From 73e86dfddc6c4375afc1b73cf9b47f13f73a1973 Mon Sep 17 00:00:00 2001
From: Bernhard Urban <lewurm@gmail.com>
Date: Thu, 22 Apr 2010 16:21:20 +0200
Subject: [PATCH] codea: chelper aka 'code helper'

... hilfsfunktionen zur registerwahl und aufbaufkts fuer assemblerfile
---
 codea/Makefile  |  9 +++++----
 codea/chelper.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 codea/chelper.h |  8 ++++++++
 3 files changed, 57 insertions(+), 4 deletions(-)
 create mode 100644 codea/chelper.c
 create mode 100644 codea/chelper.h

diff --git a/codea/Makefile b/codea/Makefile
index 1553b6b..2b0df7d 100644
--- a/codea/Makefile
+++ b/codea/Makefile
@@ -1,7 +1,7 @@
 SHELL := bash
 NAME := codea
 CFLAGS := -ansi -pedantic -D_GNU_SOURCE
-OBJS := scanner.o parser.o symtable.o code.o
+OBJS := scanner.o parser.o symtable.o code.o chelper.o
 
 all: $(NAME)
 
@@ -13,11 +13,12 @@ scanner.c: oxout.l
 	@echo "  FLEX    $<"
 	@flex -o$@ $<
 
-%.o: %.c parser.h symtable.h 
+#dirty deps ;)
+%.o: %.c parser.h symtable.h chelper.h
 	@echo "  CC      $<"
 	@gcc -c $(CFLAGS) $< #-Wall
 
-parser.c: oxout.y
+parser.c: oxout.y chelper.h
 	@echo "  YACC    $<"
 	@yacc -t -v -d $< -o $@
 
@@ -27,7 +28,7 @@ oxout.y oxout.l: parser.y scanner.lex
 	@echo "  OX      $^"
 	@ox $^
 
-%.c: %.bfe
+%.c: %.bfe chelper.h
 	@echo "  IBURG   $<"
 	@bfe < $< | iburg > $@
 
diff --git a/codea/chelper.c b/codea/chelper.c
new file mode 100644
index 0000000..c590232
--- /dev/null
+++ b/codea/chelper.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <string.h>
+#include "chelper.h"
+
+void func_header(char *s)
+{
+	printf("\t.globl %1$s\n\t.type %1$s, @function\n%1$s:\n", s);
+}
+
+void move(char *src, char *dst)
+{
+	if(strcmp(src,dst) != 0) {
+		printf("\tmovq %%%s, %%%s\n", src, dst);
+	}
+}
+
+void ret(void)
+{
+	printf("\tret\n");
+}
+
+char *next_reg(char *s, short skip)
+{
+	char *regs[] = {"rax", "r10", "r11", "r9", "r8", "rcx", "rdx", "rsi", "rdi"};
+	int i=0;
+	if (s != (char*) NULL) {
+		for(; i < 9;) {
+			if(!strcmp(s, regs[i++])) {
+				break;
+			}
+		}
+	}
+	if(skip) {
+		i++;
+	}
+	return regs[i];
+}
+
+char *param_reg(int num)
+{
+	char *regs[] = {"rdi", "rsi", "rdx", "rcx", "r8", "r9"};
+	return regs[num-1];
+}
+
diff --git a/codea/chelper.h b/codea/chelper.h
new file mode 100644
index 0000000..9336fd6
--- /dev/null
+++ b/codea/chelper.h
@@ -0,0 +1,8 @@
+#ifndef __CHELPER_H
+#define __CHELPER_H
+void func_header(char *s);
+char *next_reg(char *s, short skip);
+char *param_reg(int num);
+void ret(void);
+void move(char *src, char *dest);
+#endif
-- 
2.25.1