author | nemo |
Fri, 12 Aug 2011 12:42:50 -0400 | |
changeset 5551 | 0897b947e7a0 |
parent 5170 | f7e49eff3708 |
permissions | -rw-r--r-- |
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/******************************************************************** |
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* * |
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* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * |
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* * |
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * |
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * |
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * |
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* * |
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* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 * |
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* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * |
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* * |
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******************************************************************** |
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|
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function: arm7 and later wide math functions |
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********************************************************************/ |
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#ifdef _ARM_ASSEM_ |
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#if !defined(_V_WIDE_MATH) && !defined(_LOW_ACCURACY_) |
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#define _V_WIDE_MATH |
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static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) { |
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int lo,hi; |
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asm volatile("smull\t%0, %1, %2, %3" |
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: "=&r"(lo),"=&r"(hi) |
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: "%r"(x),"r"(y) |
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: "cc"); |
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return(hi); |
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} |
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static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) { |
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return MULT32(x,y)<<1; |
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} |
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static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) { |
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int lo,hi; |
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asm volatile("smull %0, %1, %2, %3\n\t" |
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"movs %0, %0, lsr #15\n\t" |
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"adc %1, %0, %1, lsl #17\n\t" |
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: "=&r"(lo),"=&r"(hi) |
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: "%r"(x),"r"(y) |
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: "cc"); |
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return(hi); |
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} |
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#define MB() asm volatile ("" : : : "memory") |
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static inline void XPROD32(ogg_int32_t a, ogg_int32_t b, |
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ogg_int32_t t, ogg_int32_t v, |
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ogg_int32_t *x, ogg_int32_t *y) |
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{ |
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int x1, y1, l; |
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asm( "smull %0, %1, %4, %6\n\t" |
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"smlal %0, %1, %5, %7\n\t" |
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"rsb %3, %4, #0\n\t" |
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"smull %0, %2, %5, %6\n\t" |
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"smlal %0, %2, %3, %7" |
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: "=&r" (l), "=&r" (x1), "=&r" (y1), "=r" (a) |
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: "3" (a), "r" (b), "r" (t), "r" (v) |
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: "cc" ); |
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*x = x1; |
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MB(); |
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*y = y1; |
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} |
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static inline void XPROD31(ogg_int32_t a, ogg_int32_t b, |
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ogg_int32_t t, ogg_int32_t v, |
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ogg_int32_t *x, ogg_int32_t *y) |
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{ |
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int x1, y1, l; |
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asm( "smull %0, %1, %4, %6\n\t" |
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"smlal %0, %1, %5, %7\n\t" |
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"rsb %3, %4, #0\n\t" |
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"smull %0, %2, %5, %6\n\t" |
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"smlal %0, %2, %3, %7" |
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: "=&r" (l), "=&r" (x1), "=&r" (y1), "=r" (a) |
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: "3" (a), "r" (b), "r" (t), "r" (v) |
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: "cc" ); |
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*x = x1 << 1; |
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MB(); |
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*y = y1 << 1; |
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} |
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static inline void XNPROD31(ogg_int32_t a, ogg_int32_t b, |
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ogg_int32_t t, ogg_int32_t v, |
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ogg_int32_t *x, ogg_int32_t *y) |
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{ |
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int x1, y1, l; |
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asm( "rsb %2, %4, #0\n\t" |
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"smull %0, %1, %3, %5\n\t" |
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"smlal %0, %1, %2, %6\n\t" |
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"smull %0, %2, %4, %5\n\t" |
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"smlal %0, %2, %3, %6" |
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: "=&r" (l), "=&r" (x1), "=&r" (y1) |
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: "r" (a), "r" (b), "r" (t), "r" (v) |
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: "cc" ); |
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*x = x1 << 1; |
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MB(); |
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*y = y1 << 1; |
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} |
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102 |
|
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#endif |
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#ifndef _V_CLIP_MATH |
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#define _V_CLIP_MATH |
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static inline ogg_int32_t CLIP_TO_15(ogg_int32_t x) { |
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int tmp; |
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asm volatile("subs %1, %0, #32768\n\t" |
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"movpl %0, #0x7f00\n\t" |
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"orrpl %0, %0, #0xff\n" |
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"adds %1, %0, #32768\n\t" |
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"movmi %0, #0x8000" |
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: "+r"(x),"=r"(tmp) |
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: |
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117 |
: "cc"); |
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118 |
return(x); |
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119 |
} |
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120 |
|
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121 |
#endif |
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122 |
|
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123 |
#ifndef _V_LSP_MATH_ASM |
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124 |
#define _V_LSP_MATH_ASM |
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125 |
|
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126 |
static inline void lsp_loop_asm(ogg_uint32_t *qip,ogg_uint32_t *pip, |
