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/****************************************************************************** Copyright (C) 2000-2001 Andre McCurdy <armccurdy@yahoo.co.uk>** This program is free software. you can redistribute it and/or modify* it under the terms of the GNU General Public License as published by* the Free Software Foundation@ either version 2 of the License, or* (at your option) any later version.** This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY, without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the* GNU General Public License for more details.** You should have received a copy of the GNU General Public License* along with this program@ if not, write to the Free Software* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA******************************************************************************** Notes:********************************************************************************* $Id: imdct_l_arm.S,v 1.1.1.1 2001-11-04 19:37:42 lampret Exp $** 2001/03/24: Andre McCurdy <armccurdy@yahoo.co.uk>* - Corrected PIC unsafe loading of address of 'imdct36_long_karray'** 2000/09/20: Robert Leslie <rob@mars.org>* - Added a global symbol with leading underscore per suggestion of* Simon Burge to support linking with the a.out format.** 2000/09/15: Robert Leslie <rob@mars.org>* - Fixed a small bug where flags were changed before a conditional branch.** 2000/09/15: Andre McCurdy <armccurdy@yahoo.co.uk>* - Applied Nicolas Pitre's rounding optimisation in all remaining places.** 2000/09/09: Nicolas Pitre <nico@cam.org>* - Optimized rounding + scaling operations.** 2000/08/09: Andre McCurdy <armccurdy@yahoo.co.uk>* - Original created.*****************************************************************************//*On entry:r0 = pointer to 18 element input arrayr1 = pointer to 36 element output arrayr2 = windowing block typeStack frame created during execution of the function:Initial Holds:Stackpointerminus:04 lr8 r1112 r1016 r920 r824 r728 r632 r536 r440 r2 : windowing block type44 ct00 high48 ct00 low52 ct01 high56 ct01 low60 ct04 high64 ct04 low68 ct06 high72 ct06 low76 ct05 high80 ct05 low84 ct03 high88 ct03 low92 -ct05 high96 -ct05 low100 -ct07 high104 -ct07 low108 ct07 high112 ct07 low116 ct02 high120 ct02 low*/#define BLOCK_MODE_NORMAL 0#define BLOCK_MODE_START 1#define BLOCK_MODE_STOP 3#define X0 0x00#define X1 0x04#define X2 0x08#define X3 0x0C#define X4 0x10#define X5 0x14#define X6 0x18#define X7 0x1c#define X8 0x20#define X9 0x24#define X10 0x28#define X11 0x2c#define X12 0x30#define X13 0x34#define X14 0x38#define X15 0x3c#define X16 0x40#define X17 0x44#define x0 0x00#define x1 0x04#define x2 0x08#define x3 0x0C#define x4 0x10#define x5 0x14#define x6 0x18#define x7 0x1c#define x8 0x20#define x9 0x24#define x10 0x28#define x11 0x2c#define x12 0x30#define x13 0x34#define x14 0x38#define x15 0x3c#define x16 0x40#define x17 0x44#define x18 0x48#define x19 0x4c#define x20 0x50#define x21 0x54#define x22 0x58#define x23 0x5c#define x24 0x60#define x25 