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Diffstat (limited to 'media/libtheora/lib/arm/armloop.s')
| -rw-r--r-- | media/libtheora/lib/arm/armloop.s | 682 |
1 files changed, 682 insertions, 0 deletions
diff --git a/media/libtheora/lib/arm/armloop.s b/media/libtheora/lib/arm/armloop.s new file mode 100644 index 000000000..0a1d4705e --- /dev/null +++ b/media/libtheora/lib/arm/armloop.s @@ -0,0 +1,682 @@ +;******************************************************************** +;* * +;* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. * +;* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * +;* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * +;* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * +;* * +;* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2010 * +;* by the Xiph.Org Foundation and contributors http://www.xiph.org/ * +;* * +;******************************************************************** +; Original implementation: +; Copyright (C) 2009 Robin Watts for Pinknoise Productions Ltd +; last mod: $Id: armloop.s 17481 2010-10-03 22:49:42Z tterribe $ +;******************************************************************** + + AREA |.text|, CODE, READONLY + + ; Explicitly specifying alignment here because some versions of + ; gas don't align code correctly. See + ; http://lists.gnu.org/archive/html/bug-binutils/2011-06/msg00199.html + ; https://bugzilla.mozilla.org/show_bug.cgi?id=920992 + ALIGN + + GET armopts.s + + EXPORT oc_loop_filter_frag_rows_arm + +; Which bit this is depends on the order of packing within a bitfield. +; Hopefully that doesn't change among any of the relevant compilers. +OC_FRAG_CODED_FLAG * 1 + + ; Vanilla ARM v4 version +loop_filter_h_arm PROC + ; r0 = unsigned char *_pix + ; r1 = int _ystride + ; r2 = int *_bv + ; preserves r0-r3 + STMFD r13!,{r3-r6,r14} + MOV r14,#8 + MOV r6, #255 +lfh_arm_lp + LDRB r3, [r0, #-2] ; r3 = _pix[0] + LDRB r12,[r0, #1] ; r12= _pix[3] + LDRB r4, [r0, #-1] ; r4 = _pix[1] + LDRB r5, [r0] ; r5 = _pix[2] + SUB r3, r3, r12 ; r3 = _pix[0]-_pix[3]+4 + ADD r3, r3, #4 + SUB r12,r5, r4 ; r12= _pix[2]-_pix[1] + ADD r12,r12,r12,LSL #1 ; r12= 3*(_pix[2]-_pix[1]) + ADD r12,r12,r3 ; r12= _pix[0]-_pix[3]+3*(_pix[2]-_pix[1])+4 + MOV r12,r12,ASR #3 + LDRSB r12,[r2, r12] + ; Stall (2 on Xscale) + ADDS r4, r4, r12 + CMPGT r6, r4 + EORLT r4, r6, r4, ASR #32 + SUBS r5, r5, r12 + CMPGT r6, r5 + EORLT r5, r6, r5, ASR #32 + STRB r4, [r0, #-1] + STRB r5, [r0], r1 + SUBS r14,r14,#1 + BGT lfh_arm_lp + SUB r0, r0, r1, LSL #3 + LDMFD r13!,{r3-r6,PC} + ENDP + +loop_filter_v_arm PROC + ; r0 = unsigned char *_pix + ; r1 = int _ystride + ; r2 = int *_bv + ; preserves r0-r3 + STMFD r13!,{r3-r6,r14} + MOV r14,#8 + MOV r6, #255 +lfv_arm_lp + LDRB r3, [r0, -r1, LSL #1] ; r3 = _pix[0] + LDRB r12,[r0, r1] ; r12= _pix[3] + LDRB r4, [r0, -r1] ; r4 = _pix[1] + LDRB r5, [r0] ; r5 = _pix[2] + SUB r3, r3, r12 ; r3 = _pix[0]-_pix[3]+4 + ADD r3, r3, #4 + SUB r12,r5, r4 ; r12= _pix[2]-_pix[1] + ADD r12,r12,r12,LSL #1 ; r12= 3*(_pix[2]-_pix[1]) + ADD r12,r12,r3 ; r12= _pix[0]-_pix[3]+3*(_pix[2]-_pix[1])+4 + MOV r12,r12,ASR #3 + LDRSB r12,[r2, r12] + ; Stall (2 on Xscale) + ADDS r4, r4, r12 + CMPGT r6, r4 + EORLT r4, r6, r4, ASR #32 + SUBS r5, r5, r12 + CMPGT r6, r5 + EORLT r5, r6, r5, ASR #32 + STRB r4, [r0, -r1] + STRB r5, [r0], #1 + SUBS r14,r14,#1 + BGT lfv_arm_lp + SUB r0, r0, #8 + LDMFD r13!,{r3-r6,PC} + ENDP + +oc_loop_filter_frag_rows_arm PROC + ; r0 = _ref_frame_data + ; r1 = _ystride + ; r2 = _bv + ; r3 = _frags + ; r4 = _fragi0 + ; r5 = _fragi0_end + ; r6 = _fragi_top + ; r7 = _fragi_bot + ; r8 = _frag_buf_offs + ; r9 = _nhfrags + MOV r12,r13 + STMFD r13!,{r0,r4-r11,r14} + LDMFD r12,{r4-r9} + ADD r2, r2, #127 ; _bv += 127 + CMP r4, r5 ; if(_fragi0>=_fragi0_end) + BGE oslffri_arm_end ; bail + SUBS r9, r9, #1 ; r9 = _nhfrags-1 if (r9<=0) + BLE oslffri_arm_end ; bail + ADD r3, r3, r4, LSL #2 ; r3 = &_frags[fragi] + ADD r8, r8, r4, LSL #2 ; r8 = &_frag_buf_offs[fragi] + SUB r7, r7, r9 ; _fragi_bot -= _nhfrags; +oslffri_arm_lp1 + MOV r10,r4 ; r10= fragi = _fragi0 + ADD r11,r4, r9 ; r11= fragi_end-1=fragi+_nhfrags-1 +oslffri_arm_lp2 + LDR r14,[r3], #4 ; r14= _frags[fragi] _frags++ + LDR r0, [r13] ; r0 = _ref_frame_data + LDR r12,[r8], #4 ; r12= _frag_buf_offs[fragi] _frag_buf_offs++ + TST r14,#OC_FRAG_CODED_FLAG + BEQ oslffri_arm_uncoded + CMP r10,r4 ; if (fragi>_fragi0) + ADD r0, r0, r12 ; r0 = _ref_frame_data + _frag_buf_offs[fragi] + BLGT loop_filter_h_arm + CMP r4, r6 ; if (_fragi0>_fragi_top) + BLGT loop_filter_v_arm + CMP r10,r11 ; if(fragi+1<fragi_end)===(fragi<fragi_end-1) + LDRLT r12,[r3] ; r12 = _frags[fragi+1] + ADD r0, r0, #8 + ADD r10,r10,#1 ; r10 = fragi+1; + ANDLT r12,r12,#OC_FRAG_CODED_FLAG + CMPLT r12,#OC_FRAG_CODED_FLAG ; && _frags[fragi+1].coded==0 + BLLT loop_filter_h_arm + CMP r10,r7 ; if (fragi<_fragi_bot) + LDRLT r12,[r3, r9, LSL #2] ; r12 = _frags[fragi+1+_nhfrags-1] + SUB r0, r0, #8 + ADD r0, r0, r1, LSL #3 + ANDLT r12,r12,#OC_FRAG_CODED_FLAG + CMPLT r12,#OC_FRAG_CODED_FLAG + BLLT loop_filter_v_arm + CMP r10,r11 ; while(fragi<=fragi_end-1) + BLE oslffri_arm_lp2 + MOV r4, r10 ; r4 = fragi0 += _nhfrags + CMP r4, r5 + BLT oslffri_arm_lp1 +oslffri_arm_end + LDMFD r13!,{r0,r4-r11,PC} +oslffri_arm_uncoded + ADD r10,r10,#1 + CMP r10,r11 + BLE oslffri_arm_lp2 + MOV r4, r10 ; r4 = _fragi0 += _nhfrags + CMP r4, r5 + BLT oslffri_arm_lp1 + LDMFD r13!,{r0,r4-r11,PC} + ENDP + + [ OC_ARM_ASM_MEDIA + EXPORT oc_loop_filter_init_v6 + EXPORT oc_loop_filter_frag_rows_v6 + +oc_loop_filter_init_v6 PROC + ; r0 = _bv + ; r1 = _flimit (=L from the spec) + MVN r1, r1, LSL #1 ; r1 = <0xFFFFFF|255-2*L> + AND r1, r1, #255 ; r1 = ll=r1&0xFF + ORR r1, r1, r1, LSL #8 ; r1 = <ll|ll> + PKHBT r1, r1, r1, LSL #16 ; r1 = <ll|ll|ll|ll> + STR r1, [r0] + MOV PC,r14 + ENDP + +; We could use the same strategy as