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Diffstat (limited to 'src/libmad/imdct_l_arm.S')
| -rw-r--r-- | src/libmad/imdct_l_arm.S | 1000 |
1 files changed, 0 insertions, 1000 deletions
diff --git a/src/libmad/imdct_l_arm.S b/src/libmad/imdct_l_arm.S index badec5bcb..e69de29bb 100644 --- a/src/libmad/imdct_l_arm.S +++ b/src/libmad/imdct_l_arm.S @@ -1,1000 +0,0 @@ -/***************************************************************************** -* 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 1.7 2001/03/25 20:03:34 rob Rel $ -* -* 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 array - r1 = pointer to 36 element output array - r2 = windowing block type - - - Stack frame created during execution of the function: - - Initial Holds: - Stack - pointer - minus: - - 0 - 4 lr - 8 r11 - 12 r10 - 16 r9 - 20 r8 - 24 r7 - 28 r6 - 32 r5 - 36 r4 - - 40 r2 : windowing block type - - 44 ct00 high - 48 ct00 low - 52 ct01 high - 56 ct01 low - 60 ct04 high - 64 ct04 low - 68 ct06 high - 72 ct06 low - 76 ct05 high - 80 ct05 low - 84 ct03 high - 88 ct03 low - 92 -ct05 high - 96 -ct05 low - 100 -ct07 high - 104 -ct07 low - 108 ct07 high - 112 ct07 low - 116 ct02 high - 120 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_l - -III_imdct_l: -_III_imdct_l: - - stmdb sp!, { r2, r4 - r11, lr } @ all callee saved regs, plus arg3 - - ldr r4, =K08 @ r4 = K08 - ldr r5, =K09 @ r5 = K09 - ldr r8, [r0, #X4] @ r8 = X4 - ldr r9, [r0, #X13] @ r9 = X13 - rsb r6, r4, #0 @ r6 = -K08 - rsb r7, r5, #0 @ r7 = -K09 - - smull r2, r3, r4, r8 @ r2..r3 = (X4 * K08) - smlal r2, r3, r5, r9 @ r2..r3 = (X4 * K08) + (X13 * K09) = ct01 - - smull r10, lr, r8, r5 @ r10..lr = (X4 * K09) - smlal r10, lr, r9, r6 @ r10..lr = (X4 * K09) + (X13 * -K08) = ct00 - - ldr r8, [r0, #X7] @ r8 = X7 - ldr r9, [r0, #X16] @ r9 = X16 - - stmdb sp!, { r2, r3, r10, lr } @ stack ct00_h, ct00_l, ct01_h, ct01_l - - add r8, r8, r9 @ r8 = (X7 + X16) - ldr r9, [r0, #X1] @ r9 = X1 - - smlal r2, r3, r6, r8 @ r2..r3 = ct01 + ((X7 + X16) * -K08) - smlal r2, r3, r7, r9 @ r2..r3 += (X1 * -K09) - - ldr r7, [r0, #X10] @ r7 = X10 - - rsbs r10, r10, #0 - rsc lr, lr, #0 @ r10..lr = -ct00 - - smlal r2, r3, r5, r7 @ r2..r3 += (X10 * K09) = ct06 - - smlal 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) = ct04 - - stmdb 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, r8 - sub r7, r7, r9 @ r7 = (X0 - X11 -X12) = ct14 - - ldr r9, [r0, #X3] - ldr r8, [r0, #X8] - ldr r11, [r0, #X15] - sub r8, r8, r9 - add r8, r8, r11 @ r8 = (X8 - X3 + X15) = ct16 - - add r11, r7, r8 @ r11 = ct14 + ct16 = ct18 - - smlal 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, r9 - sub r6, r6, r12 @ r6 = (X2 - X9 - X14) = ct15 - - ldr r9, [r0, #X5] - ldr r12, [r0, #X6] - sub r9, r9, r12 - ldr r12, [r0, #X17] - sub r9, r9, r12 @ r9 = (X5 - X6 - X17) = ct17 - - add r12, r9, r6 @ r12 = ct15 + ct17 = ct19 - - smlal 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 #28 - adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3 - str r2, [r1, #x22] @ store result x22 - - movs r10, r10, lsr #28 - adc r10, r10, lr, lsl #4 @ r10 = bits[59..28] of r10..lr - str 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 = K03 - ldr lr, =K15 @ lr = K15 - - smlal r2, r3, r10, r7 @ r2..r3 = ct06 + (ct14 * K03) - smlal r4, r5, lr, r7 @ r4..r5 = ct04 + (ct14 * K15) - - ldr r12, =K14 @ r12 = K14 - rsb r10, r10, #0 @ r10 = -K03 - - smlal 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 = -K02 - rsb r12, r12, #0 @ r12 = -K14 - - smlal 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 #28 - adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3 - str r2, [r1, #x7] @ store result x7 - - movs r4, r4, lsr #28 - adc r4, r4, r5, lsl #4 @ r4 = bits[59..28] of r4..r5 - str 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 = K15 - - rsbs r2, r2, #0 - rsc r3, r3, #0 @ r2..r3 = -ct06 - - smlal 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 = -K15 - rsb r11, r11, #0 @ r11 = K02 - - smlal r2, r3, lr, r9 @ r2..r3 += (ct17 * -K15) - smlal r2, r3, r11, r6 @ r2..r3 += (ct15 * K02) - - movs r4, r4, lsr #28 - adc r4, r4, r5, lsl #4 @ r4 = bits[59..28] of r4..r5 - str r4, [r1, #x25] @ store result x25 - - movs r2, r2, lsr #28 - adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3 - str r2, [r1, #x19] @ store result x19 - - @---- - - ldr r2, [sp, #16] @ r2 = ct01_l - ldr r3, [sp, #20] @ r3 = ct01_h - - ldr r6, [r0, #X1] - ldr r8, [r0, #X7] - ldr r9, [r0, #X10] - ldr r7, [r0, #X16] - - rsbs r2, r2, #0 - rsc r3, r3, #0 @ r2..r3 = -ct01 - - mov r4, r2 - mov 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 = -K15 - - smlal 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 = K15 - rsb r11, r11, #0 @ r11 = -K02 - - smlal r4, r5, lr, r6 @ r4..r5 += (X1 * K15) = ct05 - smlal r2, r3, r11, r6 @ r2..r3 += (X1 * -K02) = ct03 - - stmdb sp!, { r2, r3, r4, r5 } @ stack ct05_h, ct05_l, ct03_h, ct03_l - - rsbs r4, r4, #0 - rsc r5, r5, #0 @ r4..r5 = -ct05 - - stmdb sp!, { r4, r5 } @ stack -ct05_h, -ct05_l - - ldr r2, [sp, #48] @ r2 = ct00_l - ldr r3, [sp, #52] @ r3 = ct00_h - - rsb r10, r10, #0 @ r10 = K03 - - rsbs r4, r2, #0 - rsc 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 = K15 - - smlal 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) = ct07 - - rsb lr, lr, #0 @ lr = -K15 - rsb r11, r11, #0 @ r11 = K02 - - smlal r2, r3, r11, r8 @ r2..r3 += (X7 * K02) - smlal r2, r3, lr, r7 @ r2..r3 += (X16 * -K15) = ct02 - - rsbs r6, r4, #0 - rsc r7, r5, #0 @ r6..r7 = -ct07 - - stmdb 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 element - - smull 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 element - - ldr 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 ctxx - - ldmia r5, { r6, r7 } @ r6..r7 = ctxx - - mov r8, r10, lsl #16 @ push ctxx index off the top end - - adds r3, r3, r6 @ add low words - adc r4, r4, r7 @ add high words, with carry - movs r3, r3, lsr #28 - adc r3, r3, r4, lsl #4 @ r3 = bits[59..28] of r3..r4 - - str r3, [r1, r8, lsr #24] @ push completion flag off the bottom end - - movs r8, r8, lsl #8 @ push result location index off the top end - beq loop @ loop back if completion flag not set - b imdct_l_windowing @ branch to windowing stage if