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