diff --git a/glide2x/h3/glide/src/makefile.linux b/glide2x/h3/glide/src/makefile.linux
index b951e7c..09434a3 100644
--- a/glide2x/h3/glide/src/makefile.linux
+++ b/glide2x/h3/glide/src/makefile.linux
@@ -112,6 +112,8 @@ override USE_FIFO = 1
 ifeq ($(USE_X86),1)
 CDEFS += -DGLIDE_DISPATCH_SETUP=1 -DGLIDE_DISPATCH_DOWNLOAD=1
 override USE_FIFO = 1
+CDEFS += -DHAVE_XDRAWTRI_ASM=1
+override USE_DRAWTRI_ASM = 1
 else
 CDEFS += -DGLIDE_USE_C_TRISETUP=1
 endif
@@ -192,14 +194,15 @@ GLIDE_OBJECTS = \
 	cpuid.o \
 	xtexdl_def.o
 
+ifeq ($(USE_DRAWTRI_ASM),1)
+GLIDE_OBJECTS += xdrawtri.o
+endif
 ifeq ($(USE_X86),1)
 GLIDE_OBJECTS += \
-	xdraw2_def.o \
-	xdraw3_def.o
+	xdraw2_def.o
 ifeq ($(USE_3DNOW),1)
 GLIDE_OBJECTS += \
 	xdraw2_3dnow.o \
-	xdraw3_3dnow.o \
 	xtexdl_3dnow.o
 endif
 else
@@ -267,14 +270,12 @@ cpuid.o: cpudtect.asm
 	$(AS) -o $@ $(ASFLAGS) $<
 xdraw2_def.o: xdraw2.asm
 	$(AS) -o $@ $(ASFLAGS) $<
-xdraw3_def.o: xdraw3.asm
-	$(AS) -o $@ $(ASFLAGS) $<
 xdraw2_3dnow.o: xdraw2.asm
 	$(AS) -o $@ $(ASFLAGS) -DGL_AMD3D=1 $<
-xdraw3_3dnow.o: xdraw3.asm
-	$(AS) -o $@ $(ASFLAGS) -DGL_AMD3D=1 $<
 xtexdl_3dnow.o: xtexdl.asm
 	$(AS) -o $@ $(ASFLAGS) -DGL_AMD3D=1 $<
+xdrawtri.o: xdrawtri.asm
+	$(AS) -o $@ $(ASFLAGS) $<
 
 cpuid.lo: cpuid.o
 	$(CP) $< $@
@@ -288,6 +289,8 @@ xdraw3_3dnow.lo: xdraw3_3dnow.o
 	$(CP) $< $@
 xtexdl_3dnow.lo: xtexdl_3dnow.o
 	$(CP) $< $@
+xdrawtri.lo: xdrawtri.o
+	$(CP) $< $@
 
