--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mc-code-ia32.c	Thu Feb 20 03:29:15 2003 +0900
@@ -0,0 +1,1304 @@
+/* Micro-C Code Generatation Part for intel386 */
+/* $Id$ */
+
+#define EXTERN extern
+#include "mc.h"
+#include "mc-codegen.h"
+
+#define TEXT_EMIT_MODE 0
+#define DATA_EMIT_MODE 1
+#define RODATA_EMIT_MODE 2
+
+static int output_mode = TEXT_EMIT_MODE;
+static int data_alignment = 0;
+
+static int code_disp_label;
+static int func_disp_label;
+
+/*
+                                           -16  -8 local2
+                                           -12  -4 local1
+                                            -8  8  arg3
+                                            -4  4  arg2
+                                             0  0  arg1
+         local2     -20 4                    0    (%edi)
+         local1 <-- -16 0 local variable     0    (%esi)
+        %edi        -12  <- disp_offset          %ebp
+        %esi         -8
+        %ebx         -4
+        %ebp = %esp   0
+        %eip          4   <- arg_offset
+          arg1        8 0
+          arg2       12 4
+            see enter/enter1/leave           see code_enter
+ */
+int arg_offset = 8;
+int disp_offset = -12;
+int func_disp_offset = -12;
+int code_disp_offset = 0;
+int jump_offset = 0;
+
+int size_of_int = 4;
+int endian = 0;
+int MAX_REGISTER=6;         /* intel386のレジスタを4つまで使う*/
+int REAL_MAX_REGISTER=8;    /* intel386のレジスタが8つということ*/
+int MAX_DATA_REG=4;    
+int MAX_POINTER=3;    
+int MAX_REGISTGER_VAR=2;    
+
+EXTERN int  creg;     /* current register */
+EXTERN int  dreg;     /* temporary register */
+EXTERN int  reg_sp;   /* REGister Stack-Pointer */
+
+
+#define REG_EAX   0
+#define REG_EBX   1
+#define REG_ECX   2
+#define REG_EDX   3
+#define REG_ESI   4
+#define REG_EDI   5
+#define REG_EBP   6
+#define REG_ESP   7
+
+
+#define DATA_REG 0    
+#define POINTER_REG 3    
+static char *reg_name[8]; 
+static char *reg_name_l[4];
+static char *reg_name_w[4];
+
+extern int  creg;     /* current register */
+extern int  dreg;     /* temporary register */
+extern int  reg_sp;   /* REGister Stack-Pointer */
+
+#define MAX_MAX 10
+int rname[MAX_MAX];
+int regs[MAX_MAX];       /* 使われているレジスタを示すフラグ */
+int reg_stack[MAX_MAX];  /* 実際のレジスタの領域 */
+int regv[MAX_MAX];       /* 値が入っているかどうか */
+
+
+void use_register(int virt, int real, int move);
+void code_preinc(int e1,int e2) ;
+void code_cmp_register(int e2) ;
+void code_assign_gvar(int e2,int byte) ;
+void tosop(int op,int oreg);
+void edx_cleanup();
+void shift(char *op, int reg);
+void ld_indexx(int byte, int n, int xreg);
+void jmp(int l);
+void global_table(void);
+void local_table(void);
+void text_mode(void);
+void data_mode(char *name);
+
+char *register_name(int i,int byte);
+int register_var(int r);
+int get_register_var(void);
+void emit_push(void);
+void emit_push_x(int xreg);
+int emit_pop(int type);
+void code_crlvar(int e2);
+void code_preinc(int e1,int e2);
+void code_postinc(int e1,int e2);
+void code_bool(int e1);
+void string(int e1);
+void emit_copy(int from,int  to,int length,int offset,int value,int det);
+int struct_push(int e4,int t);
+void function(int e1);
+void code_assop(int op,int byte);
+int edx_setup();
+void opening(char *filename);
+void code_leave(char *name);
+int lvar(int l);
+
+void
+code_init(void)
+{
+    arg_offset = 8;
+    func_disp_offset = -12;
+    disp_offset = -12;
+    size_of_int = 4;
+    endian = 0;
+    MAX_REGISTER=6;
+    MAX_DATA_REG=4;    
+    MAX_POINTER=3;    
+    MAX_REGISTER_VAR=2;    
+
+    reg_name[REG_EAX] = "%eax";
+    reg_name[REG_EBX] = "%ebx";