the v filter below, but that would require +; 40 instructions to load the data and transpose it into columns and another +; 32 to write out the results at the end, plus the 52 instructions to do the +; filtering itself. +; This is slightly less, and less code, even assuming we could have shared the +; 52 instructions in the middle with the other function. +; It executes slightly fewer instructions than the ARMv6 approach David Conrad +; proposed for FFmpeg, but not by much: +; http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2010-February/083141.html +; His is a lot less code, though, because it only does two rows at once instead +; of four. +loop_filter_h_v6 PROC + ; r0 = unsigned char *_pix + ; r1 = int _ystride + ; r2 = int _ll + ; preserves r0-r3 + STMFD r13!,{r4-r11,r14} + LDR r12,=0x10003 + BL loop_filter_h_core_v6 + ADD r0, r0, r1, LSL #2 + BL loop_filter_h_core_v6 + SUB r0, r0, r1, LSL #2 + LDMFD r13!,{r4-r11,PC} + ENDP + +loop_filter_h_core_v6 PROC + ; r0 = unsigned char *_pix + ; r1 = int _ystride + ; r2 = int _ll + ; r12= 0x10003 + ; Preserves r0-r3, r12; Clobbers r4-r11. + LDR r4,[r0, #-2]! ; r4 = <p3|p2|p1|p0> + ; Single issue + LDR r5,[r0, r1]! ; r5 = <q3|q2|q1|q0> + UXTB16 r6, r4, ROR #16 ; r6 = <p0|p2> + UXTB16 r4, r4, ROR #8 ; r4 = <p3|p1> + UXTB16 r7, r5, ROR #16 ; r7 = <q0|q2> + UXTB16 r5, r5, ROR #8 ; r5 = <q3|q1> + PKHBT r8, r4, r5, LSL #16 ; r8 = <__|q1|__|p1> + PKHBT r9, r6, r7, LSL #16 ; r9 = <__|q2|__|p2> + SSUB16 r6, r4, r6 ; r6 = <p3-p0|p1-p2> + SMLAD r6, r6, r12,r12 ; r6 = <????|(p3-p0)+3*(p1-p2)+3> + SSUB16 r7, r5, r7 ; r7 = <q3-q0|q1-q2> + SMLAD r7, r7, r12,r12 ; r7 = <????|(q0-q3)+3*(q2-q1)+4> + LDR r4,[r0, r1]! ; r4 = <r3|r2|r1|r0> + MOV r6, r6, ASR #3 ; r6 = <??????|(p3-p0)+3*(p1-p2)+3>>3> + LDR r5,[r0, r1]! ; r5 = <s3|s2|s1|s0> + PKHBT r11,r6, r7, LSL #13 ; r11= <??|-R_q|??|-R_p> + UXTB16 r6, r4, ROR #16 ; r6 = <r0|r2> + UXTB16 r11,r11 ; r11= <__|-R_q|__|-R_p> + UXTB16 r4, r4, ROR #8 ; r4 = <r3|r1> + UXTB16 r7, r5, ROR #16 ; r7 = <s0|s2> + PKHBT r10,r6, r7, LSL #16 ; r10= <__|s2|__|r2> + SSUB16 r6, r4, r6 ; r6 = <r3-r0|r1-r2> + UXTB16 r5, r5, ROR #8 ; r5 = <s3|s1> + SMLAD r6, r6, r12,r12 ; r6 = <????|(r3-r0)+3*(r2-r1)+3> + SSUB16 r7, r5, r7 ; r7 = <r3-r0|r1-r2> + SMLAD r7, r7, r12,r12 ; r7 = <????|(s0-s3)+3*(s2-s1)+4> + ORR r9, r9, r10, LSL #8 ; r9 = <s2|q2|r2|p2> + MOV r6, r6, ASR #3 ; r6 = <??????|(r0-r3)+3*(r2-r1)+4>>3> + PKHBT r10,r4, r5, LSL #16 ; r10= <__|s1|__|r1> + PKHBT r6, r6, r7, LSL #13 ; r6 = <??|-R_s|??