From: Alan Cox <alan@linux.intel.com>
Date: Sat, 6 Jun 2015 13:56:05 +0000 (+0100)
Subject: Library: Add fixed ashlsi3 code to the C library
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=7166fa951e3ec2d70941e887eb535228ec575ea6;p=FUZIX.git

Library: Add fixed ashlsi3 code to the C library
---

diff --git a/Library/libs/Makefile.6809 b/Library/libs/Makefile.6809
index 7c96c22a..6f3ab527 100644
--- a/Library/libs/Makefile.6809
+++ b/Library/libs/Makefile.6809
@@ -4,12 +4,12 @@ AR = m6809-unknown-ar
 PLATFORM = 6809
 export PLATFORM
 CC_OPT = -c -Os -I../include -I../include/6502
-# for stuff that gives sdcc nightmares
+# for stuff that gives gcc nightmares
 CC_NOOPT = $(CC_OPT)
 ASM_OPT = -o
 SRC_CRT0 = crt0_$(PLATFORM).s
 OBJ_CRT0 = $(SRC_CRT0:.s=.o)
-SRC_ASM = setjmp_6809.s
+SRC_ASM = setjmp_6809.s ashlsi3_6809.s
 OBJ_ASM = $(SRC_ASM:.s=.o)
 SRC_C =  __argv.c abort.c asctime.c assert.c atexit.c
 SRC_C += bcmp.c bcopy.c bsearch.c bzero.c calloc.c cfree.c clock.c closedir.c
diff --git a/Library/libs/ashlsi3_6809.s b/Library/libs/ashlsi3_6809.s
new file mode 100644
index 00000000..86dd0e09
--- /dev/null
+++ b/Library/libs/ashlsi3_6809.s
@@ -0,0 +1,47 @@
+	.globl	___ashlsi3
+
+	.area .text
+
+___ashlsi3:
+	pshs	u
+
+	; FIXME temporary hack until we fix gcc-6809 or our use of it
+	; the argument passing doesn't match so we'll mangle it
+	ldu 4,s
+	stu ,x
+	ldu 6,s
+	stu 2,x
+	ldb 9,s
+
+	cmpb	#16
+	blt	try8
+	subb	#16
+	; Shift by 16
+	ldu	2,x
+	stu	,x
+	ldu	#0
+	stu	2,x
+try8:
+	cmpb	#8
+	blt	try_rest
+	subb	#8
+	; Shift by 8
+	ldu	1,x
+	stu	,x
+	lda	3,x
+	sta	2,x
+	clr	3,x
+
+try_rest:
+	tstb
+	beq	done
+do_rest:
+	; Shift by 1
+	asl	3,x
+	rol	2,x
+	rol	1,x
+	rol	,x
+	decb
+	bne	do_rest
+done:
+	puls	u,pc