[ceph.git] / ceph / src / spdk / intel-ipsec-mb / avx2 / mb_mgr_hmac_flush_avx2.asm

;;
;; Copyright (c) 2012-2018, Intel Corporation
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions are met:
;;
;;     * Redistributions of source code must retain the above copyright notice,
;;       this list of conditions and the following disclaimer.
;;     * Redistributions in binary form must reproduce the above copyright
;;       notice, this list of conditions and the following disclaimer in the
;;       documentation and/or other materials provided with the distribution.
;;     * Neither the name of Intel Corporation nor the names of its contributors
;;       may be used to endorse or promote products derived from this software
;;       without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
;; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;

%include "os.asm"
%include "job_aes_hmac.asm"
%include "mb_mgr_datastruct.asm"
%include "reg_sizes.asm"
;%define DO_DBGPRINT
%include "dbgprint.asm"
extern sha1_x8_avx2

section .data
default rel

align 16
byteswap:	;ddq 0x0c0d0e0f08090a0b0405060700010203
	dq 0x0405060700010203, 0x0c0d0e0f08090a0b
x80:    ;ddq 0x00000000000000000000000000000080
        dq 0x0000000000000080, 0x0000000000000000
x00:    ;ddq 0x00000000000000000000000000000000
        dq 0x0000000000000000, 0x0000000000000000
len_masks:
	;ddq 0x0000000000000000000000000000FFFF
	dq 0x000000000000FFFF, 0x0000000000000000
	;ddq 0x000000000000000000000000FFFF0000
	dq 0x00000000FFFF0000, 0x0000000000000000
	;ddq 0x00000000000000000000FFFF00000000
	dq 0x0000FFFF00000000, 0x0000000000000000
	;ddq 0x0000000000000000FFFF000000000000
	dq 0xFFFF000000000000, 0x0000000000000000
	;ddq 0x000000000000FFFF0000000000000000
	dq 0x0000000000000000, 0x000000000000FFFF
	;ddq 0x00000000FFFF00000000000000000000
	dq 0x0000000000000000, 0x00000000FFFF0000
	;ddq 0x0000FFFF000000000000000000000000
	dq 0x0000000000000000, 0x0000FFFF00000000
	;ddq 0xFFFF0000000000000000000000000000
	dq 0x0000000000000000, 0xFFFF000000000000
lane_1: dq  1
lane_2: dq  2
lane_3: dq  3
lane_4: dq  4
lane_5: dq  5
lane_6: dq  6
lane_7: dq  7

section .text

%if 1
%ifdef LINUX
%define arg1	rdi
%define arg2	rsi
%else
%define arg1	rcx
%define arg2	rdx
%endif

%define state	arg1
%define job	arg2
%define len2	arg2


; idx needs to be in rbx, rdi, rbp
%define idx		rbp

%define unused_lanes	r9
%define lane_data	r9
%define tmp2		r9

%define job_rax		rax
%define	tmp1		rax
%define size_offset	rax
%define tmp		rax
%define start_offset	rax

%define tmp3		arg1

%define extra_blocks	arg2
%define p		arg2

%define tmp4		r8

%endif

; we clobber rbp, called routine clobbers r12-r15
struc STACK
_gpr_save:	resq	5
_rsp_save:	resq	1
endstruc

%define APPEND(a,b) a %+ b

; JOB* flush_job_hmac_avx(MB_MGR_HMAC_SHA_1_OOO *state)
; arg 1 : rcx : state
MKGLOBAL(flush_job_hmac_avx2,function,internal)
flush_job_hmac_avx2:

	mov	rax, rsp
	sub	rsp, STACK_size
	and	rsp, -32		; align stack to 32 byte boundary
	mov	[rsp + _gpr_save + 8*0], rbp
	mov	[rsp + _gpr_save + 8*1], r12
	mov	[rsp + _gpr_save + 8*2], r13
	mov	[rsp + _gpr_save + 8*3], r14
	mov	[rsp + _gpr_save + 8*4], r15
	mov	[rsp + _rsp_save], rax

