diff --git a/Makefile b/Makefile
index 31f189d..30d0c1d 100644
--- a/Makefile
+++ b/Makefile
@@ -109,6 +109,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/src/arch/sparc.h \
 		$(PACKAGE)-$(VERSION)/src/arch/sparc.ins \
 		$(PACKAGE)-$(VERSION)/src/arch/sparc.reg \
+		$(PACKAGE)-$(VERSION)/src/arch/yasep.h \
 		$(PACKAGE)-$(VERSION)/src/arch/yasep.ins \
 		$(PACKAGE)-$(VERSION)/src/arch/yasep.reg \
 		$(PACKAGE)-$(VERSION)/src/arch/project.conf \
diff --git a/src/arch/Makefile b/src/arch/Makefile
index 6de890d..04faf97 100644
--- a/src/arch/Makefile
+++ b/src/arch/Makefile
@@ -199,13 +199,13 @@ sparc.o: sparc.c common.ins null.ins sparc.h sparc.ins sparc.reg
 sparc64.o: sparc64.c common.ins null.ins sparc.h sparc.ins sparc.reg
 	$(CC) $(sparc64_CFLAGS) -c sparc64.c
 
-yasep.o: yasep.c common.ins null.ins yasep.ins yasep.reg
+yasep.o: yasep.c common.ins null.ins yasep.h yasep.ins yasep.reg
 	$(CC) $(yasep_CFLAGS) -c yasep.c
 
-yasep16.o: yasep16.c common.ins null.ins yasep.ins yasep.reg
+yasep16.o: yasep16.c common.ins null.ins yasep.c yasep.h yasep.ins yasep.reg
 	$(CC) $(yasep16_CFLAGS) -c yasep16.c
 
-yasep32.o: yasep32.c common.ins null.ins yasep.ins yasep.reg
+yasep32.o: yasep32.c common.ins null.ins yasep.c yasep.h yasep.ins yasep.reg
 	$(CC) $(yasep32_CFLAGS) -c yasep32.c
 
 clean:
diff --git a/src/arch/project.conf b/src/arch/project.conf
index 82068f8..aa82c30 100644
--- a/src/arch/project.conf
+++ b/src/arch/project.conf
@@ -2,7 +2,7 @@ targets=amd64,arm,armeb,armel,dalvik,i386,i386_real,i486,i586,i686,java,mips,mip
 cppflags_force=-I ../../include
 cflags_force=-W `pkg-config --cflags libSystem`
 cflags=-Wall -g -O2 -fPIC -pedantic
-dist=Makefile,amd64.ins,amd64.reg,arm.h,arm.ins,arm.reg,common.ins,dalvik.ins,dalvik.reg,i386.h,i386.ins,i386.reg,i486.ins,i586.ins,i686.ins,i686.reg,mips.h,mips.ins,mips.reg,null.ins,sparc.h,sparc.ins,sparc.reg,yasep.ins,yasep.reg
+dist=Makefile,amd64.ins,amd64.reg,arm.h,arm.ins,arm.reg,common.ins,dalvik.ins,dalvik.reg,i386.h,i386.ins,i386.reg,i486.ins,i586.ins,i686.ins,i686.reg,mips.h,mips.ins,mips.reg,null.ins,sparc.h,sparc.ins,sparc.reg,yasep.h,yasep.ins,yasep.reg
 
 [amd64]
 type=plugin
@@ -138,7 +138,7 @@ sources=yasep.c
 install=$(LIBDIR)/Asm/arch
 
 [yasep.c]
-depends=common.ins,null.ins,yasep.ins,yasep.reg
+depends=common.ins,null.ins,yasep.h,yasep.ins,yasep.reg
 
 [yasep16]
 type=plugin
@@ -146,7 +146,7 @@ sources=yasep16.c
 install=$(LIBDIR)/Asm/arch
 
 [yasep16.c]
-depends=common.ins,null.ins,yasep.ins,yasep.reg
+depends=common.ins,null.ins,yasep.c,yasep.h,yasep.ins,yasep.reg
 
