[apple/xnu.git] / bsd / dev / x86_64 / munge.s

/*
 * Coyright (c) 2005-2008 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

/*
 * Syscall argument mungers.
 *
 * The data to be munged has been explicitly copied in to the argument area,
 * and will be munged in place in the uu_arg[] array.  Because of this, the
 * functions all take the same arguments as their PPC equivalents, but the
 * first argument is ignored.  These mungers are for 32-bit app's syscalls,
 * since 64-bit args are stored into the save area (which overlays the
 * uu_args) in the order the syscall ABI calls for.
 *
 * The issue is that the incoming args are 32-bit, but we must expand
 * them in place into 64-bit args, as if they were from a 64-bit process.
 *
 * There are several functions in this file.  Each takes two parameters:
 *
 *	void	munge_XXXX(const void *regs,		// %rdi
 *			   void       *uu_args);	// %rsi
 *
 * The name of the function encodes the number and type of the parameters,
 * as follows:
 *
 *	w = a 32-bit value such as an int or a 32-bit ptr, that does not
 *	    require sign extension.  These are handled by zeroing a word
 *          of output, and copying a word from input to output.
 *
 *	s = a 32-bit value such as a long, which must be sign-extended to
 *	    a 64-bit long-long in the uu_args.  These are handled by
 *	    loading a word of input and sign extending it to a double,
 *          and storing two words of output.
 *
 *	l = a 64-bit long-long.  These are handled by copying two words
 *          of input to the output.
 *
 * For example, "munge_wls" takes a word, a long-long, and a word.  This
 * takes four words in the uu_arg[] area: the first word is in one, the
 * long-long takes two, and the final word is in the fourth.  We store six
 * words: the low word is left in place, followed by a 0, followed by the
 * two words of the long-long, followed by the low word and the sign extended
 * high word of the preceeding low word.
 *
 * Because this is an in-place modification, we actually start at the end
 * of uu_arg[] and work our way back to the beginning of the array.
 *
 * As you can see, we save a lot of code by collapsing mungers that are
 * prefixes or suffixes of each other.
 */
#include <i386/asm.h>

ENTRY(munge_w)
	movl	$0,4(%rsi)
	ret
	
ENTRY(munge_ww)
	xorl	%edx,%edx
	jmp	Lw2
ENTRY(munge_www)
	xorl	%edx,%edx
	jmp	Lw3
ENTRY(munge_wwww)
	xorl	%edx,%edx
	jmp	Lw4
ENTRY(munge_wwwww)
	xorl	%edx,%edx
	jmp	Lw5
ENTRY(munge_wwwwww)
	xorl	%edx,%edx
	jmp	Lw6
ENTRY(munge_wwwwwww)
	xorl	%edx,%edx
	jmp	Lw7
ENTRY(munge_wwwwwwww)
	xorl	%edx,%edx
	movl	28(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	%edx,60(%rsi)
Lw7:
	movl	24(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	%edx,52(%rsi)
Lw6:
	movl	20(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	%edx,44(%rsi)
Lw5:
	movl	16(%rsi),%eax
	movl	%eax,32(%rsi)
	movl	%edx,36(%rsi)
Lw4:
	movl	12(%rsi),%eax
	movl	%eax,24(%rsi)
	movl	%edx,28(%rsi)
Lw3:
	movl	8(%rsi),%eax
	movl	%eax,16(%rsi)
	movl	%edx,20(%rsi)
Lw2:
	movl	4(%rsi),%eax
	movl	%eax,8(%rsi)
	movl	%edx,12(%rsi)
	movl	%edx,4(%rsi)
	ret


Entry(munge_wl)			/* Costs an extra w move to do this */
ENTRY(munge_wlw)
	xorl	%edx,%edx
Lwlw:
	movl	12(%rsi),%eax
	movl	%eax,16(%rsi)
	movl	%edx,20(%rsi)
Lwl:
	movl	8(%rsi),%eax
	movl	%eax,12(%rsi)
	movl	4(%rsi),%eax
	movl	%eax,8(%rsi)

	movl	%edx,4(%rsi)
	ret

ENTRY(munge_wlwwwll)
	xorl	%edx,%edx
Lwlwwwll:
	movl	36(%rsi),%eax
	movl	%eax,52(%rsi)
	movl	32(%rsi),%eax
	movl	%eax,48(%rsi)

	movl	28(%rsi),%eax
	movl	%eax,44(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,40(%rsi)

	movl	20(%rsi),%eax
	movl	%eax,32(%rsi)
	movl	%edx,36(%rsi)
Lwlww:
	movl	16(%rsi),%eax
	movl	%eax,24(%rsi)
	movl	%edx,28(%rsi)
	jmp	Lwlw