	mov	unused_lanes, [state + _unused_lanes]
	bt	unused_lanes, 32+3
	jc	return_null

	; find a lane with a non-null job
	xor	idx, idx
%assign I 1
%rep 7
	cmp	qword [state + _ldata + (I * _HMAC_SHA1_LANE_DATA_size) + _job_in_lane], 0
	cmovne	idx, [rel APPEND(lane_,I)]
%assign I (I+1)
%endrep

copy_lane_data:
	; copy valid lane (idx) to empty lanes
	vmovdqa	xmm0, [state + _lens]
	mov	tmp, [state + _args_data_ptr + PTR_SZ*idx]

%assign I 0
%rep 8
	cmp	qword [state + _ldata + I * _HMAC_SHA1_LANE_DATA_size + _job_in_lane], 0
	jne	APPEND(skip_,I)
	mov	[state + _args_data_ptr + PTR_SZ*I], tmp
	vpor	xmm0, xmm0, [rel len_masks + 16*I]
APPEND(skip_,I):
%assign I (I+1)
%endrep

	vmovdqa	[state + _lens], xmm0

	vphminposuw	xmm1, xmm0
	vpextrw	DWORD(len2), xmm1, 0	; min value
	vpextrw	DWORD(idx), xmm1, 1	; min index (0...7)
	DBGPRINTL64 "FLUSH min_length", len2
	DBGPRINTL64 "FLUSH min_length index ", idx
	cmp	len2, 0
	je	len_is_0

	vpbroadcastw	xmm1, xmm1
	DBGPRINTL_XMM "FLUSH lens after shuffle", xmm1

	vpsubw	xmm0, xmm0, xmm1
	vmovdqa	[state + _lens], xmm0
	DBGPRINTL_XMM "FLUSH lens immediately after min subtraction", xmm0

	; "state" and "args" are the same address, arg1
	; len is arg2
	call	sha1_x8_avx2
	; state and idx are intact

len_is_0:
	; process completed job "idx"
	imul	lane_data, idx, _HMAC_SHA1_LANE_DATA_size
	lea	lane_data, [state + _ldata + lane_data]
	mov	DWORD(extra_blocks), [lane_data + _extra_blocks]
	cmp	extra_blocks, 0
	jne	proc_extra_blocks
	cmp	dword [lane_data + _outer_done], 0
	jne	end_loop

proc_outer:
	mov	dword [lane_data + _outer_done], 1
	mov	DWORD(size_offset), [lane_data + _size_offset]
	mov	qword [lane_data + _extra_block + size_offset], 0
	mov	word [state + _lens + 2*idx], 1
	lea	tmp, [lane_data + _outer_block]
	mov	job, [lane_data + _job_in_lane]
	mov	[state + _args_data_ptr + PTR_SZ*idx], tmp

	vmovd	xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 0*SHA1_DIGEST_ROW_SIZE]
	vpinsrd	xmm0, xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 1*SHA1_DIGEST_ROW_SIZE], 1
	vpinsrd	xmm0, xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 2*SHA1_DIGEST_ROW_SIZE], 2
	vpinsrd	xmm0, xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 3*SHA1_DIGEST_ROW_SIZE], 3
	vpshufb	xmm0, xmm0, [rel byteswap]
	mov	DWORD(tmp),  [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 4*SHA1_DIGEST_ROW_SIZE]
	bswap	DWORD(tmp)
	vmovdqa	[lane_data + _outer_block], xmm0
	mov	[lane_data + _outer_block + 4*4], DWORD(tmp)

