From ca9a6feeb0339411c6e14cf43ee8bf007910558f Mon Sep 17 00:00:00 2001
From: bal <none@none>
Date: Fri, 12 Apr 1985 15:47:30 +0000
Subject: [PATCH] floating point stuff added

---
 mach/m68k2/cg/mach.c |  72 ++++++++++++++++----
 mach/m68k2/cg/table  | 157 +++++++++++++++++++++++++++++++++++++------
 2 files changed, 196 insertions(+), 33 deletions(-)

diff --git a/mach/m68k2/cg/mach.c b/mach/m68k2/cg/mach.c
index 2b539e4d2..65fb301e4 100644
--- a/mach/m68k2/cg/mach.c
+++ b/mach/m68k2/cg/mach.c
@@ -23,6 +23,19 @@ static char rcsid[] = "$Header$";
  * machine dependent back end routines for the Motorola 68000
  */
 
+#define IEEEFLOAT
+
+#ifdef IEEEFLOAT
+#include "FP.h"
+#include "trp.c"
+#include "fcompact.c"
+#include "dbl_extract.c"
+#ifdef	PRT_EXP_DEBUG
+#include "prt_extend.c"
+#endif
+#endif IEEEFLOAT
+
+
 con_part(sz,w) register sz; word w; {
 
 	while (part_size % sz)
@@ -48,18 +61,53 @@ con_mult(sz) word sz; {
 	fprintf(codefile,".long %s\n",str);
 }
 
-con_float() {
-
-static int been_here;
-	if (argval != 4 && argval != 8)
-		fatal("bad fcon size");
-	fprintf(codefile,".long\t");
-	if (argval == 8)
-		fprintf(codefile,"F_DUM,");
-	fprintf(codefile,"F_DUM\n");
-	if ( !been_here++)
-	{
-	fprintf(stderr,"Warning : dummy float-constant(s)\n");
+#ifdef IEEEFLOAT
+dbl_adjust(fl)
+my_dbl	*fl;
+{
+	EXTEND	buf;
+
+		/* special routine to strip SGL_BIAS */
+	dbl_extract(fl,&buf);
+		/* standard routine to add DBL_BIAS */
+	fcompact(&buf,fl,sizeof(double));
+}
+#endif IEEEFLOAT
+
+con_float()
+{
+	register word	sz;
+	register long	*l;
+#ifdef IEEEFLOAT
+	register my_dbl	*md;
+#endif IEEEFLOAT
+		 double	d;
+	char	mesg[128];
+
+	sz = argval;
+	if (sz!= 4 && sz!= 8) {
+		sprintf(mesg,"con_float(): bad fcon size %d %D\nstr: %s\n\0",
+				sz,sz,str);
+		fatal(mesg);
+	}
+
+	d = atof(str);
+	l = (long *) &d;
+
+#ifdef IEEEFLOAT
+	if (sz == 8)	{
+		/* ATOF() RETURNS THE PROPER FORMAT FOR A FLOAT */
+		/* BUT NOT FOR A DOUBLE. CORRECT THE FORMAT.	*/
+		md = (my_dbl *) &d;
+		dbl_adjust(md);
+	}
+#endif IEEEFLOAT
+
+	while ( sz ) {
+		fprintf(codefile,"\t.word 0x%x,0x%x !float test %s\n",
+			(int)(*l)&0xFFFF,(int)(*l>>16)&0xFFFF,str);
+		sz -=4 ;
+		l++;
 	}
 }
 
diff --git a/mach/m68k2/cg/table b/mach/m68k2/cg/table
index 068d2faac..2a327bf7b 100644
--- a/mach/m68k2/cg/table
+++ b/mach/m68k2/cg/table
@@ -1035,6 +1035,50 @@ adu | | | | adi $1 |
 sbu | | | | sbi $1 |
 slu | | | | sli $1 |
 
+/* Floating point stuff */
+adf $1==4	| |
+			remove(ALL)
+			"jsr .adf4"		    | | asp 8 lfr 4 |
+adf $1==8	| |
+			remove(ALL)
+			"jsr .adf8"		    | | asp 16 lfr 4 loi 8 |
+sbf $1==4	| |
+			remove(ALL)
+			"jsr .sbf4"		    | | asp 8 lfr 4 |
+sbf $1==8	| |
+			remove(ALL)
+			"jsr .sbf8"		    | | asp 16 lfr 4 loi 8 |
+mlf $1==4	| |
+			remove(ALL)
+			"jsr .mlf4"		    | | asp 8 lfr 4 |
+mlf $1==8	| |
+			remove(ALL)
+			"jsr .mlf8"		    | | asp 16 lfr 4 loi 8 |
+dvf $1==4	| |
+			remove(ALL)
+			"jsr .dvf4"		    | | asp 8 lfr 4 |
+dvf $1==8	| |
+			remove(ALL)
+			"jsr .dvf8"		    | | asp 16 lfr 4 loi 8 |
+ngf $1==4	| |
+			remove(ALL)
+			"jsr .ngf4"		    | | asp 4 lfr 4 |
+ngf $1==8	| |
+			remove(ALL)
+			"jsr .ngf8"		    |  |  asp 16 lfr 4 loi 8 |
+fif $1==4	| |
+			remove(ALL)
+			"jsr .fif4"		    |  | asp 16 lfr 4 loi 8 |
+fif $1==8	| |
+			remove(ALL)
+			"jsr .fif8"		    |  | asp 16 lfr 4 loi 16 |
+fef $1==4	| |
+			remove(ALL)
+			"jsr .fef4"		    |  |  asp 4 lfr 4 loi 8 |
+fef $1==8	| |
+			remove(ALL)
+			"jsr .fef8"		    |  |  asp 8 lfr 4 loi 12 |
+
 