ENTRY(munge_wlwwwllw)
	xorl	%edx,%edx
	movl	40(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	%edx,60(%rsi)
	jmp     Lwlwwwll

ENTRY(munge_wlwwlwlw)
	xorl	%edx,%edx
	movl	40(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	%edx,60(%rsi)
	movl	36(%rsi),%eax
	movl	%eax,52(%rsi)
	movl	32(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	%edx,44(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,36(%rsi)
	movl	20(%rsi),%eax
	movl	%eax,32(%rsi)
	jmp     Lwlww


ENTRY(munge_wllwwll)
	xorl	%edx,%edx

	movl	40(%rsi),%eax	//l
	movl	%eax,52(%rsi)
	movl	36(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	32(%rsi),%eax	//l
	movl	%eax,44(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	24(%rsi),%eax	//w
	movl	%eax,32(%rsi)
	movl	%edx,36(%rsi)
	movl	20(%rsi),%eax	//w
	movl	%eax,24(%rsi)
	movl	%edx,28(%rsi)
	movl	16(%rsi),%eax	//l
	movl	%eax,20(%rsi)
	movl	12(%rsi),%eax
	movl	%eax,16(%rsi)

	jmp	Lwl

Entry(munge_wwwlw)
	xorl	%edx,%edx
	movl	20(%rsi),%eax
	movl	%eax,32(%rsi)
	movl	%edx,36(%rsi)
	jmp Lwwwl


ENTRY(munge_wwwl)
	xorl	%edx,%edx
Lwwwl:
	movl	12(%rsi),%eax
	movl	%eax,24(%rsi)
	movl	16(%rsi),%eax
	movl	%eax,28(%rsi)
	jmp	Lw3

ENTRY(munge_wwwwlw)
	xorl	%edx,%edx
	movl	24(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	%edx,44(%rsi)
	jmp	Lwwwwl

ENTRY(munge_wwwwl)
	xorl	%edx,%edx
Lwwwwl:
	movl	16(%rsi),%eax
	movl	%eax,32(%rsi)
	movl	20(%rsi),%eax
	movl	%eax,36(%rsi)
	jmp	Lw4

ENTRY(munge_wwwwwl)
	xorl	%edx,%edx
	movl	20(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,44(%rsi)
	jmp	Lw5


ENTRY(munge_wwwwwlww)
	xorl	%edx,%edx
	movl	32(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	%edx,60(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	%edx,52(%rsi)
	movl	20(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,44(%rsi)

	jmp	Lw5

ENTRY(munge_wwwwwllw)
	xorl	%edx,%edx
	movl	36(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	%edx,60(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	32(%rsi),%eax
	movl	%eax,52(%rsi)
	movl	20(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,44(%rsi)
	jmp	Lw5

ENTRY(munge_wwwwwlll)
	xorl	%edx,%edx
	movl	36(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	40(%rsi),%eax
	movl	%eax,60(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	32(%rsi),%eax
	movl	%eax,52(%rsi)
	movl	20(%rsi),%eax
	movl	%eax,40(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,44(%rsi)
	jmp	Lw5

ENTRY(munge_wwwwwwl)
	xorl	%edx,%edx
	movl	24(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,52(%rsi)
	jmp	Lw6

ENTRY(munge_wwwwwwlw)
	xorl	%edx,%edx
	movl	32(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	%edx,60(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,52(%rsi)
	jmp	Lw6

ENTRY(munge_wwwwwwll)
	xorl	%edx,%edx
	movl	32(%rsi),%eax
	movl	%eax,56(%rsi)
	movl	36(%rsi),%eax
	movl	%eax,60(%rsi)
	movl	24(%rsi),%eax
	movl	%eax,48(%rsi)
	movl	28(%rsi),%eax
	movl	%eax,52(%rsi)
	jmp	Lw6

ENTRY(munge_wsw)
	movl	8(%rsi),%eax
	movl	%eax,16(%rsi)
	movl	$0,20(%rsi)
	movl	4(%rsi),%eax
	cltd
	movl	%eax,8(%rsi)
	movl	%edx,12(%rsi)
	movl	$0,4(%rsi)
	ret

ENTRY(munge_wws)
	movl	8(%rsi),%eax
	cltd
	movl	%eax,16(%rsi)
	movl	%edx,20(%rsi)
	xorl	%edx,%edx
	jmp	Lw2