	mov	tmp, [job + _auth_key_xor_opad]
	vmovdqu	xmm0, [tmp]
	mov	DWORD(tmp),  [tmp + 4*4]
	vmovd	[state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 0*SHA1_DIGEST_ROW_SIZE], xmm0
	vpextrd	[state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 1*SHA1_DIGEST_ROW_SIZE], xmm0, 1
	vpextrd	[state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 2*SHA1_DIGEST_ROW_SIZE], xmm0, 2
	vpextrd	[state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 3*SHA1_DIGEST_ROW_SIZE], xmm0, 3
	mov	[state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 4*SHA1_DIGEST_ROW_SIZE], DWORD(tmp)
	jmp	copy_lane_data

	align	16
proc_extra_blocks:
	mov	DWORD(start_offset), [lane_data + _start_offset]
	mov	[state + _lens + 2*idx], WORD(extra_blocks)
	lea	tmp, [lane_data + _extra_block + start_offset]
	mov	[state + _args_data_ptr + PTR_SZ*idx], tmp
	mov	dword [lane_data + _extra_blocks], 0
	jmp	copy_lane_data

return_null:
	xor	job_rax, job_rax
	jmp	return

	align	16
end_loop:
	mov	job_rax, [lane_data + _job_in_lane]
	mov	qword [lane_data + _job_in_lane], 0
	or	dword [job_rax + _status], STS_COMPLETED_HMAC
	mov	unused_lanes, [state + _unused_lanes]
	shl	unused_lanes, 4	 ;; a nibble
	or	unused_lanes, idx
	mov	[state + _unused_lanes], unused_lanes

	mov	p, [job_rax + _auth_tag_output]

	; copy 12 bytes
	mov	DWORD(tmp2), [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 0*SHA1_DIGEST_ROW_SIZE]
	mov	DWORD(tmp4), [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 1*SHA1_DIGEST_ROW_SIZE]
	mov	DWORD(r12), [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 2*SHA1_DIGEST_ROW_SIZE]
	bswap	DWORD(tmp2)
	bswap	DWORD(tmp4)
	bswap	DWORD(r12)
	mov	[p + 0*4], DWORD(tmp2)
	mov	[p + 1*4], DWORD(tmp4)
	mov	[p + 2*4], DWORD(r12)

        cmp     qword [job_rax + _auth_tag_output_len_in_bytes], 12
        je      return

        ;; copy remaining 8 bytes to return 20 byte digest
        mov	DWORD(r13),  [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 3*SHA1_DIGEST_ROW_SIZE]
        mov	DWORD(r14), [state + _args_digest + SHA1_DIGEST_WORD_SIZE*idx + 4*SHA1_DIGEST_ROW_SIZE]
        bswap	DWORD(r13)
        bswap	DWORD(r14)
        mov	[p + 3*SHA1_DIGEST_WORD_SIZE], DWORD(r13)
        mov	[p + 4*SHA1_DIGEST_WORD_SIZE], DWORD(r14)

return:
        vzeroupper
	mov	rbp, [rsp + _gpr_save + 8*0]
	mov	r12, [rsp + _gpr_save + 8*1]
	mov	r13, [rsp + _gpr_save + 8*2]
	mov	r14, [rsp + _gpr_save + 8*3]
	mov	r15, [rsp + _gpr_save + 8*4]
	mov	rsp, [rsp + _rsp_save]
	ret