 
 /* G R O U P  VI :   P O I N T E R  A R I T H M E T I C  */
@@ -1249,6 +1293,7 @@ zer $1 > 12  |	|	remove(ALL)
 		"1:"
 		"clr -(sp)"
 		"dbf %[a],1b"		| | |
+zrf		| |			| |	  zer $1 |
 
 
 
@@ -1298,6 +1343,88 @@ loc loc ciu $1==4 && $2==2 | DATAREG4	| |  %[1.1] | |
 loc loc cui $1==4 && $2==2 | DATAREG4	| |  %[1.1] | |
 ...			   | ANY	| |  | |
 
+/* Floating point stuff */
+
+loc loc cif	$1==2 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cif4"		      | | asp 4 lfr 4 |
+loc loc cif	$1==2 && $2==8 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cif8"		  | | asp 4 lfr 4 loi 8 |
+loc loc cif	$1==4 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cif4"		      | | asp 6 lfr 4 |
+loc loc cif	$1==4 && $2==8 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cif8"		  | | asp 6 lfr 4 loi 8 |
+loc loc cuf	$1==2 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cuf4"		      | | asp 4 lfr 4 |
+loc loc cuf	$1==2 && $2==8 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cuf8"		  | | asp 4 lfr 4 loi 8 |
+loc loc cuf	$1==4 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cuf4"		      | | asp 6 lfr 4 |
+loc loc cuf	$1==4 && $2==8 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"jsr .cuf8"		  | | asp 6 lfr 4 loi 8 |
+loc loc cfi	$1==4 && $2==2 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfi"		      | | asp 8 lfr 2 |
+loc loc cfi	$1==4 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfi"		      | | asp 8 lfr 4 |
+loc loc cfi	$1==8 && $2==2 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfi"		      | | asp 12 lfr 2 |
+loc loc cfi	$1==8 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfi"		      | | asp 12 lfr 4 |
+loc loc cfu	$1==4 && $2==2 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfu"		      | | asp 8 lfr 2 |
+loc loc cfu	$1==4 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfu"		      | | asp 8 lfr 4 |
+loc loc cfu	$1==8 && $2==2 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfu"		      | | asp 12 lfr 2 |
+loc loc cfu	$1==8 && $2==4 | |
+			remove(ALL)
+			"move.w #$1,-(sp)"
+			"move.w #$2,-(sp)"
+			"jsr .cfu"		      | | asp 12 lfr 4 |
+loc loc cff	$1==8 && $2==4 | |
+			remove(ALL)
+			"jsr .cff4"		      | | asp 8 lfr 4 |
+loc loc cff	$1==4 && $2==8 | |
+			remove(ALL)
+			"jsr .cff8"		| | asp 4 lfr 4 loi 8 |
+
+
 /* G R O U P  IX :   L O G I C A L  */
 
 and defined($1) && $1 == 2 | ANY DATASCR |
@@ -1727,6 +1854,15 @@ cms !defined($1) | ANY |	remove(ALL)
 cmp | |				remove(ALL)
 				"jsr .cmp"
 						| D1 | |
+/* floating point */
+
+cmf $1==4	| |
+			remove(ALL)
+			"jsr .cmf4"		       | | asp 8 lfr 2 |
+cmf $1==8	| |
+			remove(ALL)
+			"jsr .cmf8"		       | | asp 16 lfr 2 |
+
 
 cmi tlt and $1==2 && $3==2 | ANY DATAREG DATASCR |
 				"cmp %[1],%[2]"
@@ -2652,27 +2788,6 @@ str $1 == 2 | |			remove(ALL)
 trp | STACK |			"jsr .trp"		| | |
 
 
-/* For several floating point instructions we generate an illegal 
- * instruction trap.
- */
-
-adf | | | | loc 18 trp |
-sbf | | | | loc 18 trp |
-mlf | | | | loc 18 trp |
-dvf | | | | loc 18 trp |
-ngf | | | | loc 18 trp |
-fef | | | | loc 18 trp |
-fif | | | | loc 18 trp |
-zrf | | | | loc 18 trp |
-cfi | | | | loc 18 trp |
-cif | | | | loc 18 trp |
-cuf | | | | loc 18 trp |
-cff | | | | loc 18 trp |
-cfu | | | | loc 18 trp |
-cmf | | | | loc 18 trp |
-
-
-
 /* C O E R C I O N S */
 
 
-- 
2.34.1