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1000 lines
34 KiB
1000 lines
34 KiB
/*****************************************************************************
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* Copyright (C) 2000-2001 Andre McCurdy <[email protected]>
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*
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* This program is free software. you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation@ either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY, without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program@ if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*****************************************************************************
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*
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* Notes:
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*
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*
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*****************************************************************************
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*
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* $Id: imdct_l_arm.S,v 1.7 2001/03/25 20:03:34 rob Rel $
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*
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* 2001/03/24: Andre McCurdy <[email protected]>
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* - Corrected PIC unsafe loading of address of 'imdct36_long_karray'
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*
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* 2000/09/20: Robert Leslie <[email protected]>
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* - Added a global symbol with leading underscore per suggestion of
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* Simon Burge to support linking with the a.out format.
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*
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* 2000/09/15: Robert Leslie <[email protected]>
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* - Fixed a small bug where flags were changed before a conditional branch.
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*
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* 2000/09/15: Andre McCurdy <[email protected]>
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* - Applied Nicolas Pitre's rounding optimisation in all remaining places.
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*
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* 2000/09/09: Nicolas Pitre <[email protected]>
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* - Optimized rounding + scaling operations.
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*
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* 2000/08/09: Andre McCurdy <[email protected]>
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* - Original created.
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*
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****************************************************************************/
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/*
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On entry:
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r0 = pointer to 18 element input array
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r1 = pointer to 36 element output array
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r2 = windowing block type
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Stack frame created during execution of the function:
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Initial Holds:
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Stack
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pointer
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minus:
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0
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4 lr
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8 r11
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12 r10
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16 r9
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20 r8
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24 r7
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28 r6
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32 r5
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36 r4
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40 r2 : windowing block type
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44 ct00 high
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48 ct00 low
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52 ct01 high
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56 ct01 low
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60 ct04 high
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64 ct04 low
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68 ct06 high
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72 ct06 low
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76 ct05 high
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80 ct05 low
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84 ct03 high
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88 ct03 low
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92 -ct05 high
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96 -ct05 low
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100 -ct07 high
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104 -ct07 low
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108 ct07 high
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112 ct07 low
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116 ct02 high
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120 ct02 low
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*/
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#define BLOCK_MODE_NORMAL 0
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#define BLOCK_MODE_START 1
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#define BLOCK_MODE_STOP 3
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#define X0 0x00
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#define X1 0x04
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#define X2 0x08
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#define X3 0x0C
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#define X4 0x10
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#define X5 0x14
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#define X6 0x18
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#define X7 0x1c
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#define X8 0x20
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#define X9 0x24
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#define X10 0x28
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#define X11 0x2c
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#define X12 0x30
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#define X13 0x34
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#define X14 0x38
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#define X15 0x3c
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#define X16 0x40
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#define X17 0x44
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#define x0 0x00
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#define x1 0x04
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#define x2 0x08
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#define x3 0x0C
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#define x4 0x10
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#define x5 0x14
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#define x6 0x18
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#define x7 0x1c
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#define x8 0x20
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#define x9 0x24
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#define x10 0x28
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#define x11 0x2c
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#define x12 0x30
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#define x13 0x34
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#define x14 0x38
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#define x15 0x3c
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#define x16 0x40
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#define x17 0x44
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#define x18 0x48
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#define x19 0x4c
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#define x20 0x50
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#define x21 0x54
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#define x22 0x58
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#define x23 0x5c
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#define x24 0x60
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#define x25 0x64
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#define x26 0x68
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#define x27 0x6c
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#define x28 0x70
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#define x29 0x74
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#define x30 0x78
