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Just another MHz saved on ARM for aac he decoding.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27365 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andree Buschmann 2010-07-10 00:11:39 +00:00
parent e7ffe1cd4a
commit 2f271ac54a
1 changed files with 43 additions and 2 deletions
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45
apps/codecs/libfaad/sbr_qmf.c
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@ -109,7 +109,7 @@ void sbr_qmf_analysis_32(sbr_info *sbr, qmfa_info *qmfa, const real_t *input,
/* window and summation to create array u */ /* window and summation to create array u */
for (n = 0; n < 64; n++) for (n = 0; n < 64; n++)
{ {
idx0 = qmfa->x_index + n; idx1 = n * 2 * 5; idx0 = qmfa->x_index + n; idx1 = n * 10;
u[n] = FAAD_ANALYSIS_SCALE1( u[n] = FAAD_ANALYSIS_SCALE1(
MUL_F(qmfa->x[idx0 ], qmf_c[idx1 ]) + MUL_F(qmfa->x[idx0 ], qmf_c[idx1 ]) +
MUL_F(qmfa->x[idx0 + 64], qmf_c[idx1 + 2]) + MUL_F(qmfa->x[idx0 + 64], qmf_c[idx1 + 2]) +
@ -512,7 +512,7 @@ void sbr_qmf_synthesis_64(sbr_info *sbr, qmfs_info *qmfs, qmf_t X[MAX_NTSRHFG][6
p_buf_1 = qmfs->v + qmfs->v_index; p_buf_1 = qmfs->v + qmfs->v_index;
/* calculate 64 output samples and window */ /* calculate 64 output samples and window */
#if !defined(CPU_ARM)
for (k = 0; k < 64; k++) for (k = 0; k < 64; k++)
{ {
idx0 = k*10; idx0 = k*10;
@ -528,6 +528,47 @@ void sbr_qmf_synthesis_64(sbr_info *sbr, qmfs_info *qmfs, qmf_t X[MAX_NTSRHFG][6
MUL_F(p_buf_1[k+1024 ], qmf_c[idx0+8]) + MUL_F(p_buf_1[k+1024 ], qmf_c[idx0+8]) +
MUL_F(p_buf_1[k+1024+192], qmf_c[idx0+9])); MUL_F(p_buf_1[k+1024+192], qmf_c[idx0+9]));
} }
#else
const real_t *qtab = qmf_c;
real_t *pbuf = p_buf_1;
for (k = 0; k < 64; k++, pbuf++)
{
real_t *pout = &output[out++];
asm volatile (
"ldmia %[qtab]!, { r0-r3 } \n\t"
"ldr r4, [%[pbuf]] \n\t"
"smull r5, r6, r4, r0 \n\t"
"ldr r4, [%[pbuf], #192*4] \n\t"
"smlal r5, r6, r4, r1 \n\t"
"ldr r4, [%[pbuf], #256*4] \n\t"
"smlal r5, r6, r4, r2 \n\t"
"ldr r4, [%[pbuf], #448*4] \n\t"
"smlal r5, r6, r4, r3 \n\t"
"ldmia %[qtab]!, { r0-r3 } \n\t"
"ldr r4, [%[pbuf], #512*4] \n\t"
"smlal r5, r6, r4, r0 \n\t"
"ldr r4, [%[pbuf], #704*4] \n\t"
"smlal r5, r6, r4, r1 \n\t"
"ldr r4, [%[pbuf], #768*4] \n\t"
"smlal r5, r6, r4, r2 \n\t"
"ldr r4, [%[pbuf], #960*4] \n\t"
"smlal r5, r6, r4, r3 \n\t"
"ldmia %[qtab]!, { r0-r1 } \n\t"
"mov r2, #1024*4 \n\t"
"ldr r4, [%[pbuf], r2] \n\t"
"smlal r5, r6, r4, r0 \n\t"
"mov r2, #1216*4 \n\t"
"ldr r4, [%[pbuf], r2] \n\t"
"smlal r5, r6, r4, r1 \n\t"
"str r6, [%[pout]] \n"
: [qtab] "+r" (qtab)
: [pbuf] "r" (pbuf), [pout] "r" (pout)
: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "memory");
}
#endif
/* update ringbuffer index */ /* update ringbuffer index */
qmfs->v_index -= 128; qmfs->v_index -= 128;