+    reg_name[REG_ECX] = "%ecx";
+    reg_name[REG_EDX] = "%edx";
+    reg_name[REG_ESI] = "%esi";
+    reg_name[REG_EDI] = "%edi";
+    reg_name[REG_EBP] = "%ebp";
+    reg_name[REG_ESP] = "%esp";
+    reg_name_l[REG_EAX] = "%al";
+    reg_name_l[REG_EBX] = "%bl";
+    reg_name_l[REG_ECX] = "%cl";
+    reg_name_l[REG_EDX] = "%dl";
+    reg_name_w[REG_EAX] = "%ax";
+    reg_name_w[REG_EBX] = "%bx";
+    reg_name_w[REG_ECX] = "%cx";
+    reg_name_w[REG_EDX] = "%dx";
+
+}
+
+char *
+register_name(int i,int byte)
+{
+    if (i<0) {
+	error(REG_ERR);
+	return "%eax";
+    }
+    if (byte && rname[i] <= REG_EDX) {
+	return reg_name_l[rname[i]];
+    } else {
+	return reg_name[rname[i]]; /* should be error */
+    }
+}
+
+extern int rname[MAX_MAX];
+extern int regs[MAX_MAX];       /* 使われているレジスタを示すフラグ */
+extern int reg_stack[MAX_MAX];  /* 実際のレジスタの領域 */
+extern int regv[MAX_MAX];       /* 値が入っているかどうか */
+
+extern int creg_regvar;
+
+void
+gexpr_code_init(void){
+    use_register(creg,REG_EAX,0);
+    regv[dreg]=0;
+    creg_regvar = -1;
+}
+
+int
+register_var(int r) {
+    return virtual(r+REG_ESI);
+}
+
+int
+get_register_var(void)
+{
+    int i;
+    for(i=REG_ESI;i<REG_ESP;i++) {
+        if (! regs[i]) {    /* 使われていないなら */
+            regs[i]=1;      /* そのレジスタを使うことを宣言し */
+            regv[i]=0;
+            return i;       /* その場所を表す番号を返す */
+        }
+    }
+    return -1;
+}
+
+void 
+use_register(int virt, int real, int move)
+{
+    int real_v;
+    char *move_op;
+    if (rname[virt]==real)
+	return;
+    real_v = virtual(real);
+    move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n";
+    if (move || (regv[real_v])) {
+	printf(move_op,reg_name[rname[virt]],reg_name[real]);
+    } 
+    rname[real_v] = rname[virt];
+    rname[virt] = real; 
+}
+
+void 
+use_pointer(int virt, int move)
+{
+    int i;
+    if (rname[virt]>=POINTER_REG)
+	return;
+    for(i=POINTER_REG;i<MAX_REGISTER;i++) {
+	if (!regs[virtual(i)]) {
+	    use_register(virt,i,move);
+	    return;
+	}
+    }
+    /* we prefer EBX */
+    use_register(virt,REG_EBX,move);
+}
+
+void 
+use_data_reg(int virt, int move)
+{
+    int i;
+    if (rname[virt]<MAX_DATA_REG)
+	return;
+    for(i=0;i<MAX_DATA_REG;i++) {
+	if (!regs[virtual(i)]) {
+	    use_register(virt,i,move);
+	    return;
+	}
+    }
+    /* we prefer EBX */
+    use_register(virt,REG_EBX,move);
+}
+
+
+void 
+emit_push(void)
+{
+    int new_reg;
+    new_reg = get_register();
+    if(new_reg<0) {                     /* もうレジスタがない */
+	reg_stack[reg_sp++] =  -1;
+	printf("\tpushl %s\n",register_name(creg,0));
+	/* creg is used soon, don't regv[creg]=0 */
+    } else {
+	reg_stack[reg_sp++] = creg;     /* push するかわりにレジスタを使う */
+	creg = new_reg;
+	regv[creg]=1;
+    }
+}
+
+void 
+emit_push_x(int xreg)
+{
+    int new_reg;
+    new_reg = get_register();
+    if(new_reg<0) {                     /* もうレジスタがない */
+	reg_stack[reg_sp++] =  -1;
+	printf("\tpushl %s\n",register_name(xreg,0));
+	/* creg is used soon, don't regv[xreg]=0 */
+    } else {
+	reg_stack[reg_sp++] = xreg;     /* push するかわりにレジスタを使う */
+	xreg = new_reg;
+	regv[xreg]=1;
+    }
+}
+
+int
+emit_pop(int type)
+{
+    int xreg;
+    if ((xreg=pop_register())==-1) {
+	if (type==POINTER_REG)
+	    use_pointer(dreg,0);
+	else if (type==DATA_REG)
+	    use_data_reg(dreg,0);
+if (regv[dreg]) {
+    printf("# emit_pop dreg conflict\n");
+}
+	printf("\tpopl %s\n",register_name(dreg,0));
+	xreg = dreg;
+	regv[xreg]=1;
+    } 
+    return xreg;
+}
+
+
+void
+code_gvar(int e1) {
+    printf("\tmovl $%s,%s\n",(char *)caddr(e1),register_name(creg,0));
