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from pygpu.gpuarray import GpuArrayException, UnsupportedException
from pygpu.gpuarray cimport (gpucontext, GA_NO_ERROR, get_typecode,
typecode_to_dtype, GpuContext, GpuArray,
get_exc, gpuarray_get_elsize)
from pygpu.gpuarray cimport (GA_BUFFER, GA_SIZE, GA_SSIZE, GA_ULONG, GA_LONG,
GA_UINT, GA_INT, GA_USHORT, GA_SHORT,
GA_UBYTE, GA_BYTE, GA_DOUBLE, GA_FLOAT)
from libc.string cimport memset, memcpy, strdup
from libc.stdlib cimport malloc, calloc, free
cdef bytes to_bytes(s):
if isinstance(s, bytes):
return <bytes>s
if isinstance(s, unicode):
return <bytes>(<unicode>s).encode('ascii')
raise TypeError("Can't convert to bytes")
cdef extern from "gpuarray/buffer.h":
ctypedef struct gpucontext:
pass
char *gpucontext_error(gpucontext *ctx, int err)
cdef extern from "gpuarray/elemwise.h":
ctypedef struct _GpuElemwise "GpuElemwise":
pass
ctypedef struct gpuelemwise_arg:
const char *name
int typecode
int flags
cdef int GE_SCALAR
cdef int GE_READ
cdef int GE_WRITE
_GpuElemwise *GpuElemwise_new(gpucontext *ctx, const char *preamble,
const char *expr, unsigned int n,
gpuelemwise_arg *args, unsigned int nd,
int flags)
void GpuElemwise_free(_GpuElemwise *ge)
int GpuElemwise_call(_GpuElemwise *ge, void **args, int flags)
cdef int GE_NOADDR64
cdef int GE_CONVERT_F16
cdef int GE_BROADCAST
cdef int GE_NOCOLLAPSE
cdef int GE_PADSHAPE
cdef class arg:
cdef gpuelemwise_arg a
def __cinit__(self):
memset(&self.a, 0, sizeof(gpuelemwise_arg))
def __init__(self, name, type, read=False, write=False, scalar=False):
# Make sure to clear previous storage
# __init__ may be called more than once
free(self.a.name)
self.a.name = strdup(to_bytes(name))
if self.a.name is NULL:
raise MemoryError
self.a.typecode = get_typecode(type)
self.a.flags = 0
if read:
self.a.flags |= GE_READ
if write:
self.a.flags |= GE_WRITE
if scalar:
self.a.flags |= GE_SCALAR
if self.a.flags == 0:
raise ValueError('no flags specified for arg %s' % (name,))
def __dealloc__(self):
free(self.a.name)
property name:
def __get__(self):
return self.a.name.decode('ascii')
property type:
def __get__(self):
return typecode_to_dtype(self.a.typecode)
property read:
def __get__(self):
return self.a.flags & GE_READ
property write:
def __get__(self):
return self.a.flags & GE_WRITE
property scalar:
def __get__(self):
return self.a.flags & GE_SCALAR
cdef class GpuElemwise:
cdef _GpuElemwise *ge
cdef int *types
cdef void **callbuf
cdef unsigned int n
def __cinit__(self, GpuContext ctx, expr, args, unsigned int nd=0,
preamble=b"", bint convert_f16=False):
cdef gpuelemwise_arg *_args;
cdef unsigned int i
cdef arg aa
self.ge = NULL
self.types = NULL
self.callbuf = NULL
preamble = to_bytes(preamble)
expr = to_bytes(expr)
self.n = len(args)
self.types = <int *>calloc(self.n, sizeof(int))
if self.types is NULL:
raise MemoryError
self.callbuf = <void **>calloc(self.n, sizeof(void *))
if self.callbuf == NULL:
raise MemoryError
_args = <gpuelemwise_arg *>calloc(self.n, sizeof(gpuelemwise_arg));
if _args is NULL:
raise MemoryError
try:
for i in range(self.n):
if not isinstance(args[i], arg):
raise TypeError("args must be an iterable of arg")
aa = <arg>args[i]
memcpy(&_args[i], &aa.a, sizeof(gpuelemwise_arg))
if aa.a.flags & GE_SCALAR:
self.types[i] = aa.a.typecode
self.callbuf[i] = malloc(gpuarray_get_elsize(aa.a.typecode))
if self.callbuf[i] is NULL:
raise MemoryError
else:
self.types[i] = GA_BUFFER
self.ge = GpuElemwise_new(ctx.ctx, preamble, expr, self.n,
_args, nd,
GE_CONVERT_F16 if convert_f16 else 0)
finally:
free(_args)
if self.ge is NULL:
error_message = gpucontext_error(ctx.ctx, 0).decode(encoding='latin-1')
# getting the error type this way is fragile, but the alternative is breaking ABI
raise (UnsupportedException if
"This device does not support double precision" in error_message else
GpuArrayException)("Could not initialize C GpuElemwise instance: " + error_message)
def __dealloc__(self):
cdef unsigned int i
if self.ge is not NULL:
GpuElemwise_free(self.ge)
self.ge = NULL
for i in range(self.n):
if self.types[i] != GA_BUFFER:
free(self.callbuf[i])
free(self.callbuf)
free(self.types)
cdef _setarg(self, unsigned int index, object o):
cdef int typecode
typecode = self.types[index]
if typecode == GA_BUFFER:
if not isinstance(o, GpuArray):
raise TypeError, "expected a GpuArray"
self.callbuf[index] = <void *>&(<GpuArray>o).ga
elif typecode == GA_SIZE:
(<size_t *>self.callbuf[index])[0] = o
elif typecode == GA_SSIZE:
(<ssize_t *>self.callbuf[index])[0] = o
elif typecode == GA_FLOAT:
(<float *>self.callbuf[index])[0] = o
elif typecode == GA_DOUBLE:
(<double *>self.callbuf[index])[0] = o
elif typecode == GA_BYTE:
(<signed char *>self.callbuf[index])[0] = o
elif typecode == GA_UBYTE:
(<unsigned char *>self.callbuf[index])[0] = o
elif typecode == GA_SHORT:
(<short *>self.callbuf[index])[0] = o
elif typecode == GA_USHORT:
(<unsigned short *>self.callbuf[index])[0] = o
elif typecode == GA_INT:
(<int *>self.callbuf[index])[0] = o
elif typecode == GA_UINT:
(<unsigned int *>self.callbuf[index])[0] = o
elif typecode == GA_LONG:
(<long *>self.callbuf[index])[0] = o
elif typecode == GA_ULONG:
(<unsigned long *>self.callbuf[index])[0] = o
else:
raise ValueError("Bad typecode in _setarg: %d "
"(please report this, it is a bug)" % (typecode,))
def __call__(self, *args, **kwargs):
cdef unsigned int i
cdef int err
cdef int flags
flags = 0
if kwargs.pop('broadcast', True):
flags |= GE_BROADCAST
if kwargs.pop('padshape', True):
flags |= GE_PADSHAPE
if len(kwargs) != 0:
raise TypeError("Unknown keyword argument: %s" % list(kwargs.keys())[0])
for i, arg in enumerate(args):
self._setarg(i, arg)
err = GpuElemwise_call(self.ge, self.callbuf, flags)
if err != GA_NO_ERROR:
raise get_exc(err)("Could not call GpuElemwise")
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