looping finished - -imdct36_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 stack - ldmia 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 flags - rsb 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 = -x8 - rsb r9, r2, #0 @ r9 = -x1 - rsb r2, r8, #0 @ r2 = -x7 - rsb r8, r3, #0 @ r8 = -x2 - rsb r3, r7, #0 @ r3 = -x6 - rsb r7, r4, #0 @ r7 = -x3 - rsb r4, r6, #0 @ r4 = -x5 - rsb 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 #28 - adc r0, r5, lr, lsl #4 @ r0 = bits[59..28] of windowed x9 - - smull r5, lr, r12, r2 @ r5..lr = (window_l[10] * (x[10] == -x[7])) - ldr r12, =WL11 @ r12 = window_l[11] - movs r5, r5, lsr #28 - adc r2, r5, lr, lsl #4 @ r2 = bits[59..28] of windowed x10 - - smull r5, lr, r12, r3 @ r5..lr = (window_l[11] * (x[11] == -x[6])) - ldr r12, =WL12 @ r12 = window_l[12] - movs r5, r5, lsr #28 - adc r3, r5, lr, lsl #4 @ r3 = bits[59..28] of windowed x11 - - smull r5, lr, r12, r4 @ r5..lr = (window_l[12] * (x[12] == -x[5])) - ldr r12, =WL13 @ r12 = window_l[13] - movs r5, r5, lsr #28 - adc r4, r5, lr, lsl #4 @ r4 = bits[59..28] of windowed x12 - - smull r5, lr, r12, r6 @ r5..lr = (window_l[13] * (x[13] == -x[4])) - ldr r12, =WL14 @ r12 = window_l[14] - movs r5, r5, lsr #28 - adc r6, r5, lr, lsl #4 @ r6 = bits[59..28] of windowed x13 - - smull r5, lr, r12, r7 @ r5..lr = (window_l[14] * (x[14] == -x[3])) - ldr r12, =WL15 @ r12 = window_l[15] - movs r5, r5, lsr #28 - adc r7, r5, lr, lsl #4 @ r7 = bits[59..28] of windowed x14 - - smull r5, lr, r12, r8 @ r5..lr = (window_l[15] * (x[15] == -x[2])) - ldr r12, =WL16 @ r12 = window_l[16] - movs r5, r5, lsr #28 - adc r8, r5, lr, lsl #4 @ r8 = bits[59..28] of windowed x15 - - smull r5, lr, r12, r9 @ r5..lr = (window_l[16] * (x[16] == -x[1])) - ldr r12, =WL17 @ r12 = window_l[17] - movs r5, r5, lsr #28 - adc r9, r5, lr, lsl #4 @ r9 = bits[59..28] of windowed x16 - - smull r5, lr, r12, r10 @ r5..lr = (window_l[17] * (x[17] == -x[0])) - ldr r12, =WL0 @ r12 = window_l[0] - movs r5, r5, lsr #28 - adc r10, r5, lr, lsl #4 @ r10 = bits[59..28] of windowed x17 - - - stmia r1, { r0, r2 - r4, r6 - r10 } @ store windowed x[9] .. x[17] - ldmdb r1!, { r0, r2 - r9 } @ load 9 words downto (and including) x0 - - - smull r10, lr, r12, r0 @ r10..lr = (window_l[0] * x[0]) - ldr r12, =WL1 @ r12 = window_l[1] - movs r10, r10, lsr #28 - adc r0, r10, lr, lsl #4 @ r0 = bits[59..28] of windowed x0 - - smull r10, lr, r12, r2 @ r10..lr = (window_l[1] * x[1]) - ldr r12, =WL2 @ r12 = window_l[2] - movs r10, r10, lsr #28 - adc r2, r10, lr, lsl #4 @ r2 = bits[59..28] of windowed x1 - - smull r10, lr, r12, r3 @ r10..lr = (window_l[2] * x[2]) - ldr r12, =WL3 @ r12 = window_l[3] - movs r10, r10, lsr #28 - adc r3, r10, lr, lsl #4 @ r3 = bits[59..28] of windowed x2 - - smull r10, lr, r12, r4 @ r10..lr = (window_l[3] * x[3]) - ldr r12, =WL4 @ r12 = window_l[4] - movs r10, r10, lsr #28 - adc r4, r10, lr, lsl #4 @ r4 = bits[59..28] of windowed x3 - - smull r10, lr, r12, r5 @ r10..lr = (window_l[4] * x[4]) - ldr r12, =WL5 @ r12 = window_l[5] - movs r10, r10, lsr #28 - adc r5, r10, lr, lsl #4 @ r5 = bits[59..28] of