ENTRY(munge_wwwsw)
	movl	16(%rsi),%eax
	movl	%eax,32(%rsi)
	movl	$0,36(%rsi)
	movl	12(%rsi),%eax
	cltd
	movl	%eax,24(%rsi)
	movl	%edx,28(%rsi)
	xorl	%edx,%edx
	jmp	Lw3

ENTRY(munge_llllll)
	ret						// nothing to do here, either - all args are already
							// 64-bit and do not require sign/zero extension
							// also, there is no mixing in of shorter args that
							// do need extension
Commit	Line	Data
b0d623f7 A	1	/*
	2	* Coyright (c) 2005-2008 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	/*
	30	* Syscall argument mungers.
	31	*
	32	* The data to be munged has been explicitly copied in to the argument area,
	33	* and will be munged in place in the uu_arg[] array. Because of this, the
	34	* functions all take the same arguments as their PPC equivalents, but the
	35	* first argument is ignored. These mungers are for 32-bit app's syscalls,
	36	* since 64-bit args are stored into the save area (which overlays the
	37	* uu_args) in the order the syscall ABI calls for.
	38	*
	39	* The issue is that the incoming args are 32-bit, but we must expand
	40	* them in place into 64-bit args, as if they were from a 64-bit process.
	41	*
	42	* There are several functions in this file. Each takes two parameters:
	43	*
	44	* void munge_XXXX(const void *regs, // %rdi
	45	* void *uu_args); // %rsi
	46	*
	47	* The name of the function encodes the number and type of the parameters,
	48	* as follows:
	49	*
	50	* w = a 32-bit value such as an int or a 32-bit ptr, that does not
	51	* require sign extension. These are handled by zeroing a word
	52	* of output, and copying a word from input to output.
	53	*
	54	* s = a 32-bit value such as a long, which must be sign-extended to
	55	* a 64-bit long-long in the uu_args. These are handled by
	56	* loading a word of input and sign extending it to a double,
	57	* and storing two words of output.
	58	*
	59	* l = a 64-bit long-long. These are handled by copying two words
	60	* of input to the output.
	61	*
	62	* For example, "munge_wls" takes a word, a long-long, and a word. This
	63	* takes four words in the uu_arg[] area: the first word is in one, the
	64	* long-long takes two, and the final word is in the fourth. We store six
65	* words: the low word is left in place, followed by a 0, followed by the
66	* two words of the long-long, followed by the low word and the sign extended
67	* high word of the preceeding low word.
68	*
69	* Because this is an in-place modification, we actually start at the end
70	* of uu_arg[] and work our way back to the beginning of the array.
71	*
72	* As you can see, we save a lot of code by collapsing mungers that are
73	* prefixes or suffixes of each other.
74	*/
75	#include <i386/asm.h>
76
77	ENTRY(munge_w)
78	movl $0,4(%rsi)
79	ret
80
81	ENTRY(munge_ww)
82	xorl %edx,%edx
83	jmp Lw2
84	ENTRY(munge_www)
85	xorl %edx,%edx
86	jmp Lw3
87	ENTRY(munge_wwww)
88	xorl %edx,%edx
89	jmp Lw4
90	ENTRY(munge_wwwww)
91	xorl %edx,%edx
