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ARMv6 versions of X(N)PROD31 macros and MULT32 macro. Saves about 1MHz or 3% decoding vorbis on gigabeat S.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26889 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2010-06-17 15:24:23 +00:00
parent 231c26f8f4
commit 7afea91560
1 changed files with 89 additions and 59 deletions
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112
apps/codecs/lib/asm_arm.h
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@ -19,20 +19,30 @@
#if !defined(_V_WIDE_MATH) && !defined(_LOW_ACCURACY_)
#define _V_WIDE_MATH
#if ARM_ARCH >= 6
static inline int32_t MULT32(int32_t x, int32_t y) {
int lo,hi;
asm volatile("smull\t%0, %1, %2, %3"
int32_t hi;
asm volatile("smmul %[hi], %[x], %[y] \n\t"
: [hi] "=&r" (hi)
: [x] "r" (x), [y] "r" (y) );
return(hi);
}
#else
static inline int32_t MULT32(int32_t x, int32_t y) {
int32_t lo, hi;
asm volatile("smull\t%0, %1, %2, %3 \n\t"
: "=&r"(lo),"=&r"(hi)
: "r"(x),"r"(y) );
return(hi);
}
#endif
static inline int32_t MULT31(int32_t x, int32_t y) {
return MULT32(x,y)<<1;
}
static inline int32_t MULT31_SHIFT15(int32_t x, int32_t y) {
int lo,hi;
int32_t 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"
@ -44,8 +54,8 @@ static inline int32_t MULT31_SHIFT15(int32_t x, int32_t y) {
#define XPROD32(a, b, t, v, x, y) \
{ \
long l; \
asm( "smull %0, %1, %3, %5\n\t" \
int32_t l; \
asm("smull %0, %1, %3, %5\n\t" \
"rsb %2, %6, #0\n\t" \
"smlal %0, %1, %4, %6\n\t" \
"smull %0, %2, %3, %2\n\t" \
@ -54,42 +64,40 @@ static inline int32_t MULT31_SHIFT15(int32_t x, int32_t y) {
: "r" ((a)), "r" ((b)), "r" ((t)), "r" ((v)) ); \
}
static inline void XPROD31(int32_t a, int32_t b,
int32_t t, int32_t v,
int32_t *x, int32_t *y)
{
int x1, y1, l;
asm( "smull %0, %1, %3, %5\n\t"
"rsb %2, %6, #0\n\t"
"smlal %0, %1, %4, %6\n\t"
"smull %0, %2, %3, %2\n\t"
"smlal %0, %2, %4, %5"
: "=&r" (l), "=&r" (x1), "=&r" (y1)
: "r" (a), "r" (b), "r" (t), "r" (v) );
*x = x1 << 1;
*y = y1 << 1;
}
static inline void XNPROD31(int32_t a, int32_t b,
int32_t t, int32_t v,
int32_t *x, int32_t *y)
{
int x1, y1, l;
asm( "smull %0, %1, %3, %5\n\t"
"rsb %2, %4, #0\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) );
*x = x1 << 1;
*y = y1 << 1;
}
#if ARM_ARCH >= 6
/* These may yield slightly different result from the macros below
because only the high 32 bits of the multiplications are accumulated while
the below macros use a 64 bit accumulator that is truncated to 32 bits.*/
#define XPROD31_R(_a, _b, _t, _v, _x, _y)\
{\
int x1, y1, l;\
asm( "smull %0, %1, %5, %3\n\t"\
int32_t x1, y1;\
asm("smmul %[x1], %[t], %[a] \n\t"\
"smmul %[y1], %[t], %[b] \n\t"\
"smmla %[x1], %[v], %[b], %[x1] \n\t"\
"smmls %[y1], %[v], %[a], %[y1] \n\t"\
: [x1] "=&r" (x1), [y1] "=&r" (y1)\
: [a] "r" (_a), [b] "r" (_b), [t] "r" (_t), [v] "r" (_v) );\
_x = x1 << 1;\
_y = y1 << 1;\
}
#define XNPROD31_R(_a, _b, _t, _v, _x, _y)\
{\
int32_t x1, y1;\
asm("smmul %[x1], %[t], %[a] \n\t"\
"smmul %[y1], %[t], %[b] \n\t"\
"smmls %[x1], %[v], %[b], %[x1] \n\t"\
"smmla %[y1], %[v], %[a], %[y1] \n\t"\
: [x1] "=&r" (x1), [y1] "=&r" (y1)\
: [a] "r" (_a), [b] "r" (_b), [t] "r" (_t), [v] "r" (_v) );\
_x = x1 << 1;\
_y = y1 << 1;\
}
#else
#define XPROD31_R(_a, _b, _t, _v, _x, _y)\
{\
int32_t x1, y1, l;\
asm("smull %0, %1, %5, %3\n\t"\
"rsb %2, %3, #0\n\t"\
"smlal %0, %1, %6, %4\n\t"\
"smull %0, %2, %6, %2\n\t"\
@ -102,8 +110,8 @@ static inline void XNPROD31(int32_t a, int32_t b,
#define XNPROD31_R(_a, _b, _t, _v, _x, _y)\
{\
int x1, y1, l;\
asm( "smull %0, %1, %5, %3\n\t"\
int32_t x1, y1, l;\
asm("smull %0, %1, %5, %3\n\t"\
"rsb %2, %4, #0\n\t"\
"smlal %0, %1, %6, %2\n\t"\
"smull %0, %2, %5, %4\n\t"\
@ -113,6 +121,28 @@ static inline void XNPROD31(int32_t a, int32_t b,
_x = x1 << 1;\
_y = y1 << 1;\
}
#endif
static inline void XPROD31(int32_t a, int32_t b,
int32_t t, int32_t v,
int32_t *x, int32_t *y)
{
int32_t _x1, _y1;
XPROD31_R(a, b, t, v, _x1, _y1);
*x = _x1;
*y = _y1;
}
static inline void XNPROD31(int32_t a, int32_t b,
int32_t t, int32_t v,
int32_t *x, int32_t *y)
{
int32_t _x1, _y1;
XNPROD31_R(a, b, t, v, _x1, _y1);
*x = _x1;
*y = _y1;
}
#ifndef _V_VECT_OPS
#define _V_VECT_OPS