[PPC] Expose instruction formats (capstone-engine#2276)

* Expose PPC formats in PPC details

* Add PPC format note in v6 release guide.

* Update python bindings

Mapping.c

@@ -225,6 +225,19 @@ void map_groups(MCInst *MI, const insn_map *imap)
 #endif // CAPSTONE_DIET
 }
 
+/// Returns the pointer to the supllementary information in
+/// the instruction mapping table @imap or NULL in case of failure.
+const void *map_get_suppl_info(MCInst *MI, const insn_map *imap)
+{
+#ifndef CAPSTONE_DIET
+	if (!MI->flat_insn->detail)
+		return NULL;
+
+	unsigned Opcode = MCInst_getOpcode(MI);
+	return &imap[Opcode].suppl_info;
+#endif // CAPSTONE_DIET
+}
+
 // Search for the CS instruction id for the given @MC_Opcode in @imap.
 // return -1 if none is found.
 unsigned int find_cs_id(unsigned MC_Opcode, const insn_map *imap,

Mapping.h

@@ -114,6 +114,8 @@ void map_groups(MCInst *MI, const insn_map *imap);
 
 void map_cs_id(MCInst *MI, const insn_map *imap, unsigned int imap_size);
 
+const void *map_get_suppl_info(MCInst *MI, const insn_map *imap);
+
 #define DECL_get_detail_op(arch, ARCH) \
 	cs_##arch##_op *ARCH##_get_detail_op(MCInst *MI, int offset);
 

arch/PowerPC/PPCMapping.c

@@ -197,6 +197,10 @@ void PPC_set_instr_map_data(MCInst *MI, const uint8_t *Bytes, size_t BytesLen)
 	map_groups(MI, ppc_insns);
 	PPC_add_branch_predicates(MI, Bytes, BytesLen);
 	PPC_check_updates_cr0(MI);
+	const ppc_suppl_info *suppl_info = map_get_suppl_info(MI, ppc_insns);
+	if (suppl_info) {
+		PPC_get_detail(MI)->format = suppl_info->form;
+	}
 }
 
 /// Inialize PPCs detail.

bindings/python/capstone/ppc.py

@@ -54,6 +54,7 @@ class CsPpc(ctypes.Structure):
     _fields_ = (
         ('bc', PpcBC),
         ('update_cr0', ctypes.c_bool),
+        ('format', ctypes.c_uint32),
         ('op_count', ctypes.c_uint8),
         ('operands', PpcOp * 8),
     )