author | hgs |
Wed, 13 Oct 2010 19:39:18 +0530 | |
changeset 71 | 28ccaba883f4 |
parent 18 | genericopenlibs/liboil/src/motovec/vec_memset.s@47c74d1534e1 |
permissions | -rw-r--r-- |
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//------------------------------------------------------------------ |
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// file: vec_memset.S |
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// AltiVec enabled version of memset and bzero and cacheable_memzero |
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//------------------------------------------------------------------ |
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|
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//------------------------------------------------------------------ |
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// Copyright Motorola, Inc. 2002 |
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// ALL RIGHTS RESERVED |
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// |
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// You are hereby granted a copyright license to use, modify, and |
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// distribute the SOFTWARE so long as this entire notice is retained |
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// without alteration in any modified and/or redistributed versions, |
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// and that such modified versions are clearly identified as such. |
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// No licenses are granted by implication, estoppel or otherwise under |
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// any patents or trademarks of Motorola, Inc. |
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// |
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// The SOFTWARE is provided on an "AS IS" basis and without warranty. |
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// To the maximum extent permitted by applicable law, MOTOROLA DISCLAIMS |
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// ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, INCLUDING IMPLIED |
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// WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR |
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// PURPOSE AND ANY WARRANTY AGAINST INFRINGEMENT WITH |
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// REGARD TO THE SOFTWARE (INCLUDING ANY MODIFIED VERSIONS |
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// THEREOF) AND ANY ACCOMPANYING WRITTEN MATERIALS. |
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// |
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// To the maximum extent permitted by applicable law, IN NO EVENT SHALL |
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// MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER |
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// (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF |
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// BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS |
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// INFORMATION, OR OTHER PECUNIARY LOSS) ARISING OF THE USE OR |
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// INABILITY TO USE THE SOFTWARE. Motorola assumes no responsibility |
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// for the maintenance and support of the SOFTWARE. |
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//------------------------------------------------------------------ |
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//------------------------------------------------------------------ |
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// extern void *memset( void *ptr, int val, size_t len ); |
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// Copies val into each of len characters beginning at ptr. |
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// - Harbison&Steele 4th ed |
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// (despite val being an int, this memset assumes it is never |
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// more than a byte. That seems to be correct from all the |
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// memset functions I've seen but I don't know if ANSI allows |
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// anthing longer. Chuck Corley 12/21/02) |
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// Returns: |
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// void * ptr |
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//------------------------------------------------------------------ |
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//------------------------------------------------------------------ |
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// extern void * bzero( char *ptr, int len); |
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// Copies 0 into each of len characters at ptr. |
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// - Harbison&Steele 4th ed |
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// Returns: |
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// void * ptr |
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//------------------------------------------------------------------ |
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// Revision History: |
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// Rev 0.0 Original Chuck Corley 02/09/03 |
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// Could benefit from changes added to memcpy |
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// Rev 0.1 Revised per memcpy Rev 0.30 Chuck Corley 05/01/03 |
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// |
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// This is beta quality code; users are encouraged to make it faster. |
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// ASSUMPTIONS: |
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// Code is highly likely to be in the cache; data is not (streaming data) |
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// Zero fill could be quite likely. |
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// Moving fill byte from GPR to VR as below faster than stw->lvebx via stack |
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#define VRSV 256 // VRSAVE spr |
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// Don't use vectors for BC <= MIN_VEC. Works only if MIN_VEC >= 16 bytes. |
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#define MIN_VEC 16 |
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// Register useage |
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#define Rt r0 // r0 when used as a temporary register |
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#define DST r3 // entering: dest pointer; exiting: same dest pointer |