 $(GLIDE_OBJECTS): fxinline.h fxgasm.h
 
diff --git a/glide2x/h3/glide/src/xdrawtri.S b/glide2x/h3/glide/src/xdrawtri.S
new file mode 100644
index 0000000..ffc4a7a
--- /dev/null
+++ b/glide2x/h3/glide/src/xdrawtri.S
@@ -0,0 +1,38 @@
+/*
+ * THIS SOFTWARE IS SUBJECT TO COPYRIGHT PROTECTION AND IS OFFERED ONLY
+ * PURSUANT TO THE 3DFX GLIDE GENERAL PUBLIC LICENSE. THERE IS NO RIGHT
+ * TO USE THE GLIDE TRADEMARK WITHOUT PRIOR WRITTEN PERMISSION OF 3DFX
+ * INTERACTIVE, INC. A COPY OF THIS LICENSE MAY BE OBTAINED FROM THE
+ * DISTRIBUTOR OR BY CONTACTING 3DFX INTERACTIVE INC(info@3dfx.com).
+ * THIS PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESSED OR IMPLIED. SEE THE 3DFX GLIDE GENERAL PUBLIC LICENSE FOR A
+ * FULL TEXT OF THE NON-WARRANTY PROVISIONS.
+ *
+ * USE, DUPLICATION OR DISCLOSURE BY THE GOVERNMENT IS SUBJECT TO
+ * RESTRICTIONS AS SET FORTH IN SUBDIVISION (C)(1)(II) OF THE RIGHTS IN
+ * TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 252.227-7013,
+ * AND/OR IN SIMILAR OR SUCCESSOR CLAUSES IN THE FAR, DOD OR NASA FAR
+ * SUPPLEMENT. UNPUBLISHED RIGHTS RESERVED UNDER THE COPYRIGHT LAWS OF
+ * THE UNITED STATES.
+ *
+ * COPYRIGHT 3DFX INTERACTIVE, INC. 1999, ALL RIGHTS RESERVED
+ */
+
+/* Adapted from gdraw.c:grDrawTriangle() for gas */
+
+#include "fxgasm.h"
+
+.extern _GlideRoot
+
+.text
+
+.p2align 4,,15
+.globl grDrawTriangle
+.type  grDrawTriangle,@function
+grDrawTriangle:
+/*movl (_GlideRoot+curGC),%edx
+  movl kTriProcOffset(%edx),%eax*/
+  movl (_GlideRoot + curGC),%eax
+  jmp  *kTriProcOffset(%eax)
+
+.p2align 4,,15
diff --git a/glide2x/h3/glide/src/xdrawtri.asm b/glide2x/h3/glide/src/xdrawtri.asm
new file mode 100644
index 0000000..767f417
--- /dev/null
+++ b/glide2x/h3/glide/src/xdrawtri.asm
@@ -0,0 +1,46 @@
+;; THIS SOFTWARE IS SUBJECT TO COPYRIGHT PROTECTION AND IS OFFERED ONLY
+;; PURSUANT TO THE 3DFX GLIDE GENERAL PUBLIC LICENSE. THERE IS NO RIGHT
+;; TO USE THE GLIDE TRADEMARK WITHOUT PRIOR WRITTEN PERMISSION OF 3DFX
+;; INTERACTIVE, INC. A COPY OF THIS LICENSE MAY BE OBTAINED FROM THE
+;; DISTRIBUTOR OR BY CONTACTING 3DFX INTERACTIVE INC(info@3dfx.com).
+;; THIS PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
+;; EXPRESSED OR IMPLIED. SEE THE 3DFX GLIDE GENERAL PUBLIC LICENSE FOR A
+;; FULL TEXT OF THE NON-WARRANTY PROVISIONS.
+;;
+;; USE, DUPLICATION OR DISCLOSURE BY THE GOVERNMENT IS SUBJECT TO
+;; RESTRICTIONS AS SET FORTH IN SUBDIVISION (C)(1)(II) OF THE RIGHTS IN
+;; TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 252.227-7013,
+;; AND/OR IN SIMILAR OR SUCCESSOR CLAUSES IN THE FAR, DOD OR NASA FAR
+;; SUPPLEMENT. UNPUBLISHED RIGHTS RESERVED UNDER THE COPYRIGHT LAWS OF
+;; THE UNITED STATES.
+;;
+;; COPYRIGHT 3DFX INTERACTIVE, INC. 1999, ALL RIGHTS RESERVED
+
+;; Adapted from gdraw.c:grDrawTriangle() for nasm
+
+%include "xos.inc"
+
+%include "fxgasm.h"
+
+extrn   _GlideRoot
+
+segment SEG_TEXT
+
+align 16
+proc grDrawTriangle, 12
+
+;;mov edx, dword [_GlideRoot+curGC]
+;;mov eax, dword [edx+kTriProcOffset]
+  mov eax, dword [_GlideRoot+curGC]
+  jmp [eax + kTriProcOffset]
+endp
+  align 16
+
+%if XOS == XOS_WIN32
+%ifdef __MINGW32__
+; GNU LD fails with '_' prefix
+export  grDrawTriangle@12
+%else
+export _grDrawTriangle@12
+%endif
+%endif ; _WIN32