WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/ffmpeg/libavcodec/arm/mdct_vfp.S

Rev	Author	Line No.	Line
4349	Serge	1	/*
		2	* Copyright (c) 2013 RISC OS Open Ltd
		3	* Author: Ben Avison
		4	*
		5	* This file is part of FFmpeg.
		6	*
		7	* FFmpeg is free software; you can redistribute it and/or
		8	* modify it under the terms of the GNU Lesser General Public
		9	* License as published by the Free Software Foundation; either
		10	* version 2.1 of the License, or (at your option) any later version.
		11	*
		12	* FFmpeg is distributed in the hope that it will be useful,
		13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		15	* Lesser General Public License for more details.
		16	*
		17	* You should have received a copy of the GNU Lesser General Public
		18	* License along with FFmpeg; if not, write to the Free Software
		19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
		20	*/
		21
		22	#include "libavutil/arm/asm.S"
		23
		24	CONTEXT .req a1
		25	ORIGOUT .req a2
		26	IN .req a3
		27	OUT .req v1
		28	REVTAB .req v2
		29	TCOS .req v3
		30	TSIN .req v4
		31	OLDFPSCR .req v5
		32	J0 .req a2
		33	J1 .req a4
		34	J2 .req ip
		35	J3 .req lr
		36
		37	.macro prerotation_innerloop
		38	.set trig_lo, k
		39	.set trig_hi, n4 - k - 2
		40	.set in_lo, trig_lo * 2
		41	.set in_hi, trig_hi * 2
		42	vldr d8, [TCOS, #trig_lo*4] @ s16,s17
		43	vldr d9, [TCOS, #trig_hi*4] @ s18,s19
		44	vldr s0, [IN, #in_hi*4 + 12]
		45	vldr s1, [IN, #in_hi*4 + 4]
		46	vldr s2, [IN, #in_lo*4 + 12]
		47	vldr s3, [IN, #in_lo*4 + 4]
		48	vmul.f s8, s0, s16 @ vector operation
		49	vldr d10, [TSIN, #trig_lo*4] @ s20,s21
		50	vldr d11, [TSIN, #trig_hi*4] @ s22,s23
		51	vldr s4, [IN, #in_lo*4]
		52	vldr s5, [IN, #in_lo*4 + 8]
		53	vldr s6, [IN, #in_hi*4]
		54	vldr s7, [IN, #in_hi*4 + 8]
		55	ldr J0, [REVTAB, #trig_lo*2]
		56	vmul.f s12, s0, s20 @ vector operation
		57	ldr J2, [REVTAB, #trig_hi*2]
		58	mov J1, J0, lsr #16
		59	and J0, J0, #255 @ halfword value will be < n4
		60	vmls.f s8, s4, s20 @ vector operation
		61	mov J3, J2, lsr #16
		62	and J2, J2, #255 @ halfword value will be < n4
		63	add J0, OUT, J0, lsl #3
		64	vmla.f s12, s4, s16 @ vector operation
		65	add J1, OUT, J1, lsl #3
		66	add J2, OUT, J2, lsl #3
		67	add J3, OUT, J3, lsl #3
		68	vstr s8, [J0]
		69	vstr s9, [J1]
		70	vstr s10, [J2]
		71	vstr s11, [J3]
		72	vstr s12, [J0, #4]
		73	vstr s13, [J1, #4]
		74	vstr s14, [J2, #4]
		75	vstr s15, [J3, #4]
		76	.set k, k + 2
		77	.endm
		78
		79	.macro postrotation_innerloop tail, head
		80	.set trig_lo_head, n8 - k - 2
		81	.set trig_hi_head, n8 + k
		82	.set out_lo_head, trig_lo_head * 2
		83	.set out_hi_head, trig_hi_head * 2
		84	.set trig_lo_tail, n8 - (k - 2) - 2
		85	.set trig_hi_tail, n8 + (k - 2)
		86	.set out_lo_tail, trig_lo_tail * 2
		87	.set out_hi_tail, trig_hi_tail * 2
		88	.if (k & 2) == 0
		89	TCOS_D0_HEAD .req d10 @ s20,s21
		90	TCOS_D1_HEAD .req d11 @ s22,s23
		91	TCOS_S0_TAIL .req s24
		92	.else
		93	TCOS_D0_HEAD .req d12 @ s24,s25
		94	TCOS_D1_HEAD .req d13 @ s26,s27
		95	TCOS_S0_TAIL .req s20
