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Try to support the matrix multiplication LLVM intrinsics

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gingerBill
2021-10-18 18:57:21 +01:00
parent ba331024af
commit 35111b39b8
1 changed files with 249 additions and 24 deletions
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273
src/llvm_backend_expr.cpp
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@@ -476,6 +476,254 @@ lbValue lb_emit_arith_array(lbProcedure *p, TokenKind op, lbValue lhs, lbValue r
}
}
bool lb_matrix_elem_simple(Type *t) {
Type *mt = base_type(t);
GB_ASSERT(mt->kind == Type_Matrix);
Type *elem = core_type(mt->Matrix.elem);
if (is_type_complex(elem)) {
return false;
}
if (is_type_different_to_arch_endianness(elem)) {
return false;
}
if (elem->kind == Type_Basic) {
switch (elem->Basic.kind) {
case Basic_f16:
case Basic_f16le:
case Basic_f16be:
// TODO(bill): determine when this is fine
return false;
}
}
return true;
}
LLVMValueRef llvm_matrix_column_major_load(lbProcedure *p, lbValue lhs) {
lbModule *m = p->module;
Type *mt = base_type(lhs.type);
GB_ASSERT(mt->kind == Type_Matrix);
GB_ASSERT(lb_matrix_elem_simple(mt));
unsigned total_elem_count = cast(unsigned)matrix_type_total_elems(mt);
Type *elem = mt->Matrix.elem;
LLVMTypeRef elem_type = lb_type(m, elem);
LLVMTypeRef vector_type = LLVMVectorType(elem_type, total_elem_count);
LLVMTypeRef types[] = {vector_type};
char const *name = "llvm.matrix.column.major.load";
unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
GB_ASSERT_MSG(id != 0, "Unable to find %s", name);
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(m->mod, id, types, gb_count_of(types));
lbValue ptr = lb_address_from_load_or_generate_local(p, lhs);
ptr = lb_emit_matrix_epi(p, ptr, 0, 0);
LLVMValueRef values[5] = {};
values[0] = ptr.value;
values[1] = lb_const_int(m, t_u64, 8*matrix_type_stride(mt)).value; // bit width
values[2] = LLVMConstNull(lb_type(m, t_llvm_bool));
values[3] = lb_const_int(m, t_u32, mt->Matrix.row_count).value;
values[4] = lb_const_int(m, t_u32, mt->Matrix.column_count).value;
return LLVMBuildCall(p->builder, ip, values, gb_count_of(values), "");
}
LLVMValueRef llvm_matrix_column_major_load_from_ptr(lbProcedure *p, lbValue ptr) {
lbModule *m = p->module;
Type *mt = base_type(type_deref(ptr.type));
GB_ASSERT(mt->kind == Type_Matrix);
GB_ASSERT(lb_matrix_elem_simple(mt));
unsigned total_elem_count = cast(unsigned)matrix_type_total_elems(mt);
Type *elem = mt->Matrix.elem;
LLVMTypeRef elem_type = lb_type(m, elem);
LLVMTypeRef vector_type = LLVMVectorType(elem_type, total_elem_count);
LLVMTypeRef types[] = {vector_type};
char const *name = "llvm.matrix.column.major.load";
unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
GB_ASSERT_MSG(id != 0, "Unable to find %s", name);
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(m->mod, id, types, gb_count_of(types));
LLVMValueRef values[5] = {};
values[0] = lb_emit_matrix_epi(p, ptr, 0, 0).value;
values[1] = lb_const_int(m, t_u64, 8*matrix_type_stride(mt)).value; // bit width
values[2] = LLVMConstNull(lb_type(m, t_llvm_bool));
values[3] = lb_const_int(m, t_u32, mt->Matrix.row_count).value;
values[4] = lb_const_int(m, t_u32, mt->Matrix.column_count).value;
return LLVMBuildCall(p->builder, ip, values, gb_count_of(values), "");
}
void llvm_matrix_column_major_store(lbProcedure *p, lbAddr addr, LLVMValueRef vector_value) {
lbModule *m = p->module;
Type *mt = base_type(lb_addr_type(addr));
GB_ASSERT(mt->kind == Type_Matrix);
GB_ASSERT(lb_matrix_elem_simple(mt));
unsigned total_elem_count = cast(unsigned)matrix_type_total_elems(mt);
Type *elem = mt->Matrix.elem;
LLVMTypeRef elem_type = lb_type(m, elem);
LLVMTypeRef vector_type = LLVMVectorType(elem_type, total_elem_count);
LLVMTypeRef types[] = {vector_type};
