def main(A: T.Buffer[(256, 256), "float32"],
T_softmax_norm: T.Buffer[(256, 256), "float32"]) -> None:
T_softmax_maxelem = T.alloc_buffer([256], dtype="float32")
T_softmax_expsum = T.alloc_buffer([256], dtype="float32")
for i0, i1 in T.grid(256, 256):
with T.block("T_softmax_maxelem"):
i0_1, k = T.axis.remap("SR", [i0, i1])
with T.init():
T_softmax_maxelem[i0_1] = T.min_value("float32")
T_softmax_maxelem[i0_1] = T.max(T_softmax_maxelem[i0_1],
A[i0_1, k])
for i0, i1 in T.grid(256, 256):
with T.block("T_softmax_expsum"):
i0_2, k = T.axis.remap("SR", [i0, i1])
with T.init():
T_softmax_expsum[i0_2] = T.float32(0)
T_softmax_expsum[i0_2] = T_softmax_expsum[i0_2] + T.exp(
A[i0_2, k] - T_softmax_maxelem[i0_2], dtype="float32")
for i0_3, i1 in T.grid(256, 256):
with T.block("T_softmax_norm"):
i0_4, i1_1 = T.axis.remap("SS", [i0_3, i1])
T_softmax_norm[i0_4,
i1_1] = T.exp(
A[i0_4, i1_1] - T_softmax_maxelem[i0_4],
dtype="float32") / T_softmax_expsum[i0_4]
def lowered_reducer_max(a: T.handle, b: T.handle) -> None:
A = T.match_buffer(a, [128, 128], dtype="float32")
B = T.match_buffer(b, [128], dtype="float32")
reduce_temp0 = T.alloc_buffer([1],
dtype="float32",
strides=[1],
scope="local")
for i in T.serial(0, 128):
for k in T.thread_binding(0, 128, thread="threadIdx.x"):
with T.block("B_cross_thread_reduction"):
vi, vk = T.axis.remap("SR", [i, k])
T.reads([A[vi, vk]])
T.writes([reduce_temp0[0]])
T.attr(
T.comm_reducer(lambda x, y: T.max(x, y),
[T.min_value("float32")]),
"reduce_scope",
T.reinterpret(T.uint64(0), dtype="handle"),
)
T.evaluate(
T.tvm_thread_allreduce(T.uint32(1),
A[vi, vk],
True,
reduce_temp0.data,
k,
dtype="handle"))
with T.block("B_write_back"):
vi = T.axis.spatial(128, i)
T.reads([reduce_temp0[0]])
T.writes([B[vi]])
B[vi] = reduce_temp0[0]
def softmax(var_A: T.handle, var_T_softmax_norm: T.handle) -> None:
A = T.match_buffer(var_A, [256, 256], dtype="float32")
T_softmax_norm = T.match_buffer(var_T_softmax_norm, [256, 256], dtype="float32")
T_softmax_maxelem_shared = T.alloc_buffer([256], dtype="float32", scope="shared")
T_softmax_expsum_shared = T.alloc_buffer([256], dtype="float32", scope="shared")
for i0 in T.thread_binding(0, 256, thread="blockIdx.x"):
for ax0_0 in T.serial(0, 8):
for ax0_1 in T.thread_binding(0, 32, thread="threadIdx.x"):
with T.block("T_softmax_maxelem"):
i0_1 = T.axis.spatial(256, i0)
k = T.axis.reduce(256, ax0_0 * 32 + ax0_1)
T.reads([T_softmax_maxelem_shared[i0_1], A[i0_1, k]])
T.writes([T_softmax_maxelem_shared[i0_1]])
with T.init():
T_softmax_maxelem_shared[i0_1] = T.min_value("float32")
T_softmax_maxelem_shared[i0_1] = T.max(
T_softmax_maxelem_shared[i0_1], A[i0_1, k]
)
for ax0_0 in T.serial(0, 8):
for ax0_1 in T.thread_binding(0, 32, thread="threadIdx.x"):
with T.block("T_softmax_expsum"):
i0_2 = T.axis.spatial(256, i0)