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127 |
ogg_int32_t *qexpp, |
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128 |
ogg_int32_t *ilsp,ogg_int32_t wi, |
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129 |
ogg_int32_t m){ |
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130 |
|
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131 |
ogg_uint32_t qi=*qip,pi=*pip; |
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132 |
ogg_int32_t qexp=*qexpp; |
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133 |
|
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134 |
asm("mov r0,%3;" |
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135 |
"mov r1,%5,asr#1;" |
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136 |
"add r0,r0,r1,lsl#3;" |
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137 |
"1:" |
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138 |
|
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139 |
"ldmdb r0!,{r1,r3};" |
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140 |
"subs r1,r1,%4;" //ilsp[j]-wi |
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141 |
"rsbmi r1,r1,#0;" //labs(ilsp[j]-wi) |
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142 |
"umull %0,r2,r1,%0;" //qi*=labs(ilsp[j]-wi) |
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143 |
|
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144 |
"subs r1,r3,%4;" //ilsp[j+1]-wi |
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145 |
"rsbmi r1,r1,#0;" //labs(ilsp[j+1]-wi) |
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146 |
"umull %1,r3,r1,%1;" //pi*=labs(ilsp[j+1]-wi) |
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147 |
|
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148 |
"cmn r2,r3;" // shift down 16? |
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149 |
"beq 0f;" |
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150 |
"add %2,%2,#16;" |
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151 |
"mov %0,%0,lsr #16;" |
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152 |
"orr %0,%0,r2,lsl #16;" |
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153 |
"mov %1,%1,lsr #16;" |
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154 |
"orr %1,%1,r3,lsl #16;" |
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155 |
"0:" |
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156 |
"cmp r0,%3;\n" |
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157 |
"bhi 1b;\n" |
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158 |
|
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159 |
// odd filter assymetry |
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160 |
"ands r0,%5,#1;\n" |
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161 |
"beq 2f;\n" |
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162 |
"add r0,%3,%5,lsl#2;\n" |
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163 |
|
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164 |
"ldr r1,[r0,#-4];\n" |
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165 |
"mov r0,#0x4000;\n" |
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166 |
|
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167 |
"subs r1,r1,%4;\n" //ilsp[j]-wi |
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168 |
"rsbmi r1,r1,#0;\n" //labs(ilsp[j]-wi) |
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169 |
"umull %0,r2,r1,%0;\n" //qi*=labs(ilsp[j]-wi) |
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170 |
"umull %1,r3,r0,%1;\n" //pi*=labs(ilsp[j+1]-wi) |
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171 |
|
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172 |
"cmn r2,r3;\n" // shift down 16? |
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173 |
"beq 2f;\n" |
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174 |
"add %2,%2,#16;\n" |
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175 |
"mov %0,%0,lsr #16;\n" |
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176 |
"orr %0,%0,r2,lsl #16;\n" |
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177 |
"mov %1,%1,lsr #16;\n" |
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178 |
"orr %1,%1,r3,lsl #16;\n" |
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179 |
|
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180 |
//qi=(pi>>shift)*labs(ilsp[j]-wi); |
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181 |
//pi=(qi>>shift)*labs(ilsp[j+1]-wi); |
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182 |
//qexp+=shift; |
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183 |
|
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184 |
//} |
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185 |
|
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186 |
/* normalize to max 16 sig figs */ |
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187 |
"2:" |
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188 |
"mov r2,#0;" |
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189 |
"orr r1,%0,%1;" |
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190 |
"tst r1,#0xff000000;" |
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191 |
"addne r2,r2,#8;" |
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192 |
"movne r1,r1,lsr #8;" |
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193 |
"tst r1,#0x00f00000;" |
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194 |
"addne r2,r2,#4;" |
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195 |
"movne r1,r1,lsr #4;" |
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196 |
"tst r1,#0x000c0000;" |
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197 |
"addne r2,r2,#2;" |
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198 |
"movne r1,r1,lsr #2;" |
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199 |
"tst r1,#0x00020000;" |
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200 |
"addne r2,r2,#1;" |
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201 |
"movne r1,r1,lsr #1;" |
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202 |
"tst r1,#0x00010000;" |
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203 |
"addne r2,r2,#1;" |
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204 |
"mov %0,%0,lsr r2;" |
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205 |
"mov %1,%1,lsr r2;" |
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206 |
"add %2,%2,r2;" |
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207 |
|
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208 |
: "+r"(qi),"+r"(pi),"+r"(qexp) |
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209 |
: "r"(ilsp),"r"(wi),"r"(m) |
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210 |
: "r0","r1","r2","r3","cc"); |
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211 |
|
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212 |
*qip=qi; |
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213 |
*pip=pi; |
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214 |
*qexpp=qexp; |
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215 |
} |
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216 |
|
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217 |
static inline void lsp_norm_asm(ogg_uint32_t *qip,ogg_int32_t *qexpp){ |
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218 |
|
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219 |
ogg_uint32_t qi=*qip; |
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220 |
ogg_int32_t qexp=*qexpp; |
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221 |
|
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222 |
asm("tst %0,#0x0000ff00;" |
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223 |
"moveq %0,%0,lsl #8;" |
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224 |
"subeq %1,%1,#8;" |
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225 |
"tst %0,#0x0000f000;" |
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226 |
"moveq %0,%0,lsl #4;" |
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227 |
"subeq %1,%1,#4;" |
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228 |
"tst %0,#0x0000c000;" |
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229 |
"moveq %0,%0,lsl #2;" |
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230 |
"subeq %1,%1,#2;" |
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231 |
"tst %0,#0x00008000;" |
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232 |
"moveq %0,%0,lsl #1;" |
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233 |
"subeq %1,%1,#1;" |
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234 |
: "+r"(qi),"+r"(qexp) |
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235 |
: |
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236 |
: "cc"); |
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*qip=qi; |
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*qexpp=qexp; |
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} |
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#endif |
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#endif |
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