0x64#define x26 0x68#define x27 0x6c#define x28 0x70#define x29 0x74#define x30 0x78#define x31 0x7c#define x32 0x80#define x33 0x84#define x34 0x88#define x35 0x8c#define K00 0x0ffc19fd#define K01 0x00b2aa3e#define K02 0x0fdcf549#define K03 0x0216a2a2#define K04 0x0f9ee890#define K05 0x03768962#define K06 0x0f426cb5#define K07 0x04cfb0e2#define K08 0x0ec835e8#define K09 0x061f78aa#define K10 0x0e313245#define K11 0x07635284#define K12 0x0d7e8807#define K13 0x0898c779#define K14 0x0cb19346#define K15 0x09bd7ca0#define K16 0x0bcbe352#define K17 0x0acf37ad#define minus_K02 0xf0230ab7#define WL0 0x00b2aa3e#define WL1 0x0216a2a2#define WL2 0x03768962#define WL3 0x04cfb0e2#define WL4 0x061f78aa#define WL5 0x07635284#define WL6 0x0898c779#define WL7 0x09bd7ca0#define WL8 0x0acf37ad#define WL9 0x0bcbe352#define WL10 0x0cb19346#define WL11 0x0d7e8807#define WL12 0x0e313245#define WL13 0x0ec835e8#define WL14 0x0f426cb5#define WL15 0x0f9ee890#define WL16 0x0fdcf549#define WL17 0x0ffc19fd@*****************************************************************************.text.align.global III_imdct_l.global _III_imdct_lIII_imdct_l:_III_imdct_l:stmdb sp!, { r2, r4 - r11, lr } @ all callee saved regs, plus arg3ldr r4, =K08 @ r4 = K08ldr r5, =K09 @ r5 = K09ldr r8, [r0, #X4] @ r8 = X4ldr r9, [r0, #X13] @ r9 = X13rsb r6, r4, #0 @ r6 = -K08rsb r7, r5, #0 @ r7 = -K09smull r2, r3, r4, r8 @ r2..r3 = (X4 * K08)smlal r2, r3, r5, r9 @ r2..r3 = (X4 * K08) + (X13 * K09) = ct01smull r10, lr, r8, r5 @ r10..lr = (X4 * K09)smlal r10, lr, r9, r6 @ r10..lr = (X4 * K09) + (X13 * -K08) = ct00ldr r8, [r0, #X7] @ r8 = X7ldr r9, [r0, #X16] @ r9 = X16stmdb sp!, { r2, r3, r10, lr } @ stack ct00_h, ct00_l, ct01_h, ct01_ladd r8, r8, r9 @ r8 = (X7 + X16)ldr r9, [r0, #X1] @ r9 = X1smlal r2, r3, r6, r8 @ r2..r3 = ct01 + ((X7 + X16) * -K08)smlal r2, r3, r7, r9 @ r2..r3 += (X1 * -K09)ldr r7, [r0, #X10] @ r7 = X10rsbs r10, r10, #0rsc lr, lr, #0 @ r10..lr = -ct00smlal r2, r3, r5, r7 @ r2..r3 += (X10 * K09) = ct06smlal r10, lr, r9, r6 @ r10..lr = -ct00 + ( X1 * -K08)smlal r10, lr, r8, r5 @ r10..lr += ((X7 + X16) * K09)smlal r10, lr, r7, r4 @ r10..lr += ( X10 * K08) = ct04stmdb sp!, { r2, r3, r10, lr } @ stack ct04_h, ct04_l, ct06_h, ct06_l@----ldr r7, [r0, #X0]ldr r8, [r0, #X11]ldr r9, [r0, #X12]sub r7, r7, r8sub r7, r7, r9 @ r7 = (X0 - X11 -X12) = ct14ldr r9, [r0, #X3]ldr r8, [r0, #X8]ldr r11, [r0, #X15]sub r8, r8, r9add r8, r8, r11 @ r8 = (X8 - X3 + X15) = ct16add r11, r7, r8 @ r11 = ct14 + ct16 = ct18smlal r2, r3, r6, r11 @ r2..r3 = ct06 + ((X0 - X11 - X3 + X15 + X8 - X12) * -K08)ldr r6, [r0, #X2]ldr r9, [r0, #X9]ldr r12, [r0, #X14]sub r6, r6, r9sub r6, r6, r12 @ r6 = (X2 - X9 - X14) = ct15ldr r9, [r0, #X5]ldr r12, [r0, #X6]sub r9, r9, r12ldr r12, [r0, #X17]sub r9, r9, r12 @ r9 = (X5 - X6 - X17) = ct17add r12, r9, r6 @ r12 = ct15 + ct17 = ct19smlal r2, r3, r5, r12 @ r2..r3 += ((X2 - X9 + X5 - X6 - X17 - X14) * K09)smlal r10, lr, r11, r5 @ r10..lr = ct04 + (ct18 * K09)smlal r10, lr, r12, r4 @ r10..lr = ct04 + (ct18 * K09) + (ct19 * K08)movs r2, r2, lsr #28adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3str r2, [r1, #x22] @ store result x22movs r10, r10, lsr #28adc r10, r10, lr, lsl #4 @ r10 = bits[59..28] of r10..lrstr r10, [r1, #x4] @ store result x4@----ldmia sp, { r2, r3, r4, r5 } @ r2..r3 = ct06, r4..r5 = ct04 (dont update sp)@ r2..r3 = ct06@ r4..r5 = ct04@ r6 = ct15@ r7 = ct14@ r8 = ct16@ r9 = ct17@ r10 = .