/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * Copyright (C) 2007-2010 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 ( "ldrsh %[t0], [%[samp]] \n" "ldrsh %[t2], [%[fwd]] \n" "ldrsh %[t1], [%[samp], #2] \n" "ldrsh %[t3], [%[fwd], #2] \n" "mul %[out], %[t0], %[t2] \n" /* out= fwd[0]*samp[0] */ "ldrsh %[t0], [%[samp], #4] \n" "ldrsh %[t2], [%[rev], #2] \n" "mla %[out], %[t1], %[t3], %[out] \n" /* out+=fwd[1]*samp[1] */ "ldrsh %[t1], [%[samp], #6] \n" "ldrsh %[t3], [%[rev]] \n" "mla %[out], %[t0], %[t2], %[out] \n" /* out+=rev[1]*samp[2] */ "mla %[out], %[t1], %[t3], %[out] \n" /* out+=rev[0]*samp[3] */ : [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; } #if 0 // first asm block generates "Rd and Rm should be different in mul" error #define SPC_GAUSSIAN_FAST_AMP static inline int gaussian_fast_amp( struct voice_t* voice, int output, int* amp_0, int* amp_1 ) { int t0; asm volatile ( "mov %[t0], %[out], asr #11 \n" "mul %[out], %[t0], %[envx] \n" : [out]"+r"(output), [t0]"=&r"(t0) : [envx]"r"((int) voice->envx)); asm volatile ( "mov %[out], %[out], asr #11 \n" "mul %[a0], %[out], %[v0] \n" "mul %[a1], %[out], %[v1] \n" : [out]"+r"(output), [a0]"=&r"(*amp_0), [a1]"=r"(*amp_1) : [v0]"r"((int) voice->volume [0]), [v1]"r"((int) voice->volume [1])); return output; } #endif #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" "ldrsh %[t2], [%[fwd]] \n" "ldrsh %[t1], [%[samp], #2] \n" "ldrsh %[t3], [%[fwd], #2] \n" "mul %[out], %[t2], %[t0] \n" /* fwd[0]*samp[0] */ "ldrsh %[t2], [%[rev], #2] \n" "mul %[t0], %[t3], %[t1] \n" /* fwd[1]*samp[1] */ "ldrsh %[t1], [%[samp], #4] \n" "mov %[out], %[out], asr #12 \n" "ldrsh %[t3], [%[rev]] \n" "mul %[t2], %[t1], %[t2] \n" /* rev[1]*samp[2] */ "ldrsh %[t1], [%[samp], #6] \n" "add %[t0], %[out], %[t0], asr #12 \n" "mul %[t3], %[t1], %[t3] \n" /* rev[0]*samp[3] */ "add %[t2], %[t0], %[t2], asr #12 \n" "mov %[t2], %[t2], lsl #17 \n" "mov %[t3], %[t3], asr #12 \n" "mov %[t3], %[t3], asl #1 \n" "add %[out], %[t3], %[t2], 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 ) { int t0; asm volatile ( "mul %[t0], %[out], %[envx]" : [t0]"=r"(t0) : [out]"r"(output), [envx]"r"((int) voice->envx)); asm volatile ( "mov %[t0], %[t0], asr #11 \n" "bic %[t0], %[t0], #0x1 \n" "mul %[a0], %[t0], %[v0] \n" "mul %[a1], %[t0], %[v1] \n" : [t0]"+r"(t0), [a0]"=&r"(*amp_0), [a1]"=r"(*amp_1) : [v0]"r"((int) voice->volume [0]), [v1]"r"((int) voice->volume [1])); return t0; } #else /* SPC_NOINTERP */ #define SPC_LINEAR_INTERP static inline int linear_interp( int16_t const* samples, int32_t position ) { int output = (int) samples; int y1; asm volatile( "mov %[y1], %[f], lsr #12 \n" "eor %[f], %[f], %[y1], lsl #12 \n" "add %[y1], %[y0], %[y1], lsl #1 \n" "ldrsh %[y0], [%[y1], #2] \n" "ldrsh %[y1], [%[y1], #4] \n" "sub %[y1], %[y1], %[y0] \n" "mul %[f], %[y1], %[f] \n" "add %[y0], %[y0], %[f], asr #12 \n" : [f]"+r"(position), [y0]"+r"(output), [y1]"=&r"(y1)); return output; } #define SPC_LINEAR_AMP static inline int linear_amp( struct voice_t* voice, int output, int* amp_0, int* amp_1 ) { int t0; asm volatile( "mul %[t0], %[out], %[envx]" : [t0]"=&r"(t0) : [out]"r"(output), [envx]"r"(voice->envx)); asm volatile( "mov %[t0], %[t0], asr #11 \n" "mul %[a1], %[t0], %[v1] \n" "mul %[a0], %[t0], %[v0] \n" : [t0]"+r"(t0), [a0]"=&r"(*amp_0), [a1]"=&r"(*amp_1) : [v0]"r"((int) voice->volume [0]), [v1]"r"((int) voice->volume [1])); return t0; } #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 ) { int t0 = GET_LE16SA( echo_ptr ); int t1 = GET_LE16SA( echo_ptr + 2 ); /* Keep last 8 samples */ int32_t *fir_ptr; asm volatile ( "add %[p], %[t_p], #8 \n" "bic %[t_p], %[p], %[mask] \n" "str %[t0], [%[p], #-8] \n" "str %[t1], [%[p], #-4] \n" /* duplicate at +8 eliminates wrap checking below */ "str %[t0], [%[p], #56] \n" "str %[t1], [%[p], #60] \n" : [p]"=&r"(fir_ptr), [t_p]"+r"(this->fir.ptr) : [t0]"r"(t0), [t1]"r"(t1), [mask]"i"(~FIR_BUF_MASK)); int32_t *fir_coeff = this->fir.coeff; asm volatile ( "ldmia %[c]!, { r0-r1 } \n" "ldmia %[p]!, { r4-r5 } \n" "mul %[acc0], r0, %[acc0] \n" "mul %[acc1], r0, %[acc1] \n" "mla %[acc0], r4, r1, %[acc0] \n" "mla %[acc1], r5, r1, %[acc1] \n" "ldmia %[c]!, { r0-r1 } \n" "ldmia %[p]!, { r2-r5 } \n" "mla %[acc0], r2, r0, %[acc0] \n" "mla %[acc1], r3, r0, %[acc1] \n" "mla %[acc0], r4, r1, %[acc0] \n" "mla %[acc1], r5, r1, %[acc1] \n" "ldmia %[c]!, { r0-r1 } \n" "ldmia %[p]!, { r2-r5 } \n" "mla %[acc0], r2, r0, %[acc0] \n" "mla %[acc1], r3, r0, %[acc1] \n" "mla %[acc0], r4, r1, %[acc0] \n" "mla %[acc1], r5, r1, %[acc1] \n" "ldmia %[c]!, { r0-r1 } \n" "ldmia %[p]!, { r2-r5 } \n" "mla %[acc0], r2, r0, %[acc0] \n" "mla %[acc1], r3, r0, %[acc1] \n" "mla %[acc0], r4, r1, %[acc0] \n" "mla %[acc1], r5, r1, %[acc1] \n" : [acc0]"+r"(t0), [acc1]"+r"(t1), [p]"+r"(fir_ptr), [c]"+r"(fir_coeff) : : "r0", "r1", "r2", "r3", "r4", "r5"); *out_0 = t0; *out_1 = t1; } #endif /* SPC_NOECHO */