def primitiveAt(interp, s_frame, words, index0):
uintword = rffi.cast(rffi.UINT, words[index0])
singlefloat = uint2singlefloat(uintword)
doublefloat = rffi.cast(rffi.DOUBLE, singlefloat)
try:
return interp.space.wrap_float(float(doublefloat))
except IndexError:
raise PrimitiveFailedError
def primitiveAt(interp, s_frame, words, index0):
uintword = rffi.cast(rffi.UINT, words[index0])
singlefloat = uint2singlefloat(uintword)
doublefloat = rffi.cast(rffi.DOUBLE, singlefloat)
try:
return interp.space.wrap_float(float(doublefloat))
except IndexError:
raise PrimitiveFailedError
def bits2float(bits):
# This is a bit convoluted, but this is much faster than ieee.pack
# stuff. In addition to normal casting through uint2singlefloat, we have
# additional casting because integer and float types that we can do
# arithmetic operations on are standard Python sizes (native machine
# size). Here's the typing going on below:
# Python Int (64-bit) -> r_uint32 -> r_singlefloat -> Python Float (64-bit)
flt = rffi.cast(lltype.Float, uint2singlefloat(r_uint32(bits)))
return flt
def bits2float(bits):
# This is a bit convoluted, but this is much faster than ieee.pack
# stuff. In addition to normal casting through uint2singlefloat, we have
# additional casting because integer and float types that we can do
# arithmetic operations on are standard Python sizes (native machine
# size). Here's the typing going on below:
# Python Int (64-bit) -> r_uint32 -> r_singlefloat -> Python Float (64-bit)
flt = rffi.cast(lltype.Float, uint2singlefloat(r_uint32(bits)))
return flt
def byteswap(arg):
""" Convert little->big endian and the opposite
"""
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rlib.longlong2float import longlong2float, float2longlong,\
uint2singlefloat, singlefloat2uint
T = lltype.typeOf(arg)
if T == lltype.SingleFloat:
arg = singlefloat2uint(arg)
elif T == lltype.Float:
arg = float2longlong(arg)
elif T == lltype.LongFloat:
assert False
else:
# we cannot do arithmetics on small ints
arg = widen(arg)
if rffi.sizeof(T) == 1:
res = arg
elif rffi.sizeof(T) == 2:
a, b = arg & 0xFF, arg & 0xFF00
res = (a << 8) | (b >> 8)
elif rffi.sizeof(T) == 4:
FF = r_uint(0xFF)
arg = r_uint(arg)
a, b, c, d = (arg & FF, arg & (FF << 8), arg & (FF << 16),
arg & (FF << 24))
res = (a << 24) | (b << 8) | (c >> 8) | (d >> 24)
elif rffi.sizeof(T) == 8:
FF = r_ulonglong(0xFF)
arg = r_ulonglong(arg)
a, b, c, d = (arg & FF, arg & (FF << 8), arg & (FF << 16),
arg & (FF << 24))
e, f, g, h = (arg & (FF << 32), arg & (FF << 40), arg & (FF << 48),
arg & (FF << 56))
res = ((a << 56) | (b << 40) | (c << 24) | (d << 8) | (e >> 8) |
(f >> 24) | (g >> 40) | (h >> 56))
else:
assert False # unreachable code
if T == lltype.SingleFloat:
return uint2singlefloat(rffi.cast(rffi.UINT, res))
if T == lltype.Float:
return longlong2float(rffi.cast(rffi.LONGLONG, res))
return rffi.cast(T, res)
def byteswap(arg):
""" Convert little->big endian and the opposite
"""
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rlib.longlong2float import longlong2float, float2longlong,\