char const *name = "llvm.matrix.column.major.store";
unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
GB_ASSERT_MSG(id != 0, "Unable to find %s", name);
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(m->mod, id, types, gb_count_of(types));
lbValue ptr = lb_addr_get_ptr(p, addr);
ptr = lb_emit_matrix_epi(p, ptr, 0, 0);
GB_ASSERT(LLVMTypeOf(vector_value) == vector_type);
unsigned vector_size = LLVMGetVectorSize(vector_type);
GB_ASSERT((mt->Matrix.row_count*mt->Matrix.column_count) == cast(i64)vector_size);
LLVMValueRef values[6] = {};
values[0] = vector_value;
values[1] = ptr.value;
values[2] = lb_const_int(m, t_u64, 8*matrix_type_stride(mt)).value; // bit width
values[3] = LLVMConstNull(lb_type(m, t_llvm_bool));
values[4] = lb_const_int(m, t_u32, mt->Matrix.row_count).value;
values[5] = lb_const_int(m, t_u32, mt->Matrix.column_count).value;
LLVMBuildCall(p->builder, ip, values, gb_count_of(values), "");
}
void llvm_matrix_column_major_store_to_raw_ptr(lbProcedure *p, Type *mt, lbValue ptr, LLVMValueRef vector_value) {
lbModule *m = p->module;
mt = base_type(mt);
GB_ASSERT(mt->kind == Type_Matrix);
GB_ASSERT(lb_matrix_elem_simple(mt));
unsigned total_elem_count = cast(unsigned)matrix_type_total_elems(mt);
Type *elem = mt->Matrix.elem;
LLVMTypeRef elem_type = lb_type(m, elem);
LLVMTypeRef vector_type = LLVMVectorType(elem_type, total_elem_count);
LLVMTypeRef types[] = {vector_type};
char const *name = "llvm.matrix.column.major.store";
unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
GB_ASSERT_MSG(id != 0, "Unable to find %s", name);
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(m->mod, id, types, gb_count_of(types));
GB_ASSERT(LLVMTypeOf(vector_value) == vector_type);
unsigned vector_size = LLVMGetVectorSize(vector_type);
GB_ASSERT((mt->Matrix.row_count*mt->Matrix.column_count) == cast(i64)vector_size);
LLVMValueRef values[6] = {};
values[0] = vector_value;
values[1] = ptr.value;
values[2] = lb_const_int(m, t_u64, 8*matrix_type_stride(mt)).value; // bit width
values[3] = LLVMConstNull(lb_type(m, t_llvm_bool));
values[4] = lb_const_int(m, t_u32, mt->Matrix.row_count).value;
values[5] = lb_const_int(m, t_u32, mt->Matrix.column_count).value;
LLVMBuildCall(p->builder, ip, values, gb_count_of(values), "");
}
LLVMValueRef llvm_matrix_multiply(lbProcedure *p, LLVMValueRef a, LLVMValueRef b, i64 outer_rows, i64 inner, i64 outer_columns) {
lbModule *m = p->module;
LLVMTypeRef a_type = LLVMTypeOf(a);
LLVMTypeRef b_type = LLVMTypeOf(b);
GB_ASSERT(LLVMGetElementType(a_type) == LLVMGetElementType(b_type));
LLVMTypeRef elem_type = LLVMGetElementType(a_type);
LLVMTypeRef res_vector_type = LLVMVectorType(elem_type, cast(unsigned)(outer_rows*outer_columns));
LLVMTypeRef types[] = {res_vector_type, a_type, b_type};
char const *name = "llvm.matrix.multiply";
unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
GB_ASSERT_MSG(id != 0, "Unable to find %s", name);
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(m->mod, id, types, gb_count_of(types));
LLVMValueRef values[5] = {};
values[0] = a;
values[1] = b;
values[2] = lb_const_int(m, t_u32, outer_rows).value;
values[3] = lb_const_int(m, t_u32, inner).value;
values[4] = lb_const_int(m, t_u32, outer_columns).value;
return LLVMBuildCall(p->builder, ip, values, gb_count_of(values), "");
}
lbValue lb_emit_matrix_mul(lbProcedure *p, lbValue lhs, lbValue rhs, Type *type) {
Type *xt = base_type(lhs.type);
Type *yt = base_type(rhs.type);
GB_ASSERT(is_type_matrix(type));
GB_ASSERT(is_type_matrix(xt));
GB_ASSERT(is_type_matrix(yt));
GB_ASSERT(xt->Matrix.column_count == yt->Matrix.row_count);
GB_ASSERT(are_types_identical(xt->Matrix.elem, yt->Matrix.elem));
if (!lb_matrix_elem_simple(xt)) {
goto slow_form;
}
if (false) {
// TODO(bill): LLVM ERROR: Do not know how to split the result of this operator!