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#define x31 0x7c
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#define x32 0x80
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#define x33 0x84
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#define x34 0x88
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#define x35 0x8c
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#define K00 0x0ffc19fd
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#define K01 0x00b2aa3e
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#define K02 0x0fdcf549
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#define K03 0x0216a2a2
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#define K04 0x0f9ee890
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#define K05 0x03768962
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#define K06 0x0f426cb5
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#define K07 0x04cfb0e2
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#define K08 0x0ec835e8
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#define K09 0x061f78aa
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#define K10 0x0e313245
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#define K11 0x07635284
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#define K12 0x0d7e8807
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#define K13 0x0898c779
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#define K14 0x0cb19346
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#define K15 0x09bd7ca0
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#define K16 0x0bcbe352
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#define K17 0x0acf37ad
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#define minus_K02 0xf0230ab7
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#define WL0 0x00b2aa3e
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#define WL1 0x0216a2a2
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#define WL2 0x03768962
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#define WL3 0x04cfb0e2
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#define WL4 0x061f78aa
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#define WL5 0x07635284
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#define WL6 0x0898c779
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#define WL7 0x09bd7ca0
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#define WL8 0x0acf37ad
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#define WL9 0x0bcbe352
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#define WL10 0x0cb19346
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#define WL11 0x0d7e8807
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#define WL12 0x0e313245
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#define WL13 0x0ec835e8
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#define WL14 0x0f426cb5
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#define WL15 0x0f9ee890
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#define WL16 0x0fdcf549
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#define WL17 0x0ffc19fd
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@*****************************************************************************
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.text
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.align
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.global III_imdct_l
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.global _III_imdct_l
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III_imdct_l:
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_III_imdct_l:
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stmdb sp!, { r2, r4 - r11, lr } @ all callee saved regs, plus arg3
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ldr r4, =K08 @ r4 = K08
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ldr r5, =K09 @ r5 = K09
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ldr r8, [r0, #X4] @ r8 = X4
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ldr r9, [r0, #X13] @ r9 = X13
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rsb r6, r4, #0 @ r6 = -K08
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rsb r7, r5, #0 @ r7 = -K09
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smull r2, r3, r4, r8 @ r2..r3 = (X4 * K08)
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smlal r2, r3, r5, r9 @ r2..r3 = (X4 * K08) + (X13 * K09) = ct01
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smull r10, lr, r8, r5 @ r10..lr = (X4 * K09)
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smlal r10, lr, r9, r6 @ r10..lr = (X4 * K09) + (X13 * -K08) = ct00
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ldr r8, [r0, #X7] @ r8 = X7
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ldr r9, [r0, #X16] @ r9 = X16
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stmdb sp!, { r2, r3, r10, lr } @ stack ct00_h, ct00_l, ct01_h, ct01_l
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add r8, r8, r9 @ r8 = (X7 + X16)
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ldr r9, [r0, #X1] @ r9 = X1
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smlal r2, r3, r6, r8 @ r2..r3 = ct01 + ((X7 + X16) * -K08)
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smlal r2, r3, r7, r9 @ r2..r3 += (X1 * -K09)
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ldr r7, [r0, #X10] @ r7 = X10
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rsbs r10, r10, #0
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rsc lr, lr, #0 @ r10..lr = -ct00
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smlal r2, r3, r5, r7 @ r2..r3 += (X10 * K09) = ct06
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smlal r10, lr, r9, r6 @ r10..lr = -ct00 + ( X1 * -K08)
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smlal r10, lr, r8, r5 @ r10..lr += ((X7 + X16) * K09)
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smlal r10, lr, r7, r4 @ r10..lr += ( X10 * K08) = ct04
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stmdb sp!, { r2, r3, r10, lr } @ stack ct04_h, ct04_l, ct06_h, ct06_l
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@----
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ldr r7, [r0, #X0]
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ldr r8, [r0, #X11]
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ldr r9, [r0, #X12]
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sub r7, r7, r8
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sub r7, r7, r9 @ r7 = (X0 - X11 -X12) = ct14
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ldr r9, [r0, #X3]
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ldr r8, [r0, #X8]
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ldr r11, [r0, #X15]
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sub r8, r8, r9
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add r8, r8, r11 @ r8 = (X8 - X3 + X15) = ct16
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add r11, r7, r8 @ r11 = ct14 + ct16 = ct18
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smlal r2, r3, r6, r11 @ r2..r3 = ct06 + ((X0 - X11 - X3 + X15 + X8 - X12) * -K08)
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ldr r6, [r0, #X2]
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ldr r9, [r0, #X9]
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ldr r12, [r0, #X14]
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sub r6, r6, r9
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sub r6, r6, r12 @ r6 = (X2 - X9 - X14) = ct15
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ldr r9, [r0, #X5]
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ldr r12, [r0, #X6]
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sub r9, r9, r12
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ldr r12, [r0, #X17]
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sub r9, r9, r12 @ r9 = (X5 - X6 - X17) = ct17
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add r12, r9, r6 @ r12 = ct15 + ct17 = ct19
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smlal r2, r3, r5, r12 @ r2..r3 += ((X2 - X9 + X5 - X6 - X17 - X14) * K09)
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smlal r10, lr, r11, r5 @ r10..lr = ct04 + (ct18 * K09)
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smlal r10, lr, r12, r4 @ r10..lr = ct04 + (ct18 * K09) + (ct19 * K08)
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movs r2, r2, lsr #28
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adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3
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str r2, [r1, #x22] @ store result x22
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movs r10, r10, lsr #28
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adc r10, r10, lr, lsl #4 @ r10 = bits[59..28] of r10..lr
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str r10, [r1, #x4] @ store result x4
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@----
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ldmia sp, { r2, r3, r4, r5 } @ r2..r3 = ct06, r4..r5 = ct04 (dont update sp)
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@ r2..r3 = ct06
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@ r4..r5 = ct04
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@ r6 = ct15
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@ r7 = ct14
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@ r8 = ct16
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@ r9 = ct17
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@ r10 = .