uint2singlefloat, singlefloat2uint
T = lltype.typeOf(arg)
if T == lltype.SingleFloat:
arg = singlefloat2uint(arg)
elif T == lltype.Float:
arg = float2longlong(arg)
elif T == lltype.LongFloat:
assert False
else:
# we cannot do arithmetics on small ints
arg = widen(arg)
if rffi.sizeof(T) == 1:
res = arg
elif rffi.sizeof(T) == 2:
a, b = arg & 0xFF, arg & 0xFF00
res = (a << 8) | (b >> 8)
elif rffi.sizeof(T) == 4:
FF = r_uint(0xFF)
arg = r_uint(arg)
a, b, c, d = (arg & FF, arg & (FF << 8), arg & (FF << 16),
arg & (FF << 24))
res = (a << 24) | (b << 8) | (c >> 8) | (d >> 24)
elif rffi.sizeof(T) == 8:
FF = r_ulonglong(0xFF)
arg = r_ulonglong(arg)
a, b, c, d = (arg & FF, arg & (FF << 8), arg & (FF << 16),
arg & (FF << 24))
e, f, g, h = (arg & (FF << 32), arg & (FF << 40), arg & (FF << 48),
arg & (FF << 56))
res = ((a << 56) | (b << 40) | (c << 24) | (d << 8) | (e >> 8) |
(f >> 24) | (g >> 40) | (h >> 56))
else:
assert False # unreachable code
if T == lltype.SingleFloat:
return uint2singlefloat(rffi.cast(rffi.UINT, res))
if T == lltype.Float:
return longlong2float(rffi.cast(rffi.LONGLONG, res))
return rffi.cast(T, res)
def test_call_stubs_single_float():
from rpython.rlib.longlong2float import uint2singlefloat, singlefloat2uint
from rpython.rlib.rarithmetic import r_singlefloat, intmask
#
c0 = GcCache(False)
ARGS = [lltype.SingleFloat, lltype.SingleFloat, lltype.SingleFloat]
RES = lltype.SingleFloat
def f(a, b, c):
a = float(a)
b = float(b)
c = float(c)
x = a - (b / c)
return r_singlefloat(x)
fnptr = llhelper(lltype.Ptr(lltype.FuncType(ARGS, RES)), f)
descr2 = get_call_descr(c0, ARGS, RES)
a = intmask(singlefloat2uint(r_singlefloat(-10.0)))
b = intmask(singlefloat2uint(r_singlefloat(3.0)))
c = intmask(singlefloat2uint(r_singlefloat(2.0)))
res = descr2.call_stub_i(rffi.cast(lltype.Signed, fnptr),
[a, b, c], [], [])
assert float(uint2singlefloat(rffi.r_uint(res))) == -11.5
def test_call_stubs_single_float():
from rpython.rlib.longlong2float import uint2singlefloat, singlefloat2uint
from rpython.rlib.rarithmetic import r_singlefloat, intmask
#
c0 = GcCache(False)
ARGS = [lltype.SingleFloat, lltype.SingleFloat, lltype.SingleFloat]
RES = lltype.SingleFloat
def f(a, b, c):
a = float(a)
b = float(b)
c = float(c)
x = a - (b / c)
return r_singlefloat(x)
fnptr = llhelper(lltype.Ptr(lltype.FuncType(ARGS, RES)), f)
descr2 = get_call_descr(c0, ARGS, RES)
a = intmask(singlefloat2uint(r_singlefloat(-10.0)))
b = intmask(singlefloat2uint(r_singlefloat(3.0)))
c = intmask(singlefloat2uint(r_singlefloat(2.0)))
res = descr2.call_stub_i(rffi.cast(lltype.Signed, fnptr),
[a, b, c], [], [])
assert float(uint2singlefloat(rffi.r_uint(res))) == -11.5
def fnsingle(f1):
sf1 = r_singlefloat(f1)
ii = singlefloat2uint(sf1)
sf2 = uint2singlefloat(ii)
f2 = float(sf2)
return f2
def fnsingle(f1):
sf1 = r_singlefloat(f1)
ii = singlefloat2uint(sf1)
sf2 = uint2singlefloat(ii)
f2 = float(sf2)
return f2
def int2singlefloat(x):
x = rffi.r_uint(x)
return longlong2float.uint2singlefloat(x)
def int2singlefloat(x):
x = rffi.r_uint(x)
return longlong2float.uint2singlefloat(x)
