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336 lines
10 KiB
ArmAsm
336 lines
10 KiB
ArmAsm
; PowerPC optimized zoom for Goom
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; © 2001-2003 Guillaume Borios
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; This library is free software; you can redistribute it and/or
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; modify it under the terms of the GNU Library General Public
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; License as published by the Free Software Foundation; either
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; version 2 of the License, or (at your option) any later version.
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;
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; This library 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 GNU
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; Library General Public License for more details.
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;
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; You should have received a copy of the GNU Library General Public
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; License along with this library; if not, write to the
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; Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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; Boston, MA 02110-1301, USA.
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; Change log :
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; 21 Dec 2003 : Use of altivec is now determined with a parameter
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; Section definition : We use a read only section
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.text
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; name of the function to call by C program : ppc_zoom
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; We declare this label as a global to extend its scope outside this file
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.globl _ppc_zoom_generic
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.globl _ppc_zoom_G4
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; Description :
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; This routine dynamically computes and applies a zoom filter
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; parameters :
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; r3 <=> unsigned int sizeX (in pixels)
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; r4 <=> unsigned int sizeY (in pixels)
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; r5 <=> unsigned int * frompixmap
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; r6 <=> unsigned int * topixmap
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; r7 <=> unsigned int * brutS
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; r8 <=> unsigned int * brutD
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; r9 <=> unsigned int buffratio
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; r10 <=> int [16][16] precalccoeffs
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; globals after init
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; r5 <=> frompixmap - 1 byte needed for preincremental fetch (replaces r5)
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; r6 <=> topixmap - 1 byte needed for preincremental fetch (replaces r6)
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; r3 <=> ax = x max in 16th of pixels (replaces old r3)
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; r4 <=> ay = y max in 16th of pixels (replaces old r4)
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; r20 <=> row size in bytes
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; r12 <=> 0xFF00FF (mask for parallel 32 bits pixs computing)
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; r30 <=> brutS - 1 byte needed for preincremental fetch (replaces r7)
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; r31 <=> brutD - 1 byte needed for preincremental fetch (replaces r8)
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; ABI notes :
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; r1 is the Stack Pointer (SP) => Do not use
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; r13..r31 are non-volatiles => Do not use
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_ppc_zoom_generic:
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; Saves the used non volatile registers in the Mach-O stack s Red-Zone
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stmw r18,-56(r1)
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; init
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li r18,0 ; Default value if out of range : 0 (Black)
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mr r11,r10
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lis r12,0xFF
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mullw r2,r3,r4 ; Number of pixels to compute
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subi r30,r8,0
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slwi r20,r3,2
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srawi r19,r20,2
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ori r12,r12,0xFF
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subi r3,r3,1
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subi r4,r4,1
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mtspr ctr,r2 ; Init the loop count (one loop per pixel computed)
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subi r31,r7,0
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subi r6,r6,4
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slwi r3,r3,4
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slwi r4,r4,4
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;pre init for loop
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lwz r2,0(r31) ; px
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lwz r29,4(r31) ; py
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lwz r8,0(r30) ; px2
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lwz r10,4(r30) ; py2
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b L1
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.align 5
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L1:
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; computes dynamically the position to fetch
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sub r8,r8,r2
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sub r10,r10,r29
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mullw r8,r8,r9
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addi r31,r31,8
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mullw r10,r10,r9
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addi r30,r30,8
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srawi r8,r8,16
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srawi r10,r10,16
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add r2,r2,r8
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add r29,r29,r10
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; if px>ax or py>ay goto outofrange
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; computes the attenuation coeffs and the original point address
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rlwinm r10,r2,6,28-6,31-6 ; r10 <- (r2 << 2) & 0x000002D0 (r10=(r2%16)*4*16)
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cmpl cr4,0,r2,r3
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rlwimi r10, r29, 2, 28-2, 31-2 ; r10 <- ((r29 << 2) & 0x0000002D) | (r10 & !0x0000002D) (r10=(r10%16)*4 | r10)
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cmpl cr7,0,r29,r4
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srawi r29,r29,4 ; pos computing
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bge- cr4,L4
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srawi r2,r2,4 ; pos computing
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mullw r29, r29,r19 ; pos computing
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bge- cr7,L4
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; Channels notation : 00112233 (AARRVVBB)
