From 4578df64e4c923d1c3edf1213a209500e7caf453 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dan=20Hor=C3=A1k?= <dan@danny.cz>
Date: Tue, 14 Jun 2022 17:03:35 +0000
Subject: [PATCH] fix build after migration to IEEE 128-bit long double on
 ppc64le

---
 h5py-3.7.0-ppc-float128.patch | 23 +++++++++++++++++++++++
 h5py.spec                     |  5 +++++
 2 files changed, 28 insertions(+)
 create mode 100644 h5py-3.7.0-ppc-float128.patch

diff --git a/h5py-3.7.0-ppc-float128.patch b/h5py-3.7.0-ppc-float128.patch
new file mode 100644
index 0000000..71dbd80
--- /dev/null
+++ b/h5py-3.7.0-ppc-float128.patch
@@ -0,0 +1,23 @@
+diff -up h5py-3.7.0/h5py/h5t.pyx.orig h5py-3.7.0/h5py/h5t.pyx
+--- h5py-3.7.0/h5py/h5t.pyx.orig	2022-06-14 16:31:22.964458579 +0000
++++ h5py-3.7.0/h5py/h5t.pyx	2022-06-14 16:31:46.404768118 +0000
+@@ -282,18 +282,7 @@ cdef (int, int, int) _correct_float_info
+     nmant = finfo.nmant
+     maxexp = finfo.maxexp
+     minexp = finfo.minexp
+-    # workaround for numpy's buggy finfo on float128 on ppc64 archs
+-    if ftype_ == np.longdouble and MACHINE == 'ppc64':
+-        # values reported by hdf5
+-        nmant = 116
+-        maxexp = 1024
+-        minexp = -1022
+-    elif ftype_ == np.longdouble and MACHINE == 'ppc64le':
+-        # values reported by hdf5
+-        nmant = 52
+-        maxexp = 1024
+-        minexp = -1022
+-    elif nmant == 63 and finfo.nexp == 15:
++    if nmant == 63 and finfo.nexp == 15:
+         # This is an 80-bit float, correct mantissa size
+         nmant += 1
+ 
diff --git a/h5py.spec b/h5py.spec
index 0e34fc7..fba0d51 100644
--- a/h5py.spec
+++ b/h5py.spec
@@ -8,6 +8,10 @@ Release:        2%{?dist}
 License:        BSD
 URL:            http://www.h5py.org/
 Source0:        https://files.pythonhosted.org/packages/source/h/h5py/h5py-%{version}.tar.gz
+# drop the unnecessary workaround for float128 type after
+# https://fedoraproject.org/wiki/Changes/PPC64LE_Float128_Transition
+# in F-36
+Patch0:         h5py-3.7.0-ppc-float128.patch
 BuildRequires:  gcc
 BuildRequires:  hdf5-devel
 BuildRequires:  liblzf-devel
@@ -76,6 +80,7 @@ Requires:       mpich
 
 %prep
 %setup -q -c -n %{name}-%{version}
+%patch0
 mv %{name}-%{version} serial
 cd serial
 %{__python3} api_gen.py