From: Tormod Volden <debian.tormod@gmail.com>
Date: Fri, 24 Apr 2015 11:08:48 +0000 (+0200)
Subject: lowlevel-6809.s: ashlsi3 workaround
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=bfa7e2bd24c5f54d8f2a36b039538493ecaca2e3;p=FUZIX.git

lowlevel-6809.s: ashlsi3 workaround

When calling ashlsi3 (taken from the libgcc source) the arguments
are not set up on the stack as the ashlsi3 code expects.

It might be a bug in gcc-6809, but until we get this sorted out,
use this little prologue to have the function work correctly.

This was the last hurdle to get a relatively usable system going.

Signed-off-by: Tormod Volden <debian.tormod@gmail.com>
---

diff --git a/Kernel/lowlevel-6809.s b/Kernel/lowlevel-6809.s
index 2c1fbc3b..899b20d8 100644
--- a/Kernel/lowlevel-6809.s
+++ b/Kernel/lowlevel-6809.s
@@ -552,6 +552,15 @@ _ashlhi3_2:
 
 ___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