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fft.scm
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fft.scm
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;;;; fft.scm - fft benchmark, by Bradley Lucier
(cond-expand
((not chicken) ; disable in CHICKEN to test specialization in safe mode
(declare
(standard-bindings)
(extended-bindings)
(block)
(not safe)))
(else
(import (chicken bitwise)
(chicken fixnum)
(chicken flonum)
(chicken process-context))))
;;; All the following redefinitions are *ignored* by the Gambit compiler
;;; because of the declarations above.
(define-syntax defalias
(syntax-rules ()
((_ one two)
(define-syntax one
(syntax-rules ()
((_ . args) (two . args)))))))
(cond-expand
(generic
(begin
(defalias fixnum->flonum exact->inexact)
(defalias fxodd? odd?)
(defalias fxeven? even?)
(defalias fxarithmetic-shift-right fxshr)
(defalias fxarithmetic-shift-left fxshl)
(defalias fl* *)
(defalias fl/ /)
(defalias fl+ +)
(defalias fl- -)))
(chicken
(begin
(defalias fixnum->flonum exact->inexact)
(defalias fxodd? odd?)
(defalias fxeven? even?)
(defalias fxarithmetic-shift-right fxshr)
(defalias fxarithmetic-shift-left fxshl)
(defalias fl* fp*)
(defalias fl/ fp/)
(defalias fl+ fp+)
(defalias fl- fp-)))
(else))
(cond-expand
((and chicken (not unboxed))
(begin
(defalias make-f64vector make-vector)
(defalias f64vector vector)
(defalias f64vector-set! vector-set!)
(defalias f64vector-ref vector-ref)
(defalias list->f64vector list->vector)
(defalias f64vector-length vector-length)) )
(chicken
(import srfi-4))
(else) )
;;; end of *ignored* definitions
(define lut-table-size 512)
(define lut-table-size^2 262144)
(define lut-table-size^3 134217728)
(define log-lut-table-size 9)
(define low-lut
(list->f64vector '(1. 0.
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