+}
+
+
+void
+code_rgvar(int e1) {
+    printf("\tmovl %s,%s\n",(char *)caddr(e1),register_name(creg,0));
+}
+
+void
+code_crgvar(e1){
+    printf("\tmovsbl %s,%s\n",(char *)caddr(e1),register_name(creg,0));
+}
+
+
+void
+code_lvar(int e2) {
+    printf("\tlea %d(%%ebp),%s\n",e2,register_name(creg,0));
+}
+
+
+void
+code_register(int e2) {
+    printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0));
+}
+
+
+void
+code_rlvar(int e2) {
+    printf("\tmovl %d(%%ebp),%s\n",e2,register_name(creg,0));
+}
+
+
+void
+code_crlvar(int e2) {
+    printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),register_name(creg,0));
+}
+
+
+void
+code_fname(char *e2) {
+    printf("\tmovl $%s,%s\n",e2,register_name(creg,0));
+}
+
+
+void
+code_const(int e2) {
+    printf("\tmovl $%d,%s\n",e2,register_name(creg,0));
+}
+
+
+void
+code_neg() {
+    printf("\tnegl %s\n", register_name(creg,0));
+}
+
+
+void
+code_not() {
+    printf("\tnotl %s\n", register_name(creg,0));
+}
+
+
+void
+code_lnot() {
+    char *xrn;
+    use_data_reg(creg,1);
+    xrn = register_name(creg,1);
+    printf("\tcmpl $0,%s\n", register_name(creg,0));
+    printf("\tsete %s\n", xrn);
+    printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0));
+}
+
+void
+code_preinc(int e1,int e2) {
+    char *xrn;
+    if (car(e2)==REGISTER) {
+	printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
+	printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
+	return;
+    } 
+    g_expr(e2);
+    xrn = register_name(creg,0);
+    printf("\taddl $%d,(%s)\n",caddr(e1),xrn);
+    printf("\tmovl (%s),%s\n",xrn,xrn);
+}
+
+
+void
+code_postinc(int e1,int e2) {
+    char *xrn;
+    if (car(e2)==REGISTER) {
+	printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
+	printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
+	return;
+    } 
+    g_expr(e2);
+    emit_push();  
+    xrn = register_name((e2=emit_pop(0)),0);
+    printf("\tmovl (%s),%s\n",xrn,register_name(creg,0));
+    printf("\taddl $%d,(%s)\n",caddr(e1),xrn);
+    emit_pop_free(e2);
+}
+
+
+void
+code_cpostinc(int e1,int e2) {
+    char *xrn;
+    if (car(e2)==REGISTER) {
+	printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
+	printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
+	return;
+    } 
+    g_expr(e2);
+    emit_push();
+    xrn = register_name((e2=emit_pop(0)),1);
+    printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0));
+    printf("\tincl (%s)\n",xrn);
+    emit_pop_free(e2);
+}
+
+
+void
+code_cpreinc(int e1,int e2) {
+    if (car(e2)==REGISTER) {
+	printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
+	printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
+	return;
+    } 
+    g_expr(e2);
+    printf("\tincl (%s)\n",register_name(creg,0));
+    printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0));
+}
+
+
+void
+code_cpostdec(int e1,int e2) {
+    if (car(e2)==REGISTER) {
+	printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
+	printf("\tdecl %s\n",register_name(cadr(e2),0));
+	return;
+    } 
+    g_expr(e2);
+    printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0));
+    printf("\tdecl (%s)\n",register_name(creg,0));
+}
+
+
+void
+code_cpredec(int e1,int e2) {
+    if (car(e2)==REGISTER) {
+	printf("\tdecl %s\n",register_name(cadr(e2),0));
+	printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
+	return;
+    } 
+    g_expr(e2);
+    emit_push();
+    e2 = emit_pop(0);
+    printf("\tdecl (%s)\n",register_name(e2,0));
+    printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0));
+    emit_pop_free(e2);
+}
+