@ r11 = .@ r12 = .@ lr = .ldr r10, =K03 @ r10 = K03ldr lr, =K15 @ lr = K15smlal r2, r3, r10, r7 @ r2..r3 = ct06 + (ct14 * K03)smlal r4, r5, lr, r7 @ r4..r5 = ct04 + (ct14 * K15)ldr r12, =K14 @ r12 = K14rsb r10, r10, #0 @ r10 = -K03smlal r2, r3, lr, r6 @ r2..r3 += (ct15 * K15)smlal r4, r5, r10, r6 @ r4..r5 += (ct15 * -K03)smlal r2, r3, r12, r8 @ r2..r3 += (ct16 * K14)ldr r11, =minus_K02 @ r11 = -K02rsb r12, r12, #0 @ r12 = -K14smlal r4, r5, r12, r9 @ r4..r5 += (ct17 * -K14)smlal r2, r3, r11, r9 @ r2..r3 += (ct17 * -K02)smlal r4, r5, r11, r8 @ r4..r5 += (ct16 * -K02)movs r2, r2, lsr #28adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3str r2, [r1, #x7] @ store result x7movs r4, r4, lsr #28adc r4, r4, r5, lsl #4 @ r4 = bits[59..28] of r4..r5str r4, [r1, #x1] @ store result x1@----ldmia sp, { r2, r3, r4, r5 } @ r2..r3 = ct06, r4..r5 = ct04 (dont update sp)@ r2..r3 = ct06@ r4..r5 = ct04@ r6 = ct15@ r7 = ct14@ r8 = ct16@ r9 = ct17@ r10 = -K03@ r11 = -K02@ r12 = -K14@ lr = K15rsbs r2, r2, #0rsc r3, r3, #0 @ r2..r3 = -ct06smlal r2, r3, r12, r7 @ r2..r3 = -ct06 + (ct14 * -K14)smlal r2, r3, r10, r8 @ r2..r3 += (ct16 * -K03)smlal r4, r5, r12, r6 @ r4..r5 = ct04 + (ct15 * -K14)smlal r4, r5, r10, r9 @ r4..r5 += (ct17 * -K03)smlal r4, r5, lr, r8 @ r4..r5 += (ct16 * K15)smlal r4, r5, r11, r7 @ r4..r5 += (ct14 * -K02)rsb lr, lr, #0 @ lr = -K15rsb r11, r11, #0 @ r11 = K02smlal r2, r3, lr, r9 @ r2..r3 += (ct17 * -K15)smlal r2, r3, r11, r6 @ r2..r3 += (ct15 * K02)movs r4, r4, lsr #28adc r4, r4, r5, lsl #4 @ r4 = bits[59..28] of r4..r5str r4, [r1, #x25] @ store result x25movs r2, r2, lsr #28adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3str r2, [r1, #x19] @ store result x19@----ldr r2, [sp, #16] @ r2 = ct01_lldr r3, [sp, #20] @ r3 = ct01_hldr r6, [r0, #X1]ldr r8, [r0, #X7]ldr r9, [r0, #X10]ldr r7, [r0, #X16]rsbs r2, r2, #0rsc r3, r3, #0 @ r2..r3 = -ct01mov r4, r2mov r5, r3 @ r4..r5 = -ct01@ r2..r3 = -ct01@ r4..r5 = -ct01@ r6 = X1@ r7 = X16@ r8 = X7@ r9 = X10@ r10 = -K03@ r11 = K02@ r12 = -K14@ lr = -K15smlal r4, r5, r12, r7 @ r4..r5 = -ct01 + (X16 * -K14)smlal r2, r3, lr, r9 @ r2..r3 = -ct01 + (X10 * -K15)smlal r4, r5, r10, r8 @ r4..r5 += (X7 * -K03)smlal r2, r3, r10, r7 @ r2..r3 += (X16 * -K03)smlal r4, r5, r11, r9 @ r4..r5 += (X10 * K02)smlal r2, r3, r12, r8 @ r2..r3 += (X7 * -K14)rsb lr, lr, #0 @ lr = K15rsb r11, r11, #0 @ r11 = -K02smlal r4, r5, lr, r6 @ r4..r5 += (X1 * K15) = ct05smlal r2, r3, r11, r6 @ r2..r3 += (X1 * -K02) = ct03stmdb sp!, { r2, r3, r4, r5 } @ stack ct05_h, ct05_l, ct03_h, ct03_lrsbs r4, r4, #0rsc r5, r5, #0 @ r4..r5 = -ct05stmdb sp!, { r4, r5 } @ stack -ct05_h, -ct05_lldr r2, [sp, #48] @ r2 = ct00_lldr r3, [sp, #52] @ r3 = ct00_hrsb r10, r10, #0 @ r10 = K03rsbs r4, r2, #0rsc r5, r3, #0 @ r4..r5 = -ct00@ r2..r3 = ct00@ r4..r5 = -ct00@ r6 = X1@ r7 = X16@ r8 = X7@ r9 = X10@ r10 = K03@ r11 = -K02@ r12 = -K14@ lr = K15smlal r4, r5, r10, r6 @ r4..r5 = -ct00 + (X1 * K03)smlal r2, r3, r10, r9 @ r2..r3 = ct00 + (X10 * K03)smlal r4, r5, r12, r9 @ r4..r5 += (X10 * -K14)smlal r2, r3, r12, r6 @ r2..r3 += (X1 * -K14)smlal r4, r5, r11, r7 @ r4..r5 += (X16 * -K02)smlal r4, r5, lr, r8 @ r4..r5 += (X7 * K15) = ct07rsb lr, lr, #0 @ lr = -K15rsb r11, r11, #0 @ r11 = K02smlal r2, r3, r11, r8 @ r2..r3 += (X7 * K02)smlal r2, r3, lr, r7 @ r2..r3 += (X16 * -K15) = ct02rsbs r6, r4, #0rsc r7, r5, #0 @ r6..r7 = -ct07stmdb sp!, { r2 - r7 } @ stack -ct07_h, -ct07_l, ct07_h, ct07_l, ct02_h, ct02_l@----add r2, pc, #(imdct36_long_karray-.-8) @ r2 = base address of Knn array (PIC safe ?)loop:ldr r12, [r0, #X0]ldmia r2!, { r5 - r11 } @ first 7 words from Karray elementsmull r3, r4, r5, r12 @ sum = (Kxx * X0)ldr r12, [r0, #X2]ldr r5, [r0, #X3]smlal r3, r4, r6, r12 @ sum += (Kxx * X2)ldr r12, [r0, #X5]ldr r6, [r0, #X6]smlal r3, r4, r7, r5 @ sum += (Kxx * X3)smlal r3, r4, r8, r12 @ sum += (Kxx * X5)ldr r12, [r0, #X8]ldr r5, [r0, #X9]smlal r3, r4, r9, r6 @ sum += (Kxx * X6)smlal r3, r4, r10, r12 @ sum += (Kxx * X8)smlal r3, r4, r11, r5 @ sum += (Kxx * X9)ldmia r2!, { r5 - r10 } @ final 6 words from Karray elementldr r11, [r0, #X11]ldr r12, [r0, #X12]smlal r3, r4, r5, r11 @ sum += (Kxx * X11)ldr r11, [r0, #X14]ldr r5, [r0, #X15]smlal r3, r4, r6, r12 @ sum += (Kxx * X12)smlal r3, r4, r7, r11 @ sum += (Kxx * X14)ldr r11, [r0, #X17]smlal r3, r4, r8, r5 @ sum += (Kxx * X15)smlal r3, r4, r9, r11 @ sum += (Kxx * X17)add r5, sp, r10, lsr #16 @ create index back into stack for required ctxxldmia r5, { r6, r7 } @ r6..r7 = ctxxmov r8, r10, lsl #16 @ push ctxx index off the top endadds r3, r3, r6 @ add low wordsadc r4, r4, r7 @ add high words, with carrymovs r3, r3, lsr #28adc r3, r3, r4, lsl #4 @ r3 = bits[59..28] of r3..r4str r3, [r1, r8, lsr #24] @ push completion flag off the bottom endmovs r8, r8, lsl #8 @ push result location index off the top endbeq loop @ loop back if completion flag not setb imdct_l_windowing @ branch to windowing stage if looping finishedimdct36_long_karray:.word K17, -K13, K10, -K06, -K05, K01, -K00, K04, -K07, K11, K12, -K16, 0x00000000.word K13, K07, K16, K01, K10, -K05, K04, -K11, K00, -K17, K06, -K12, 0x00200800.word K11, K17, K05, K12, -K01, K06, -K07, K00, -K13, K04, -K16, K10, 0x00200c00.word K07, K00, -K12, K05, -K16, -K10, K11, -K17, K04, K13, K01, K06, 0x00001400.word K05, K10, -K00, -K17, K07, -K13, K12, K06, -K16, K01, -K11, -K04, 0x00181800.word K01, K05, -K07, -K11, K13, K17, -K16, -K12, K10, K06, -K04, -K00, 0x00102000.word -K16, K12, -K11, K07, K04, -K00, -K01, K05, -K06, K10, K13, -K17, 0x00284800.word -K12, K06, K17, -K00, -K11, K04, K05, -K10, K01, K16, -K07, -K13, 0x00085000.word -K10, K16, K04, -K13, -K00, K07, K06, -K01, -K12, -K05, K17, K11, 0x00105400.word -K06, -K01, K13, K04, K17, -K11, -K10, -K16, -K05, K12, K00, K07, 0x00185c00.word -K04, -K11, -K01, K16, K06, K12, K13, -K07, -K17, -K00, -K10, -K05, 0x00006000.word -K00, -K04, -K06, -K10, -K12, -K16, -K17, -K13, -K11, -K07, -K05, -K01, 0x00206801@----@-------------------------------------------------------------------------@----imdct_l_windowing:ldr r11, [sp, #80] @ fetch function parameter 3 from out of the stackldmia r1!, { r0, r2 - r9 } @ load 9 words from x0, update pointer@ r0 = x0@ r1 = &x[9]@ r2 = x1@ r3 = x2@ r4 = x3@ r5 = x4@ r6 = x5@ r7 = x6@ r8 = x7@ r9 = x8@ r10 = .@ r11 = window mode: (0 == normal), (1 == start block), (3 == stop block)@ r12 = .@ lr = .cmp r11, #BLOCK_MODE_STOP @ setup flagsrsb r10, r0, #0 @ r10 = -x0 (DONT change flags !!)beq stop_block_x0_to_x17@ start and normal blocks are treated the same for x[0]..x[17]normal_block_x0_to_x17:ldr r12, =WL9 @ r12 = window_l[9]rsb r0, r9, #0 @ r0 = -x8rsb r9, r2, #0 @ r9 = -x1rsb r2, r8, #0 @ r2 = -x7rsb r8, r3, #0 @ r8 = -x2rsb r3, r7, #0 @ r3 = -x6rsb r7, r4, #0 @ r7 = -x3rsb r4, r6, #0 @ r4 = -x5rsb r6, r5, #0 @ r6 = -x4@ r0 = -x8@ r1 = &x[9]@ r2 = -x7@ r3 = -x6@ r4 = -x5@ r5 = .@ r6 = -x4@ r7 = -x3@ r8 = -x2@ r9 = -x1@ r10 = -x0@ r11 = window mode: (0 == normal), (1 == start block), (3 == stop block)@ r12 = window_l[9]@ lr = .smull r5, lr, r12, r0 @ r5..lr = (window_l[9] * (x[9] == -x[8]))ldr r12, =WL10 @ r12 = window_l[10]movs r5, r5, lsr #28adc r0, r5, lr, lsl #4 @ r0 = bits[59..28] of windowed x9smull r5, lr, r12, r2 @ r5..lr = (window_l[10] * (x[10] == -x[7]))ldr r12, =WL11 @ r12 = window_l[11]movs r5, r5, lsr #28adc r2, r5, lr, lsl #4 @ r2 = bits[59..28] of windowed x10smull r5, lr, r12, r3 @ r5..lr = (window_l[11] * (x[11] == -x[6]))ldr r12, =WL12 @ r12 = window_l[12]movs r5, r5, lsr #28adc r3, r5, lr, lsl #4 @ r3 = bits[59..28] of windowed x11smull r5, lr, r12, r4 @ r5..lr = (window_l[12] * (x[12] == -x[5]))ldr r12, =WL13 @ r12 = window_l[13]movs r5, r5, lsr #28adc r4, r5, lr, lsl #4 @ r4 = bits[59..28] of windowed x12smull r5, lr, r12, r6 @ r5..lr = (window_l[13] * (x[13] == -x[4]))ldr r12, =WL14 @ r12 = window_l[14]movs r5, r5, lsr #28adc r6, r5, lr, lsl #4 @ r6 = bits[59..28] of windowed x13smull r5, lr, r12, r7 @ r5..lr = (window_l[14] * (x[14] == -x[3]))ldr r12, =WL15 @ r12 = window_l[15]movs r5, r5, lsr #28adc r7, r5, lr, lsl #4 @ r7 = bits[59..28] of windowed x14smull r5, lr, r12, r8 @ r5..lr = (window_l[15] * (x[15] == -x[2]))ldr r12, =WL16 @ r12 = window_l[16]movs r5, r5, lsr #28adc r8, r5, lr, lsl #4 @ r8 = bits[59..28] of windowed x15smull r5, lr, r12, r9 @ r5..lr = (window_l[16] * (x[16] == -x[1]))ldr r12, =WL17 @ r12 = window_l[17]movs r5, r5, lsr #28adc r9, r5, lr, lsl #4 @ r9 = bits[59..28] of windowed x16smull r5, lr, r12, r10 @ r5..lr = (window_l[17] * (x[17] == -x[0]))ldr r12, =WL0 @ r12 = window_l[0]movs r5, r5, lsr #28adc r10, r5, lr, lsl #4 @ r10 = bits[59..28] of windowed x17stmia r1, { r0, r2 - r4, r6 - r10 } @ store windowed x[9] .. x[17]ldmdb r1!, { r0, r2 - r9 } @ load 9 words downto (and including) x0smull r10, lr, r12, r0 @ r10..lr = (window_l[0] * x[0])ldr r12, =WL1 @ r12 = window_l[1]movs r10, r10, lsr #28adc r0, r10, lr, lsl #4 @ r0 = bits[59..28] of windowed x0smull r10, lr, r12, r2 @ r10..lr = (window_l[1] * x[1])ldr r12, =WL2 @ r12 = window_l[2]movs r10, r10, lsr #28adc r2, r10, lr, lsl #4 @ r2 = bits[59..28] of windowed x1smull r10, lr, r12, r3 @ r10..lr = (window_l[2] * x[2])ldr r12, =WL3 @ r12 = window_l[3]movs r10, r10, lsr #28adc r3, r10, lr, lsl #4 @ r3 = bits[59..28] of windowed x2smull r10, lr, r12, r4 @ r10..lr = (window_l[3] * x[3])ldr r12, =WL4 @ r12 = window_l[4]movs r10, r10, lsr #28adc r4, r10, lr, lsl #4 @ r4 = bits[59..28] of windowed x3smull r10, lr, r12, r5 @ r10..lr = (window_l[4] * x[4])ldr r12, =WL5 @ r12 = window_l[5]movs r10, r10, lsr #28adc r5, r10, lr, lsl #4 @ r5 = bits[59..28] of windowed x4smull r10, lr, r12, r6 @ r10..lr = (window_l[5] * x[5])ldr r12, =WL6 @ r12 = window_l[6]movs r10, r10, lsr #28adc r6, r10, lr, lsl #4 @ r6 = bits[59..28] of windowed x5smull r10, lr, r12, r7 @ r10..lr = (window_l[6] * x[6])ldr r12, =WL7 @ r12 = window_l[7]movs r10, r10, lsr #28adc r7, r10, lr, lsl #4 @ r7 = bits[59..28] of windowed x6smull r10, lr, r12, r8 @ r10..lr = (window_l[7] * x[7])ldr r12, =WL8 @ r12 = window_l[8]movs r10, r10, lsr #28adc r8, r10, lr, lsl #4 @ r8 = bits[59..28] of windowed x7smull r10, lr, r12, r9 @ r10..lr = (window_l[8] * x[8])movs r10, r10, lsr #28adc r9, r10, lr, lsl #4 @ r9 = bits[59..28] of windowed x8stmia r1, { r0, r2 - r9 } @ store windowed x[0] .. x[8]cmp r11, #BLOCK_MODE_STARTbeq start_block_x18_to_x35@----normal_block_x18_to_x35:ldr r11, =WL3 @ r11 = window_l[3]ldr r12, =WL4 @ r12 = window_l[4]add r1, r1, #(18*4) @ r1 = &x[18]ldmia r1!, { r0, r2 - r4, r6 - r10 } @ load 9 words from x18, update pointer@ r0 = x18@ r1 = &x[27]@ r2 = x19@ r3 = x20@ r4 = x21@ r5 = .@ r6 = x22@ r7 = x23@ r8 = x24@ r9 = x25@ r10 = x26@ r11 = window_l[3]@ r12 = window_l[4]@ lr = .smull r5, lr, r12, r6 @ r5..lr = (window_l[4] * (x[22] == x[31]))movs r5, r5, lsr #28adc r5, r5, lr, lsl #4 @ r5 = bits[59..28] of windowed x31smull r6, lr, r11, r4 @ r5..lr = (window_l[3] * (x[21] == x[32]))ldr r12, =WL5 @ r12 = window_l[5]movs r6, r6, lsr #28adc r6, r6, lr, lsl #4 @ r6 = bits[59..28] of windowed x32smull r4, lr, r12, r7 @ r4..lr = (window_l[5] * (x[23] == x[30]))ldr r11, =WL1 @ r11 = window_l[1]ldr r12, =WL2 @ r12 = window_l[2]movs r4, r4, lsr #28adc r4, r4, lr, lsl #4 @ r4 = bits[59..28] of windowed x30smull r7, lr, r12, r3 @ r7..lr = (window_l[2] * (x[20] == x[33]))ldr r12, =WL6 @ r12 = window_l[6]movs r7, r7, lsr #28adc r7, r7, lr, lsl #4 @ r7 = bits[59..28] of windowed x33smull r3, lr, r12, r8 @ r3..lr = (window_l[6] * (x[24] == x[29]))movs r3, r3, lsr #28adc r3, r3, lr, lsl #4 @ r3 = bits[59..28] of windowed x29smull r8, lr, r11, r2 @ r7..lr = (window_l[1] * (x[19] == x[34]))ldr r12, =WL7 @ r12 = window_l[7]ldr r11, =WL8 @ r11 = window_l[8]movs r8, r8, lsr #28adc r8, r8, lr, lsl #4 @ r8 = bits[59..28] of windowed x34smull r2, lr, r12, r9 @ r7..lr = (window_l[7] * (x[25] == x[28]))ldr r12, =WL0 @ r12 = window_l[0]movs r2, r2, lsr #28adc r2, r2, lr, lsl #4 @ r2 = bits[59..28] of windowed x28smull r9, lr, r12, r0 @ r3..lr = (window_l[0] * (x[18] == x[35]))movs r9, r9, lsr #28adc r9, r9, lr, lsl #4 @ r9 = bits[59..28] of windowed x35smull r0, lr, r11, r10 @ r7..lr = (window_l[8] * (x[26] == x[27]))ldr r11, =WL16 @ r11 = window_l[16]ldr r12, =WL17 @ r12 = window_l[17]movs r0, r0, lsr #28adc r0, r0, lr, lsl #4 @ r0 = bits[59..28] of windowed x27stmia r1, { r0, r2 - r9 } @ store windowed x[27] .. x[35]ldmdb r1!, { r0, r2 - r9 } @ load 9 words downto (and including) x18smull r10, lr, r12, r0 @ r10..lr = (window_l[17] * x[18])movs r10, r10, lsr #28adc r0, r10, lr, lsl #4 @ r0 = bits[59..28] of windowed x0smull r10, lr, r11, r2 @ r10..lr = (window_l[16] * x[19])ldr r11, =WL14 @ r11 = window_l[14]ldr r12, =WL15 @ r12 = window_l[15]movs r10, r10, lsr #28adc r2, r10, lr, lsl #4 @ r2 = bits[59..28] of windowed x1smull r10, lr, r12, r3 @ r10..lr = (window_l[15] * x[20])movs r10, r10, lsr #28adc r3, r10, lr, lsl #4 @ r3 = bits[59..28] of windowed x2smull r10, lr, r11, r4 @ r10..lr = (window_l[14] * x[21])ldr r11, =WL12 @ r11 = window_l[12]ldr r12, =WL13 @ r12 = window_l[13]movs r10, r10, lsr #28adc r4, r10, lr, lsl #4 @ r4 = bits[59..28] of windowed x3smull r10, lr, r12, r5 @ r10..lr = (window_l[13] * x[22])movs r10, r10, lsr #28adc r5, r10, lr, lsl #4 @ r5 = bits[59..28] of windowed x4smull r10, lr, r11, r6 @ r10..lr = (window_l[12] * x[23])ldr r11, =WL10 @ r12 = window_l[10]ldr r12, =WL11 @ r12 = window_l[11]movs r10, r10, lsr #28adc r6, r10, lr, lsl #4 @ r6 = bits[59..28] of windowed x5smull r10, lr, r12, r7 @ r10..lr = (window_l[11] * x[24])movs r10, r10, lsr #28adc r7, r10, lr, lsl #4 @ r7 = bits[59..28] of windowed x6smull r10, lr, r11, r8 @ r10..lr = (window_l[10] * x[25])ldr r12, =WL9 @ r12 = window_l[9]movs r10, r10, lsr #28adc r8, r10, lr, lsl #4 @ r8 = bits[59..28] of windowed x7smull r10, lr, r12, r9 @ r10..lr = (window_l[9] * x[26])movs r10, r10, lsr #28adc r9, r10, lr, lsl #4 @ r9 = bits[59..28] of windowed x8stmia r1, { r0, r2 - r9 } @ store windowed x[18] .. x[26]@----@ NB there are 2 possible exits from this function - this is only one of them@----add sp, sp, #(21*4) @ return stack frameldmia sp!, { r4 - r11, pc } @ restore callee saved regs, and return@----stop_block_x0_to_x17:@ r0 = x0@ r1 = &x[9]@ r2 = x1@ r3 = x2@ r4 = x3@ r5 = x4@ r6 = x5@ r7 = x6@ r8 = x7@ r9 = x8@ r10 = -x0@ r11 = window mode: (0 == normal), (1 == start block), (3 == stop block)@ r12 = .@ lr = .rsb r0, r6, #0 @ r0 = -x5rsb r6, r2, #0 @ r6 = -x1rsb r2, r5, #0 @ r2 = -x4rsb r5, r3, #0 @ r5 = -x2rsb r3, r4, #0 @ r3 = -x3add r1, r1, #(3*4) @ r1 = &x[12]stmia r1, { r0, r2, r3, r5, r6, r10 } @ store unchanged x[12] .. x[17]ldr r0, =WL1 @ r0 = window_l[1] == window_s[0]rsb r10, r9, #0 @ r10 = -x8rsb r12, r8, #0 @ r12 = -x7rsb lr, r7, #0 @ lr = -x6@ r0 = WL1@ r1 = &x[12]@ r2 = .@ r3 = .@ r4 = .@ r5 = .@ r6 = .