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-rw-r--r--Tremolo/asm_arm.h245
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diff --git a/Tremolo/asm_arm.h b/Tremolo/asm_arm.h
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--- a/Tremolo/asm_arm.h
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-/********************************************************************
- * *
- * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
- * *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
- * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
- * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
- * *
- * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
- * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
- * *
- ********************************************************************
-
- function: arm7 and later wide math functions
-
- ********************************************************************/
-
-#ifdef _ARM_ASSEM_
-
-#if !defined(_V_WIDE_MATH) && !defined(_LOW_ACCURACY_)
-#define _V_WIDE_MATH
-
-static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) {
- int lo,hi;
- asm volatile("smull\t%0, %1, %2, %3"
- : "=&r"(lo),"=&r"(hi)
- : "%r"(x),"r"(y)
- : "cc");
- return(hi);
-}
-
-static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) {
- return MULT32(x,y)<<1;
-}
-
-static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
- int lo,hi;
- asm volatile("smull %0, %1, %2, %3\n\t"
- "movs %0, %0, lsr #15\n\t"
- "adc %1, %0, %1, lsl #17\n\t"
- : "=&r"(lo),"=&r"(hi)
- : "%r"(x),"r"(y)
- : "cc");
- return(hi);
-}
-
-#define MB() asm volatile ("" : : : "memory")
-
-static inline void XPROD32(ogg_int32_t a, ogg_int32_t b,
- ogg_int32_t t, ogg_int32_t v,
- ogg_int32_t *x, ogg_int32_t *y)
-{
- int x1, y1, l;
- asm( "smull %0, %1, %4, %6\n\t"
- "smlal %0, %1, %5, %7\n\t"
- "rsb %3, %4, #0\n\t"
- "smull %0, %2, %5, %6\n\t"
- "smlal %0, %2, %3, %7"
- : "=&r" (l), "=&r" (x1), "=&r" (y1), "=r" (a)
- : "3" (a), "r" (b), "r" (t), "r" (v)
- : "cc" );
- *x = x1;
- MB();
- *y = y1;
-}
-
-/* x = (a*t + b*v)>>31, y = (b*t - a*v)>>31 */
-static inline void XPROD31(ogg_int32_t a, ogg_int32_t b,
- ogg_int32_t t, ogg_int32_t v,
- ogg_int32_t *x, ogg_int32_t *y)
-{
- int x1, y1, l;
- asm( "smull %0, %1, %4, %6\n\t"
- "smlal %0, %1, %5, %7\n\t"
- "rsb %3, %4, #0\n\t"
- "smull %0, %2, %5, %6\n\t"
- "smlal %0, %2, %3, %7"
- : "=&r" (l), "=&r" (x1), "=&r" (y1), "=r" (a)
- : "3" (a), "r" (b), "r" (t), "r" (v)
- : "cc" );
- *x = x1 << 1;
- MB();
- *y = y1 << 1;
-}
-
-/* x = (a*t - b*v)>>31, y = (b*t + a*v)>>31 */
-static inline void XNPROD31(ogg_int32_t a, ogg_int32_t b,
- ogg_int32_t t, ogg_int32_t v,
- ogg_int32_t *x, ogg_int32_t *y)
-{
- int x1, y1, l;
- asm( "rsb %2, %4, #0\n\t"
- "smull %0, %1, %3, %5\n\t"
- "smlal %0, %1, %2, %6\n\t"
- "smull %0, %2, %4, %5\n\t"
- "smlal %0, %2, %3, %6"
- : "=&r" (l), "=&r" (x1), "=&r" (y1)
- : "r" (a), "r" (b), "r" (t), "r" (v)
- : "cc" );
- *x = x1 << 1;
- MB();
- *y = y1 << 1;
-}
-
-#endif
-
-#ifndef _V_CLIP_MATH
-#define _V_CLIP_MATH
-
-static inline ogg_int32_t CLIP_TO_15(ogg_int32_t x) {
- int tmp;
- asm volatile("subs %1, %0, #32768\n\t"
- "movpl %0, #0x7f00\n\t"
- "orrpl %0, %0, #0xff\n"
- "adds %1, %0, #32768\n\t"
- "movmi %0, #0x8000"
- : "+r"(x),"=r"(tmp)
- :
- : "cc");
- return(x);
-}
-
-#endif
-
-#ifndef _V_LSP_MATH_ASM
-#define _V_LSP_MATH_ASM
-
-static inline void lsp_loop_asm(ogg_uint32_t *qip,ogg_uint32_t *pip,
- ogg_int32_t *qexpp,
- ogg_int32_t *ilsp,ogg_int32_t wi,
- ogg_int32_t m){
-
- ogg_uint32_t qi=*qip,pi=*pip;
- ogg_int32_t qexp=*qexpp;
-
- asm("mov r0,%3;"
- "mov r1,%5,asr#1;"
- "add r0,r0,r1,lsl#3;"
- "1:"
-
- "ldmdb r0!,{r1,r3};"
- "subs r1,r1,%4;" //ilsp[j]-wi
- "rsbmi r1,r1,#0;" //labs(ilsp[j]-wi)
- "umull %0,r2,r1,%0;" //qi*=labs(ilsp[j]-wi)
-
- "subs r1,r3,%4;" //ilsp[j+1]-wi
- "rsbmi r1,r1,#0;" //labs(ilsp[j+1]-wi)
- "umull %1,r3,r1,%1;" //pi*=labs(ilsp[j+1]-wi)
-
- "cmn r2,r3;" // shift down 16?
