misc/libtremor/asm_arm.h
author sheepluva
Thu, 29 Sep 2011 00:13:52 +0200
changeset 6062 2827ded8a5ef
parent 5170 f7e49eff3708
permissions -rw-r--r--
rename misc.{h,cpp} to the name of the class they contain (FreqSpinBox)
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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 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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#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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	       : "cc");
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  return(x);
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}
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#endif
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#ifndef _V_LSP_MATH_ASM
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#define _V_LSP_MATH_ASM
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static inline void lsp_loop_asm(ogg_uint32_t *qip,ogg_uint32_t *pip,
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				ogg_int32_t *qexpp,
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				ogg_int32_t *ilsp,ogg_int32_t wi,
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				ogg_int32_t m){
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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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diff changeset
   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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parents:
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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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parents:
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   150
      "add     %2,%2,#16;"
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parents:
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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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parents:
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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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parents:
diff changeset
   156
      "cmp     r0,%3;\n"
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parents:
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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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parents:
diff changeset
   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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parents:
diff changeset
   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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diff changeset
   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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parents:
diff changeset
   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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parents:
diff changeset
   188
      "mov     r2,#0;"
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parents:
diff changeset
   189
      "orr     r1,%0,%1;"
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parents:
diff changeset
   190
      "tst     r1,#0xff000000;"
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parents:
diff changeset
   191
      "addne   r2,r2,#8;"
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diff changeset
   192
      "movne   r1,r1,lsr #8;"
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parents:
diff changeset
   193
      "tst     r1,#0x00f00000;"
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parents:
diff changeset
   194
      "addne   r2,r2,#4;"
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   195
      "movne   r1,r1,lsr #4;"
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parents:
diff changeset
   196
      "tst     r1,#0x000c0000;"
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parents:
diff changeset
   197
      "addne   r2,r2,#2;"
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diff changeset
   198
      "movne   r1,r1,lsr #2;"
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parents:
diff changeset
   199
      "tst     r1,#0x00020000;"
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parents:
diff changeset
   200
      "addne   r2,r2,#1;"
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diff changeset
   201
      "movne   r1,r1,lsr #1;"
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parents:
diff changeset
   202
      "tst     r1,#0x00010000;"
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parents:
diff changeset
   203
      "addne   r2,r2,#1;"
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parents:
diff changeset
   204
      "mov     %0,%0,lsr r2;"
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parents:
diff changeset
   205
      "mov     %1,%1,lsr r2;"
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parents:
diff changeset
   206
      "add     %2,%2,r2;"
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diff changeset
   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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parents:
diff changeset
   224
      "subeq   %1,%1,#8;"
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parents:
diff changeset
   225
      "tst     %0,#0x0000f000;"
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parents:
diff changeset
   226
      "moveq   %0,%0,lsl #4;"
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parents:
diff changeset
   227
      "subeq   %1,%1,#4;"
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parents:
diff changeset
   228
      "tst     %0,#0x0000c000;"
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parents:
diff changeset
   229
      "moveq   %0,%0,lsl #2;"
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parents:
diff changeset
   230
      "subeq   %1,%1,#2;"
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parents:
diff changeset
   231
      "tst     %0,#0x00008000;"
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parents:
diff changeset
   232
      "moveq   %0,%0,lsl #1;"
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parents:
diff changeset
   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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   237
  *qip=qi;
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   238
  *qexpp=qexp;
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   239
}
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   240
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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   241
#endif
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   242
#endif
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   243