp,
+			int opindex,
+			unsigned long *valuep)
+{
+  const char *errmsg = 0;
+  unsigned long value;
+
+  errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, & value);
+  if (errmsg)
+    return errmsg;
+
+  if (value > 65535)
+    return _("Immediate is out of range 0 to 65535");
+
+  *valuep = value;
+  return 0;
+}
+
 /* A special case of parse_signed16 which accepts only the value zero.  */
 
 static const char *