- "beq 0f;"
- "add %2,%2,#16;"
- "mov %0,%0,lsr #16;"
- "orr %0,%0,r2,lsl #16;"
- "mov %1,%1,lsr #16;"
- "orr %1,%1,r3,lsl #16;"
- "0:"
- "cmp r0,%3;\n"
- "bhi 1b;\n"
-
- // odd filter assymetry
- "ands r0,%5,#1;\n"
- "beq 2f;\n"
- "add r0,%3,%5,lsl#2;\n"
-
- "ldr r1,[r0,#-4];\n"
- "mov r0,#0x4000;\n"
-
- "subs r1,r1,%4;\n" //ilsp[j]-wi
- "rsbmi r1,r1,#0;\n" //labs(ilsp[j]-wi)
- "umull %0,r2,r1,%0;\n" //qi*=labs(ilsp[j]-wi)
- "umull %1,r3,r0,%1;\n" //pi*=labs(ilsp[j+1]-wi)
-
- "cmn r2,r3;\n" // shift down 16?
- "beq 2f;\n"
- "add %2,%2,#16;\n"
- "mov %0,%0,lsr #16;\n"
- "orr %0,%0,r2,lsl #16;\n"
- "mov %1,%1,lsr #16;\n"
- "orr %1,%1,r3,lsl #16;\n"
-
- //qi=(pi>>shift)*labs(ilsp[j]-wi);
- //pi=(qi>>shift)*labs(ilsp[j+1]-wi);
- //qexp+=shift;
-
- //}
-
- /* normalize to max 16 sig figs */
- "2:"
- "mov r2,#0;"
- "orr r1,%0,%1;"
- "tst r1,#0xff000000;"
- "addne r2,r2,#8;"
- "movne r1,r1,lsr #8;"
- "tst r1,#0x00f00000;"
- "addne r2,r2,#4;"
- "movne r1,r1,lsr #4;"
- "tst r1,#0x000c0000;"
- "addne r2,r2,#2;"
- "movne r1,r1,lsr #2;"
- "tst r1,#0x00020000;"
- "addne r2,r2,#1;"
- "movne r1,r1,lsr #1;"
- "tst r1,#0x00010000;"
- "addne r2,r2,#1;"
- "mov %0,%0,lsr r2;"
- "mov %1,%1,lsr r2;"
- "add %2,%2,r2;"
-
- : "+r"(qi),"+r"(pi),"+r"(qexp)
- : "r"(ilsp),"r"(wi),"r"(m)
- : "r0","r1","r2","r3","cc");
-
- *qip=qi;
- *pip=pi;
- *qexpp=qexp;
-}
-
-static inline void lsp_norm_asm(ogg_uint32_t *qip,ogg_int32_t *qexpp){
-
- ogg_uint32_t qi=*qip;
- ogg_int32_t qexp=*qexpp;
-
- asm("tst %0,#0x0000ff00;"
- "moveq %0,%0,lsl #8;"
- "subeq %1,%1,#8;"
- "tst %0,#0x0000f000;"
- "moveq %0,%0,lsl #4;"
- "subeq %1,%1,#4;"
- "tst %0,#0x0000c000;"
- "moveq %0,%0,lsl #2;"
- "subeq %1,%1,#2;"
- "tst %0,#0x00008000;"
- "moveq %0,%0,lsl #1;"
- "subeq %1,%1,#1;"
- : "+r"(qi),"+r"(qexp)
- :
- : "cc");
- *qip=qi;
- *qexpp=qexp;
-}
-
-#endif
-#endif
-
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