 [yasep32]
 type=plugin
@@ -154,4 +154,4 @@ sources=yasep32.c
 install=$(LIBDIR)/Asm/arch
 
 [yasep32.c]
-depends=common.ins,null.ins,yasep.ins,yasep.reg
+depends=common.ins,null.ins,yasep.c,yasep.h,yasep.ins,yasep.reg
diff --git a/src/arch/yasep.c b/src/arch/yasep.c
index a9de1e5..93631f6 100644
--- a/src/arch/yasep.c
+++ b/src/arch/yasep.c
@@ -27,13 +27,6 @@
 
 /* yasep */
 /* private */
-/* types */
-struct _AsmArchPlugin
-{
-	AsmArchPluginHelper * helper;
-};
-
-
 /* variables */
 /* plug-in */
 static AsmArchDescription _yasep_description =
@@ -85,137 +78,4 @@ AsmArchPluginDefinition arch_plugin =
 /* private */
 /* functions */
 /* plug-in */
-/* yasep_init */
-static AsmArchPlugin * _yasep_init(AsmArchPluginHelper * helper)
-{
-	AsmArchPlugin * plugin;
-
-	if((plugin = object_new(sizeof(*plugin))) == NULL)
-		return NULL;
-	plugin->helper = helper;
-	return plugin;
-}
-
-
-/* yasep_destroy */
-static void _yasep_destroy(AsmArchPlugin * plugin)
-{
-	object_delete(plugin);
-}
-
-
-/* yasep_encode */
-static int _encode_16(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
-		AsmArchInstructionCall * call);
-static int _encode_32(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
-		AsmArchInstructionCall * call);
-
-static int _yasep_encode(AsmArchPlugin * plugin,
-		AsmArchInstruction * instruction, AsmArchInstructionCall * call)
-{
-	return (instruction->opcode & 0x1)
-		? _encode_32(plugin, instruction, call)
-		: _encode_16(plugin, instruction, call);
-}
-
-static int _encode_16(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
-		AsmArchInstructionCall * call)
-{
-	AsmArchPluginHelper * helper = plugin->helper;
-	uint16_t u16 = instruction->opcode;
-	AsmArchRegister * ar;
-	size_t size;
-	char const * name;
-
-	if((instruction->opcode & 0x03) == 0x0) /* RR */
-	{
-		name = call->operands[0].value._register.name;
-		size = AO_GET_SIZE(instruction->op1);
-		if((ar = helper->get_register_by_name_size(helper->arch, name,
-						size)) == NULL)
-			return -1;
-		u16 |= ar->id << 12;
-		name = call->operands[1].value._register.name;
-		size = AO_GET_SIZE(instruction->op2);
-		if((ar = helper->get_register_by_name_size(helper->arch, name,
-						size)) == NULL)
-			return -1;
-		u16 |= ar->id << 8;
-	}
-	else if((instruction->opcode & 0x03) == 0x2) /* IR */
-	{
-		u16 |= call->operands[0].value.immediate.value << 12;
-		name = call->operands[1].value._register.name;
-		size = AO_GET_SIZE(instruction->op2);
-		if((ar = helper->get_register_by_name_size(helper->arch, name,
-						size)) == NULL)
-			return -1;
-		u16 |= ar->id << 8;
-	}
-	u16 = _htol16(u16);
-	if(helper->write(helper->arch, &u16, sizeof(u16)) != sizeof(u16))
-		return -1;
-	return 0;
-}
-
-static int _encode_32(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
-		AsmArchInstructionCall * call)
-{
-	AsmArchPluginHelper * helper = plugin->helper;
-	uint32_t opcode = instruction->opcode;
-
-	opcode = _htol32(opcode);
-	if(helper->write(helper->arch, &opcode, sizeof(opcode))
-			!= sizeof(opcode))
-		return -1;
-	return 0;
-}
-
-
-/* yasep_decode */
-static int _yasep_decode(AsmArchPlugin * plugin, AsmArchInstructionCall * call)