|-R_r> + ORR r8, r8, r10, LSL #8 ; r8 = <s1|q1|r1|p1> + UXTB16 r6, r6 ; r6 = <__|-R_s|__|-R_r> + MOV r10,#0 + ORR r6, r11,r6, LSL #8 ; r6 = <-R_s|-R_q|-R_r|-R_p> + ; Single issue + ; There's no min, max or abs instruction. + ; SSUB8 and SEL will work for abs, and we can do all the rest with + ; unsigned saturated adds, which means the GE flags are still all + ; set when we're done computing lflim(abs(R_i),L). + ; This allows us to both add and subtract, and split the results by + ; the original sign of R_i. + SSUB8 r7, r10,r6 + ; Single issue + SEL r7, r7, r6 ; r7 = abs(R_i) + ; Single issue + UQADD8 r4, r7, r2 ; r4 = 255-max(2*L-abs(R_i),0) + ; Single issue + UQADD8 r7, r7, r4 + ; Single issue + UQSUB8 r7, r7, r4 ; r7 = min(abs(R_i),max(2*L-abs(R_i),0)) + ; Single issue + UQSUB8 r4, r8, r7 + UQADD8 r5, r9, r7 + UQADD8 r8, r8, r7 + UQSUB8 r9, r9, r7 + SEL r8, r8, r4 ; r8 = p1+lflim(R_i,L) + SEL r9, r9, r5 ; r9 = p2-lflim(R_i,L) + MOV r5, r9, LSR #24 ; r5 = s2 + STRB r5, [r0,#2]! + MOV r4, r8, LSR #24 ; r4 = s1 + STRB r4, [r0,#-1] + MOV r5, r9, LSR #8 ; r5 = r2 + STRB r5, [r0,-r1]! + MOV r4, r8, LSR #8 ; r4 = r1 + STRB r4, [r0,#-1] + MOV r5, r9, LSR #16 ; r5 = q2 + STRB r5, [r0,-r1]! + MOV r4, r8, LSR #16 ; r4 = q1 + STRB r4, [r0,#-1] + ; Single issue + STRB r9, [r0,-r1]! + ; Single issue + STRB r8, [r0,#-1] + MOV PC,r14 + ENDP + +; This uses the same strategy as the MMXEXT version for x86, except that UHADD8 +; computes (a+b>>1) instead of (a+b+1>>1) like PAVGB. +; This works just as well, with the following procedure for computing the +; filter value, f: +; u = ~UHADD8(p1,~p2); +; v = UHADD8(~p1,p2); +; m = v-u; +; a = m^UHADD8(m^p0,m^~p3); +; f = UHADD8(UHADD8(a,u1),v1); +; where f = 127+R, with R in [-127,128] defined as in the spec. +; This is exactly the same amount of arithmetic as the version that uses PAVGB +; as the basic operator. +; It executes about 2/3 the number of instructions of David Conrad's approach, +; but requires more code, because it does all eight columns at once, instead +; of four at a time. +loop_filter_v_v6 PROC + ; r0 = unsigned char *_pix + ; r1 = int _ystride + ; r2 = int _ll + ; preserves r0-r11 + STMFD r13!,{r4-r11,r14} + LDRD r6, [r0, -r1]! ; r7, r6 = <p5|p1> + LDRD r4, [r0, -r1] ; r5, r4 = <p4|p0> + LDRD r8, [r0, r1]! ; r9, r8 = <p6|p2> + MVN r14,r6 ; r14= ~p1 + LDRD r10,[r0, r1] ; r11,r10= <p7|p3> + ; Filter the first four columns. + MVN r12,r8 ; r12= ~p2 + UHADD8 r14,r14,r8 ; r14= v1=~p1+p2>>1 + UHADD8 r12,r12,r6 ; r12= p1+~p2>>1 + MVN r10, r10 ; r10=~p3 + MVN r12,r12 ; r12= u1=~p1+p2+1>>1 + SSUB8 r14,r14,r12 ; r14= m1=v1-u1 + ; Single issue + EOR r4, r4, r14 ; r4 = m1^p0 + EOR r10,r10,r14 ; r10= m1^~p3 + UHADD8 r4, r4, r10 ; r4 = (m1^p0)+(m1^~p3)>>1 + ; Single issue + EOR r4, r4, r14 ; r4 = a1=m1^((m1^p0)+(m1^~p3)>>1) + SADD8 r14,r14,r12 ; r14= v1=m1+u1 + UHADD8 r4, r4, r12 ; r4 = a1+u1>>1 + MVN r12,r9 ; r12= ~p6 + UHADD8 r4, r4, r14 ; r4 = f1=(a1+u1>>1)+v1>>1 + ; Filter the second four columns. + MVN r14,r7 ; r14= ~p5 + UHADD8 r12,r12,r7 ; r12= p5+~p6>>1 + UHADD8 r14,r14,r9 ; r14= v2=~p5+p6>>1 + MVN r12,r12 ; r12= u2=~p5+p6+1>>1 + MVN r11,r11 ; r11=~p7 + SSUB8 r10,r14,r12 ; r10= m2=v2-u2 + ; Single issue + EOR r5, r5, r10 ; r5 = m2^p4 + EOR r11,r11,r10 ; r11= m2^~p7 + UHADD8 r5, r5, r11 ; r5 = (m2^p4)+(m2^~p7)>>1 + ; Single issue + EOR r5, r5, r10 ; r5 = a2=m2^((m2^p4)+(m2^~p7)>>1) + ; Single issue + UHADD8 r5, r5, r12 ; r5 = a2+u2>>1 + LDR r12,=0x7F7F7F7F ; r12 = {127}x4 + UHADD8 r5, r5, r14 ; r5 = f2=(a2+u2>>1)+v2>>1 + ; Now split f[i] by sign. + ; There's no min or max instruction. + ; We could use SSUB8 and SEL, but this is just as many instructions and + ; dual issues more (for v7 without NEON). + UQSUB8 r10,r4, r12 ; r10= R_i>0?R_i:0 + UQSUB8 r4, r12,r4 ; r4 = R_i<0?