+
+void
+code_return() {
+    printf("\tleal _%d,%s\n",retcont,register_name(creg,0));
+}
+
+
+void
+code_environment() {
+    printf("\tmovl %%ebp,%s\n",register_name(creg,0));
+}
+
+
+void
+code_bool(int e1) {
+    char *xrn;
+    int e2,e3;
+    b_expr(e1,1,e2=fwdlabel(),1);  /* including > < ... */
+    xrn = register_name(creg,0);
+    printf("\txorl %s,%s\n",xrn,xrn);
+    jmp(e3=fwdlabel());
+    fwddef(e2);
+    printf("\tmovl $1,%s\n",xrn);
+    fwddef(e3);
+}
+
+char *
+code_gt(int cond) {
+    return (cond?"g":"le");
+}
+
+char *
+code_ugt(int cond) {
+    return (cond?"a":"be");
+}
+
+char *
+code_ge(int cond) {
+    return (cond?"ge":"l");
+}
+
+char *
+code_uge(int cond) {
+    return (cond?"ae":"b");
+}
+
+char *
+code_eq(int cond) {
+    return (cond?"e":"ne");
+}
+
+void
+code_cmp_crgvar(int e1) {
+    printf("\tcmpb $0,%s\n",(char *)caddr(e1));
+}
+
+
+void
+code_cmp_crlvar(int e1) {
+    printf("\tcmpb $0,%d(%%ebp)\n",e1);
+}
+
+
+void
+code_cmp_rgvar(int e1) {
+    printf("\tcmpl $0,%s\n",(char *)caddr(e1));
+}
+
+
+void
+code_cmp_rlvar(int e1) {
+    printf("\tcmpl $0,%d(%%ebp)\n",e1);
+}
+
+
+void
+code_cmp_register(int e2) {
+    printf("\tcmpl $0,%s\n",register_name(e2,0));
+}
+
+
+void
+ascii(char *s)
+{
+    printf("\t.string \"");
+    while(*s) {
+	if (*s=='\n')
+	    printf("%cn",92);
+	else if (*s<' ')
+	    printf("%c%03o",92,*s);
+	else if (*s==34)
+	    printf("%c%c",92,34);
+	else 
+	    printf("%c",*s);
+	s++;
+    }
+    printf("%c\n",34);
+}
+
+void
+string(int e1)
+{
+    char *s;
+    int i,lb;
+
+    if (0) {
+	s=(char *)cadr(e1);
+	lb=fwdlabel();
+	printf("\tjmp _%d\n",lb);
+	i=backdef();
+	ascii(s);
+	printf("\t.align 2\n");
+	fwddef(lb);
+	printf("\tlea _%d,%s\n",i,register_name(creg,0));
+    } else {
+	s=(char *)cadr(e1);
+	printf(".section\t.rodata\n");
+	lb=fwdlabel();
+	printf("_%d:\n",lb);
+	ascii(s);
+	if (output_mode==TEXT_EMIT_MODE) {
+	    printf(".text\n");
+	} else {
+	    text_mode();
+	}
+	printf("\tlea _%d,%s\n",lb,register_name(creg,0));
+    }
+}
+
+#define MAX_COPY_LEN 20
+
+void 
+emit_copy(int from,int  to,int length,int offset,int value,int det)
+{
+    int fix = 0;
+    /* length <0 means upward direction copy */
+    switch (length) {
+    case 0:	break;
+    case 1: case -1:
+	printf("\tmovb %d(%s),%s\n",offset,
+	    register_name(from,0), reg_name_l[rname[dreg]] );
+	printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset,
+	    register_name(to,0));
+	break;
+    case 2: case -2:
+	printf("\tmovw %d(%s),%s\n",offset,
+	    register_name(from,0), reg_name_w[rname[dreg]] );
+	printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset,
+	    register_name(to,0));
+	break;
+    case 4: case -4:
+	printf("\tmovl %d(%s),%s\n",offset,
+	    register_name(from,0), register_name(dreg,0));
+	printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset,
+	    register_name(to,0));
+	break;
+    default:
+	if (-MAX_COPY_LEN<length && length <0) {
+	    for(;length<=4;length+=4,offset-=4)
+		emit_copy(from,to,4,offset,0,det);
+	    for(;length<=2;length+=2,offset-=2)
+		emit_copy(from,to,2,offset,0,det);
+	    if(length>0)
+		emit_copy(from,to,length,offset,0,det);
+	    break;
+	} else if (length <=MAX_COPY_LEN) {
+	    for(;length>=4;length-=4,offset+=4)
+		emit_copy(from,to,4,offset,0,det);
+	    for(;length>=2;length-=2,offset+=2)
+		emit_copy(from,to,2,offset,0,det);
+	    if(length>0)
+		emit_copy(from,to,length,offset,0,det);
+	    break;
+	}
+	if (det) {
+/*
+   call bcopy
+	    g_expr(list3(FUNCTION,,);
+	    break;
+ */
+	}
+	use_register(from,REG_ESI,1);
