Add original unix v6

source/c/c2h.c

@@ -0,0 +1,125 @@
+/*
+ * Header for object code improver
+ */
+
+#define	JBR	1
+#define	CBR	2
+#define	JMP	3
+#define	LABEL	4
+#define	DLABEL	5
+#define	EROU	7
+#define	JSW	9
+#define	MOV	10
+#define	CLR	11
+#define	COM	12
+#define	INC	13
+#define	DEC	14
+#define	NEG	15
+#define	TST	16
+#define	ASR	17
+#define	ASL	18
+#define	SXT	19
+#define	CMP	20
+#define	ADD	21
+#define	SUB	22
+#define	BIT	23
+#define	BIC	24
+#define	BIS	25
+#define	MUL	26
+#define	DIV	27
+#define	ASH	28
+#define	XOR	29
+#define	TEXT	30
+#define	DATA	31
+#define	BSS	32
+#define	EVEN	33
+#define	MOVF	34
+#define	MOVOF	35
+#define	MOVFO	36
+#define	ADDF	37
+#define	SUBF	38
+#define	DIVF	39
+#define	MULF	40
+#define	CLRF	41
+#define	CMPF	42
+#define	NEGF	43
+#define	TSTF	44
+#define	CFCC	45
+#define	SOB	46
+#define	JSR	47
+#define	END	48
+
+#define	JEQ	0
+#define	JNE	1
+#define	JLE	2
+#define	JGE	3
+#define	JLT	4
+#define	JGT	5
+#define	JLO	6
+#define	JHI	7
+#define	JLOS	8
+#define	JHIS	9
+
+#define	BYTE	100
+
+struct node {
+	char	op;
+	char	subop;
+	struct	node	*forw;
+	struct	node	*back;
+	struct	node	*ref;
+	int	labno;
+	char	*code;
+	int	refc;
+};
+
+struct {
+	int	combop;
+};
+
+struct optab {
+	char	*opstring;
+	int	opcode;
+} optab[];
+
+char	line[512];
+struct	node	first;
+char	*curlp;
+int	nbrbr;
+int	nsaddr;
+int	redunm;
+int	iaftbr;
+int	njp1;
+int	nrlab;
+int	nxjump;
+int	ncmot;
+int	nrevbr;
+int	loopiv;
+int	nredunj;
+int	nskip;
+int	ncomj;
+int	nsob;
+int	nrtst;
+int	nlit;
+
+int	nchange;
+int	isn;
+int	debug;
+char	*lasta;
+char	*lastr;
+char	*firstr;
+char	revbr[];
+char	regs[12][20];
+char	conloc[20];
+char	conval[20];
+char	ccloc[20];
+
+#define	RT1	10
+#define	RT2	11
+#define	FREG	5
+#define	NREG	5
+#define	LABHS	127
+#define	OPHS	57
+
+struct optab *ophash[OPHS];
+struct { char lbyte; };