k = T.axis.reduce(256, ax0_0 * 32 + ax0_1)
T.reads(
[
T_softmax_expsum_shared[i0_2],
A[i0_2, k],
T_softmax_maxelem_shared[i0_2],
]
)
T.writes([T_softmax_expsum_shared[i0_2]])
with T.init():
T_softmax_expsum_shared[i0_2] = T.float32(0)
T_softmax_expsum_shared[i0_2] = T_softmax_expsum_shared[i0_2] + T.exp(
A[i0_2, k] - T_softmax_maxelem_shared[i0_2], dtype="float32"
)
for i1_0 in T.serial(0, 8):
for i1_1 in T.thread_binding(0, 32, thread="threadIdx.x"):
with T.block("T_softmax_norm"):
i0_3 = T.axis.spatial(256, i0)
i1 = T.axis.spatial(256, i1_0 * 32 + i1_1)
T.reads(
[
A[i0_3, i1],
T_softmax_maxelem_shared[i0_3],
T_softmax_expsum_shared[i0_3],
]
)
T.writes([T_softmax_norm[i0_3, i1]])
T.block_attr({"axis": 1})
T_softmax_norm[i0_3, i1] = (
T.exp(
A[i0_3, i1] - T_softmax_maxelem_shared[i0_3],
dtype="float32",
)
/ T_softmax_expsum_shared[i0_3]
)
def reducer_max(a: T.handle, b: T.handle) -> None:
A = T.match_buffer(a, [128, 128], dtype="float32")
B = T.match_buffer(b, [128], dtype="float32")
for i in T.serial(0, 128):
for k in T.thread_binding(0, 128, thread="threadIdx.x"):
with T.block("B"):
vi, vk = T.axis.remap("SR", [i, k])
T.reads([B[vi], A[vi, vk]])
T.writes([B[vi]])
with T.init():
B[vi] = T.min_value("float32")
B[vi] = T.max(B[vi], A[vi, vk])
def tir_argmax_val_idx(
var_val: T.handle, var_idx: T.handle, var_argmax_v0: T.handle, var_argmax_v1: T.handle
) -> None:
T.func_attr({"global_symbol": "main", "tir.noalias": True})
m = T.var("int32")
n = T.var("int32")
val = T.match_buffer(var_val, [m, n], dtype="float32")
idx = T.match_buffer(var_idx, [m, n], dtype="int32")
argmax_v0 = T.match_buffer(var_argmax_v0, [m], dtype="float32")
argmax_v1 = T.match_buffer(var_argmax_v1, [m], dtype="int32")
for i0, i1 in T.grid(m, n):
with T.block("argmax"):
i, k = T.axis.remap("SR", [i0, i1])
T.reads(val[i, k], idx[i, k])
T.writes(argmax_v0[i], argmax_v1[i])
with T.init():
argmax_v0[i] = T.min_value("float32")
argmax_v1[i] = T.int32(-1)
v_argmax_v0: T.float32 = T.Select(argmax_v0[i] >= val[i, k], argmax_v0[i], val[i, k])
v_argmax_v1: T.int32 = T.Select(argmax_v0[i] >= val[i, k], argmax_v1[i], idx[i, k])
argmax_v0[i] = v_argmax_v0
argmax_v1[i] = v_argmax_v1
def lowered_softmax(var_A: T.handle, var_T_softmax_norm: T.handle) -> None:
A = T.match_buffer(var_A, [256, 256], dtype="float32")
T_softmax_norm = T.match_buffer(var_T_softmax_norm, [256, 256],
dtype="float32")
T_softmax_maxelem_shared = T.alloc_buffer([256],
dtype="float32",
scope="shared")
T_softmax_expsum_shared = T.alloc_buffer([256],
dtype="float32",
scope="shared")
reduce_temp0 = T.alloc_buffer([1],
dtype="float32",
strides=[1],
scope="local")
normal_reduce_temp0 = T.alloc_buffer([1],
dtype="float32",
strides=[1],
scope="local")
reduce_temp1 = T.alloc_buffer([1],
dtype="float32",
strides=[1],
scope="local")
normal_reduce_temp1 = T.alloc_buffer([1],