		96	.endif
		97	.ifnc "\tail",""
		98	vmls.f s8, s0, TCOS_S0_TAIL @ vector operation
		99	.endif
		100	.ifnc "\head",""
		101	vldr d8, [TSIN, #trig_lo_head*4] @ s16,s17
		102	vldr d9, [TSIN, #trig_hi_head*4] @ s18,s19
		103	vldr TCOS_D0_HEAD, [TCOS, #trig_lo_head*4]
		104	.endif
		105	.ifnc "\tail",""
		106	vmla.f s12, s4, TCOS_S0_TAIL @ vector operation
		107	.endif
		108	.ifnc "\head",""
		109	vldr s0, [OUT, #out_lo_head*4]
		110	vldr s1, [OUT, #out_lo_head*4 + 8]
		111	vldr s2, [OUT, #out_hi_head*4]
		112	vldr s3, [OUT, #out_hi_head*4 + 8]
		113	vldr s4, [OUT, #out_lo_head*4 + 4]
		114	vldr s5, [OUT, #out_lo_head*4 + 12]
		115	vldr s6, [OUT, #out_hi_head*4 + 4]
		116	vldr s7, [OUT, #out_hi_head*4 + 12]
		117	.endif
		118	.ifnc "\tail",""
		119	vstr s8, [OUT, #out_lo_tail*4]
		120	vstr s9, [OUT, #out_lo_tail*4 + 8]
		121	vstr s10, [OUT, #out_hi_tail*4]
		122	vstr s11, [OUT, #out_hi_tail*4 + 8]
		123	.endif
		124	.ifnc "\head",""
		125	vmul.f s8, s4, s16 @ vector operation
		126	.endif
		127	.ifnc "\tail",""
		128	vstr s12, [OUT, #out_hi_tail*4 + 12]
		129	vstr s13, [OUT, #out_hi_tail*4 + 4]
		130	vstr s14, [OUT, #out_lo_tail*4 + 12]
		131	vstr s15, [OUT, #out_lo_tail*4 + 4]
		132	.endif
		133	.ifnc "\head",""
		134	vmul.f s12, s0, s16 @ vector operation
		135	vldr TCOS_D1_HEAD, [TCOS, #trig_hi_head*4]
		136	.endif
		137	.unreq TCOS_D0_HEAD
		138	.unreq TCOS_D1_HEAD
		139	.unreq TCOS_S0_TAIL
		140	.ifnc "\head",""
		141	.set k, k + 2
		142	.endif
		143	.endm
		144
		145
		146	/* void ff_imdct_half_vfp(FFTContext *s,
		147	* FFTSample *output,
		148	* const FFTSample *input)
		149	*/
		150	function ff_imdct_half_vfp, export=1
		151	ldr ip, [CONTEXT, #5*4] @ mdct_bits
		152	teq ip, #6
		153	it ne
		154	bne X(ff_imdct_half_c) @ only case currently accelerated is the one used by DCA
		155
		156	.set n, 1<<6
		157	.set n2, n/2
		158	.set n4, n/4
		159	.set n8, n/8
		160
		161	push {v1-v5,lr}
		162	vpush {s16-s27}
		163	fmrx OLDFPSCR, FPSCR
		164	ldr lr, =0x03030000 @ RunFast mode, short vectors of length 4, stride 1
		165	fmxr FPSCR, lr
		166	mov OUT, ORIGOUT
		167	ldr REVTAB, [CONTEXT, #2*4]
		168	ldr TCOS, [CONTEXT, #6*4]
		169	ldr TSIN, [CONTEXT, #7*4]
		170
		171	.set k, 0
		172	.rept n8/2
		173	prerotation_innerloop
		174	.endr
		175
		176	fmxr FPSCR, OLDFPSCR
		177	mov a1, OUT
		178	bl X(ff_fft16_vfp)
		179	ldr lr, =0x03030000 @ RunFast mode, short vectors of length 4, stride 1
		180	fmxr FPSCR, lr
		181
		182	.set k, 0
		183	postrotation_innerloop , head
		184	.rept n8/2 - 1
		185	postrotation_innerloop tail, head
		186	.endr
		187	postrotation_innerloop tail
		188
		189	fmxr FPSCR, OLDFPSCR
		190	vpop {s16-s27}
		191	pop {v1-v5,pc}
		192	endfunc
		193
		194	.unreq CONTEXT
		195	.unreq ORIGOUT
		196	.unreq IN
		197	.unreq OUT
		198	.unreq REVTAB
		199	.unreq TCOS
		200	.unreq TSIN
		201	.unreq OLDFPSCR
		202	.unreq J0
		203	.unreq J1
		204	.unreq J2
		205	.unreq J3

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(root)/contrib/sdk/sources/ffmpeg/libavcodec/arm/mdct_vfp.S – Rev 4349