+	use_register(to,  REG_EDI,1);
+	use_register(dreg,REG_ECX,0);
+	if (length<0) {
+	    printf("\tmovl $%d,%%ecx\n",-length/4);
+	    printf("\taddl $%d,%%esi\n",-length);
+	    printf("\taddl $%d,%%edi\n",-length);
+	    printf("\tstd\n\trep\n\tmovsl\n");
+	    if(length%4) {
+		emit_copy(from,to,length,offset+length/4,0,det);
+	    }
+	} else {
+	    printf("\tmovl $%d,%%ecx\n",length/4);
+	    fix = (length/4)*4;
+	    printf("\tcld\n\trep\n\tmovsl\n");
+	    if(length%4) {
+		emit_copy(from,to,length,offset+length/4,0,det);
+	    }
+	}
+    }
+    if (value) {
+    /* creg must point top of the destination data */
+    /* this code is necessary for the value of assignment or function call */
+    /* otherwise we don't need this */
+	if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0));
+	if(creg!=to) {
+	    if (to==dreg) 
+		printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0));
+	    else {
+		free_register(creg); creg=to;
+	    }
+	}
+    }
+    regv[from]=regv[to]=regv[dreg]=0;
+    regv[creg]=1;
+}
+
+int
+struct_push(int e4,int t) 
+{
+    int length,xreg,save,lreg;
+    g_expr(e4);
+    length=size(t); 
+    if(length%size_of_int) {
+	length += size_of_int - (length%size_of_int);
+    }
+    if (length==4) {
+	printf("\tpushl (%s)\n",register_name(creg,0)); return 1;
+    }
+    if (length==8) {
+	printf("\tpushl 4(%s)\n",register_name(creg,0));
+	printf("\tpushl (%s)\n",register_name(creg,0)); return 2;
+    }
+    printf("\tsubl $%d,%%esp\n",length);
+    if (register_full()) {
+	save = 1;
+	for(lreg=0;lreg==creg||lreg==dreg;lreg++);
+	printf("\tpushl %s\n",register_name(lreg,0));
+	xreg = lreg; regv[xreg]=0;
+    } else {
+	save=0;
+	xreg = get_register();
+    }
+    if (save) 
+	printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0));
+    else
+	printf("\tmovl %%esp,%s\n",register_name(xreg,0));
+    regv[xreg]=1;
+    /* downward direction copy */
+    emit_copy(creg,xreg,length,0,0,1);
+    /* we have value in creg, it may be changed */
+    if (save) {
+	if(creg==xreg) {
+	    creg = get_register();   /* creg is freed in emit_copy */
+	}
+	printf("\tpopl %s\n",register_name(xreg,0));
+	regv[xreg]=1;
+    } else
+	free_register(xreg);
+    return length/size_of_int;
+}
+
+void
+function(int e1)
+{
+    int e2,e3,e4,e5,nargs,t;
+    NMTBL *n;
+    int save,saved;
+    if (free_register_count()<1) {
+        for(save = 0;save==dreg||save==creg;save++);
+	printf("\tpushl %s\n",register_name(save,0));
+        saved = 1;
+    } else {
+        save = get_register();
+        saved = 0;
+    }
+    regv[save]=0;
+    e2 = cadr(e1);
+    nargs = 0;
+    for (e3 = caddr(e1); e3; e3 = cadr(e3)) {	
+	t=caddr(e3);
+	n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
+	if(scalar(t)) {
+	    g_expr(e4);
+	    printf("\tpushl %s\n",register_name(creg,0));
+	} else if (car(t)==STRUCT||car(t)==UNION) {
+	    nargs += struct_push(e4,t);
+	    continue;
+	} else {
+	    error(TYERR);
+	}
+	++nargs;
+    }
+    if (car(e2) == FNAME) {	
+	n=(NMTBL *)cadr(e2);
+    } else {	
+        use_register(creg,REG_EAX,0);
+	g_expr(e2);
+    }
+
+    /* we don't have to save creg nor dreg */
+    regs[creg]=0; regs[dreg]=0;
+    regv[creg]= regv[dreg]= regv[save]= 0;
+    use_register(creg,REG_EAX,0);
+    use_register(dreg,REG_EDX,0);  /* will be destroyed */
+    use_register(save,REG_ECX,0);  /* will be destroyed */
+    regs[creg]=1; regs[dreg]=1;
+
+    if (car(e2) == FNAME) {	
+	printf("\tcall\t%s\n",n->nm);
+    } else {
+	printf("\tcall\t*%s\n",register_name(creg,0));
+    }
+    if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs);