lbAddr res = lb_add_local_generated(p, type, true);
lbValue res_ptr = lb_addr_get_ptr(p, res);
res_ptr = lb_emit_matrix_epi(p, res_ptr, 0, 0);
lbValue lhs_ptr = lb_address_from_load_or_generate_local(p, lhs);
lbValue rhs_ptr = lb_address_from_load_or_generate_local(p, rhs);
LLVMValueRef a = llvm_matrix_column_major_load_from_ptr(p, lhs_ptr);
LLVMValueRef b = llvm_matrix_column_major_load_from_ptr(p, rhs_ptr);
LLVMValueRef c = llvm_matrix_multiply(p, a, b, xt->Matrix.row_count, xt->Matrix.column_count, yt->Matrix.column_count);
llvm_matrix_column_major_store_to_raw_ptr(p, type, res_ptr, c);
return lb_addr_load(p, res);
}
slow_form:
{
Type *elem = xt->Matrix.elem;
lbAddr res = lb_add_local_generated(p, type, true);
for (i64 i = 0; i < xt->Matrix.row_count; i++) {
for (i64 j = 0; j < yt->Matrix.column_count; j++) {
for (i64 k = 0; k < xt->Matrix.column_count; k++) {
lbValue dst = lb_emit_matrix_epi(p, res.addr, i, j);
lbValue a = lb_emit_matrix_ev(p, lhs, i, k);
lbValue b = lb_emit_matrix_ev(p, rhs, k, j);
lbValue c = lb_emit_arith(p, Token_Mul, a, b, elem);
lbValue d = lb_emit_load(p, dst);
lbValue e = lb_emit_arith(p, Token_Add, d, c, elem);
lb_emit_store(p, dst, e);
}
}
}
return lb_addr_load(p, res);
}
}
lbValue lb_emit_arith_matrix(lbProcedure *p, TokenKind op, lbValue lhs, lbValue rhs, Type *type) {
GB_ASSERT(is_type_matrix(lhs.type) || is_type_matrix(rhs.type));
@@ -486,30 +734,7 @@ lbValue lb_emit_arith_matrix(lbProcedure *p, TokenKind op, lbValue lhs, lbValue
if (op == Token_Mul) {
if (xt->kind == Type_Matrix) {
if (yt->kind == Type_Matrix) {
GB_ASSERT(is_type_matrix(type));
GB_ASSERT(xt->Matrix.column_count == yt->Matrix.row_count);
GB_ASSERT(are_types_identical(xt->Matrix.elem, yt->Matrix.elem));
Type *elem = xt->Matrix.elem;
lbAddr res = lb_add_local_generated(p, type, true);
for (i64 i = 0; i < xt->Matrix.row_count; i++) {
for (i64 j = 0; j < yt->Matrix.column_count; j++) {
for (i64 k = 0; k < xt->Matrix.column_count; k++) {
lbValue dst = lb_emit_matrix_epi(p, res.addr, i, j);
lbValue a = lb_emit_matrix_ev(p, lhs, i, k);
lbValue b = lb_emit_matrix_ev(p, rhs, k, j);
lbValue c = lb_emit_arith(p, op, a, b, elem);
lbValue d = lb_emit_load(p, dst);
lbValue e = lb_emit_arith(p, Token_Add, d, c, elem);
lb_emit_store(p, dst, e);
}
}
}
return lb_addr_load(p, res);
return lb_emit_matrix_mul(p, lhs, rhs, type);
}
}