%ifdef LINUX
section .note.GNU-stack noalloc noexec nowrite progbits
%endif
Commit	Line	Data
11fdf7f2 TL	1	;;
	2	;; Copyright (c) 2012-2018, Intel Corporation
	3	;;
	4	;; Redistribution and use in source and binary forms, with or without
	5	;; modification, are permitted provided that the following conditions are met:
	6	;;
	7	;; * Redistributions of source code must retain the above copyright notice,
	8	;; this list of conditions and the following disclaimer.
	9	;; * Redistributions in binary form must reproduce the above copyright
	10	;; notice, this list of conditions and the following disclaimer in the
	11	;; documentation and/or other materials provided with the distribution.
	12	;; * Neither the name of Intel Corporation nor the names of its contributors
	13	;; may be used to endorse or promote products derived from this software
	14	;; without specific prior written permission.
	15	;;
	16	;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	17	;; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	18	;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	19	;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
	20	;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	21	;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	22	;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	23	;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	24	;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	25	;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	26	;;
	27
	28	%include "os.asm"
	29	%include "job_aes_hmac.asm"
	30	%include "mb_mgr_datastruct.asm"
	31	%include "reg_sizes.asm"
	32	;%define DO_DBGPRINT
	33	%include "dbgprint.asm"
	34	extern sha1_x8_avx2
	35
	36	section .data
	37	default rel
	38
	39	align 16
	40	byteswap: ;ddq 0x0c0d0e0f08090a0b0405060700010203
	41	dq 0x0405060700010203, 0x0c0d0e0f08090a0b
	42	x80: ;ddq 0x00000000000000000000000000000080
	43	dq 0x0000000000000080, 0x0000000000000000
	44	x00: ;ddq 0x00000000000000000000000000000000
	45	dq 0x0000000000000000, 0x0000000000000000
	46	len_masks:
	47	;ddq 0x0000000000000000000000000000FFFF
	48	dq 0x000000000000FFFF, 0x0000000000000000
	49	;ddq 0x000000000000000000000000FFFF0000
	50	dq 0x00000000FFFF0000, 0x0000000000000000
	51	;ddq 0x00000000000000000000FFFF00000000
	52	dq 0x0000FFFF00000000, 0x0000000000000000
	53	;ddq 0x0000000000000000FFFF000000000000
	54	dq 0xFFFF000000000000, 0x0000000000000000
	55	;ddq 0x000000000000FFFF0000000000000000
	56	dq 0x0000000000000000, 0x000000000000FFFF
	57	;ddq 0x00000000FFFF00000000000000000000
	58	dq 0x0000000000000000, 0x00000000FFFF0000
	59	;ddq 0x0000FFFF000000000000000000000000
	60	dq 0x0000000000000000, 0x0000FFFF00000000
	61	;ddq 0xFFFF0000000000000000000000000000
	62	dq 0x0000000000000000, 0xFFFF000000000000
	63	lane_1: dq 1
	64	lane_2: dq 2
65	lane_3: dq 3
66	lane_4: dq 4
67	lane_5: dq 5
68	lane_6: dq 6
69	lane_7: dq 7
70
71	section .text
72
73	%if 1
74	%ifdef LINUX
75	%define arg1 rdi
76	%define arg2 rsi
77	%else
78	%define arg1 rcx
79	%define arg2 rdx
80	%endif
81
82	%define state arg1
83	%define job arg2
84	%define len2 arg2
85
86
87	; idx needs to be in rbx, rdi, rbp
88	%define idx rbp
89
90	%define unused_lanes r9
