Add little endian support for TMS320c64x. (#2649)

This requires now to initialize TMS320c64x with the CS_MODE_BIG_ENDIAN flag.

Author: Rot127

arch/TMS320C64x/TMS320C64xDisassembler.c

@@ -600,7 +600,7 @@ bool TMS320C64x_getInstruction(csh ud, const uint8_t *code, size_t code_len,
 	if(MI->flat_insn->detail)
 		memset(MI->flat_insn->detail, 0, offsetof(cs_detail, tms320c64x)+sizeof(cs_tms320c64x));
 
-	insn = (code[3] << 0) | (code[2] << 8) | (code[1] << 16) | ((uint32_t) code[0] << 24);
+	insn = readBytes32(MI, code);
 	result = decodeInstruction_4(DecoderTable32, MI, insn, address, info, 0);
 
 	if(result == MCDisassembler_Success) {

arch/TMS320C64x/TMS320C64xModule.c

@@ -33,6 +33,16 @@ cs_err TMS320C64x_global_init(cs_struct *ud)
 
 cs_err TMS320C64x_option(cs_struct *handle, cs_opt_type type, size_t value)
 {
+	switch (type) {
+	case CS_OPT_MODE:
+		handle->mode |= (cs_mode)value;
+		break;
+	case CS_OPT_SYNTAX:
+		handle->syntax |= (int)value;
+		break;
+	default:
+		break;
+	}
 	return CS_ERR_OK;
 }
 

cs.c

@@ -169,7 +169,7 @@ static const struct {
 	{
 		TMS320C64x_global_init,
 		TMS320C64x_option,
-		~(CS_MODE_BIG_ENDIAN),
+		~(CS_MODE_LITTLE_ENDIAN | CS_MODE_BIG_ENDIAN),
 	},
 #else
 	{ NULL, NULL, 0 },

cstool/cstool.c

@@ -66,6 +66,7 @@ static struct {
 	{ "m68k", CS_ARCH_M68K, CS_MODE_BIG_ENDIAN },
 	{ "m68k40", CS_ARCH_M68K, CS_MODE_M68K_040 },
 	{ "tms320c64x", CS_ARCH_TMS320C64X, CS_MODE_BIG_ENDIAN },
+	{ "tms320c64xle", CS_ARCH_TMS320C64X, CS_MODE_LITTLE_ENDIAN },
 	{ "m6800", CS_ARCH_M680X, CS_MODE_M680X_6800 },
 	{ "m6801", CS_ARCH_M680X, CS_MODE_M680X_6801 },
 	{ "m6805", CS_ARCH_M680X, CS_MODE_M680X_6805 },

suite/cstest/issues.cs

@@ -1066,3 +1066,11 @@
 !# issue 2424
 !# CS_ARCH_SH, CS_MODE_SH2A | CS_MODE_BIG_ENDIAN, CS_OPT_DETAIL
 0x0: 0x32,0x11,0x92,0x00 == movu.w @(1024,r1),r2 ; operands[0].type: MEM ; operands[0].mem.reg: REG = r1 ; operands[0].mem.disp: 0x400 ; address mode: Register Indirect with Predecrement ; operands[1].type: REG = r2
+
+!# issue 2646
+!# CS_ARCH_TMS320C64X, CS_MODE_LITTLE_ENDIAN, CS_OPT_DETAIL
+0x0: 0xa9,0xff,0x7f,0x02 == mvk.S1 -1, a4 ||
+
+!# issue 2646
+!# CS_ARCH_TMS320C64X, CS_MODE_BIG_ENDIAN, CS_OPT_DETAIL
+0x0: 0x02,0x7f,0xff,0xa9 == mvk.S1 -1, a4 ||