From e61875cfadc6ac33302d69474209fd215b9f6842 Mon Sep 17 00:00:00 2001
From: John Tsiombikas <nuclear@member.fsf.org>
Date: Sat, 10 Feb 2018 21:10:26 +0200
Subject: [PATCH] - added rules for building asm code in the gcc makefiles -
 fixed missing parenthesis in PACK_RGB16

---
 GNUmakefile   |    3 +++
 Makefile.dj   |    3 +++
 src/gfxutil.h |    4 +++-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/GNUmakefile b/GNUmakefile
index de6b64a..d6c67d1 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -11,6 +11,9 @@ LDFLAGS = -Llibs/imago -Llibs/mikmod -limago -lmikmod `sdl-config --libs` -lm
 $(bin): $(obj) imago mikmod
 	$(CC) -o $@ $(obj) $(LDFLAGS)
 
+%.o: %.asm
+	nasm -f elf -o $@ $<
+
 -include $(dep)
 
 %.d: %.c
diff --git a/Makefile.dj b/Makefile.dj
index 4b3f7a7..c2ad183 100644
--- a/Makefile.dj
+++ b/Makefile.dj
@@ -22,6 +22,9 @@ LDFLAGS = libs/imago/imago.dja libs/oldmik/mikmod.dja
 $(bin): $(obj) imago mikmod
 	$(CC) -o $@ -Wl,-Map=ld.map $(obj) $(LDFLAGS)
 
+%.cof: %.asm
+	nasm -f coff -o $@ $<
+
 -include $(dep)
 
 %.cof: %.c
diff --git a/src/gfxutil.h b/src/gfxutil.h
index 15f8b66..c0a1fde 100644
--- a/src/gfxutil.h
+++ b/src/gfxutil.h
@@ -4,7 +4,9 @@
 #include "inttypes.h"
 
 #define PACK_RGB16(r, g, b) \
-	(((r) << 8) & 0xf800) | (((g) << 3) & 0x7e0) | (((b) >> 3) & 0x1f)
+	((((uint16_t)(r) << 8) & 0xf800) | \
+	 (((uint16_t)(g) << 3) & 0x7e0) | \
+	 (((uint16_t)(b) >> 3) & 0x1f))
 
 #define UNPACK_R16(c)	(((c) >> 8) & 0xf8)
 #define UNPACK_G16(c)	(((c) >> 3) & 0xfc)
-- 
1.7.10.4