From: Anthony Green <green@moxielogic.com>
Date: Mon, 7 Jan 2013 11:14:53 +0000 (-0500)
Subject: m68k fixes for signed 8 and 16-bit calls.
X-Git-Tag: v3.0.12~54
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8f4772f383abd71cfa141c8a70ba11c1aa4ebe2c;p=platform%2Fupstream%2Flibffi.git

m68k fixes for signed 8 and 16-bit calls.
---

diff --git a/ChangeLog b/ChangeLog
index a5885dd..42c6397 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-01-07  Thorsten Glaser <tg@mirbsd.org>
+
+	* src/m68k/ffi.c (CIF_FLAGS_SINT8, CIF_FLAGS_SINT16): Define.
+	(ffi_prep_cif_machdep): Fix 8-bit and 16-bit signed calls.
+	* src/m68k/sysv.S (ffi_call_SYSV, ffi_closure_SYSV): Ditto.
+
 2013-01-04  Anthony Green  <green@moxielogic.com>
 
 	* Makefile.am (AM_CFLAGS): Don't automatically add -fexceptions
diff --git a/src/m68k/ffi.c b/src/m68k/ffi.c
index 37a0784..0dee938 100644
--- a/src/m68k/ffi.c
+++ b/src/m68k/ffi.c
@@ -123,6 +123,8 @@ ffi_prep_args (void *stack, extended_cif *ecif)
 #define CIF_FLAGS_POINTER	32
 #define CIF_FLAGS_STRUCT1	64
 #define CIF_FLAGS_STRUCT2	128
+#define CIF_FLAGS_SINT8		256
+#define CIF_FLAGS_SINT16	512
 
 /* Perform machine dependent cif processing */
 ffi_status
@@ -200,6 +202,14 @@ ffi_prep_cif_machdep (ffi_cif *cif)
       cif->flags = CIF_FLAGS_DINT;
       break;
 
+    case FFI_TYPE_SINT16:
+      cif->flags = CIF_FLAGS_SINT16;
+      break;
+
+    case FFI_TYPE_SINT8:
+      cif->flags = CIF_FLAGS_SINT8;
+      break;
+
     default:
       cif->flags = CIF_FLAGS_INT;
       break;
diff --git a/src/m68k/sysv.S b/src/m68k/sysv.S
index f6f4ef9..9504c6a 100644
--- a/src/m68k/sysv.S
+++ b/src/m68k/sysv.S
@@ -2,9 +2,10 @@
 	
    sysv.S - Copyright (c) 2012 Alan Hourihane
 	    Copyright (c) 1998, 2012 Andreas Schwab
-	    Copyright (c) 2008 Red Hat, Inc. 
-   
-   m68k Foreign Function Interface 
+	    Copyright (c) 2008 Red Hat, Inc.
+	    Copyright (c) 2012 Thorsten Glaser
+
+   m68k Foreign Function Interface
 
    Permission is hereby granted, free of charge, to any person obtaining
    a copy of this software and associated documentation files (the
@@ -168,8 +169,22 @@ retstruct1:
 
 retstruct2:
 	btst	#7,%d2
-	jbeq	noretval
+	jbeq	retsint8
 	move.w	%d0,(%a1)
+	jbra	epilogue
+
+retsint8:
+	btst	#8,%d2
+	jbeq	retsint16
+	extb.l	%d0
+	move.l	%d0,(%a1)
+	jbra	epilogue
+
+retsint16:
+	btst	#9,%d2
+	jbeq	noretval
+	ext.l	%d0
+	move.l	%d0,(%a1)
 
 noretval:
 epilogue:
@@ -201,8 +216,10 @@ CALLFUNC(ffi_closure_SYSV):
 	lsr.l	#1,%d0
 	jne	1f
 	jcc	.Lcls_epilogue
+	| CIF_FLAGS_INT
 	move.l	-12(%fp),%d0
 .Lcls_epilogue:
+	| no CIF_FLAGS_*
 	unlk	%fp
 	rts
 1:
@@ -210,6 +227,7 @@ CALLFUNC(ffi_closure_SYSV):
 	lsr.l	#2,%d0
 	jne	1f
 	jcs	.Lcls_ret_float
+	| CIF_FLAGS_DINT
 	move.l	(%a0)+,%d0
 	move.l	(%a0),%d1
 	jra	.Lcls_epilogue
@@ -224,6 +242,7 @@ CALLFUNC(ffi_closure_SYSV):
 	lsr.l	#2,%d0
 	jne	1f
 	jcs	.Lcls_ret_ldouble
+	| CIF_FLAGS_DOUBLE
 #if defined(__MC68881__) || defined(__HAVE_68881__)
 	fmove.d	(%a0),%fp0
 #else
@@ -242,17 +261,31 @@ CALLFUNC(ffi_closure_SYSV):
 	jra	.Lcls_epilogue
 1:
 	lsr.l	#2,%d0
-	jne	.Lcls_ret_struct2
+	jne	1f
 	jcs	.Lcls_ret_struct1
+	| CIF_FLAGS_POINTER
 	move.l	(%a0),%a0
 	move.l	%a0,%d0
 	jra	.Lcls_epilogue
 .Lcls_ret_struct1:
 	move.b	(%a0),%d0
 	jra	.Lcls_epilogue
-.Lcls_ret_struct2:
+1:
+	lsr.l	#2,%d0
+	jne	1f
+	jcs	.Lcls_ret_sint8
+	| CIF_FLAGS_STRUCT2
 	move.w	(%a0),%d0
 	jra	.Lcls_epilogue
+.Lcls_ret_sint8:
+	move.l	(%a0),%d0
+	extb.l	%d0
+	jra	.Lcls_epilogue
+1:
+	| CIF_FLAGS_SINT16
+	move.l	(%a0),%d0
+	ext.l	%d0
+	jra	.Lcls_epilogue
 	CFI_ENDPROC()
 
 	.size	CALLFUNC(ffi_closure_SYSV),.-CALLFUNC(ffi_closure_SYSV)