+    if (saved) {
+	printf("\tpopl %s\n",register_name(save,0));
+    } else {
+        free_register(save);
+    }
+    regv[save]=0;
+    regv[creg]=1;
+}
+
+void
+code_frame_pointer(int e3) {
+    printf("\tmovl %s,%%ebp\n",register_name(e3,0));
+}
+
+
+void
+code_fix_frame_pointer(disp_offset) {
+    printf("\tlea %d(%%ebp),%%ebp\n",disp_offset);
+}
+
+
+void
+code_jmp(char *s) {
+    printf("\tjmp %s\n",s);
+}
+
+
+void
+code_indirect_jmp(int e2) {
+    printf("\tjmp *%s\n",register_name(e2,0));
+}
+
+void
+rindirect(int e1)   /* *(p +5 ) */
+{
+    char *op;
+    int e2,e3,byte;
+
+    op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl");
+    e3 = cadr(e2 = cadr(e1));
+    g_expr(e2);
+    printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0));
+}
+
+char *
+move(int byte)
+{
+    return byte?"movb":"movl";
+}
+
+void
+code_assign_gvar(int e2,int byte) {
+    if (byte) use_data_reg(creg,1);
+    printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),(char *)caddr(e2));
+}
+
+void
+code_assign_lvar(int e2,int byte) {
+    if (byte) use_data_reg(creg,1);
+    printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),e2);
+}
+
+void
+code_assign_register(int e2,int byte) {
+    printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0));
+}
+
+void
+code_assign(int e2,int byte) {
+    printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0));
+}
+
+
+void
+code_register_assop(int e2,int op,int byte) {
+    int reg;
+    int xreg = creg;
+    creg = reg = e2;
+    tosop(op,xreg);
+    creg = xreg;
+    printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0));
+}
+
+
+void
+code_assop(int op,int byte) {
+    char *xrn;
+    int xreg;
+    int edx = edx_setup();
+    xrn = register_name(xreg = emit_pop(0),0);       /* pop e3 value */
+    regv[xreg]=regs[xreg]=1;
+    printf("\tmovl %s,%s  # assop \n",register_name(creg,0),register_name(edx,0));
+    regv[edx]=1;
+    ld_indexx(byte,0,edx);
+    tosop(op,xreg);
+    printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0));
+    edx_cleanup();
+    emit_pop_free(xreg);
+}
+
+
+void
+tosop(int op,int oreg)
+{
+    int dx;
+    char *orn,*crn;
+
+    switch(op) {
+    case LSHIFT:
+    case ULSHIFT:
+	shift("sall",oreg);
+	return;
+    case RSHIFT:
+	shift("sarl",oreg);
+	return;
+    case URSHIFT:
+	shift("shrl",oreg);
+	return;
+    }
+    if(oreg==-1) {
+        printf("\tpopl %s\n",register_name(dreg,0));
+	oreg = dreg;
+	regv[dreg]=1;
+    }
+    regv[oreg]=1; regs[oreg]=1;
+    orn = register_name(oreg,0);
+    crn = register_name(creg,0);
+    switch(op) {
+    case ADD:
+	printf("\taddl %s,%s\n",orn,crn);
+	break;
+    case SUB:
+	printf("\tsubl %s,%s\n",orn,crn);
+	break;
+    case BAND: 
+	printf("\tandl %s,%s\n",orn,crn);
+	break;
+    case EOR: 
+	printf("\txorl %s,%s\n",orn,crn);
+	break;
+    case BOR:
+	printf("\torl %s,%s\n",orn,crn);
+	break;
+    case MUL:
+    case UMUL:
+	printf("\t%s %s,%s\n","imull",orn,crn);
+	break;
+    case DIV:
+    case UDIV:
+	use_register(creg,REG_EAX,1);
+	edx_setup();
+	orn = register_name(oreg,0);
+	if (op==DIV)
+	    printf("\tcltd\n\tdivl %s\n",orn);
+	else 
+	    printf("\txor %%edx,%%edx\n\tidivl %s\n",orn);
+	edx_cleanup();
+	break;
+    case MOD:
+    case UMOD:
+	use_register(creg,REG_EAX,1);
+	edx_setup();
+	orn = register_name(oreg,0);
+	if (op==DIV)
+	    printf("\tcltd\n\tdivl %s\n",orn);
+	else 
+	    printf("\txor %%edx,%%edx\n\tidivl %s\n",orn);
+        dx = virtual(REG_EDX);	
+	if (dx!=creg) {
+	    rname[dx]=rname[creg];
+	    rname[creg]=REG_EDX;
+	}