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add r2,r2,r29 ; pos computing
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lwzx r10,r11,r10 ; Loads coefs
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slwi r2,r2,2 ; pos computing
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add r2,r2,r5 ; pos computing
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rlwinm r21,r10,0,24,31 ; Isolates coef1 (??????11 -> 00000011)
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lwz r25,0(r2) ; Loads col1 -> r25
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lwz r26,4(r2) ; Loads col2 -> r26
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rlwinm r22,r10,24,24,31 ; Isolates coef2 (????22?? -> 00000022)
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rlwinm r23,r10,16,24,31 ; Isolates coef3 (??33???? -> 00000033)
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add r2,r2,r20 ; Adds one line for future load of col3 and col4
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and r8, r25,r12 ; Masks col1 channels 1 & 3 : 0x00XX00XX
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rlwinm r24,r10,8,24,31 ; Isolates coef4 (44?????? -> 00000044)
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andi. r25,r25,0xFF00 ; Masks col1 channel 2 : 0x0000XX00
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mullw r8, r8, r21 ; Applies coef1 on col1 channels 1 & 3
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; computes final pixel color
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and r10,r26,r12 ; Masks col2 channels 1 & 3 : 0x00XX00XX
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lwz r27,0(r2) ; Loads col3 -> r27
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mullw r10,r10,r22 ; Applies coef2 on col2 channels 1 & 3
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mullw r25,r25,r21 ; Applies coef1 on col1 channel 2
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andi. r29,r26,0xFF00 ; Masks col2 channel 2 : 0x0000XX00
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mullw r29,r29,r22 ; Applies coef2 on col2 channel 2
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lwz r28,4(r2) ; Loads col4 -> r28
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add r8 ,r8 ,r10 ; Adds col1 & col2 channels 1 & 3
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and r10,r27,r12 ; Masks col3 channels 1 & 3 : 0x00XX00XX
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add r25,r25,r29 ; Adds col1 & col2 channel 2
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mullw r10,r10,r23 ; Applies coef3 on col3 channels 1 & 3
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andi. r29,r27,0xFF00 ; Masks col3 channel 2 : 0x0000XX00
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mullw r29,r29,r23 ; Applies coef3 on col3 channel 2
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lwz r2,0(r31) ; px
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add r7 ,r8 ,r10 ; Adds col3 to (col1 + col2) channels 1 & 3
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and r10,r28,r12 ; Masks col4 channels 1 & 3 : 0x00XX00XX
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mullw r10,r10,r24 ; Applies coef4 on col4 channels 1 & 3
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add r25,r25,r29 ; Adds col 3 to (col1 + col2) channel 2
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lwz r8,0(r30) ; px2
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andi. r28,r28,0xFF00 ; Masks col4 channel 2 : 0x0000XX00
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add r7 ,r7 ,r10 ; Adds col4 to (col1 + col2 + col3) channels 1 & 3
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lwz r10,4(r30) ; py2
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mullw r28,r28,r24 ; Applies coef4 on col4 channel 2
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srawi r7, r7, 8 ; (sum of channels 1 & 3) >> 8
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lwz r29,4(r31) ; py
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add r25,r25,r28 ; Adds col 4 to (col1 + col2 + col3) channel 2
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rlwimi r7, r25, 24, 16, 23 ; (((sum of channels 2) >> 8 ) & 0x0000FF00) | ((sum of channels 1 and 3) & 0xFFFF00FF)
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stwu r7,4(r6) ; Stores the computed pixel
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bdnz L1 ; Iterate again if needed
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b L3 ;goto end ; If not, returns from the function
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; if out of range
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L4:
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stwu r18,4(r6)
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lwz r8,0(r30) ; px2
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lwz r10,4(r30) ; py2
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lwz r2,0(r31) ; px
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lwz r29,4(r31) ; py
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bdnz L1
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L3:
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; Restore saved registers and return
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lmw r18,-56(r1)
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blr
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_ppc_zoom_G4:
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; Saves the used non volatile registers in the Mach-O stack s Red-Zone
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stmw r17,-60(r1)
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; init
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li r18,0 ; Default value if out of range : 0 (Black)
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mr r11,r10
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lis r12,0xFF
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mullw r2,r3,r4 ; Number of pixels to compute
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subi r30,r8,0
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slwi r20,r3,2
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srawi r19,r20,2
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ori r12,r12,0xFF
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subi r3,r3,1
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subi r4,r4,1
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mtspr ctr,r2 ; Init the loop count (one loop per pixel computed)
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subi r31,r7,0
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subi r6,r6,4
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slwi r3,r3,4
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slwi r4,r4,4
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;pre init for loop
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lwz r2,0(r31) ; px
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lwz r29,4(r31) ; py
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lwz r8,0(r30) ; px2
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lwz r10,4(r30) ; py2
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;*********************
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lis r17,0x0F01
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b L100
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.align 5
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L100:
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addi r6,r6,4
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; Optimization to ensure the destination buffer
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; won't be loaded into the data cache
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rlwinm. r0,r6,0,27,31
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bne+ L500
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dcbz 0,r6
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;dcba 0,r6
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L500:
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; computes dynamically the position to fetch