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#define FILL r4 // entering: fill char then fill word |
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#define BC r5 // entering: Byte_Count then remaining Byte_Count |
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#define DBC r6// dst + byte count |
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#define BK r7 // BC - 1 +/- (n*16) |
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#define Fsh r8 // fill byte shifted right one nibble |
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#define DM1 r9// dst -1 for byte-by-byte backwards initially |
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#define D r9 // (dst+16)[0:27] - dst[28:31] |
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#define DNX r9 // (dst+n*16)[28:31] |
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#define BL r9 // second byte_kount index pointer |
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#define DR r10 // (dst+16)[0:27] |
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#define QW r10 // number of cache lines |
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#define DBK r11 // (dst+byte_count-1) then (dst+byte_count-1)[28:31] |
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#define RSV r12 // storage for VRSAVE register if used |
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// Condition register use (not including temporary cr0) |
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// cr0[2] = (FILL==0)? |
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// cr1[0,2] = (BC == 0)? 1 : 0; (nothing to move) |
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// then cr1[2] = (DST[28:31] == 0)? 1 : 0; (D0 left justified) |
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// then cr1[2] = ((DBK = DST+BC-1)[28:31] = 0xF)? 1 : 0; (DN right justified) |
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// cr6[2] = (QW == 0)? 1 : 0; |
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// then cr6[1] = (QW > 4)? 1 : 0; (>4 vectors to move?) |
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// then cr6[3] = (third store[27] == 1)? 1: 0; (cache line alignment) |
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// then cr6[3] = (last store[27] == 1)? 1: 0; (last store odd?) |
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// cr7[2] = (BC>MIN_VEC)?1:0; (BC big enough to warrant vectors) |
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// then cr7[0:3] = (DST+16)[0:27]-DST (How many bytes (iff <16) in first vector?) |
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// then cr7[0:3] = (DST+BC)[0:27] (How many bytes (iff <16) in last vector?) |
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108 |
|
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// Conditionalize the use of dcba. It will help if the data is |
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// not in cache and hurt if it is. Generally, except for small |
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// benchmarks repeated many times, we assume data is not in cache |
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// (data streaming) and using dcba is a performance boost. |
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// We use dcba which will noop to non-cacheable memory rather than |
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// dcbz which will cause an aligment exception. |
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#ifndef NO_DCBA |
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#if defined(__GNUC__) || defined(__MWERKS__) || defined(_DIAB_TOOL) |
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// gcc and codewarrior and diab don't assemble dcba |
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#define DCBK .long 0x7c033dec |
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// dcba r3,r7 or dcba DST,BK |
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120 |
#else |
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#ifdef __ghs__ |
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.macro DCBK |
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.long 0x7c033dec |
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124 |
.endm |
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125 |
#else |
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#define DCBK dcba DST,BK |
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#endif // __ghs__ |
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#endif // __GNUC__ or __MWERKS__ |
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129 |
#else |
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#define DCBK nop |
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#endif // NO_DCBA |
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132 |
|
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133 |
.text |
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134 |
#ifdef __MWERKS__ |
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135 |
.align 32 |
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136 |
#else |
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137 |
.align 5 |
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138 |
#endif |
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139 |
|
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140 |
#ifdef LIBMOTOVEC |
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141 |
.globl memset |
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142 |
memset: |
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143 |
#else |
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.globl _vec_memset |
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145 |
_vec_memset: |
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146 |
#endif |
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147 |
|
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cmpi cr7,0,BC,MIN_VEC // IU1 Check for minimum byte count |
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cmpi cr1,0,BC,0 // IU1 Eliminate zero byte count |
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rlwinm. Fsh,FILL,28,28,3 // IU1 Is fill byte zero? and shift |
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151 |
|
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addi DM1,DST,-1 // IU1 Pre-bias and duplicate destination |
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addi DR,DST,16 // IU1 Address of second dst vector |
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add DBC,DST,BC // IU1 Address of last dst byte + 1 |
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bgt cr7,v_memset // b if BC>MIN_VEC |
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156 |
|
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mtctr BC // for (i=1;i<=BC;i++) |
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beqlr cr1 // return if BC = 0 |
