/
nvvmutils.py
235 lines (172 loc) · 8.1 KB
/
nvvmutils.py
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import itertools
from llvmlite import ir
from numba.core import cgutils, targetconfig
from .cudadrv import nvvm
def declare_atomic_cas_int(lmod, isize):
fname = '___numba_atomic_i' + str(isize) + '_cas_hack'
fnty = ir.FunctionType(ir.IntType(isize),
(ir.PointerType(ir.IntType(isize)),
ir.IntType(isize),
ir.IntType(isize)))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def atomic_cmpxchg(builder, lmod, isize, ptr, cmp, val):
out = builder.cmpxchg(ptr, cmp, val, 'monotonic', 'monotonic')
return builder.extract_value(out, 0)
def declare_atomic_add_float32(lmod):
fname = 'llvm.nvvm.atomic.load.add.f32.p0f32'
fnty = ir.FunctionType(ir.FloatType(),
(ir.PointerType(ir.FloatType(), 0), ir.FloatType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_add_float64(lmod):
flags = targetconfig.ConfigStack().top()
if flags.compute_capability >= (6, 0):
fname = 'llvm.nvvm.atomic.load.add.f64.p0f64'
else:
fname = '___numba_atomic_double_add'
fnty = ir.FunctionType(ir.DoubleType(),
(ir.PointerType(ir.DoubleType()), ir.DoubleType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_sub_float32(lmod):
fname = '___numba_atomic_float_sub'
fnty = ir.FunctionType(ir.FloatType(),
(ir.PointerType(ir.FloatType()), ir.FloatType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_sub_float64(lmod):
fname = '___numba_atomic_double_sub'
fnty = ir.FunctionType(ir.DoubleType(),
(ir.PointerType(ir.DoubleType()), ir.DoubleType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_inc_int32(lmod):
fname = 'llvm.nvvm.atomic.load.inc.32.p0i32'
fnty = ir.FunctionType(ir.IntType(32),
(ir.PointerType(ir.IntType(32)), ir.IntType(32)))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_inc_int64(lmod):
fname = '___numba_atomic_u64_inc'
fnty = ir.FunctionType(ir.IntType(64),
(ir.PointerType(ir.IntType(64)), ir.IntType(64)))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_dec_int32(lmod):
fname = 'llvm.nvvm.atomic.load.dec.32.p0i32'
fnty = ir.FunctionType(ir.IntType(32),
(ir.PointerType(ir.IntType(32)), ir.IntType(32)))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_dec_int64(lmod):
fname = '___numba_atomic_u64_dec'
fnty = ir.FunctionType(ir.IntType(64),
(ir.PointerType(ir.IntType(64)), ir.IntType(64)))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_max_float32(lmod):
fname = '___numba_atomic_float_max'
fnty = ir.FunctionType(ir.FloatType(),
(ir.PointerType(ir.FloatType()), ir.FloatType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_max_float64(lmod):
fname = '___numba_atomic_double_max'
fnty = ir.FunctionType(ir.DoubleType(),
(ir.PointerType(ir.DoubleType()), ir.DoubleType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_min_float32(lmod):
fname = '___numba_atomic_float_min'
fnty = ir.FunctionType(ir.FloatType(),
(ir.PointerType(ir.FloatType()), ir.FloatType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_min_float64(lmod):
fname = '___numba_atomic_double_min'
fnty = ir.FunctionType(ir.DoubleType(),
(ir.PointerType(ir.DoubleType()), ir.DoubleType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_nanmax_float32(lmod):
fname = '___numba_atomic_float_nanmax'
fnty = ir.FunctionType(ir.FloatType(),
(ir.PointerType(ir.FloatType()), ir.FloatType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_nanmax_float64(lmod):
