From 5c669899d3ccc8a60521e6bf8268f8f59fd3babb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Thu, 5 Jan 2006 11:53:24 +0000
Subject: added [absgn~] as external (written by tim blechmann) and abstraction
 the main purpose of this external is speed

svn path=/trunk/externals/zexy/; revision=4364
---
 src/absgn~.c | 140 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 src/absgn~.c

(limited to 'src/absgn~.c')

diff --git a/src/absgn~.c b/src/absgn~.c
new file mode 100644
index 0000000..1d3d4bd
--- /dev/null
+++ b/src/absgn~.c
@@ -0,0 +1,140 @@
+/******************************************************
+ *
+ * zexy - implementation file
+ *
+ * (c) 2006 Tim Blechmann
+ *
+ *
+ ******************************************************
+ *
+ * license: GNU General Public License v.2
+ *
+ ******************************************************/
+
+#include "zexy.h"
+
+typedef struct _absgn
+{
+  t_object x_obj;
+  float x_f;
+} t_absgn;
+
+
+/* ------------------------ sigABSGN~ ----------------------------- */
+
+static t_class *sigABSGN_class;
+
+static t_int *sigABSGN_perform(t_int *w)
+{
+  t_float *in = (t_float *)(w[1]);
+  t_float *out = (t_float *)(w[2]);
+  t_float *out2 = (t_float *)(w[3]);
+  int n = (int)(w[4]);
+  
+  while (n--)
+  {
+      t_float 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 long l_bitmask[]   ={0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
+static long 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;
+    out+=2;
+    out2+=2;
+  }
+  while (--n);
+
+  return (w+5);
+}
+#endif /* __SSE__ */
+
+static void sigABSGN_dsp(t_absgn *x, t_signal **sp)
+{
+#ifdef __SSE__
+  if(
+     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)
+     )
+    {
+      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("zexy/sigbinops+"));
+
+  zexy_register("absgn~");
+}
+
+void z_absgn__setup(void)
+{
+  absgn_tilde_setup();
+}
-- 
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