+	edx_cleanup();
+	break;
+    }
+    if (oreg!=dreg&&oreg>=0)
+	free_register(oreg);
+}
+
+static int edx_stack=0;
+
+int
+edx_setup()
+{
+    int edx_save;
+    /* make real EDX register empty */
+    if (free_register_count()<1) {
+        for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++);
+	printf("\tpushl %s\n",register_name(edx_save,0));
+        edx_stack = list3(edx_save,edx_stack,0);
+    } else {
+        edx_save = get_register();
+        edx_stack = list3(edx_save,edx_stack,1);
+    }
+    regv[edx_save]=0;
+    use_register(edx_save,REG_EDX,0);
+    return edx_save;
+}
+
+
+void
+edx_cleanup()
+{
+    if (caddr(edx_stack)==0) {
+	printf("\tpopl %s\n",register_name(car(edx_stack),0));
+    } else
+	free_register(car(edx_stack));
+    edx_stack = cadr(edx_stack);
+}
+
+void
+shift(char *op, int reg)
+{
+    if (reg>=0) {
+	use_register(reg,REG_ECX,1);
+    } else {
+	use_register(dreg,REG_ECX,0);
+	printf("\tpopl %%ecx\n");
+    }
+    printf("\t%s %%cl,%s\n",op,register_name(creg,0));
+}
+
+void
+ld_indexx(int byte, int n, int xreg)
+{	
+    char *op;
+
+    op = byte ? "movsbl" : "movl";
+    if (n) 
+	    printf("\t%s %d(%s),%s\n",op,n,register_name(xreg,0),register_name(creg,byte));
+    else
+	    printf("\t%s (%s),%s\n",op,register_name(xreg,0),register_name(creg,byte));
+}
+
+void
+cmpdimm(int e, int csreg)
+{
+    /* used in dosiwtch() */
+    use_register(creg,csreg,0);
+    printf("\tcmpl $%d,%s\n",e,register_name(creg,0));
+}
+
+void
+opening(char *filename)
+{
+    printf("\t.file \"%s\"\n",filename);
+    printf("\t.version\t\"01.01\"\n");
+    printf("gcc2_compiled.:\n");
+    printf(".text\n");
+    emit_init();
+}
+
+void
+closing(void)
+{
+    global_table();
+    printf("\t.ident \"Micro-C compiled\"\n");
+}
+
+void
+rexpr(int e1, int l1, char *s)
+{       
+    g_expr(list3(SUB,cadr(e1),caddr(e1)));
+    printf("\tj%s\t_%d\n",s,l1);
+}
+
+void
+jcond(int l, char cond)
+{       
+    printf("\tj%s\t_%d\n",cond?"ne":"e",l);
+}
+
+void
+jmp(int l)
+{       
+    control=0;
+    printf("\tjmp\t_%d\n",l);
+    /* align? */
+    /*
+      this is not allowed because of ? operator
+    regv[creg]=regv[dreg]=0; 
+    use_register(creg,REG_EAX,0);
+    use_register(dreg,REG_EBX,0);
+     */
+}
+
+void
+gen_comment(char *s)
+{
+     printf("## %s",s);
+}
+
+
+void
+code_enter(char *name)
+{
+    printf("\t.align 4\n");
+    if (stmode!=STATIC)
+	printf(".globl %s\n",name);
+    printf("\t.type\t%s,@function\n",name);
+    printf("%s:\n",name);
+}
+
+void
+code_enter1(int args)
+{
+    code_disp_label=fwdlabel();
+    printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label);
+
+    printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); 
+}
+
+void
+code_leave(char *name)
+{
+    printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset);
+    printf("_%d:\n",labelno);
+    printf("\t.size\t%s,_%d-%s\n",name,labelno,name);
+    local_table();
+    labelno++;
+    free_all_register();
+}
+
+void
+enter(char *name)
+{
+    printf("\t.align 2\n");
+    if (stmode!=STATIC)
+	printf(".globl %s\n",name);
+    printf("%s:\n",name);
+    printf("\t.type\t%s,@function\n",name);
+    printf("\tpushl %%ebp\n");
+    printf("\tmovl %%esp,%%ebp\n");
+    printf("\tpushl %%ebx\n");
+    printf("\tpushl %%esi\n");
+    printf("\tpushl %%edi\n");
+}
+
+void
+enter1()
+{
+    func_disp_label=fwdlabel();
+    printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); 
+    /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */
+}
+
+void
+leave(int control, char *name)
+{
+    if (control)
+	use_register(creg,REG_EAX,1);
