Added head_em.s for Sun floating point emulation

mach/sun3/libce/.distr

@@ -19,3 +19,4 @@ mlf8.s
 sbf4.s
 sbf8.s
 vars.s
+head_em.s

mach/sun3/libce/Makefile

@@ -9,7 +9,8 @@ FOBJ =	adf4.o adf8.o cff.o cfi.o cfu.o cif.o cmf4.o cmf8.o cuf.o dvf4.o \
 	dvf8.o fef4.o fef8.o fif4.o fif8.o mlf4.o mlf8.o sbf4.o sbf8.o vars.o
 
 OBJ =	$(EMOBJ) $(FOBJ)
-all:	libext.a
+
+all:	libext.a head_em.sun.o
 
 .s.o:
 	sun3 -c $*.s
@@ -19,11 +20,16 @@ libext.a:	$(OBJ)
 	ar rv libext.a $(OBJ)
 	ranlib libext.a
 
+head_em.sun.o:	head_em.o
+	../../../lib/sun3/cv -u head_em.o head_em.sun.o
+
 install:	all
 	../../install libext.a tail_ext
+	../../install head_em.sun.o head_em.sun
 
 cmp:	all
 	-../../compare libext.a tail_ext
+	-../../compare head_em.sun.o head_em.sun
 
 clean:
 	rm -f *.[oa]

mach/sun3/libce/head_em.s

@@ -0,0 +1,71 @@
+.define .lino,.filn
+.define EXIT
+.define	begtext,begdata,begbss
+.define	EARRAY,ERANGE,ESET,EIDIVZ,EHEAP,EILLINS,ECASE,EBADGTO
+.define	hol0,.reghp,.limhp,.trpim,.trppc
+.define fsoft_used,start_float
+.sect .text
+.sect .rom
+.sect .data
+.sect .bss
+
+
+
+! runtime startof for 68020 machine
+
+
+LINO_AD	= 0
+FILN_AD	= 4
+
+EARRAY	= 0
+ERANGE	= 1
+ESET	= 2
+EIDIVZ	= 6
+EHEAP	= 17
+EILLINS	= 18
+ECASE	= 20
+EBADGTO = 27
+
+	.sect .text
+begtext:
+	move.l	(sp),d2
+	lea	(4,sp),a0
+	move.l	d2,d1
+	add.l	#1,d1
+	asl.l	#2,d1
+	move.l	a0,a1
+	add.l	d1,a1
+	pea	(a1)
+	pea	(a0)
+	move.l	d2,-(sp)
+	move.l	#0,a6
+	jsr	(fsoft_used)
+	jsr	(_m_a_i_n)
+	move.l	d0,(sp)		! no stack cleanup needed
+EXIT:
+	jsr	(_exit)
+
+fsoft_used:
+start_float:
+	jmp	(_finitfp_)
+
+	.sect .data
+begdata:
+	.data4 0		! may be at virtual address 0 with no problem
+hol0:
+.lino:
+	.data4	0	! lino
+.filn:
+	.data4	0	! filn
+.reghp:
+	.data4	_end
+.limhp:
+	.data4	_end
+.trppc:
+	.data4	0
+.trpim:
+	.data4	0	! USED TO BE 2 BYTES; IS THIS RIGHT?
+
+
+	.sect .bss
+begbss: !initialization is not needed because ALL entries are in zero space!