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Byte_set: |
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stbu FILL,1(DM1) // LSU * ++(DST-1) = FILL |
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161 |
bdnz Byte_set |
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162 |
|
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163 |
blr |
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164 |
|
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165 |
v_memset: |
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// Byte count < MIN_VEC bytes will have been set by scalar code above, |
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// so this will not deal with small block sets < MIN_VEC. |
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168 |
|
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// For systems using VRSAVE, define VRSAV=1 when compiling. For systems |
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// that don't, make sure VRSAVE is undefined. |
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171 |
#ifdef VRSAVE |
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mfspr RSV,VRSV // IU2 Get current VRSAVE contents |
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173 |
#endif |
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rlwinm DR,DR,0,0,27 // IU1 (DST+16)[0:27] |
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addi DBK,DBC,-1 // IU1 Address of last dst byte |
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176 |
|
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177 |
#ifdef VRSAVE |
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oris Rt,RSV,0xe000 // IU1 Or in registers used by this routine |
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#endif |
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subf D,DST,DR // IU1 How many bytes in first destination? |
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li BK,0 // IU1 Initialize byte kount index |
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182 |
|
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183 |
#ifdef VRSAVE |
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mtspr VRSV,Rt // IU2 Save in VRSAVE before first vec op |
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185 |
#endif |
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vxor v0,v0,v0 // VIU Clear v0 |
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subf QW,DR,DBK // IU1 Bytes of full vectors to move (-16) |
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cmpi cr1,0,D,16 // IU1 Is D0 left justified? |
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beq+ enter_bzero // b if FILL==0 |
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190 |
|
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lvsl v0,0,Fsh // LSU Move upper nibble to byte 0 of VR |
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vspltisb v1,4 // VPU Splat 0x4 to every byte |
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193 |
|
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lvsl v2,0,FILL // LSU Move lower nibble to byte 0 of VR |
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195 |
|
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vslb v0,v0,v1 // VIU Move upper nibble to VR[0:3] |
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197 |
|
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vor v0,v0,v2 // VIU Form FILL byte in VR[0:7] |
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199 |
|
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diff
changeset
|
200 |
vspltb v0,v0,0 // VPU Splat the fill byte to all bytes |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
201 |
enter_bzero: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
202 |
mtcrf 0x01,D // IU2 Put bytes in 1st dst in cr7 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
rlwinm QW,QW,28,4,31 // IU1 Quad words remaining |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
204 |
beq cr1,Left_just // b if D0 is left justified |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
205 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
206 |
bns cr7,No_B_fwd // b if only even number of bytes to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
207 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
208 |
stvebx v0,DST,BK // LSU store first byte at DST+0 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
209 |
addi BK,BK,1 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
210 |
No_B_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
211 |
bne cr7,No_H_fwd // b if only words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
212 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
213 |
stvehx v0,DST,BK // LSU store halfword at DST+0/1 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
214 |
addi BK,BK,2 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
215 |
No_H_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
216 |
bng cr7,No_W1_fwd // b if exactly zero or two words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
217 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
218 |
stvewx v0,DST,BK // LSU store word 1 of one or three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
219 |
addi BK,BK,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
220 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
221 |
No_W1_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
222 |
bnl cr7,No_W2_fwd // b if there was only one word to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
223 |
stvewx v0,DST,BK // LSU store word 1 of two or 2 of three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
224 |
addi BK,BK,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
225 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
226 |
stvewx v0,DST,BK // LSU store word 2 of two or 3 of three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
227 |
b No_W2_fwd |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
228 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
229 |
Left_just: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
230 |
stvx v0,0,DST // LSU Store 16 bytes at D0 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
231 |
No_W2_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
232 |
rlwinm Rt,DBK,0,28,31 // IU1 (DBK = DST+BC-1)[28:31] |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
233 |
cmpi cr6,0,QW,0 // IU1 Any full vectors to move? |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
234 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
235 |
li BK,16 // IU1 Re-initialize byte kount index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
236 |
cmpi cr1,0,Rt,0xF // IU1 Is DN right justified? |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
237 |
ble cr6,Last_QW // b if no Quad words to do |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
238 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
239 |