dtype="float32",
strides=[1],
scope="local")
for i0 in T.thread_binding(0, 256, thread="blockIdx.x"):
for ax0_1 in T.thread_binding(0, 32, thread="threadIdx.x"):
with T.block("T_softmax_maxelem_normal_reduction_init"):
T.reads([])
T.writes([normal_reduce_temp0[0]])
normal_reduce_temp0[0] = T.min_value("float32")
for ax0_0 in T.serial(0, 8):
with T.block("T_softmax_maxelem_normal_reduction"):
i0_1 = T.axis.spatial(256, i0)
k = T.axis.reduce(256, ax0_0 * 32 + ax0_1)
T.reads([A[i0_1, k], normal_reduce_temp0[0]])
T.writes([normal_reduce_temp0[0]])
normal_reduce_temp0[0] = T.max(normal_reduce_temp0[0],
A[i0_1, k])
with T.block("T_softmax_maxelem_cross_thread_reduction"):
T.reads([normal_reduce_temp0[0]])
T.writes([reduce_temp0[0]])
T.attr(
T.comm_reducer(lambda x, y: T.max(x, y),
[T.min_value("float32")]),
"reduce_scope",
T.reinterpret(T.uint64(0), dtype="handle"),
)
T.evaluate(
T.tvm_thread_allreduce(
T.uint32(1),
normal_reduce_temp0[0],
True,
reduce_temp0.data,
ax0_1,
dtype="handle",
))
with T.block("T_softmax_maxelem_write_back"):
i0_2 = T.axis.spatial(256, i0)
T.reads([reduce_temp0[0]])
T.writes([T_softmax_maxelem_shared[i0_2]])
T_softmax_maxelem_shared[i0_2] = reduce_temp0[0]
for ax0_1 in T.thread_binding(0, 32, thread="threadIdx.x"):
with T.block("T_softmax_expsum_normal_reduction_init"):
T.reads([])
T.writes([normal_reduce_temp1[0]])
normal_reduce_temp1[0] = T.float32(0)
for ax0_0 in T.serial(0, 8):
with T.block("T_softmax_expsum_normal_reduction"):
i0_3 = T.axis.spatial(256, i0)
k = T.axis.reduce(256, ax0_0 * 32 + ax0_1)
T.reads([
A[i0_3, k],
T_softmax_maxelem_shared[i0_3],
normal_reduce_temp1[0],
])
T.writes([normal_reduce_temp1[0]])
normal_reduce_temp1[0] = normal_reduce_temp1[0] + T.exp(
A[i0_3, k] - T_softmax_maxelem_shared[i0_3],
dtype="float32")
with T.block("T_softmax_expsum_cross_thread_reduction"):
T.reads([normal_reduce_temp1[0]])
T.writes([reduce_temp1[0]])
T.attr(
T.comm_reducer(lambda x_1, y_1: x_1 + y_1, [T.float32(0)]),
"reduce_scope",
T.reinterpret(T.uint64(0), dtype="handle"),
)
T.evaluate(
T.tvm_thread_allreduce(
T.uint32(1),
normal_reduce_temp1[0],
True,
reduce_temp1.data,
ax0_1,
dtype="handle",
))
with T.block("T_softmax_expsum_write_back"):
i0_4 = T.axis.spatial(256, i0)
T.reads([reduce_temp1[0]])
T.writes([T_softmax_expsum_shared[i0_4]])
T_softmax_expsum_shared[i0_4] = reduce_temp1[0]
for i1_0 in T.serial(0, 8):
for i1_1 in T.thread_binding(0, 32, thread="threadIdx.x"):
with T.block("T_softmax_norm"):
i0_5 = T.axis.spatial(256, i0)
i1 = T.axis.spatial(256, i1_0 * 32 + i1_1)
T.reads([
A[i0_5, i1],
T_softmax_maxelem_shared[i0_5],
T_softmax_expsum_shared[i0_5],
])
T.writes([T_softmax_norm[i0_5, i1]])
T.block_attr({"axis": 1})
T_softmax_norm[i0_5, i1] = (T.exp(
A[i0_5, i1] - T_softmax_maxelem_shared[i0_5],
dtype="float32",
) / T_softmax_expsum_shared[i0_5])