92	jmp Lw5
93	ENTRY(munge_wwwwww)
94	xorl %edx,%edx
95	jmp Lw6
96	ENTRY(munge_wwwwwww)
97	xorl %edx,%edx
98	jmp Lw7
99	ENTRY(munge_wwwwwwww)
100	xorl %edx,%edx
101	movl 28(%rsi),%eax
102	movl %eax,56(%rsi)
103	movl %edx,60(%rsi)
104	Lw7:
105	movl 24(%rsi),%eax
106	movl %eax,48(%rsi)
107	movl %edx,52(%rsi)
108	Lw6:
109	movl 20(%rsi),%eax
110	movl %eax,40(%rsi)
111	movl %edx,44(%rsi)
112	Lw5:
113	movl 16(%rsi),%eax
114	movl %eax,32(%rsi)
115	movl %edx,36(%rsi)
116	Lw4:
117	movl 12(%rsi),%eax
118	movl %eax,24(%rsi)
119	movl %edx,28(%rsi)
120	Lw3:
121	movl 8(%rsi),%eax
122	movl %eax,16(%rsi)
123	movl %edx,20(%rsi)
124	Lw2:
125	movl 4(%rsi),%eax
126	movl %eax,8(%rsi)
127	movl %edx,12(%rsi)
128	movl %edx,4(%rsi)
129	ret
130
131
132	Entry(munge_wl) /* Costs an extra w move to do this */
133	ENTRY(munge_wlw)
134	xorl %edx,%edx
6d2010ae	135	Lwlw:
b0d623f7 A	136	movl 12(%rsi),%eax
	137	movl %eax,16(%rsi)
	138	movl %edx,20(%rsi)
6d2010ae	139	Lwl:
b0d623f7 A	140	movl 8(%rsi),%eax
	141	movl %eax,12(%rsi)
	142	movl 4(%rsi),%eax
	143	movl %eax,8(%rsi)
6d2010ae	144
b0d623f7 A	145	movl %edx,4(%rsi)
	146	ret
	147
6d2010ae A	148	ENTRY(munge_wlwwwll)
	149	xorl %edx,%edx
	150	Lwlwwwll:
	151	movl 36(%rsi),%eax
	152	movl %eax,52(%rsi)
	153	movl 32(%rsi),%eax
	154	movl %eax,48(%rsi)
	155
	156	movl 28(%rsi),%eax
	157	movl %eax,44(%rsi)
	158	movl 24(%rsi),%eax
	159	movl %eax,40(%rsi)
	160
	161	movl 20(%rsi),%eax
	162	movl %eax,32(%rsi)
	163	movl %edx,36(%rsi)
	164	Lwlww:
	165	movl 16(%rsi),%eax
	166	movl %eax,24(%rsi)
	167	movl %edx,28(%rsi)
	168	jmp Lwlw
	169
	170	ENTRY(munge_wlwwwllw)
	171	xorl %edx,%edx
	172	movl 40(%rsi),%eax
	173	movl %eax,56(%rsi)
	174	movl %edx,60(%rsi)
	175	jmp Lwlwwwll
	176
	177	ENTRY(munge_wlwwlwlw)
	178	xorl %edx,%edx
	179	movl 40(%rsi),%eax
	180	movl %eax,56(%rsi)
	181	movl %edx,60(%rsi)
	182	movl 36(%rsi),%eax
	183	movl %eax,52(%rsi)
	184	movl 32(%rsi),%eax
	185	movl %eax,48(%rsi)
	186	movl 28(%rsi),%eax
	187	movl %eax,40(%rsi)
	188	movl %edx,44(%rsi)
	189	movl 24(%rsi),%eax
	190	movl %eax,36(%rsi)
	191	movl 20(%rsi),%eax
	192	movl %eax,32(%rsi)
	193	jmp Lwlww
	194
	195
	196	ENTRY(munge_wllwwll)
	197	xorl %edx,%edx
	198
	199	movl 40(%rsi),%eax //l
	200	movl %eax,52(%rsi)
	201	movl 36(%rsi),%eax
	202	movl %eax,48(%rsi)
	203	movl 32(%rsi),%eax //l
	204	movl %eax,44(%rsi)
	205	movl 28(%rsi),%eax
	206	movl %eax,40(%rsi)
	207	movl 24(%rsi),%eax //w
	208	movl %eax,32(%rsi)
	209	movl %edx,36(%rsi)
	210	movl 20(%rsi),%eax //w
	211	movl %eax,24(%rsi)
212	movl %edx,28(%rsi)
213	movl 16(%rsi),%eax //l
214	movl %eax,20(%rsi)
215	movl 12(%rsi),%eax
216	movl %eax,16(%rsi)
217
218	jmp Lwl
219
b0d623f7 A	220	Entry(munge_wwwlw)
	221	xorl %edx,%edx
	222	movl 20(%rsi),%eax
	223	movl %eax,32(%rsi)
	224	movl %edx,36(%rsi)
	225	jmp Lwwwl
	226
	227
	228	ENTRY(munge_wwwl)
	229	xorl %edx,%edx
	230	Lwwwl:
	231	movl 12(%rsi),%eax
	232	movl %eax,24(%rsi)
	233	movl 16(%rsi),%eax
	234	movl %eax,28(%rsi)