-{
-	AsmArchPluginHelper * helper = plugin->helper;
-	uint16_t u16;
-	uint16_t opcode;
-	AsmArchInstruction * ai;
-	AsmArchRegister * ar;
-
-	if(helper->read(helper->arch, &u16, sizeof(u16)) != sizeof(u16))
-		return -1;
-	u16 = _htol16(u16);
-	opcode = u16 & 0x00ff;
-	if((ai = helper->get_instruction_by_opcode(helper->arch, 16, opcode))
-			== NULL)
-		return -1;
-	call->name = ai->name;
-	if((opcode & 0x3) == 0x0) /* RR */
-	{
-		call->operands[0].definition = ai->op1;
-		if((ar = helper->get_register_by_id_size(helper->arch,
-						((u16 & 0xf000) >> 12) & 0xf,
-						AO_GET_SIZE(ai->op1))) == NULL)
-			return -1;
-		call->operands[0].value._register.name = ar->name;
-		call->operands[1].definition = ai->op2;
-		if((ar = helper->get_register_by_id_size(helper->arch,
-						((u16 & 0x0f00) >> 8) & 0xf,
-						AO_GET_SIZE(ai->op2))) == NULL)
-			return -1;
-		call->operands[1].value._register.name = ar->name;
-		call->operands_cnt = 2;
-	}
-	else if((opcode & 0x03) == 0x2) /* IR */
-	{
-		call->operands[0].definition = ai->op1;
-		call->operands[0].value.immediate.value = (u16 & 0xf000) >> 12;
-		call->operands[1].definition = ai->op2;
-		if((ar = helper->get_register_by_id_size(helper->arch,
-						((u16 & 0x0f00) >> 8) & 0xf,
-						AO_GET_SIZE(ai->op2))) == NULL)
-			return -1;
-		call->operands[1].value._register.name = ar->name;
-		call->operands_cnt = 2;
-	}
-	return 0;
-}
+#include "yasep.h"
diff --git a/src/arch/yasep.h b/src/arch/yasep.h
new file mode 100644
index 0000000..d9ac604
--- /dev/null
+++ b/src/arch/yasep.h
@@ -0,0 +1,180 @@
+/* $Id$ */
+/* Copyright (c) 2013 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS Devel Asm */
+/* This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+
+
+#ifndef ASM_ARCH_YASEP_H
+# define ASM_ARCH_YASEP_H
+
+# include <System.h>
+
+
+/* yasep */
+/* private */
+/* types */
+struct _AsmArchPlugin
+{
+	AsmArchPluginHelper * helper;
+};
+
+
+/* prototypes */
+/* plug-in */
+static AsmArchPlugin * _yasep_init(AsmArchPluginHelper * helper);
+static void _yasep_destroy(AsmArchPlugin * plugin);
+static int _yasep_encode(AsmArchPlugin * plugin,
+		AsmArchInstruction * instruction,
+		AsmArchInstructionCall * call);
+static int _yasep_decode(AsmArchPlugin * plugin, AsmArchInstructionCall * call);
+
+
+/* functions */
+/* plug-in */
+/* yasep_init */
+static AsmArchPlugin * _yasep_init(AsmArchPluginHelper * helper)
+{
+	AsmArchPlugin * plugin;
+
+	if((plugin = object_new(sizeof(*plugin))) == NULL)
+		return NULL;
+	plugin->helper = helper;
+	return plugin;
+}
+
+
+/* yasep_destroy */
+static void _yasep_destroy(AsmArchPlugin * plugin)
+{
+	object_delete(plugin);
+}
+
+
+/* yasep_encode */
+static int _encode_16(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
+		AsmArchInstructionCall * call);
+static int _encode_32(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
+		AsmArchInstructionCall * call);
+
+static int _yasep_encode(AsmArchPlugin * plugin,
+		AsmArchInstruction * instruction, AsmArchInstructionCall * call)
+{
+	return (instruction->opcode & 0x1)
+		? _encode_32(plugin, instruction, call)