-R_i:0 + UQADD8 r11,r10,r2 ; r11= 255-max(2*L-abs(R_i<0),0) + UQADD8 r14,r4, r2 ; r14= 255-max(2*L-abs(R_i>0),0) + UQADD8 r10,r10,r11 + UQADD8 r4, r4, r14 + UQSUB8 r10,r10,r11 ; r10= min(abs(R_i<0),max(2*L-abs(R_i<0),0)) + UQSUB8 r4, r4, r14 ; r4 = min(abs(R_i>0),max(2*L-abs(R_i>0),0)) + UQSUB8 r11,r5, r12 ; r11= R_i>0?R_i:0 + UQADD8 r6, r6, r10 + UQSUB8 r8, r8, r10 + UQSUB8 r5, r12,r5 ; r5 = R_i<0?-R_i:0 + UQSUB8 r6, r6, r4 ; r6 = p1+lflim(R_i,L) + UQADD8 r8, r8, r4 ; r8 = p2-lflim(R_i,L) + UQADD8 r10,r11,r2 ; r10= 255-max(2*L-abs(R_i<0),0) + UQADD8 r14,r5, r2 ; r14= 255-max(2*L-abs(R_i>0),0) + UQADD8 r11,r11,r10 + UQADD8 r5, r5, r14 + UQSUB8 r11,r11,r10 ; r11= min(abs(R_i<0),max(2*L-abs(R_i<0),0)) + UQSUB8 r5, r5, r14 ; r5 = min(abs(R_i>0),max(2*L-abs(R_i>0),0)) + UQADD8 r7, r7, r11 + UQSUB8 r9, r9, r11 + UQSUB8 r7, r7, r5 ; r7 = p5+lflim(R_i,L) + STRD r6, [r0, -r1] ; [p5:p1] = [r7: r6] + UQADD8 r9, r9, r5 ; r9 = p6-lflim(R_i,L) + STRD r8, [r0] ; [p6:p2] = [r9: r8] + LDMFD r13!,{r4-r11,PC} + ENDP + +oc_loop_filter_frag_rows_v6 PROC + ; r0 = _ref_frame_data + ; r1 = _ystride + ; r2 = _bv + ; r3 = _frags + ; r4 = _fragi0 + ; r5 = _fragi0_end + ; r6 = _fragi_top + ; r7 = _fragi_bot + ; r8 = _frag_buf_offs + ; r9 = _nhfrags + MOV r12,r13 + STMFD r13!,{r0,r4-r11,r14} + LDMFD r12,{r4-r9} + LDR r2, [r2] ; ll = *(int *)_bv + CMP r4, r5 ; if(_fragi0>=_fragi0_end) + BGE oslffri_v6_end ; bail + SUBS r9, r9, #1 ; r9 = _nhfrags-1 if (r9<=0) + BLE oslffri_v6_end ; bail + ADD r3, r3, r4, LSL #2 ; r3 = &_frags[fragi] + ADD r8, r8, r4, LSL #2 ; r8 = &_frag_buf_offs[fragi] + SUB r7, r7, r9 ; _fragi_bot -= _nhfrags; +oslffri_v6_lp1 + MOV r10,r4 ; r10= fragi = _fragi0 + ADD r11,r4, r9 ; r11= fragi_end-1=fragi+_nhfrags-1 +oslffri_v6_lp2 + LDR r14,[r3], #4 ; r14= _frags[fragi] _frags++ + LDR r0, [r13] ; r0 = _ref_frame_data + LDR r12,[r8], #4 ; r12= _frag_buf_offs[fragi] _frag_buf_offs++ + TST r14,#OC_FRAG_CODED_FLAG + BEQ oslffri_v6_uncoded + CMP r10,r4 ; if (fragi>_fragi0) + ADD r0, r0, r12 ; r0 = _ref_frame_data + _frag_buf_offs[fragi] + BLGT loop_filter_h_v6 + CMP r4, r6 ; if (fragi0>_fragi_top) + BLGT loop_filter_v_v6 + CMP r10,r11 ; if(fragi+1<fragi_end)===(fragi<fragi_end-1) + LDRLT r12,[r3] ; r12 = _frags[fragi+1] + ADD r0, r0, #8 + ADD r10,r10,#1 ; r10 = fragi+1; + ANDLT r12,r12,#OC_FRAG_CODED_FLAG + CMPLT r12,#OC_FRAG_CODED_FLAG ; && _frags[fragi+1].coded==0 + BLLT loop_filter_h_v6 + CMP r10,r7 ; if (fragi<_fragi_bot) + LDRLT r12,[r3, r9, LSL #2] ; r12 = _frags[fragi+1+_nhfrags-1] + SUB r0, r0, #8 + ADD r0, r0, r1, LSL #3 + ANDLT r12,r12,#OC_FRAG_CODED_FLAG + CMPLT r12,#OC_FRAG_CODED_FLAG + BLLT loop_filter_v_v6 + CMP r10,r11 ; while(fragi<=fragi_end-1) + BLE oslffri_v6_lp2 + MOV r4, r10 ; r4 = fragi0 += nhfrags + CMP r4, r5 + BLT oslffri_v6_lp1 +oslffri_v6_end + LDMFD r13!,{r0,r4-r11,PC} +oslffri_v6_uncoded + ADD r10,r10,#1 + CMP r10,r11 + BLE oslffri_v6_lp2 + MOV r4, r10 ; r4 = fragi0 += nhfrags + CMP r4, r5 + BLT oslffri_v6_lp1 + LDMFD r13!,{r0,r4-r11,PC} + ENDP + ] + + [ OC_ARM_ASM_NEON + EXPORT oc_loop_filter_init_neon + EXPORT oc_loop_filter_frag_rows_neon + +oc_loop_filter_init_neon PROC + ; r0 = _bv + ; r1 = _flimit (=L from the spec) + MOV r1, r1, LSL #1 ; r1 = 2*L + VDUP.S16 Q15, r1 ; Q15= 2L in U16s + VST1.64 {D30,D31}, [r0@128] + MOV PC,r14 + ENDP + +loop_filter_h_neon PROC + ; r0 = unsigned char *_pix + ; r1 = int _ystride + ; r2 = int *_bv + ; preserves r0-r3 + ; We assume Q15= 2*L in U16s + ; My best guesses at cycle counts (and latency)--vvv + SUB r12,r0, #2 + ; Doing a 2-element structure load saves doing two VTRN's below, at the + ; cost of using two more slower single-lane loads vs. the faster + ; all-lane loads. + ; It's less code this way, though, and benches a hair faster, but it + ; leaves D2 and D4 swapped. + VLD2.16 {D0[],D2[]}, [r12], r1 ; D0 = ____________1100 2,1 + ; D2 = ____________3322 + VLD2.16 {D4[],D6[]}, [r12], r1 ; D4 = ____________5544 2,1 + ; D6 = ____________7766 + VLD2.16 {D0[1],D2[1]},[r12], r1 ; D0 = ________99881100 3,1 + ; D2 = ________BBAA3322 + VLD2.16 {D4[1],D6[1]},[r12], r1 ; D4 = ________DDCC5544 3,1 + ; D6 = ________FFEE7766 + VLD2.16 {D0[2],D2[2]},[r12], r1 ; D0 = ____GGHH99881100 3,1 + ; D2 = ____JJIIBBAA3322 + VLD2.16 {D4[2],D6[2]},[r12], r1 ; D4 = ____KKLLDDCC5544 3,1 + ; D6 = ____NNMMFFEE7766 + VLD2.16 {D0[3],D2[3]},[r12], r1 ; D0 = PPOOGGHH99881100 3,1 + ; D2 = RRQQJJIIBBAA3322 + VLD2.16 {D4[3],D6[3]},[r12], r1 ; D4 = TTSSKKLLDDCC5544 3,1 + ; D6 = VVUUNNMMFFEE7766 + VTRN.8 D0, D4 ; D0 = SSOOKKGGCC884400 D4 = TTPPLLHHDD995511 1,1 + VTRN.8 D2, D6 ; D2 = UUQQMMIIEEAA6622 D6 = VVRRNNJJFFBB7733 1,1 + VSUBL.U8 Q0, D0, D6 ; Q0 = 00 - 33 in S16s 1,3 + VSUBL.U8 Q8, D2, D4 ; Q8 = 22 - 11 in S16s 1,3 + ADD r12,r0, #8 + VADD.S16 Q0, Q0, Q8 ; 1,3 + PLD [r12] + VADD.S16 Q0, Q0, Q8 ; 1,3 + PLD [r12,r1] + VADD.S16 Q0, Q0, Q8 ; Q0 = [0-3]+3*[2-1] 1,3 + PLD [r12,r1, LSL #1] + VRSHR.S16 Q0, Q0, #3 ; Q0 = f = ([0-3]+3*[2-1]+4)>>3 1,4 + ADD r12,r12,r1, LSL #2 + ; We want to do + ; f = CLAMP(MIN(-2L-f,0), f, MAX(2L-f,0)) + ; = ((f >= 0) ? MIN( f ,MAX(2L- f ,0)) : MAX( f , MIN(-2L- f ,0))) + ; = ((f >= 0) ? MIN(|f|,MAX(2L-|f|,0)) : MAX(-|f|, MIN(-2L+|f|,0))) + ; = ((f >= 0) ? MIN(|f|,MAX(2L-|f|,0)) :-MIN( |f|,-MIN(-2L+|f|,0))) + ; = ((f >= 0) ? MIN(|f|,MAX(2L-|f|,0)) :-MIN( |f|, MAX( 2L-|f|,0))) + ; So we've reduced the left and right hand terms to be the same, except + ; for a