mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-09 04:15:14 +01:00
244 lines
6.4 KiB
C
244 lines
6.4 KiB
C
|
/********************************************************************
|
||
|
|
* *
|
||
|
|
* 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
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
|
||
|
|
|