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-rw-r--r--gnu/packages/multiprecision.scm40
1 files changed, 40 insertions, 0 deletions
diff --git a/gnu/packages/multiprecision.scm b/gnu/packages/multiprecision.scm
index 3107bbb979..6fc58ccff1 100644
--- a/gnu/packages/multiprecision.scm
+++ b/gnu/packages/multiprecision.scm
@@ -5,6 +5,7 @@
;;; Copyright © 2016 Nicolas Goaziou <mail@nicolasgoaziou.fr>
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2018 Eric Bavier <bavier@member.fsf.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -25,6 +26,7 @@
#:use-module (guix licenses)
#:use-module (gnu packages)
#:use-module (gnu packages m4)
+ #:use-module (gnu packages gcc)
#:use-module (guix packages)
#:use-module (guix download)
#:use-module (guix utils)
@@ -157,3 +159,41 @@ are both guaranteed, thanks to interval computation, and accurate, thanks to
multiple-precision arithmetic.")
(license lgpl2.1+)
(home-page "https://perso.ens-lyon.fr/nathalie.revol/software.html")))
+
+(define-public qd
+ (package
+ (name "qd")
+ (version "2.3.18")
+ (source (origin
+ (method url-fetch)
+ (uri (string-append "http://crd.lbl.gov/~dhbailey/mpdist/qd-"
+ version ".tar.gz"))
+ (sha256
+ (base32
+ "0vkihcj9fyv2cycq8515713gbs3yskhmivy8bznvx72i6ddnn2c1"))))
+ (build-system gnu-build-system)
+ (native-inputs
+ `(("gfortran" ,gfortran)))
+ (arguments
+ `(#:configure-flags `("--disable-enable_fma" ;weird :/
+ "--enable-shared"
+ ,,@(if (string-prefix? "aarch64"
+ (or (%current-target-system)
+ (%current-system)))
+ ;; XXX: The qd_test test fails numerical
+ ;; accuracy checks for 'dd_real::exp()' on
+ ;; aarch64 with GCC 5.4 at -O2. Disabling
+ ;; expensive optimizations lets it pass.
+ '("CXXFLAGS=-O3 -fno-expensive-optimizations")
+ '("CXXFLAGS=-O3")))))
+ (home-page "http://crd-legacy.lbl.gov/~dhbailey/mpdist/")
+ (synopsis "Double-double and quad-double library")
+ (description "This package supports both a double-double
+datatype (approx. 32 decimal digits) and a quad-double datatype (approx. 64
+decimal digits). The computational library is written in C++. Both C++ and
+Fortran-90 high-level language interfaces are provided to permit one to
+convert an existing C++ or Fortran-90 program to use the library with only
+minor changes to the source code. In most cases only a few type statements
+and (for Fortran-90 programs) read/write statements need to be changed. PSLQ
+and numerical quadrature programs are included.")
+ (license bsd-3)))