	235	jmp Lw3
	236
	237	ENTRY(munge_wwwwlw)
	238	xorl %edx,%edx
	239	movl 24(%rsi),%eax
	240	movl %eax,40(%rsi)
	241	movl %edx,44(%rsi)
	242	jmp Lwwwwl
	243
	244	ENTRY(munge_wwwwl)
	245	xorl %edx,%edx
	246	Lwwwwl:
	247	movl 16(%rsi),%eax
	248	movl %eax,32(%rsi)
	249	movl 20(%rsi),%eax
	250	movl %eax,36(%rsi)
	251	jmp Lw4
	252
	253	ENTRY(munge_wwwwwl)
	254	xorl %edx,%edx
	255	movl 20(%rsi),%eax
	256	movl %eax,40(%rsi)
	257	movl 24(%rsi),%eax
	258	movl %eax,44(%rsi)
	259	jmp Lw5
	260
6d2010ae A	261
	262	ENTRY(munge_wwwwwlww)
	263	xorl %edx,%edx
	264	movl 32(%rsi),%eax
	265	movl %eax,56(%rsi)
	266	movl %edx,60(%rsi)
	267	movl 28(%rsi),%eax
	268	movl %eax,48(%rsi)
	269	movl %edx,52(%rsi)
	270	movl 20(%rsi),%eax
	271	movl %eax,40(%rsi)
	272	movl 24(%rsi),%eax
	273	movl %eax,44(%rsi)
	274
	275	jmp Lw5
	276
	277	ENTRY(munge_wwwwwllw)
	278	xorl %edx,%edx
	279	movl 36(%rsi),%eax
	280	movl %eax,56(%rsi)
	281	movl %edx,60(%rsi)
	282	movl 28(%rsi),%eax
	283	movl %eax,48(%rsi)
	284	movl 32(%rsi),%eax
	285	movl %eax,52(%rsi)
	286	movl 20(%rsi),%eax
	287	movl %eax,40(%rsi)
	288	movl 24(%rsi),%eax
	289	movl %eax,44(%rsi)
	290	jmp Lw5
	291
	292	ENTRY(munge_wwwwwlll)
	293	xorl %edx,%edx
	294	movl 36(%rsi),%eax
	295	movl %eax,56(%rsi)
	296	movl 40(%rsi),%eax
	297	movl %eax,60(%rsi)
	298	movl 28(%rsi),%eax
	299	movl %eax,48(%rsi)
	300	movl 32(%rsi),%eax
	301	movl %eax,52(%rsi)
	302	movl 20(%rsi),%eax
	303	movl %eax,40(%rsi)
	304	movl 24(%rsi),%eax
	305	movl %eax,44(%rsi)
	306	jmp Lw5
	307
	308	ENTRY(munge_wwwwwwl)
	309	xorl %edx,%edx
	310	movl 24(%rsi),%eax
	311	movl %eax,48(%rsi)
	312	movl 28(%rsi),%eax
	313	movl %eax,52(%rsi)
	314	jmp Lw6
	315
b0d623f7 A	316	ENTRY(munge_wwwwwwlw)
	317	xorl %edx,%edx
	318	movl 32(%rsi),%eax
	319	movl %eax,56(%rsi)
	320	movl %edx,60(%rsi)
	321	movl 24(%rsi),%eax
	322	movl %eax,48(%rsi)
	323	movl 28(%rsi),%eax
	324	movl %eax,52(%rsi)
	325	jmp Lw6
	326
	327	ENTRY(munge_wwwwwwll)
	328	xorl %edx,%edx
	329	movl 32(%rsi),%eax
	330	movl %eax,56(%rsi)
	331	movl 36(%rsi),%eax
	332	movl %eax,60(%rsi)
	333	movl 24(%rsi),%eax
	334	movl %eax,48(%rsi)
	335	movl 28(%rsi),%eax
	336	movl %eax,52(%rsi)
	337	jmp Lw6
	338
	339	ENTRY(munge_wsw)
	340	movl 8(%rsi),%eax
	341	movl %eax,16(%rsi)
	342	movl $0,20(%rsi)
	343	movl 4(%rsi),%eax
	344	cltd
	345	movl %eax,8(%rsi)
	346	movl %edx,12(%rsi)
	347	movl $0,4(%rsi)
	348	ret
	349
	350	ENTRY(munge_wws)
	351	movl 8(%rsi),%eax
	352	cltd
	353	movl %eax,16(%rsi)
	354	movl %edx,20(%rsi)
	355	xorl %edx,%edx
	356	jmp Lw2
	357
	358	ENTRY(munge_wwwsw)
	359	movl 16(%rsi),%eax
	360	movl %eax,32(%rsi)
	361	movl $0,36(%rsi)
	362	movl 12(%rsi),%eax
	363	cltd
	364	movl %eax,24(%rsi)
	365	movl %edx,28(%rsi)
	366	xorl %edx,%edx
	367	jmp Lw3
	368
	369	ENTRY(munge_llllll)
	370	ret // nothing to do here, either - all args are already
	371	// 64-bit and do not require sign/zero extension
	372	// also, there is no mixing in of shorter args that
	373	// do need extension