windowed x4 - - smull r10, lr, r12, r6 @ r10..lr = (window_l[5] * x[5]) - ldr r12, =WL6 @ r12 = window_l[6] - movs r10, r10, lsr #28 - adc r6, r10, lr, lsl #4 @ r6 = bits[59..28] of windowed x5 - - smull r10, lr, r12, r7 @ r10..lr = (window_l[6] * x[6]) - ldr r12, =WL7 @ r12 = window_l[7] - movs r10, r10, lsr #28 - adc r7, r10, lr, lsl #4 @ r7 = bits[59..28] of windowed x6 - - smull r10, lr, r12, r8 @ r10..lr = (window_l[7] * x[7]) - ldr r12, =WL8 @ r12 = window_l[8] - movs r10, r10, lsr #28 - adc r8, r10, lr, lsl #4 @ r8 = bits[59..28] of windowed x7 - - smull r10, lr, r12, r9 @ r10..lr = (window_l[8] * x[8]) - movs r10, r10, lsr #28 - adc r9, r10, lr, lsl #4 @ r9 = bits[59..28] of windowed x8 - - stmia r1, { r0, r2 - r9 } @ store windowed x[0] .. x[8] - - cmp r11, #BLOCK_MODE_START - beq 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 #28 - adc r5, r5, lr, lsl #4 @ r5 = bits[59..28] of windowed x31 - - smull r6, lr, r11, r4 @ r5..lr = (window_l[3] * (x[21] == x[32])) - ldr r12, =WL5 @ r12 = window_l[5] - movs r6, r6, lsr #28 - adc r6, r6, lr, lsl #4 @ r6 = bits[59..28] of windowed x32 - - smull 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 #28 - adc r4, r4, lr, lsl #4 @ r4 = bits[59..28] of windowed x30 - - smull r7, lr, r12, r3 @ r7..lr = (window_l[2] * (x[20] == x[33])) - ldr r12, =WL6 @ r12 = window_l[6] - movs r7, r7, lsr #28 - adc r7, r7, lr, lsl #4 @ r7 = bits[59..28] of windowed x33 - - smull r3, lr, r12, r8 @ r3..lr = (window_l[6] * (x[24] == x[29])) - movs r3, r3, lsr #28 - adc r3, r3, lr, lsl #4 @ r3 = bits[59..28] of windowed x29 - - smull 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 #28 - adc r8, r8, lr, lsl #4 @ r8 = bits[59..28] of windowed x34 - - smull r2, lr, r12, r9 @ r7..lr = (window_l[7] * (x[25] == x[28])) - ldr r12, =WL0 @ r12 = window_l[0] - movs r2, r2, lsr #28 - adc r2, r2, lr, lsl #4 @ r2 = bits[59..28] of windowed x28 - - smull r9, lr, r12, r0 @ r3..lr = (window_l[0] * (x[18] == x[35])) - movs r9, r9, lsr #28 - adc r9, r9, lr, lsl #4 @ r9 = bits[59..28] of windowed x35 - - smull 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 #28 - adc r0, r0, lr, lsl #4 @ r0 = bits[59..28] of windowed x27 - - - stmia r1, { r0, r2 - r9 } @ store windowed x[27] .. x[35] - ldmdb r1!, { r0, r2 - r9 } @ load 9 words downto (and including) x18 - - - smull r10, lr, r12, r0 @ r10..lr = (window_l[17] * x[18]) - movs r10, r10, lsr #28 - adc r0, r10, lr, lsl #4 @ r0 = bits[59..28] of windowed x0 - - smull 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 #28 - adc r2, r10, lr, lsl #4 @ r2 = bits[59..28] of windowed x1 - - smull r10, lr, r12, r3 @ r10..lr = (window_l[15] * x[20]) - movs r10, r10, lsr #28 - adc r3, r10, lr, lsl #4 @ r3 = bits[59..28] of windowed x2 - - smull 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 #28 - adc r4, r10, lr, lsl #4 @ r4 = bits[59..28] of windowed x3 - - smull r10, lr, r12, r5 @ r10..lr = (window_l[13] * x[22]) - movs r10, r10, lsr #28 - adc r5, r10, lr, lsl #4 @ r5 = bits[59..28] of windowed x4 - - smull 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 #28 - adc r6, r10, lr, lsl #4 @ r6 = bits[59..28] of windowed x5 - - smull r10, lr, r12, r7 @ r10..lr = (window_l[11] * x[24]) - movs r10, r10, lsr #28 - adc r7, r10, lr, lsl #4 @ r7 = bits[59..28] of windowed x6 - - smull r10, lr, r11, r8 @ r10..lr = (window_l[10] * x[25]) - ldr r12, =WL9 @ r12 = window_l[9] - movs r10, r10, lsr #28 - adc r8, r10, lr, lsl #4 @ r8 = bits[59..28] of windowed x7 - - smull r10, lr, r12, r9 @ r10..lr = (window_l[9] * x[26]) - - movs r10, r10, lsr #28 - adc r9, r10, lr, lsl #4 @ r9 = bits[59..28] of windowed x8 - - stmia 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 frame - ldmia 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 = -x5 - rsb r6, r2, #0 @ r6 = -x1 - rsb r2, r5, #0 @ r2 = -x4 - rsb r5, r3, #0 @ r5 = -x2 - rsb r3, r4, #0 @ r3 = -x3 - - add 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 = -x8 - rsb r12, r8, #0 @ r12 = -x7 - rsb 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 = -x6 - - smull 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 #28 - adc r7, r5, r6, lsl #4 @ r7 = bits[59..28] of windowed x6 - - smull 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 #28 - adc r8, r5, r6, lsl #4 @ r8 = bits[59..28] of windowed x7 - - smull 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 #28 - adc r9, r5, r6, lsl #4 @ r9 = bits[59..28] of windowed x8 - - smull 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 #28 - adc r10, r5, r6, lsl #4 @ r10 = bits[59..28] of windowed x9 - - smull 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 #28 - adc r12, r5, r6, lsl #4 @ r10 = bits[59..28] of windowed x9 - - smull r5, r6, r2, lr @ r5..r6 = (window_l[16] * (x[11] == -x[6])) - - ldr r0, =0x00 - - movs r5, r5, lsr #28 - adc lr, r5, r6, lsl #4 @ r10 = bits[59..28] of windowed x9 - - stmdb r1!, { r7 - r10, r12, lr } @ store windowed x[6] .. x[11] - - ldr r5, =0x00 - ldr r6, =0x00 - ldr r2, =0x00 - ldr r3, =0x00 - ldr r4, =0x00 - - stmdb 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 #28 - adc lr, r10, r11, lsl #4 @ lr = bits[59..28] of windowed x29 - - smull 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 #28 - adc r12, r10, r11, lsl #4 @ r12 = bits[59..28] of windowed x28 - - smull 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 #28 - adc r4, r10, r11, lsl #4 @ r4 = bits[59..28] of windowed x27 - - smull 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 #28 - adc r3, r10, r11, lsl #4 @ r3 = bits[59..28] of windowed x26 - - smull r10, r11, r8, r2 @ r10..r11 = (window_l[13] * x[25]) - ldr r5, =0x00 - movs r10, r10, lsr #28 - adc r2, r10, r11, lsl #4 @ r2 = bits[59..28] of windowed x25 - - smull r10, r11, r9, r0 @ r10..r11 = (window_l[16] * x[24]) - ldr r6, =0x00 - movs r10, r10, lsr #28 - adc r0, r10, r11, lsl #4 @ r0 = bits[59..28] of windowed x24 - - stmia r1!, { r0, r2, r3, r4, r12, lr } @ store windowed x[24] .. x[29] - - ldr r7, =0x00 - ldr r8, =0x00 - ldr r9, =0x00 - ldr r10, =0x00 - - stmia 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 frame - ldmia sp!, { r4 - r11, pc } @ restore callee saved regs, and return - - @---- - @END - @---- - |