91	%define lane_data r9
92	%define tmp2 r9
93
94	%define job_rax rax
95	%define tmp1 rax
96	%define size_offset rax
97	%define tmp rax
98	%define start_offset rax
99
100	%define tmp3 arg1
101
102	%define extra_blocks arg2
103	%define p arg2
104
105	%define tmp4 r8
106
107	%endif
108
109	; we clobber rbp, called routine clobbers r12-r15
110	struc STACK
111	_gpr_save: resq 5
112	_rsp_save: resq 1
113	endstruc
114
115	%define APPEND(a,b) a %+ b
116
117	; JOB* flush_job_hmac_avx(MB_MGR_HMAC_SHA_1_OOO *state)
118	; arg 1 : rcx : state
119	MKGLOBAL(flush_job_hmac_avx2,function,internal)
120	flush_job_hmac_avx2:
121
122	mov rax, rsp
123	sub rsp, STACK_size
124	and rsp, -32 ; align stack to 32 byte boundary
125	mov [rsp + _gpr_save + 8*0], rbp
126	mov [rsp + _gpr_save + 8*1], r12
127	mov [rsp + _gpr_save + 8*2], r13
128	mov [rsp + _gpr_save + 8*3], r14
129	mov [rsp + _gpr_save + 8*4], r15
130	mov [rsp + _rsp_save], rax
131
132	mov unused_lanes, [state + _unused_lanes]
133	bt unused_lanes, 32+3
134	jc return_null
135
136	; find a lane with a non-null job
137	xor idx, idx
138	%assign I 1
139	%rep 7
140	cmp qword [state + _ldata + (I * _HMAC_SHA1_LANE_DATA_size) + _job_in_lane], 0
141	cmovne idx, [rel APPEND(lane_,I)]
142	%assign I (I+1)
143	%endrep
144
145	copy_lane_data:
146	; copy valid lane (idx) to empty lanes
147	vmovdqa xmm0, [state + _lens]
148	mov tmp, [state + _args_data_ptr + PTR_SZ*idx]
149
150	%assign I 0
151	%rep 8
152	cmp qword [state + _ldata + I * _HMAC_SHA1_LANE_DATA_size + _job_in_lane], 0
153	jne APPEND(skip_,I)
154	mov [state + _args_data_ptr + PTR_SZ*I], tmp
155	vpor xmm0, xmm0, [rel len_masks + 16*I]
156	APPEND(skip_,I):
157	%assign I (I+1)
158	%endrep
159
160	vmovdqa [state + _lens], xmm0
161
162	vphminposuw xmm1, xmm0
163	vpextrw DWORD(len2), xmm1, 0 ; min value
164	vpextrw DWORD(idx), xmm1, 1 ; min index (0...7)
165	DBGPRINTL64 "FLUSH min_length", len2
166	DBGPRINTL64 "FLUSH min_length index ", idx
167	cmp len2, 0
168	je len_is_0
169
170	vpbroadcastw xmm1, xmm1
171	DBGPRINTL_XMM "FLUSH lens after shuffle", xmm1
172
173	vpsubw xmm0, xmm0, xmm1
174	vmovdqa [state + _lens], xmm0
175	DBGPRINTL_XMM "FLUSH lens immediately after min subtraction", xmm0
176
177	; "state" and "args" are the same address, arg1
178	; len is arg2
179	call sha1_x8_avx2
180	; state and idx are intact
181
182	len_is_0:
183	; process completed job "idx"
184	imul lane_data, idx, _HMAC_SHA1_LANE_DATA_size
185	lea lane_data, [state + _ldata + lane_data]
186	mov DWORD(extra_blocks), [lane_data + _extra_blocks]
187	cmp extra_blocks, 0
188	jne proc_extra_blocks
189	cmp dword [lane_data + _outer_done], 0
190	jne end_loop
191
192	proc_outer:
193	mov dword [lane_data + _outer_done], 1
194	mov DWORD(size_offset), [lane_data + _size_offset]
195	mov qword [lane_data + _extra_block + size_offset], 0
196	mov word [state + _lens + 2*idx], 1
197	lea tmp, [lane_data + _outer_block]
198	mov job, [lane_data + _job_in_lane]
199	mov [state + _args_data_ptr + PTR_SZ*idx], tmp
200
201	vmovd xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 0SHA1_DIGEST_ROW_SIZE]
202	vpinsrd xmm0, xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 1SHA1_DIGEST_ROW_SIZE], 1