+    if (retcont) {
+	if (control)
+	    jmp(retlabel);
+	fwddef(retcont);
+	use_register(creg,REG_EAX,0);
+	printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0));
+	/* printf("\tleave\n"); */
+    }
+    fwddef(retlabel);
+    /* use_register(creg,REG_EAX,0); too late */
+    /* if(disp) printf("\taddl $%d,%%esp\n",-disp);  */
+    printf("\tlea %d(%%ebp),%%esp\n",disp_offset);
+    printf("\tpopl %%edi\n");
+    printf("\tpopl %%esi\n");
+    printf("\tpopl %%ebx\n");
+    printf("\tleave\n");
+    printf("\tret\n");
+    printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset);
+    printf("_%d:\n",labelno);
+    printf("\t.size\t%s,_%d-%s\n",name,labelno,name);
+    local_table();
+    labelno++;
+    free_all_register();
+}
+
+
+void
+code_set_fixed_creg(int mode) {
+    use_register(creg,REG_EAX,mode);
+}
+
+void
+gen_gdecl(char *n, int gpc)
+{
+    /*
+    if (stmode!=STATIC)
+	printf(".globl %s\n",n); 
+     */
+}
+
+void 
+align(int t)
+{
+    if (t!=CHAR) {
+	if (data_alignment & 1)
+	    printf("\t.align 2\n");
+	data_alignment = 0;
+    }
+}
+
+void
+emit_data(int e, int t, NMTBL *n)
+{
+    int l;
+    char *name;
+    name = n->nm; 
+    if(mode!=GDECL)  { 
+	error(-1); return;
+    }
+    if (n->dsp != -1) {
+	n->dsp = -1;   /* initiallized flag */
+	printf(".globl\t%s\n",name);
+	data_mode(name);
+	align(t);
+	printf("%s:\n",name); 
+    } else {
+	data_mode(0);
+    }
+    if(car(e)==CONST) {       
+	if (t==CHAR) {
+	    printf("\t.byte %d\n",cadr(e));
+	    if (data_alignment>0)
+		data_alignment++;
+	    gpc += 1;
+	} else {
+	    printf("\t.long %d\n",cadr(e));
+	    gpc += size_of_int;
+	}
+    } else if(t!=CHAR) {       
+	gpc += size_of_int;
+	if(car(e)==ADDRESS&&car(cadr(e))==GVAR) {
+	    printf("\t.long %s\n",(char *)caddr(cadr(e)));
+	} else if(car(e)==FNAME) {
+	    printf("\t.long %s\n",((NMTBL *)cadr(e))->nm);
+	} else if(car(e)==STRING) {       
+	    if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) {
+		l = fwdlabel();
+		printf("\t.long _%d\n",l);
+		printf(".section\t.rodata\n");
+		printf("_%d:\n",l);
+		output_mode = RODATA_EMIT_MODE;
+	    }
+	    ascii((char *)cadr(e));
+	} else error(TYERR);
+    }
+}
+
+void
+emit_data_closing(NMTBL *n)
+{
+    int lb;
+    if (mode==GDECL) {
+	data_mode(0);
+	lb=fwdlabel();
+	printf("_%d:\n",lb);
+	printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm);
+    }
+}
+
+void
+global_table(void)
+{
+    NMTBL *n;
+    int init;
+    init=0;
+    for(n=ntable;n < &ntable[GSYMS];n++) {
+	if (n->sc == GVAR && n->dsp != -1) {
+	    /* n->dsp = -1 means initialized global */
+	    if (init==0) {
+		data_mode(0);
+		init=1;
+	    }
+	    printf(".comm %s,%d\n",n->nm,size(n->ty));
+	}
+    }
+}
+
+void
+local_table(void)
+{
+    NMTBL *n;
+    int init;
+    init=0;
+    /* static local variables */
+    for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) {
+	if (n->sc == GVAR) {
+	    if (init==0) {
+		data_mode(0);
+		init=1;
+	    }
+	    printf(".lcomm %s,%d\n",n->nm,size(n->ty));
+	}
+    }
+}
+
+void
+text_mode(void)
+{
+    if (output_mode!=TEXT_EMIT_MODE) {
+	printf(".text\n");
+	printf("\t.align 2\n");
+	output_mode = TEXT_EMIT_MODE;
+    }
+}
+
+void
+data_mode(char *name)
+{
+    if (output_mode!=DATA_EMIT_MODE) {
+	printf(".data\n");
+	output_mode = DATA_EMIT_MODE;
+    }
+    if (name)
+	printf("\t.type\t%s,@object\n",name);
+}
+
+int
+lvar(int l)
+{
+    if (fnptr->sc==CODE) {
+	return l+code_disp_offset;
+    } else if (l<0) {
+	return l+disp_offset;
+    } else {
+	return l+arg_offset;
+    }
+}
+
+/* end */