mtctr QW // IU2 for (i=0;i<=QW;i++) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
240 |
cmpi cr6,0,QW,4 // IU1 Check QW>4 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
241 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
242 |
QW_loop: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
243 |
stvx v0,DST,BK // LSU Store 16 fill bytes |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
244 |
addi BK,BK,16 // IU1 Increment byte kount index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
245 |
bdnzf 25,QW_loop // b if 4 or less quad words to do |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
246 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
247 |
add DNX,DST,BK // IU1 address of next store (DST+32 if QW>4) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
248 |
addi QW,QW,-1 // IU1 One more QW stored by now |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
249 |
bgt cr6,GT_4QW_fwd // b if >4 quad words left |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
250 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
251 |
Last_QW: // Next vector is the last; we're done. |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
252 |
mtcrf 0x01,DBC // IU2 Put final vector byte count in cr7 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
253 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
254 |
beq cr1,Rt_just_fwd // b if last destination is right justified |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
255 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
256 |
rlwinm DBK,DBK,0,0,27 // IU1 Round to QW addr of last byte |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
257 |
li BL,0 // IU1 Initialize index pointer |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
258 |
bnl cr7,Only_1W_fwd // b if there was only one or zero words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
259 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
260 |
stvewx v0,DBK,BL // LSU store word 1 of two or three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
261 |
addi BL,BL,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
262 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
263 |
stvewx v0,DBK,BL // LSU store word 2 of two or three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
264 |
addi BL,BL,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
265 |
Only_1W_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
266 |
bng cr7,Only_2W_fwd // b if there were only two or zero words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
267 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
268 |
stvewx v0,DBK,BL // LSU store word 3 of three if necessary |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
269 |
addi BL,BL,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
270 |
Only_2W_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
271 |
bne cr7,Only_B_fwd // b if there are no half words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
272 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
273 |
stvehx v0,DBK,BL // LSU store one halfword if necessary |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
274 |
addi BL,BL,2 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
275 |
Only_B_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
276 |
bns cr7,All_done_fwd // b if there are no bytes to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
277 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
278 |
stvebx v0,DBK,BL // LSU store one byte if necessary |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
279 |
b All_done_fwd |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
280 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
281 |
Rt_just_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
282 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
283 |
stvx v0,DST,BK // LSU Store 16 bytes at D14 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
284 |
All_done_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
285 |
#ifdef VRSAVE |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
286 |
mtspr VRSV,RSV // IU1 Restore VRSAVE |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
287 |
#endif |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
288 |
blr // Return destination address from entry |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
289 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
290 |
#ifdef __MWERKS__ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
291 |
.align 16 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
292 |
#else |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
293 |
.align 4 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
294 |
#endif |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
295 |
GT_4QW_fwd: // Do once if nxt st is to odd half of cache line, else twice |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
296 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
297 |
addi QW,QW,-1 // IU1 Keeping track of QWs stored |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
298 |
mtcrf 0x02,DNX // IU2 cr6[3]=((DST+32)[27]==1)?1:0; |
47c74d1534e1
Revision: 201011
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|
299 |
addi DNX,DNX,16 // IU1 Update cr6 for next loop |
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Revision: 201011
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|
300 |
|
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|
301 |
stvx v0,DST,BK // LSU Store 16 bytes at D2 |
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302 |
addi BK,BK,16 // IU1 Increment byte count by 16 |
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|
303 |
bdnzf 27,GT_4QW_fwd // b if next store is to lower (even) half of CL |
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|
304 |
|
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|
305 |
mtcrf 0x02,DBK // IU2 cr6[3]=((last store)[27]==1)?1:0; (odd?) |
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|
306 |
|
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|
307 |
bns cr6,B32_fwd // b if DST[27] == 0; i.e, final store is even |
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|
308 |
|
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309 |
// We need the ctr register to reflect an even byte count before entering |
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310 |
// the next block - faster to decrement than to reload. |
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|
311 |
bdnz B32_fwd // decrement counter for last QW store odd |
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|
312 |
|
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313 |
B32_fwd: // Should be at least 2 stores remaining and next 2 are cache aligned |
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314 |
DCBK // LSU then Kill instead of RWITM |
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315 |
|
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stvx v0,DST,BK // LSU Store 16 bytes at D11 |