203	vpinsrd xmm0, xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 2SHA1_DIGEST_ROW_SIZE], 2
204	vpinsrd xmm0, xmm0, [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 3SHA1_DIGEST_ROW_SIZE], 3
205	vpshufb xmm0, xmm0, [rel byteswap]
206	mov DWORD(tmp), [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 4SHA1_DIGEST_ROW_SIZE]
207	bswap DWORD(tmp)
208	vmovdqa [lane_data + _outer_block], xmm0
209	mov [lane_data + _outer_block + 4*4], DWORD(tmp)
210
211	mov tmp, [job + _auth_key_xor_opad]
212	vmovdqu xmm0, [tmp]
213	mov DWORD(tmp), [tmp + 4*4]
214	vmovd [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 0SHA1_DIGEST_ROW_SIZE], xmm0
215	vpextrd [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 1SHA1_DIGEST_ROW_SIZE], xmm0, 1
216	vpextrd [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 2SHA1_DIGEST_ROW_SIZE], xmm0, 2
217	vpextrd [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 3SHA1_DIGEST_ROW_SIZE], xmm0, 3
218	mov [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 4SHA1_DIGEST_ROW_SIZE], DWORD(tmp)
219	jmp copy_lane_data
220
221	align 16
222	proc_extra_blocks:
223	mov DWORD(start_offset), [lane_data + _start_offset]
224	mov [state + _lens + 2*idx], WORD(extra_blocks)
225	lea tmp, [lane_data + _extra_block + start_offset]
226	mov [state + _args_data_ptr + PTR_SZ*idx], tmp
227	mov dword [lane_data + _extra_blocks], 0
228	jmp copy_lane_data
229
230	return_null:
231	xor job_rax, job_rax
232	jmp return
233
234	align 16
235	end_loop:
236	mov job_rax, [lane_data + _job_in_lane]
237	mov qword [lane_data + _job_in_lane], 0
238	or dword [job_rax + _status], STS_COMPLETED_HMAC
239	mov unused_lanes, [state + _unused_lanes]
240	shl unused_lanes, 4 ;; a nibble
241	or unused_lanes, idx
242	mov [state + _unused_lanes], unused_lanes
243
244	mov p, [job_rax + _auth_tag_output]
245
246	; copy 12 bytes
247	mov DWORD(tmp2), [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 0SHA1_DIGEST_ROW_SIZE]
248	mov DWORD(tmp4), [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 1SHA1_DIGEST_ROW_SIZE]
9f95a23c	249	mov DWORD(r12), [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 2SHA1_DIGEST_ROW_SIZE]
11fdf7f2 TL	250	bswap DWORD(tmp2)
11fdf7f2 TL	251	bswap DWORD(tmp4)
9f95a23c	252	bswap DWORD(r12)
11fdf7f2 TL	253	mov [p + 0*4], DWORD(tmp2)
11fdf7f2 TL	254	mov [p + 1*4], DWORD(tmp4)
9f95a23c TL	255	mov [p + 2*4], DWORD(r12)
	256
	257	cmp qword [job_rax + _auth_tag_output_len_in_bytes], 12
	258	je return
	259
	260	;; copy remaining 8 bytes to return 20 byte digest
	261	mov DWORD(r13), [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 3SHA1_DIGEST_ROW_SIZE]
	262	mov DWORD(r14), [state + _args_digest + SHA1_DIGEST_WORD_SIZEidx + 4SHA1_DIGEST_ROW_SIZE]
	263	bswap DWORD(r13)
	264	bswap DWORD(r14)
	265	mov [p + 3*SHA1_DIGEST_WORD_SIZE], DWORD(r13)
	266	mov [p + 4*SHA1_DIGEST_WORD_SIZE], DWORD(r14)
11fdf7f2 TL	267
	268	return:
	269	vzeroupper
	270	mov rbp, [rsp + _gpr_save + 8*0]
	271	mov r12, [rsp + _gpr_save + 8*1]
	272	mov r13, [rsp + _gpr_save + 8*2]
	273	mov r14, [rsp + _gpr_save + 8*3]
	274	mov r15, [rsp + _gpr_save + 8*4]
	275	mov rsp, [rsp + _rsp_save]
	276	ret
	277
	278	%ifdef LINUX
	279	section .note.GNU-stack noalloc noexec nowrite progbits
	280	%endif