@ r7 = x6@ r8 = x7@ r9 = x8@ r10 = -x8@ r11 = window mode: (0 == normal), (1 == start block), (3 == stop block)@ r12 = -x7@ lr = -x6smull r5, r6, r0, r7 @ r5..r6 = (window_l[1] * x[6])ldr r2, =WL4 @ r2 = window_l[4] == window_s[1]movs r5, r5, lsr #28adc r7, r5, r6, lsl #4 @ r7 = bits[59..28] of windowed x6smull r5, r6, r2, r8 @ r5..r6 = (window_l[4] * x[7])ldr r3, =WL7 @ r3 = window_l[7] == window_s[2]movs r5, r5, lsr #28adc r8, r5, r6, lsl #4 @ r8 = bits[59..28] of windowed x7smull r5, r6, r3, r9 @ r5..r6 = (window_l[7] * x[8])ldr r4, =WL10 @ r4 = window_l[10] == window_s[3]movs r5, r5, lsr #28adc r9, r5, r6, lsl #4 @ r9 = bits[59..28] of windowed x8smull r5, r6, r4, r10 @ r5..r6 = (window_l[10] * (x[9] == -x[8]))ldr r0, =WL13 @ r0 = window_l[13] == window_s[4]movs r5, r5, lsr #28adc r10, r5, r6, lsl #4 @ r10 = bits[59..28] of windowed x9smull r5, r6, r0, r12 @ r5..r6 = (window_l[13] * (x[10] == -x[7]))ldr r2, =WL16 @ r2 = window_l[16] == window_s[5]movs r5, r5, lsr #28adc r12, r5, r6, lsl #4 @ r10 = bits[59..28] of windowed x9smull r5, r6, r2, lr @ r5..r6 = (window_l[16] * (x[11] == -x[6]))ldr r0, =0x00movs r5, r5, lsr #28adc lr, r5, r6, lsl #4 @ r10 = bits[59..28] of windowed x9stmdb r1!, { r7 - r10, r12, lr } @ store windowed x[6] .. x[11]ldr r5, =0x00ldr r6, =0x00ldr r2, =0x00ldr r3, =0x00ldr r4, =0x00stmdb r1!, { r0, r2 - r6 } @ store windowed x[0] .. x[5]b normal_block_x18_to_x35@----start_block_x18_to_x35:ldr r4, =WL1 @ r0 = window_l[1] == window_s[0]add r1, r1, #(24*4) @ r1 = &x[24]ldmia r1, { r0, r2, r3 } @ load 3 words from x24, dont update pointer@ r0 = x24@ r1 = &x[24]@ r2 = x25@ r3 = x26@ r4 = WL1@ r5 = WL4@ r6 = WL7@ r7 = WL10@ r8 = WL13@ r9 = WL16@ r10 = .@ r11 = .@ r12 = .@ lr = .ldr r5, =WL4 @ r5 = window_l[4] == window_s[1]smull r10, r11, r4, r0 @ r10..r11 = (window_l[1] * (x[24] == x[29]))ldr r6, =WL7 @ r6 = window_l[7] == window_s[2]movs r10, r10, lsr #28adc lr, r10, r11, lsl #4 @ lr = bits[59..28] of windowed x29smull r10, r11, r5, r2 @ r10..r11 = (window_l[4] * (x[25] == x[28]))ldr r7, =WL10 @ r7 = window_l[10] == window_s[3]movs r10, r10, lsr #28adc r12, r10, r11, lsl #4 @ r12 = bits[59..28] of windowed x28smull r10, r11, r6, r3 @ r10..r11 = (window_l[7] * (x[26] == x[27]))ldr r8, =WL13 @ r8 = window_l[13] == window_s[4]movs r10, r10, lsr #28adc r4, r10, r11, lsl #4 @ r4 = bits[59..28] of windowed x27smull r10, r11, r7, r3 @ r10..r11 = (window_l[10] * x[26])ldr r9, =WL16 @ r9 = window_l[16] == window_s[5]movs r10, r10, lsr #28adc r3, r10, r11, lsl #4 @ r3 = bits[59..28] of windowed x26smull r10, r11, r8, r2 @ r10..r11 = (window_l[13] * x[25])ldr r5, =0x00movs r10, r10, lsr #28adc r2, r10, r11, lsl #4 @ r2 = bits[59..28] of windowed x25smull r10, r11, r9, r0 @ r10..r11 = (window_l[16] * x[24])ldr r6, =0x00movs r10, r10, lsr #28adc r0, r10, r11, lsl #4 @ r0 = bits[59..28] of windowed x24stmia r1!, { r0, r2, r3, r4, r12, lr } @ store windowed x[24] .. x[29]ldr r7, =0x00ldr r8, =0x00ldr r9, =0x00ldr r10, =0x00stmia r1!, { r5 - r10 } @ store windowed x[30] .. x[35]@----@ NB there are 2 possible exits from this function - this is only one of them@----add sp, sp, #(21*4) @ return stack frameldmia sp!, { r4 - r11, pc } @ restore callee saved regs, and return@----@END@----