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;mullw r8,r8,r29
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;mullw r2,r2,r29
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;add r2,r8,r2
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;srawi r2,r2,17
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sub r8,r8,r2
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sub r10,r10,r29
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mullw r8,r8,r9
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addi r31,r31,8
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mullw r10,r10,r9
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addi r30,r30,8
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dst r30,r17,0
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srawi r8,r8,16
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srawi r10,r10,16
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add r2,r2,r8
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add r29,r29,r10
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dst r31,r17,1
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; if px>ax or py>ay goto outofrange
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; computes the attenuation coeffs and the original point address
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rlwinm r10,r2,6,28-6,31-6 ; r10 <- (r2 << 2) & 0x000002D0 (r10=(r2%16)*4*16)
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cmpl cr4,0,r2,r3
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rlwimi r10, r29, 2, 28-2, 31-2 ; r10 <- ((r29 << 2) & 0x0000002D) | (r10 & !0x0000002D) (r10=(r29%16)*4 | r10)
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cmpl cr7,0,r29,r4
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srawi r29,r29,4 ; pos computing
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bge- cr4,L400
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srawi r2,r2,4 ; pos computing
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mullw r29, r29,r19 ; pos computing
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bge- cr7,L400
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; Channels notation : 00112233 (AARRVVBB)
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add r2,r2,r29 ; pos computing
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lwzx r10,r11,r10 ; Loads coefs
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slwi r2,r2,2 ; pos computing
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add r2,r2,r5 ; pos computing
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rlwinm r21,r10,0,24,31 ; Isolates coef1 (??????11 -> 00000011)
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lwz r25,0(r2) ; Loads col1 -> r25
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lwz r26,4(r2) ; Loads col2 -> r26
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rlwinm r22,r10,24,24,31 ; Isolates coef2 (????22?? -> 00000022)
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rlwinm r23,r10,16,24,31 ; Isolates coef3 (??33???? -> 00000033)
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add r2,r2,r20 ; Adds one line for future load of col3 and col4
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and r8, r25,r12 ; Masks col1 channels 1 & 3 : 0x00XX00XX
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rlwinm r24,r10,8,24,31 ; Isolates coef4 (44?????? -> 00000044)
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dst r2,r17,2
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rlwinm r25,r25,0,16,23 ; Masks col1 channel 2 : 0x0000XX00
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;andi. r25,r25,0xFF00 ; Masks col1 channel 2 : 0x0000XX00
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mullw r8, r8, r21 ; Applies coef1 on col1 channels 1 & 3
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; computes final pixel color
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and r10,r26,r12 ; Masks col2 channels 1 & 3 : 0x00XX00XX
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lwz r27,0(r2) ; Loads col3 -> r27
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mullw r10,r10,r22 ; Applies coef2 on col2 channels 1 & 3
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mullw r25,r25,r21 ; Applies coef1 on col1 channel 2
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rlwinm r29,r26,0,16,23 ; Masks col2 channel 2 : 0x0000XX00
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;andi. r29,r26,0xFF00 ; Masks col2 channel 2 : 0x0000XX00
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mullw r29,r29,r22 ; Applies coef2 on col2 channel 2
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lwz r28,4(r2) ; Loads col4 -> r28
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add r8 ,r8 ,r10 ; Adds col1 & col2 channels 1 & 3
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and r10,r27,r12 ; Masks col3 channels 1 & 3 : 0x00XX00XX
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add r25,r25,r29 ; Adds col1 & col2 channel 2
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mullw r10,r10,r23 ; Applies coef3 on col3 channels 1 & 3
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rlwinm r29,r27,0,16,23 ; Masks col3 channel 2 : 0x0000XX00
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;andi. r29,r27,0xFF00 ; Masks col3 channel 2 : 0x0000XX00
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mullw r29,r29,r23 ; Applies coef3 on col3 channel 2
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lwz r2,0(r31) ; px
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add r7 ,r8 ,r10 ; Adds col3 to (col1 + col2) channels 1 & 3
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and r10,r28,r12 ; Masks col4 channels 1 & 3 : 0x00XX00XX
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mullw r10,r10,r24 ; Applies coef4 on col4 channels 1 & 3
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add r25,r25,r29 ; Adds col 3 to (col1 + col2) channel 2
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lwz r8,0(r30) ; px2
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rlwinm r28,r28,0,16,23 ; Masks col4 channel 2 : 0x0000XX00
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;andi. r28,r28,0xFF00 ; Masks col4 channel 2 : 0x0000XX00
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add r7 ,r7 ,r10 ; Adds col4 to (col1 + col2 + col3) channels 1 & 3
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lwz r10,4(r30) ; py2
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mullw r28,r28,r24 ; Applies coef4 on col4 channel 2
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srawi r7, r7, 8 ; (sum of channels 1 & 3) >> 8
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lwz r29,4(r31) ; py
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add r25,r25,r28 ; Adds col 4 to (col1 + col2 + col3) channel 2
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rlwimi r7, r25, 24, 16, 23 ; (((sum of channels 2) >> 8 ) & 0x0000FF00) | ((sum of channels 1 and 3) & 0xFFFF00FF)
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stw r7,0(r6) ; Stores the computed pixel
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bdnz L100 ; Iterate again if needed
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b L300 ;goto end ; If not, returns from the function
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; if out of range
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L400:
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stw r18,0(r6)
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lwz r8,0(r30) ; px2
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lwz r10,4(r30) ; py2
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lwz r2,0(r31) ; px
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lwz r29,4(r31) ; py
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bdnz L100
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L300:
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; Restore saved registers and return
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lmw r17,-60(r1)
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blr
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