/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * Copyright (C) 2013 Michael Sevakis (jhMikeS) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #if !SPC_NOINTERP #define SPC_GAUSSIAN_FAST_INTERP static inline int gaussian_fast_interp( int16_t const* samples, int32_t position, int16_t const* fwd, int16_t const* rev ) { int output; int t0, t1, t2, t3; asm volatile ( "ldrh %[t0], [%[samp]] \n" /* t0=s0 */ "ldrh %[t2], [%[fwd]] \n" /* t2=f0 */ "ldrh %[t1], [%[samp], #2] \n" /* t1=s1 */ "ldrh %[t3], [%[fwd], #2] \n" /* r3=f1 */ "smulbb %[out], %[t0], %[t2] \n" /* out=s0*f0 */ "ldrh %[t2], [%[rev], #2] \n" /* r2=r1 */ "ldrh %[t0], [%[samp], #4] \n" /* t0=s2 */ "smlabb %[out], %[t1], %[t3], %[out] \n" /* out+=s1*f1 */ "ldrh %[t3], [%[rev]] \n" /* t3=r0 */ "ldrh %[t1], [%[samp], #6] \n" /* t1=s3 */ "smlabb %[out], %[t0], %[t2], %[out] \n" /* out+=s2*r1 */ "smlabb %[out], %[t1], %[t3], %[out] \n" /* out+=s3*r0 */ : [out]"=&r"(output), [t0]"=&r"(t0), [t1]"=&r"(t1), [t2]"=&r"(t2), [t3]"=&r"(t3) : [fwd]"r"(fwd), [rev]"r"(rev), [samp]"r"(samples + (position >> 12))); return output; } #define SPC_GAUSSIAN_FAST_AMP static inline int gaussian_fast_amp( struct voice_t* voice, int output, int* amp_0, int* amp_1 ) { asm volatile ( "smulwb %[out], %[out], %[envx] \n" : [out]"+r"(output) : [envx]"r"(voice->envx)); asm volatile ( "mov %[out], %[out], asl #6 \n" "smulwb %[a0], %[out], %[v0] \n" "smulwb %[a1], %[out], %[v1] \n" "mov %[out], %[out], asr #5 \n" : [out]"+r"(output), [a0]"=&r"(*amp_0), [a1]"=r"(*amp_1) : [v0]"r"(voice->volume [0]), [v1]"r"(voice->volume [1])); return output; } #define SPC_GAUSSIAN_SLOW_INTERP static inline int gaussian_slow_interp( int16_t const* samples, int32_t position, int16_t const* fwd, int16_t const* rev ) { int output; int t0, t1, t2, t3; asm volatile ( "ldrsh %[t0], [%[samp]] \n" /* t0=s0 */ "ldrh %[t2], [%[fwd]] \n" /* t2=f0 */ "ldrsh %[t1], [%[samp], #2] \n" /* t1=s1 */ "ldrh %[t3], [%[fwd], #2] \n" /* t3=f1 */ "smulwb %[out], %[t0], %[t2] \n" /* out=s0*f0>>16 */ "ldrsh %[t0], [%[samp], #4] \n" /* t0=s2 */ "ldrh %[t2], [%[rev], #2] \n" /* t2=r1 */ "smlawb %[out], %[t1], %[t3], %[out] \n" /* out+=s1*f1>>16 */ "ldrsh %[t1], [%[samp], #6] \n" /* t1=s3 */ "ldrh %[t3], [%[rev]] \n" /* t3=r0 */ "smlawb %[out], %[t0], %[t2], %[out] \n" /* out+=s2*r1>>16 */ "smulwb %[t0], %[t1], %[t3] \n" /* t0=s3*r0>>16 */ "mov %[out], %[out], asl #17 \n" /* out=(int16_t)(out*2) */ "mov %[t0], %[t0], asl #1 \n" /* out+=t0*2 */ "add %[out], %[t0], %[out], asr #16 \n" : [out]"=&r"(output), [t0]"=&r"(t0), [t1]"=&r"(t1), [t2]"=&r"(t2), [t3]"=&r"(t3) : [fwd]"r"(fwd), [rev]"r"(rev), [samp]"r"(samples + (position >> 12))); return CLAMP16( output ); } #define SPC_GAUSSIAN_SLOW_AMP static inline int gaussian_slow_amp( struct voice_t* voice, int output, int* amp_0, int* amp_1 ) { asm volatile ( "smulbb %[out], %[out], %[envx]" : [out]"+r"(output) : [envx]"r"(voice->envx)); asm volatile ( "mov %[out], %[out], asr #11 \n" "bic %[out], %[out], #0x1 \n" "smulbb %[a0], %[out], %[v0] \n" "smulbb %[a1], %[out], %[v1] \n" : [out]"+r"(output), [a0]"=&r"(*amp_0), [a1]"=r"(*amp_1) : [v0]"r"(voice->volume [0]), [v1]"r"(voice->volume [1])); return output; } #endif /* !SPC_NOINTERP */ #if !SPC_NOECHO #define SPC_DSP_ECHO_APPLY /* Echo filter history */ static int32_t fir_buf[FIR_BUF_CNT] IBSS_ATTR_SPC __attribute__(( aligned(FIR_BUF_ALIGN*1) )); static inline void echo_init( struct Spc_Dsp* this ) { this->fir.ptr = fir_buf; ci->memset( fir_buf, 0, sizeof fir_buf ); } static inline void echo_apply( struct Spc_Dsp* this, uint8_t *echo_ptr, int* out_0, int* out_1 ) { /* Keep last 8 samples */ int32_t* fir_ptr; int t0; asm volatile ( "ldr %[t0], [%[ep]] \n" "add %[p], %[t_p], #4 \n" "bic %[t_p], %[p], %[mask] \n" "str %[t0], [%[p], #-4] \n" /* duplicate at +8 eliminates wrap checking below */ "str %[t0], [%[p], #28] \n" : [p]"=&r"(fir_ptr), [t_p]"+r"(this->fir.ptr), [t0]"=&r"(t0) : [ep]"r"(echo_ptr), [mask]"i"(~FIR_BUF_MASK)); int32_t* fir_coeff = (int32_t *)this->fir.coeff; asm volatile ( "ldmia %[c]!, { r0-r1 } \n" /* C0C1-C2C3 = r0-r1 */ "ldmia %[p]!, { r2-r5 } \n" /* L1R1-L4R4 = r2-r5 */ "smulbb %[acc0], %[t0], r0 \n" /* acc0 = L0*C0 */ "smultb %[acc1], %[t0], r0 \n" /* acc1 = R0*C0 */ "smlabt %[acc0], r2, r0, %[acc0] \n" /* acc0 += L1*C1 */ "smlatt %[acc1], r2, r0, %[acc1] \n" /* acc1 += R1*C1 */ "smlabb %[acc0], r3, r1, %[acc0] \n" /* acc0 += L2*C2 */ "smlatb %[acc1], r3, r1, %[acc1] \n" /* acc1 += R2*C2 */ "smlabt %[acc0], r4, r1, %[acc0] \n" /* acc0 += L3*C3 */ "smlatt %[acc1], r4, r1, %[acc1] \n" /* acc1 += R3*C3 */ "ldmia %[c], { r0-r1 } \n" /* C4C5-C6C7 = r0-r1 */ "ldmia %[p], { r2-r4 } \n" /* L5R5-L7R7 = r2-r5 */ "smlabb %[acc0], r5, r0, %[acc0] \n" /* acc0 += L4*C4 */ "smlatb %[acc1], r5, r0, %[acc1] \n" /* acc1 += R4*C4 */ "smlabt %[acc0], r2, r0, %[acc0] \n" /* acc0 += L5*C5 */ "smlatt %[acc1], r2, r0, %[acc1] \n" /* acc1 += R5*C5 */ "smlabb %[acc0], r3, r1, %[acc0] \n" /* acc0 += L6*C6 */ "smlatb %[acc1], r3, r1, %[acc1] \n" /* acc1 += R6*C6 */ "smlabt %[acc0], r4, r1, %[acc0] \n" /* acc0 += L7*C7 */ "smlatt %[acc1], r4, r1, %[acc1] \n" /* acc1 += R7*C7 */ : [t0]"+r"(t0), [acc0]"=&r"(*out_0), [acc1]"=&r"(*out_1), [p]"+r"(fir_ptr), [c]"+r"(fir_coeff) : : "r0", "r1", "r2", "r3", "r4", "r5"); } #define SPC_DSP_ECHO_FEEDBACK static inline void echo_feedback(struct Spc_Dsp* this, uint8_t* echo_ptr, int echo_0, int echo_1, int fb_0, int fb_1) { int e0, e1; asm volatile ( "mov %[e0], %[ei0], asl #7 \n" "mov %[e1], %[ei1], asl #7 \n" "mla %[e0], %[fb0], %[ef], %[e0] \n" "mla %[e1], %[fb1], %[ef], %[e1] \n" : [e0]"=&r"(e0), [e1]"=&r"(e1) : [ei0]"r"(echo_0), [ei1]"r"(echo_1), [fb0]"r"(fb_0), [fb1]"r"(fb_1), [ef]"r"((int)this->r.g.echo_feedback)); e0 = CLAMP16( e0 >> 14 ); SET_LE16A( echo_ptr , e0 ); e1 = CLAMP16( e1 >> 14 ); SET_LE16A( echo_ptr + 2, e1 ); } #define SPC_DSP_GENERATE_OUTPUT static inline void echo_output( struct Spc_Dsp* this, int global_muting, int global_vol_0, int global_vol_1, int chans_0, int chans_1, int fb_0, int fb_1, int* out_0, int* out_1 ) { int t0, t1; asm volatile ( "mul %[t0], %[gv0], %[ch0] \n" "mul %[t1], %[gv1], %[ch1] \n" : [t0]"=&r"(t0), [t1]"=r"(t1) : [gv0]"r"(global_vol_0), [gv1]"r"(global_vol_1), [ch0]"r"(chans_0), [ch1]"r"(chans_1)); asm volatile ( "mla %[t0], %[i0], %[ev0], %[t0] \n" "mla %[t1], %[i1], %[ev1], %[t1] \n" : [t0]"+r"(t0), [t1]"+r"(t1) : [i0]"r"(fb_0), [i1]"r"(fb_1), [ev0]"r"((int)this->r.g.echo_volume_0), [ev1]"r"((int)this->r.g.echo_volume_1)); asm volatile ( "mov %[o0], %[t0], asr %[gm] \n" "mov %[o1], %[t1], asr %[gm] \n" : [o0]"=&r"(*out_0), [o1]"=r"(*out_1) : [t0]"r"(t0), [t1]"r"(t1), [gm]"r"(global_muting)); } #endif /* SPC_NOECHO */