diff --git a/src/arch/i386.ins b/src/arch/i386.ins
index 342898a..9246385 100644
--- a/src/arch/i386.ins
+++ b/src/arch/i386.ins
@@ -589,6 +589,14 @@
 { "fnop",	0xd9d0,		OP2F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
 /* FWAIT	0x9b		1					*/
 { "fwait",	0x9b,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
+/* FYL2XP1	0xd9f9		2					*/
+{ "fyl2xp1",	0xd9f9,		OP2F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
+/* HLT		0xf4		1					*/
+{ "hlt",	0xf4,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
+/* IDIV									*/
+/* FIXME implement */
+/* IMUL									*/
+/* FIXME implement */
 /* IN		0xe4		1     al          imm8			*/
 { "in",		0xe4,		OP1F, OP_al,      OP_S8,     AOT_NONE	},
 /* IN		0xe5		1     AX          imm8			*/
diff --git a/test/i386.S b/test/i386.S
index 9fc564a..a46d036 100644
--- a/test/i386.S
+++ b/test/i386.S
@@ -240,6 +240,8 @@
 	fnclex
 	fninit
 	fwait
+	fyl2xp1					/* d9 f9		*/
+	hlt					/* f4			*/
 	/* IN */
 	in	%al, $0x43			/* e4 43		*/
 	in	%eax, $0x44			/* e5 44		*/