+		: _encode_16(plugin, instruction, call);
+}
+
+static int _encode_16(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
+		AsmArchInstructionCall * call)
+{
+	AsmArchPluginHelper * helper = plugin->helper;
+	uint16_t u16 = instruction->opcode;
+	AsmArchRegister * ar;
+	size_t size;
+	char const * name;
+
+	if((instruction->opcode & 0x03) == 0x0) /* RR */
+	{
+		name = call->operands[0].value._register.name;
+		size = AO_GET_SIZE(instruction->op1);
+		if((ar = helper->get_register_by_name_size(helper->arch, name,
+						size)) == NULL)
+			return -1;
+		u16 |= ar->id << 12;
+		name = call->operands[1].value._register.name;
+		size = AO_GET_SIZE(instruction->op2);
+		if((ar = helper->get_register_by_name_size(helper->arch, name,
+						size)) == NULL)
+			return -1;
+		u16 |= ar->id << 8;
+	}
+	else if((instruction->opcode & 0x03) == 0x2) /* IR */
+	{
+		u16 |= call->operands[0].value.immediate.value << 12;
+		name = call->operands[1].value._register.name;
+		size = AO_GET_SIZE(instruction->op2);
+		if((ar = helper->get_register_by_name_size(helper->arch, name,
+						size)) == NULL)
+			return -1;
+		u16 |= ar->id << 8;
+	}
+	u16 = _htol16(u16);
+	if(helper->write(helper->arch, &u16, sizeof(u16)) != sizeof(u16))
+		return -1;
+	return 0;
+}
+
+static int _encode_32(AsmArchPlugin * plugin, AsmArchInstruction * instruction,
+		AsmArchInstructionCall * call)
+{
+	AsmArchPluginHelper * helper = plugin->helper;
+	uint32_t opcode = instruction->opcode;
+
+	opcode = _htol32(opcode);
+	if(helper->write(helper->arch, &opcode, sizeof(opcode))
+			!= sizeof(opcode))
+		return -1;
+	return 0;
+}
+
+
+/* yasep_decode */
+static int _yasep_decode(AsmArchPlugin * plugin, AsmArchInstructionCall * call)
+{
+	AsmArchPluginHelper * helper = plugin->helper;
+	uint16_t u16;
+	uint16_t opcode;
+	AsmArchInstruction * ai;
+	AsmArchRegister * ar;
+
+	if(helper->read(helper->arch, &u16, sizeof(u16)) != sizeof(u16))
+		return -1;
+	u16 = _htol16(u16);
+	opcode = u16 & 0x00ff;
+	if((ai = helper->get_instruction_by_opcode(helper->arch, 16, opcode))
+			== NULL)
+		return -1;
+	call->name = ai->name;
+	if((opcode & 0x3) == 0x0) /* RR */
+	{
+		call->operands[0].definition = ai->op1;
+		if((ar = helper->get_register_by_id_size(helper->arch,
+						((u16 & 0xf000) >> 12) & 0xf,
+						AO_GET_SIZE(ai->op1))) == NULL)
+			return -1;
+		call->operands[0].value._register.name = ar->name;
+		call->operands[1].definition = ai->op2;
+		if((ar = helper->get_register_by_id_size(helper->arch,
+						((u16 & 0x0f00) >> 8) & 0xf,
+						AO_GET_SIZE(ai->op2))) == NULL)
+			return -1;
+		call->operands[1].value._register.name = ar->name;
+		call->operands_cnt = 2;
+	}
+	else if((opcode & 0x03) == 0x2) /* IR */
+	{
+		call->operands[0].definition = ai->op1;
+		call->operands[0].value.immediate.value = (u16 & 0xf000) >> 12;
+		call->operands[1].definition = ai->op2;
+		if((ar = helper->get_register_by_id_size(helper->arch,
+						((u16 & 0x0f00) >> 8) & 0xf,
+						AO_GET_SIZE(ai->op2))) == NULL)
+			return -1;
+		call->operands[1].value._register.name = ar->name;
+		call->operands_cnt = 2;
+	}
+	return 0;
+}
+
+#endif /* ASM_ARCH_YASEP_H */