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@ r11 = .
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@ r12 = .
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@ lr = .
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ldr r10, =K03 @ r10 = K03
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ldr lr, =K15 @ lr = K15
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smlal r2, r3, r10, r7 @ r2..r3 = ct06 + (ct14 * K03)
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smlal r4, r5, lr, r7 @ r4..r5 = ct04 + (ct14 * K15)
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ldr r12, =K14 @ r12 = K14
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rsb r10, r10, #0 @ r10 = -K03
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smlal r2, r3, lr, r6 @ r2..r3 += (ct15 * K15)
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smlal r4, r5, r10, r6 @ r4..r5 += (ct15 * -K03)
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smlal r2, r3, r12, r8 @ r2..r3 += (ct16 * K14)
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ldr r11, =minus_K02 @ r11 = -K02
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rsb r12, r12, #0 @ r12 = -K14
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smlal r4, r5, r12, r9 @ r4..r5 += (ct17 * -K14)
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smlal r2, r3, r11, r9 @ r2..r3 += (ct17 * -K02)
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smlal r4, r5, r11, r8 @ r4..r5 += (ct16 * -K02)
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movs r2, r2, lsr #28
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adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3
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str r2, [r1, #x7] @ store result x7
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movs r4, r4, lsr #28
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adc r4, r4, r5, lsl #4 @ r4 = bits[59..28] of r4..r5
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str r4, [r1, #x1] @ store result x1
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@----
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ldmia sp, { r2, r3, r4, r5 } @ r2..r3 = ct06, r4..r5 = ct04 (dont update sp)
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@ r2..r3 = ct06
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@ r4..r5 = ct04
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@ r6 = ct15
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@ r7 = ct14
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@ r8 = ct16
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@ r9 = ct17
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@ r10 = -K03
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@ r11 = -K02
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@ r12 = -K14
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@ lr = K15
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rsbs r2, r2, #0
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rsc r3, r3, #0 @ r2..r3 = -ct06
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smlal r2, r3, r12, r7 @ r2..r3 = -ct06 + (ct14 * -K14)
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smlal r2, r3, r10, r8 @ r2..r3 += (ct16 * -K03)
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smlal r4, r5, r12, r6 @ r4..r5 = ct04 + (ct15 * -K14)
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smlal r4, r5, r10, r9 @ r4..r5 += (ct17 * -K03)
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smlal r4, r5, lr, r8 @ r4..r5 += (ct16 * K15)
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smlal r4, r5, r11, r7 @ r4..r5 += (ct14 * -K02)
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rsb lr, lr, #0 @ lr = -K15
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rsb r11, r11, #0 @ r11 = K02
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smlal r2, r3, lr, r9 @ r2..r3 += (ct17 * -K15)
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smlal r2, r3, r11, r6 @ r2..r3 += (ct15 * K02)
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movs r4, r4, lsr #28
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adc r4, r4, r5, lsl #4 @ r4 = bits[59..28] of r4..r5
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str r4, [r1, #x25] @ store result x25
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movs r2, r2, lsr #28
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adc r2, r2, r3, lsl #4 @ r2 = bits[59..28] of r2..r3
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str r2, [r1, #x19] @ store result x19
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@----
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ldr r2, [sp, #16] @ r2 = ct01_l
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ldr r3, [sp, #20] @ r3 = ct01_h
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ldr r6, [r0, #X1]
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ldr r8, [r0, #X7]
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ldr r9, [r0, #X10]
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ldr r7, [r0, #X16]
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rsbs r2, r2, #0
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rsc r3, r3, #0 @ r2..r3 = -ct01
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mov r4, r2
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mov r5, r3 @ r4..r5 = -ct01
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@ r2..r3 = -ct01
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@ r4..r5 = -ct01
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@ r6 = X1
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@ r7 = X16
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@ r8 = X7
