Author: Maciej Fijalkowski <fij...@gmail.com>
Branch: missing-ndarray-attributes
Changeset: r58576:49ce76217456
Date: 2012-10-29 12:03 +0100
http://bitbucket.org/pypy/pypy/changeset/49ce76217456/
Log: improve singlefloat byteswap
diff --git a/pypy/rlib/rarithmetic.py b/pypy/rlib/rarithmetic.py
--- a/pypy/rlib/rarithmetic.py
+++ b/pypy/rlib/rarithmetic.py
@@ -533,6 +533,9 @@
def __ne__(self, other):
return not self.__eq__(other)
+ def __repr__(self):
+ return 'r_singlefloat(%s)' % (float(self),)
+
class r_longfloat(object):
"""A value of the C type 'long double'.
@@ -595,22 +598,22 @@
""" Convert little->big endian and the opposite
"""
from pypy.rpython.lltypesystem import lltype, rffi
- from pypy.rlib.longlong2float import longlong2float, float2longlong
+ from pypy.rlib.longlong2float import longlong2float, float2longlong,\
+ uint2singlefloat, singlefloat2uint
T = lltype.typeOf(arg)
- # XXX we cannot do arithmetics on small ints
- #if isinstance(arg, base_int):
is_float = False
is_single_float = False
if T == lltype.SingleFloat:
- T = lltype.Float
- arg = rffi.cast(T, arg)
+ T = rffi.UINT
is_single_float = True
- if T == lltype.Float:
+ arg = singlefloat2uint(arg)
+ elif T == lltype.Float:
is_float = True
T = rffi.LONGLONG
arg = float2longlong(arg)
else:
+ # we cannot do arithmetics on small ints
arg = widen(arg)
if rffi.sizeof(T) == 1:
res = arg
@@ -634,9 +637,9 @@
(f >> 24) | (g >> 40) | (h >> 56))
else:
assert False # unreachable code
+ if is_single_float:
+ return uint2singlefloat(rffi.cast(rffi.UINT, res))
if is_float:
res = rffi.cast(rffi.LONGLONG, res)
- if is_single_float:
- return rffi.cast(lltype.SingleFloat, longlong2float(res))
return longlong2float(res)
return rffi.cast(T, res)
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