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317 |
addi BK,BK,16 // IU1 Increment byte count |
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318 |
bdz Nxt_loc_fwd // always decrement and branch to next instr |
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|
319 |
|
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320 |
Nxt_loc_fwd: |
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321 |
stvx v0,DST,BK // LSU Store 16 bytes at D12 |
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322 |
addi BK,BK,16 // IU1 Increment byte count |
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323 |
bdnz B32_fwd // b if there are at least two more QWs to do |
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324 |
|
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bso cr6,One_even_QW // b if there is one even and one odd QW to store |
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326 |
b Last_QW // b if last store is to even address |
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327 |
|
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328 |
// Come here with two more loads and two stores to do |
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329 |
One_even_QW: |
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330 |
stvx v0,DST,BK // LSU Store 16 bytes at D13 |
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331 |
addi BK,BK,16 // IU1 Increment byte count |
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332 |
|
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333 |
b Last_QW |
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334 |
|
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335 |
// End of memset in AltiVec |
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336 |
|
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#define BCz r4 // in bzero r4 enters with byte count |
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338 |
|
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339 |
#ifdef __MWERKS__ |
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.align 32 |
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341 |
#else |
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.align 5 |
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#endif |
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|
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#ifdef LIBMOTOVEC |
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.globl bzero |
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bzero: |
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#else |
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349 |
.globl vec_bzero |
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vec_bzero: |
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351 |
#endif |
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352 |
|
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mr BC,BCz // IU1 arg[2] is BC here, not FILL |
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354 |
li FILL,0 // IU1 for bzero FILL=0 |
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355 |
#ifdef LIBMOTOVEC |
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356 |
b memset |
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357 |
#else |
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358 |
b _vec_memset |
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359 |
#endif |
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360 |
|
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361 |
// cacheable_memzero will employ dcbz to clear 32 bytes at a time |
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362 |
// of cacheable memory. Like bzero, second entering argument will be BC. |
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// Using this for non-cacheable memory will generate an alignment exception. |
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364 |
|
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365 |
.text |
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366 |
#ifdef __MWERKS__ |
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367 |
.align 32 |
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368 |
#else |
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369 |
.align 5 |
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370 |
#endif |
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|
371 |
|
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372 |
#ifdef LIBMOTOVEC |
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373 |
.globl cacheable_memzero |
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374 |
cacheable_memzero: |
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375 |
#else |
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376 |
.globl vec_cacheable_memzero |
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377 |
vec_cacheable_memzero: |
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378 |
#endif |
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|
379 |
|
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380 |
mr BC,BCz // IU1 arg[2] is BC here, not FILL |
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381 |
li FILL,0 // IU1 for bzero FILL=0 |
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382 |
cmpi cr7,0,BC,MIN_VEC // IU1 Check for minimum byte count |
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383 |
|
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384 |
cmpi cr1,0,BC,0 // IU1 Eliminate zero byte count |
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|
385 |
|
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386 |
addi DM1,DST,-1 // IU1 Pre-bias and duplicate destination |
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387 |
addi DR,DST,16 // IU1 Address of second dst vector |
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|
388 |
add DBC,DST,BC // IU1 Address of last dst byte + 1 |
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389 |
bgt cr7,c_v_memset // b if BC>MIN_VEC |
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|
390 |
|
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mtctr BC // for (i=1;i<=BC;i++) |
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392 |
beqlr cr1 // return if BC = 0 |
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393 |
c_Byte_set: |
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394 |
stbu FILL,1(DM1) // LSU * ++(DST-1) = FILL |
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395 |
bdnz c_Byte_set |
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|
396 |
|
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|
397 |
blr |
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|
398 |
|
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|
399 |
c_v_memset: |
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400 |
// Byte count < MIN_VEC bytes will have been set by scalar code above, |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
