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get_daz and get_ftz for inspecting settings #7

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get_daz and get_ftz for inspecting settings #7

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2 changes: 2 additions & 0 deletions daz/__init__.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
from daz._core import set_daz # NOQA
from daz._core import set_ftz # NOQA
from daz._core import get_daz # NOQA
from daz._core import get_ftz # NOQA
from daz._core import unset_daz # NOQA
from daz._core import unset_ftz # NOQA
from daz._version import __version__ # NOQA
18 changes: 18 additions & 0 deletions daz/_core.c
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,22 @@ static PyObject* set_ftz(void)
return Py_None;
}

static PyObject* get_daz(void)
{
unsigned int mxcsr = _mm_getcsr();
if((1<<6)&mxcsr)
Py_RETURN_TRUE;
Py_RETURN_FALSE;
}

static PyObject* get_ftz(void)
{
unsigned int mxcsr = _mm_getcsr();
if((1<<15)&mxcsr)
Py_RETURN_TRUE;
Py_RETURN_FALSE;
}

static PyObject* unset_daz(void)
{
unsigned int mxcsr = _mm_getcsr();
Expand All @@ -40,6 +56,8 @@ static PyObject* unset_ftz(void)
static PyMethodDef methods[] = {
{"set_ftz", (PyCFunction)set_ftz, METH_NOARGS, 0},
{"set_daz", (PyCFunction)set_daz, METH_NOARGS, 0},
{"get_ftz", (PyCFunction)get_ftz, METH_NOARGS, 0},
{"get_daz", (PyCFunction)get_daz, METH_NOARGS, 0},
{"unset_ftz", (PyCFunction)unset_ftz, METH_NOARGS, 0},
{"unset_daz", (PyCFunction)unset_daz, METH_NOARGS, 0},
{NULL, NULL, 0, NULL}
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6 changes: 6 additions & 0 deletions tests/test_daz.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,12 +16,16 @@ def setUp(self):
def check_normal(self):
assert self.normal == self.denormal * self.scale
assert self.normal / self.scale == self.denormal
assert not daz.get_daz()
assert not daz.get_ftz()

def test_normal(self):
self.check_normal()

def test_daz(self):
daz.set_daz()
assert daz.get_daz()
assert not daz.get_ftz()
assert self.normal / self.scale == 0
assert self.denormal * self.scale == 0
assert self.denormal == 0
Expand All @@ -30,6 +34,8 @@ def test_daz(self):

def test_ftz(self):
daz.set_ftz()
assert daz.get_ftz()
assert not daz.get_daz()
assert self.normal / self.scale == 0
assert self.denormal * self.scale == self.normal
assert self.denormal != 0
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