negation. + ; Stall x3 + VABS.S16 Q9, Q0 ; Q9 = |f| in U16s 1,4 + PLD [r12,-r1] + VSHR.S16 Q0, Q0, #15 ; Q0 = -1 or 0 according to sign 1,3 + PLD [r12] + VQSUB.U16 Q10,Q15,Q9 ; Q10= MAX(2L-|f|,0) in U16s 1,4 + PLD [r12,r1] + VMOVL.U8 Q1, D2 ; Q2 = __UU__QQ__MM__II__EE__AA__66__22 2,3 + PLD [r12,r1,LSL #1] + VMIN.U16 Q9, Q10,Q9 ; Q9 = MIN(|f|,MAX(2L-|f|)) 1,4 + ADD r12,r12,r1, LSL #2 + ; Now we need to correct for the sign of f. + ; For negative elements of Q0, we want to subtract the appropriate + ; element of Q9. For positive elements we want to add them. No NEON + ; instruction exists to do this, so we need to negate the negative + ; elements, and we can then just add them. a-b = a-(1+!b) = a-1+!b + VADD.S16 Q9, Q9, Q0 ; 1,3 + PLD [r12,-r1] + VEOR.S16 Q9, Q9, Q0 ; Q9 = real value of f 1,3 + ; Bah. No VRSBW.U8 + ; Stall (just 1 as Q9 not needed to second pipeline stage. I think.) + VADDW.U8 Q2, Q9, D4 ; Q1 = xxTTxxPPxxLLxxHHxxDDxx99xx55xx11 1,3 + VSUB.S16 Q1, Q1, Q9 ; Q2 = xxUUxxQQxxMMxxIIxxEExxAAxx66xx22 1,3 + VQMOVUN.S16 D4, Q2 ; D4 = TTPPLLHHDD995511 1,1 + VQMOVUN.S16 D2, Q1 ; D2 = UUQQMMIIEEAA6622 1,1 + SUB r12,r0, #1 + VTRN.8 D4, D2 ; D4 = QQPPIIHHAA992211 D2 = MMLLEEDD6655 1,1 + VST1.16 {D4[0]}, [r12], r1 + VST1.16 {D2[0]}, [r12], r1 + VST1.16 {D4[1]}, [r12], r1 + VST1.16 {D2[1]}, [r12], r1 + VST1.16 {D4[2]}, [r12], r1 + VST1.16 {D2[2]}, [r12], r1 + VST1.16 {D4[3]}, [r12], r1 + VST1.16 {D2[3]}, [r12], r1 + MOV PC,r14 + ENDP + +loop_filter_v_neon PROC + ; r0 = unsigned char *_pix + ; r1 = int _ystride + ; r2 = int *_bv + ; preserves r0-r3 + ; We assume Q15= 2*L in U16s + ; My best guesses at cycle counts (and latency)--vvv + SUB r12,r0, r1, LSL #1 + VLD1.64 {D0}, [r12@64], r1 ; D0 = SSOOKKGGCC884400 2,1 + VLD1.64 {D2}, [r12@64], r1 ; D2 = TTPPLLHHDD995511 2,1 + VLD1.64 {D4}, [r12@64], r1 ; D4 = UUQQMMIIEEAA6622 2,1 + VLD1.64 {D6}, [r12@64] ; D6 = VVRRNNJJFFBB7733 2,1 + VSUBL.U8 Q8, D4, D2 ; Q8 = 22 - 11 in S16s 1,3 + VSUBL.U8 Q0, D0, D6 ; Q0 = 00 - 33 in S16s 1,3 + ADD r12, #8 + VADD.S16 Q0, Q0, Q8 ; 1,3 + PLD [r12] + VADD.S16 Q0, Q0, Q8 ; 1,3 + PLD [r12,r1] + VADD.S16 Q0, Q0, Q8 ; Q0 = [0-3]+3*[2-1] 1,3 + SUB r12, r0, r1 + VRSHR.S16 Q0, Q0, #3 ; Q0 = f = ([0-3]+3*[2-1]+4)>>3 1,4 + ; We want to do + ; f = CLAMP(MIN(-2L-f,0), f, MAX(2L-f,0)) + ; = ((f >= 0) ? MIN( f ,MAX(2L- f ,0)) : MAX( f , MIN(-2L- f ,0))) + ; = ((f >= 0) ? MIN(|f|,MAX(2L-|f|,0)) : MAX(-|f|, MIN(-2L+|f|,0))) + ; = ((f >= 0) ? MIN(|f|,MAX(2L-|f|,0)) :-MIN( |f|,-MIN(-2L+|f|,0))) + ; = ((f >= 0) ? MIN(|f|,MAX(2L-|f|,0)) :-MIN( |f|, MAX( 2L-|f|,0))) + ; So we've reduced the left and right hand terms to be the same, except + ; for a negation. + ; Stall x3 + VABS.S16 Q9, Q0 ; Q9 = |f| in U16s 1,4 + VSHR.S16 Q0, Q0, #15 ; Q0 = -1 or 0 according to sign 1,3 + ; Stall x2 + VQSUB.U16 Q10,Q15,Q9 ; Q10= MAX(2L-|f|,0) in U16s 1,4 + VMOVL.U8 Q2, D4 ; Q2 = __UU__QQ__MM__II__EE__AA__66__22 2,3 + ; Stall x2 + VMIN.U16 