401 |
// so this will not deal with small block sets < MIN_VEC. |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
402 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
403 |
// For systems using VRSAVE, define VRSAV=1 when compiling. For systems |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
404 |
// that don't, make sure VRSAVE is undefined. |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
405 |
#ifdef VRSAVE |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
406 |
mfspr RSV,VRSV // IU2 Get current VRSAVE contents |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
407 |
#endif |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
408 |
rlwinm DR,DR,0,0,27 // IU1 (DST+16)[0:27] |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
409 |
addi DBK,DBC,-1 // IU1 Address of last dst byte |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
410 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
411 |
#ifdef VRSAVE |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
412 |
oris Rt,RSV,0x8000 // IU1 Or in registers used by this routine |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
413 |
#endif |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
414 |
subf D,DST,DR // IU1 How many bytes in first destination? |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
415 |
li BK,0 // IU1 Initialize byte kount index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
416 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
417 |
#ifdef VRSAVE |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
418 |
mtspr VRSV,Rt // IU2 Save in VRSAVE before first vec op |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
419 |
#endif |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
420 |
vxor v0,v0,v0 // VIU Clear v0 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
421 |
subf QW,DR,DBK // IU1 Bytes of full vectors to move (-16) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
422 |
cmpi cr1,0,D,16 // IU1 Is D0 left justified? |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
423 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
424 |
mtcrf 0x01,D // IU2 Put bytes in 1st dst in cr7 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
425 |
rlwinm QW,QW,28,4,31 // IU1 Quad words remaining |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
426 |
beq cr1,c_Left_just // b if D0 is left justified |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
427 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
428 |
bns cr7,c_No_B_fwd // b if only even number of bytes to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
429 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
430 |
stvebx v0,DST,BK // LSU store first byte at DST+0 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
431 |
addi BK,BK,1 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
432 |
c_No_B_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
433 |
bne cr7,c_No_H_fwd // b if only words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
434 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
435 |
stvehx v0,DST,BK // LSU store halfword at DST+0/1 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
436 |
addi BK,BK,2 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
437 |
c_No_H_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
438 |
bng cr7,c_No_W1_fwd // b if exactly zero or two words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
439 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
440 |
stvewx v0,DST,BK // LSU store word 1 of one or three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
441 |
addi BK,BK,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
442 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
443 |
c_No_W1_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
444 |
bnl cr7,c_No_W2_fwd // b if there was only one word to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
445 |
stvewx v0,DST,BK // LSU store word 1 of two or 2 of three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
446 |
addi BK,BK,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
447 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
448 |
stvewx v0,DST,BK // LSU store word 2 of two or 3 of three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
449 |
b c_No_W2_fwd |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
450 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
451 |
c_Left_just: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
452 |
stvx v0,0,DST // LSU Store 16 bytes at D0 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
453 |
c_No_W2_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
454 |
rlwinm Rt,DBK,0,28,31 // IU1 (DBK = DST+BC-1)[28:31] |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
455 |
cmpi cr6,0,QW,0 // IU1 Any full vectors to move? |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
456 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
457 |
li BK,16 // IU1 Re-initialize byte kount index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
458 |
cmpi cr1,0,Rt,0xF // IU1 Is DN right justified? |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
459 |
ble cr6,c_Last_QW // b if no Quad words to do |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
460 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
461 |
mtctr QW // IU2 for (i=0;i<=QW;i++) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
462 |
cmpi cr6,0,QW,4 // IU1 Check QW>4 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
463 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
464 |
c_QW_loop: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
465 |
stvx v0,DST,BK // LSU Store 16 fill bytes |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
466 |
addi BK,BK,16 // IU1 Increment byte kount index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
467 |
bdnzf 25,c_QW_loop // b if 4 or less quad words to do |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
468 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
469 |
add DNX,DST,BK // IU1 address of next store (DST+32 if QW>4) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
470 |
addi QW,QW,-1 // IU1 One more QW stored by now |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
471 |
bgt cr6,c_GT_4QW_fwd // b if >4 quad words left |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
472 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
473 |
c_Last_QW: // Next vector is the last; we're done. |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
474 |
mtcrf 0x01,DBC // IU2 Put final vector byte count in cr7 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
475 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
476 |
beq cr1,c_Rt_just_fwd // b if last destination is right justified |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
477 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
478 |
rlwinm DBK,DBK,0,0,27 // IU1 Round to QW addr of last byte |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
