initial commit

Sources/PFFFTLib/simd/pf_float.h

@@ -0,0 +1,84 @@
+
+/* Copyright (c) 2013  Julien Pommier ( pommier@modartt.com )
+
+   Redistribution and use of the Software in source and binary forms,
+   with or without modification, is permitted provided that the
+   following conditions are met:
+
+   - Neither the names of NCAR's Computational and Information Systems
+   Laboratory, the University Corporation for Atmospheric Research,
+   nor the names of its sponsors or contributors may be used to
+   endorse or promote products derived from this Software without
+   specific prior written permission.
+
+   - Redistributions of source code must retain the above copyright
+   notices, this list of conditions, and the disclaimer below.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions, and the disclaimer below in the
+   documentation and/or other materials provided with the
+   distribution.
+
+   THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+   NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT
+   HOLDERS BE LIABLE FOR ANY CLAIM, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+   ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
+   SOFTWARE.
+*/
+
+#ifndef PF_FLT_H
+#define PF_FLT_H
+
+#include <assert.h>
+#include <string.h>
+#include <stdint.h>
+
+
+/*
+ *  SIMD reference material:
+ *
+ * general SIMD introduction:
+ * https://www.linuxjournal.com/content/introduction-gcc-compiler-intrinsics-vector-processing
+ *
+ * SSE 1:
+ * https://software.intel.com/sites/landingpage/IntrinsicsGuide/
+ *
+ * ARM NEON:
+ * https://developer.arm.com/architectures/instruction-sets/simd-isas/neon/intrinsics
+ *
+ * Altivec:
+ * https://www.nxp.com/docs/en/reference-manual/ALTIVECPIM.pdf
+ * https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/PowerPC-AltiVec_002fVSX-Built-in-Functions.html
+ * better one?
+ *
+ */
+
+typedef float vsfscalar;
+
+#include "pf_sse1_float.h"
+#include "pf_neon_float.h"
+#include "pf_altivec_float.h"
+
+#ifndef SIMD_SZ
+#  if !defined(PFFFT_SIMD_DISABLE)
+#    pragma message( "building float with simd disabled !" )
+#    define PFFFT_SIMD_DISABLE /* fallback to scalar code */
+#  endif
+#endif
+
+#include "pf_scalar_float.h"
+
+/* shortcuts for complex multiplcations */
+#define VCPLXMUL(ar,ai,br,bi) { v4sf tmp; tmp=VMUL(ar,bi); ar=VMUL(ar,br); ar=VSUB(ar,VMUL(ai,bi)); ai=VMUL(ai,br); ai=VADD(ai,tmp); }
+#define VCPLXMULCONJ(ar,ai,br,bi) { v4sf tmp; tmp=VMUL(ar,bi); ar=VMUL(ar,br); ar=VADD(ar,VMUL(ai,bi)); ai=VMUL(ai,br); ai=VSUB(ai,tmp); }
+#ifndef SVMUL
+/* multiply a scalar with a vector */
+#define SVMUL(f,v) VMUL(LD_PS1(f),v)
+#endif
+
+#endif /* PF_FLT_H */
+