Q9, Q10,Q9 ; Q9 = MIN(|f|,MAX(2L-|f|)) 1,4 + ; Now we need to correct for the sign of f. + ; For negative elements of Q0, we want to subtract the appropriate + ; element of Q9. For positive elements we want to add them. No NEON + ; instruction exists to do this, so we need to negate the negative + ; elements, and we can then just add them. a-b = a-(1+!b) = a-1+!b + ; Stall x3 + VADD.S16 Q9, Q9, Q0 ; 1,3 + ; Stall x2 + VEOR.S16 Q9, Q9, Q0 ; Q9 = real value of f 1,3 + ; Bah. No VRSBW.U8 + ; Stall (just 1 as Q9 not needed to second pipeline stage. I think.) + VADDW.U8 Q1, Q9, D2 ; Q1 = xxTTxxPPxxLLxxHHxxDDxx99xx55xx11 1,3 + VSUB.S16 Q2, Q2, Q9 ; Q2 = xxUUxxQQxxMMxxIIxxEExxAAxx66xx22 1,3 + VQMOVUN.S16 D2, Q1 ; D2 = TTPPLLHHDD995511 1,1 + VQMOVUN.S16 D4, Q2 ; D4 = UUQQMMIIEEAA6622 1,1 + VST1.64 {D2}, [r12@64], r1 + VST1.64 {D4}, [r12@64], r1 + MOV PC,r14 + ENDP + +oc_loop_filter_frag_rows_neon PROC + ; r0 = _ref_frame_data + ; r1 = _ystride + ; r2 = _bv + ; r3 = _frags + ; r4 = _fragi0 + ; r5 = _fragi0_end + ; r6 = _fragi_top + ; r7 = _fragi_bot + ; r8 = _frag_buf_offs + ; r9 = _nhfrags + MOV r12,r13 + STMFD r13!,{r0,r4-r11,r14} + LDMFD r12,{r4-r9} + CMP r4, r5 ; if(_fragi0>=_fragi0_end) + BGE oslffri_neon_end; bail + SUBS r9, r9, #1 ; r9 = _nhfrags-1 if (r9<=0) + BLE oslffri_neon_end ; bail + VLD1.64 {D30,D31}, [r2@128] ; Q15= 2L in U16s + ADD r3, r3, r4, LSL #2 ; r3 = &_frags[fragi] + ADD r8, r8, r4, LSL #2 ; r8 = &_frag_buf_offs[fragi] + SUB r7, r7, r9 ; _fragi_bot -= _nhfrags; +oslffri_neon_lp1 + MOV r10,r4 ; r10= fragi = _fragi0 + ADD r11,r4, r9 ; r11= fragi_end-1=fragi+_nhfrags-1 +oslffri_neon_lp2 + LDR r14,[r3], #4 ; r14= _frags[fragi] _frags++ + LDR r0, [r13] ; r0 = _ref_frame_data + LDR r12,[r8], #4 ; r12= _frag_buf_offs[fragi] _frag_buf_offs++ + TST r14,#OC_FRAG_CODED_FLAG + BEQ oslffri_neon_uncoded + CMP r10,r4 ; if (fragi>_fragi0) + ADD r0, r0, r12 ; r0 = _ref_frame_data + _frag_buf_offs[fragi] + BLGT loop_filter_h_neon + CMP r4, r6 ; if (_fragi0>_fragi_top) + BLGT loop_filter_v_neon + CMP r10,r11 ; if(fragi+1<fragi_end)===(fragi<fragi_end-1) + LDRLT r12,[r3] ; r12 = _frags[fragi+1] + ADD r0, r0, #8 + ADD r10,r10,#1 ; r10 = fragi+1; + ANDLT r12,r12,#OC_FRAG_CODED_FLAG + CMPLT r12,#OC_FRAG_CODED_FLAG ; && _frags[fragi+1].coded==0 + BLLT loop_filter_h_neon + CMP r10,r7 ; if (fragi<_fragi_bot) + LDRLT r12,[r3, r9, LSL #2] ; r12 = _frags[fragi+1+_nhfrags-1] + SUB r0, r0, #8 + ADD r0, r0, r1, LSL #3 + ANDLT r12,r12,#OC_FRAG_CODED_FLAG + CMPLT r12,#OC_FRAG_CODED_FLAG + BLLT loop_filter_v_neon + CMP r10,r11 ; while(fragi<=fragi_end-1) + BLE oslffri_neon_lp2 + MOV r4, r10 ; r4 = _fragi0 += _nhfrags + CMP r4, r5 + BLT oslffri_neon_lp1 +oslffri_neon_end + LDMFD r13!,{r0,r4-r11,PC} +oslffri_neon_uncoded + ADD r10,r10,#1 + CMP r10,r11 + BLE oslffri_neon_lp2 + MOV r4, r10 ; r4 = _fragi0 += _nhfrags + CMP r4, r5 + BLT oslffri_neon_lp1 + LDMFD r13!,{r0,r4-r11,PC} + ENDP + ] + + END |