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@ r9 = X10
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@ r10 = -K03
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@ r11 = K02
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@ r12 = -K14
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@ lr = -K15
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smlal r4, r5, r12, r7 @ r4..r5 = -ct01 + (X16 * -K14)
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smlal r2, r3, lr, r9 @ r2..r3 = -ct01 + (X10 * -K15)
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smlal r4, r5, r10, r8 @ r4..r5 += (X7 * -K03)
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smlal r2, r3, r10, r7 @ r2..r3 += (X16 * -K03)
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smlal r4, r5, r11, r9 @ r4..r5 += (X10 * K02)
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smlal r2, r3, r12, r8 @ r2..r3 += (X7 * -K14)
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rsb lr, lr, #0 @ lr = K15
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rsb r11, r11, #0 @ r11 = -K02
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smlal r4, r5, lr, r6 @ r4..r5 += (X1 * K15) = ct05
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smlal r2, r3, r11, r6 @ r2..r3 += (X1 * -K02) = ct03
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stmdb sp!, { r2, r3, r4, r5 } @ stack ct05_h, ct05_l, ct03_h, ct03_l
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rsbs r4, r4, #0
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rsc r5, r5, #0 @ r4..r5 = -ct05
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stmdb sp!, { r4, r5 } @ stack -ct05_h, -ct05_l
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ldr r2, [sp, #48] @ r2 = ct00_l
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ldr r3, [sp, #52] @ r3 = ct00_h
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rsb r10, r10, #0 @ r10 = K03
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rsbs r4, r2, #0
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rsc r5, r3, #0 @ r4..r5 = -ct00
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@ r2..r3 = ct00
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@ r4..r5 = -ct00
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@ r6 = X1
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@ r7 = X16
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@ r8 = X7
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@ r9 = X10
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@ r10 = K03
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@ r11 = -K02
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@ r12 = -K14
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@ lr = K15
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smlal r4, r5, r10, r6 @ r4..r5 = -ct00 + (X1 * K03)
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smlal r2, r3, r10, r9 @ r2..r3 = ct00 + (X10 * K03)
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smlal r4, r5, r12, r9 @ r4..r5 += (X10 * -K14)
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smlal r2, r3, r12, r6 @ r2..r3 += (X1 * -K14)
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smlal r4, r5, r11, r7 @ r4..r5 += (X16 * -K02)
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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])
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movs r10, r10, lsr #28
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adc r7, r10, lr, lsl #4 @ r7 = bits[59..28] of windowed x6
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smull r10, lr, r11, r8 @ r10..lr = (window_l[10] * x[25])
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ldr r12, =WL9 @ r12 = window_l[9]
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|
movs r10, r10, lsr #28
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adc r8, r10, lr, lsl #4 @ r8 = bits[59..28] of windowed x7
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smull r10, lr, r12, r9 @ r10..lr = (window_l[9] * x[26])
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|
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movs r10, r10, lsr #28
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adc r9, r10, lr, lsl #4 @ r9 = bits[59..28] of windowed x8
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|
|
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stmia r1, { r0, r2 - r9 } @ store windowed x[18] .. x[26]
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|
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|
@----
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@ NB there are 2 possible exits from this function - this is only one of them
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|
@----
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add sp, sp, #(21*4) @ return stack frame
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ldmia sp!, { r4 - r11, pc } @ restore callee saved regs, and return
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|
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|
@----
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stop_block_x0_to_x17:
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@ r0 = x0
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@ r1 = &x[9]
|
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@ 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 = .
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|
|
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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
|
|
|
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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
|
|
@----
|
|
|