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/*
* absgn~: combined absolute value and sign of a signal
*
* (c) 1999-2011 IOhannes m zmölnig, forum::für::umläute, institute of electronic music and acoustics (iem)
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "zexySIMD.h"
typedef struct _absgn
{
t_object x_obj;
t_float x_f;
} t_absgn;
/* ------------------------ sigABSGN~ ----------------------------- */
static t_class *sigABSGN_class;
static t_int *sigABSGN_perform(t_int *w)
{
t_sample *in = (t_sample *)(w[1]);
t_sample *out = (t_sample *)(w[2]);
t_sample *out2 = (t_sample *)(w[3]);
int n = (int)(w[4]);
while (n--)
{
t_sample val = *in++;
*out++ = fabsf(val);
if (val>0.) *out2++=1.;
else if (val<0.) *out2++=-1.;
else *out2++=0.;
}
return (w+5);
}
#ifdef __SSE__
static int l_bitmask[] ={0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
static int l_sgnbitmask[]={0x80000000, 0x80000000, 0x80000000, 0x80000000};
static t_int *sigABSGN_performSSE(t_int *w)
{
__m128 *in = (__m128 *)(w[1]);
__m128 *out1 = (__m128 *)(w[2]);
__m128 *out2 = (__m128 *)(w[3]);
int n = (int)(w[4])>>3;
const __m128 bitmask= _mm_loadu_ps((float*)l_bitmask);
const __m128 sgnmask= _mm_loadu_ps((float*)l_sgnbitmask);
const __m128 zero = _mm_setzero_ps();
const __m128 one = _mm_set1_ps(1.f);
do {
__m128 val, val2, xmm0, xmm1, xmm2, xmm3;
val=in[0];
xmm0 = _mm_cmpneq_ps(val, zero); /* mask for non-zeros */
xmm1 = _mm_and_ps (val, sgnmask);/* sign (without value) */
xmm0 = _mm_and_ps (xmm0, one); /* (abs) value: (val==0.f)?0.f:1.f */
out1[0]= _mm_and_ps (val, bitmask);/* abs: set sign-bit to "+" */
out2[0]= _mm_or_ps (xmm1, xmm0); /* merge sign and value */
val2=in[1];
xmm2 = _mm_cmpneq_ps(val2, zero); /* mask for non-zeros */
xmm3 = _mm_and_ps (val2, sgnmask);/* sign (without value) */
xmm2 = _mm_and_ps (xmm2, one); /* (abs) value: (val==0.f)?0.f:1.f */
out1[1]= _mm_and_ps (val2, bitmask);/* abs: set sign-bit to "+" */
out2[1]= _mm_or_ps (xmm3, xmm2); /* merge sign and value */
in +=2;
out1+=2;
out2+=2;
}
while (--n);
return (w+5);
}
#endif /* __SSE__ */
static void sigABSGN_dsp(t_absgn *x, t_signal **sp)
{
ZEXY_USEVAR(x);
#ifdef __SSE__
if(
ZEXY_TYPE_EQUAL(t_sample, float) && /* currently SSE2 code is only for float (not for double) */
Z_SIMD_CHKBLOCKSIZE(sp[0]->s_n) &&
Z_SIMD_CHKALIGN(sp[0]->s_vec) &&
Z_SIMD_CHKALIGN(sp[1]->s_vec) &&
Z_SIMD_CHKALIGN(sp[2]->s_vec) &&
zexy_testSSE(sigABSGN_perform, sigABSGN_performSSE, 1, 2)
)
{
dsp_add(sigABSGN_performSSE, 4, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
} else
#endif
{
dsp_add(sigABSGN_perform, 4, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
}
}
static void sigABSGN_helper(void)
{
post("\n%c absgn~ \t\t:: absolute value and sign of a signal", HEARTSYMBOL);
post(" \t\t copyright (c) Tim Blechmann 2006");
}
static void *sigABSGN_new(void)
{
t_absgn *x = (t_absgn *)pd_new(sigABSGN_class);
x->x_f=0.f;
outlet_new(&x->x_obj, gensym("signal"));
outlet_new(&x->x_obj, gensym("signal"));
return (x);
}
void absgn_tilde_setup(void)
{
sigABSGN_class = class_new(gensym("absgn~"), (t_newmethod)sigABSGN_new, 0,
sizeof(t_absgn), 0, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(sigABSGN_class, t_absgn, x_f);
class_addmethod(sigABSGN_class, (t_method)sigABSGN_dsp, gensym("dsp"), 0);
class_addmethod(sigABSGN_class, (t_method)sigABSGN_helper, gensym("help"), 0);
class_sethelpsymbol(sigABSGN_class, gensym("zigbinops"));
zexy_register("absgn~");
}
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