479 |
li BL,0 // IU1 Initialize index pointer |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
480 |
bnl cr7,c_Only_1W_fwd // b if there was only one or zero words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
481 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
482 |
stvewx v0,DBK,BL // LSU store word 1 of two or three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
483 |
addi BL,BL,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
484 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
485 |
stvewx v0,DBK,BL // LSU store word 2 of two or three |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
486 |
addi BL,BL,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
487 |
c_Only_1W_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
488 |
bng cr7,Only_2W_fwd // b if there were only two or zero words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
489 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
490 |
stvewx v0,DBK,BL // LSU store word 3 of three if necessary |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
491 |
addi BL,BL,4 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
492 |
c_Only_2W_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
493 |
bne cr7,c_Only_B_fwd // b if there are no half words to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
494 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
495 |
stvehx v0,DBK,BL // LSU store one halfword if necessary |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
496 |
addi BL,BL,2 // IU1 increment index |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
497 |
c_Only_B_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
498 |
bns cr7,c_All_done_fwd // b if there are no bytes to store |
47c74d1534e1
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
499 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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500 |
stvebx v0,DBK,BL // LSU store one byte if necessary |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
501 |
b c_All_done_fwd |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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|
502 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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503 |
c_Rt_just_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
504 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
505 |
stvx v0,DST,BK // LSU Store 16 bytes at D14 |
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
506 |
c_All_done_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
507 |
#ifdef VRSAVE |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
508 |
mtspr VRSV,RSV // IU1 Restore VRSAVE |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
509 |
#endif |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
510 |
blr // Return destination address from entry |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
511 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
512 |
#ifdef __MWERKS__ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
513 |
.align 16 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
changeset
|
514 |
#else |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
515 |
.align 4 |
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
516 |
#endif |
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
517 |
c_GT_4QW_fwd: // Do once if nxt st is to odd half of cache line, else twice |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
518 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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|
519 |
addi QW,QW,-1 // IU1 Keeping track of QWs stored |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
520 |
mtcrf 0x02,DNX // IU2 cr6[3]=((DST+32)[27]==1)?1:0; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
521 |
addi DNX,DNX,16 // IU1 Update cr6 for next loop |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
522 |
|
47c74d1534e1
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
523 |
stvx v0,DST,BK // LSU Store 16 bytes at D2 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
524 |
addi BK,BK,16 // IU1 Increment byte count by 16 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
525 |
bdnzf 27,c_GT_4QW_fwd // b if next store is to lower (even) half of CL |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
526 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
527 |
mtcrf 0x02,DBK // IU2 cr6[3]=((last store)[27]==1)?1:0; (odd?) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
528 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
529 |
bns cr6,c_B32_fwd // b if DST[27] == 0; i.e, final store is even |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
530 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
531 |
// We need the ctr register to reflect an even byte count before entering |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
532 |
// the next block - faster to decrement than to reload. |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
533 |
bdnz B32_fwd // decrement counter for last QW store odd |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
534 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
535 |
c_B32_fwd: // Should be at least 2 stores remaining and next 2 are cache aligned |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
536 |
dcbz DST,BK // LSU zero whole cache line |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
537 |
bdz c_Nxt_loc_fwd // always decrement and branch to next instr |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
538 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
539 |
c_Nxt_loc_fwd: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
540 |
addi BK,BK,32 // IU1 Increment byte count |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
541 |
bdnz B32_fwd // b if there are at least two more QWs to do |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
542 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
543 |
bso cr6,c_One_even_QW // b if there is one even and one odd QW to store |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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|
544 |
b c_Last_QW // b if last store is to even address |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
545 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
546 |
// Come here with two more loads and two stores to do |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
547 |
c_One_even_QW: |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
548 |
stvx v0,DST,BK // LSU Store 16 bytes at D13 |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
549 |
addi BK,BK,16 // IU1 Increment byte count |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
550 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
551 |
b c_Last_QW |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
552 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
553 |
// End of cacheable_memzero in AltiVec |