fname = '___numba_atomic_double_nanmax'
fnty = ir.FunctionType(ir.DoubleType(),
(ir.PointerType(ir.DoubleType()), ir.DoubleType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_nanmin_float32(lmod):
fname = '___numba_atomic_float_nanmin'
fnty = ir.FunctionType(ir.FloatType(),
(ir.PointerType(ir.FloatType()), ir.FloatType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_atomic_nanmin_float64(lmod):
fname = '___numba_atomic_double_nanmin'
fnty = ir.FunctionType(ir.DoubleType(),
(ir.PointerType(ir.DoubleType()), ir.DoubleType()))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_cudaCGGetIntrinsicHandle(lmod):
fname = 'cudaCGGetIntrinsicHandle'
fnty = ir.FunctionType(ir.IntType(64),
(ir.IntType(32),))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_cudaCGSynchronize(lmod):
fname = 'cudaCGSynchronize'
fnty = ir.FunctionType(ir.IntType(32),
(ir.IntType(64), ir.IntType(32)))
return cgutils.get_or_insert_function(lmod, fnty, fname)
def declare_string(builder, value):
lmod = builder.basic_block.function.module
cval = cgutils.make_bytearray(value.encode("utf-8") + b"\x00")
gl = cgutils.add_global_variable(lmod, cval.type, name="_str",
addrspace=nvvm.ADDRSPACE_CONSTANT)
gl.linkage = 'internal'
gl.global_constant = True
gl.initializer = cval
return builder.addrspacecast(gl, ir.PointerType(ir.IntType(8)), 'generic')
def declare_vprint(lmod):
voidptrty = ir.PointerType(ir.IntType(8))
# NOTE: the second argument to vprintf() points to the variable-length
# array of arguments (after the format)
vprintfty = ir.FunctionType(ir.IntType(32), [voidptrty, voidptrty])
vprintf = cgutils.get_or_insert_function(lmod, vprintfty, "vprintf")
return vprintf
# -----------------------------------------------------------------------------
SREG_MAPPING = {
'tid.x': 'llvm.nvvm.read.ptx.sreg.tid.x',
'tid.y': 'llvm.nvvm.read.ptx.sreg.tid.y',
'tid.z': 'llvm.nvvm.read.ptx.sreg.tid.z',
'ntid.x': 'llvm.nvvm.read.ptx.sreg.ntid.x',
'ntid.y': 'llvm.nvvm.read.ptx.sreg.ntid.y',
'ntid.z': 'llvm.nvvm.read.ptx.sreg.ntid.z',
'ctaid.x': 'llvm.nvvm.read.ptx.sreg.ctaid.x',
'ctaid.y': 'llvm.nvvm.read.ptx.sreg.ctaid.y',
'ctaid.z': 'llvm.nvvm.read.ptx.sreg.ctaid.z',
'nctaid.x': 'llvm.nvvm.read.ptx.sreg.nctaid.x',
'nctaid.y': 'llvm.nvvm.read.ptx.sreg.nctaid.y',
'nctaid.z': 'llvm.nvvm.read.ptx.sreg.nctaid.z',
'warpsize': 'llvm.nvvm.read.ptx.sreg.warpsize',
'laneid': 'llvm.nvvm.read.ptx.sreg.laneid',
}
def call_sreg(builder, name):
module = builder.module
fnty = ir.FunctionType(ir.IntType(32), ())
fn = cgutils.get_or_insert_function(module, fnty, SREG_MAPPING[name])
return builder.call(fn, ())
class SRegBuilder(object):
def __init__(self, builder):
self.builder = builder
def tid(self, xyz):
return call_sreg(self.builder, 'tid.%s' % xyz)
def ctaid(self, xyz):
return call_sreg(self.builder, 'ctaid.%s' % xyz)
def ntid(self, xyz):
return call_sreg(self.builder, 'ntid.%s' % xyz)
def nctaid(self, xyz):
return call_sreg(self.builder, 'nctaid.%s' % xyz)
def getdim(self, xyz):
i64 = ir.IntType(64)
tid = self.builder.sext(self.tid(xyz), i64)
ntid = self.builder.sext(self.ntid(xyz), i64)
nctaid = self.builder.sext(self.ctaid(xyz), i64)
res = self.builder.add(self.builder.mul(ntid, nctaid), tid)
return res
def get_global_id(builder, dim):
sreg = SRegBuilder(builder)
it = (sreg.getdim(xyz) for xyz in 'xyz')
seq = list(itertools.islice(it, None, dim))
if dim == 1:
return seq[0]
else:
return seq