[Flint] moving ir gen specific code to separate file

src/intel/compiler/targets/gen9/validator.zig

@@ -0,0 +1,173 @@
+const std = @import("std");
+const compute = @import("compute/compute.zig");
+const shared = @import("../../ir/validator.zig");
+const instruction = @import("../../ir/instruction.zig");
+const operand = @import("../../ir/operand.zig");
+const program_ir = @import("../../ir/program.zig");
+
+pub const Error = shared.Error || compute.Error || error{
+    UnsupportedGeneration,
+    UnsupportedDispatchWidth,
+    UnsupportedGrfSize,
+    UnsupportedExecutionSize,
+    UnsupportedDataType,
+    InvalidPhysicalFlag,
+    InvalidPayloadLayout,
+};
+
+pub fn validate(program: *const program_ir.Program) Error!void {
+    try shared.validate(program);
+
+    if (program.device_info.generation != .gen9)
+        return Error.UnsupportedGeneration;
+    try compute.validateWorkgroupSize(program.workgroup_size);
+    if (program.dispatch_width != .simd8 or !program.device_info.supportsDispatch(.simd8))
+        return Error.UnsupportedDispatchWidth;
+    if (program.device_info.grf_size_bytes != 32)
+        return Error.UnsupportedGrfSize;
+
+    for (program.blocks.entries.items) |block_entry| {
+        const block = block_entry orelse continue;
+        for (block.instructions.items) |instruction_id| {
+            const inst = program.instructions.get(instruction_id) orelse return Error.InvalidInstruction;
+            switch (inst.execution_size) {
+                .simd1, .simd8 => {},
+                else => return Error.UnsupportedExecutionSize,
+            }
+            try validateInstruction(inst.*);
+        }
+        try validateTerminator(block.terminator.?);
+    }
+
+    for (program.virtual_registers.entries.items) |entry| {
+        const register = entry orelse continue;
+        if (!register.element_type.isInitialTargetType())
+            return Error.UnsupportedDataType;
+    }
+
+    try validatePayload(program);
+}
+
+fn validateInstruction(inst: instruction.Instruction) Error!void {
+    if (inst.predicate) |predicate|
+        try validateFlag(predicate.flag);
+    switch (inst.operation) {
+        .load_global_invocation_id => |op| try validateDestination(op.destination),
+        .load_buffer => |op| {
+            try validateDestination(op.destination);
+            try validateSource(op.byte_offset);
+        },
+        .store_buffer => |op| {
+            try validateSource(op.byte_offset);
+            try validateSource(op.source);
+        },
+        .move => |op| {
+            try validateDestination(op.destination);
+            try validateSource(op.source);
+        },
+        .binary => |op| {
+            try validateDestination(op.destination);
+            try validateSource(op.lhs);
+            try validateSource(op.rhs);
+        },
+        .compare => |op| {
+            try validateFlag(op.destination);
+            try validateSource(op.lhs);
+            try validateSource(op.rhs);
+        },
+        .parallel_copy => |copy| {
+            for (copy.register_copies) |item| {
+                try validateDestination(item.destination);
+                try validateSource(item.source);
+            }
+            for (copy.flag_copies) |item| switch (item.source) {
+                .constant => {},
+                .dynamic => |predicate| try validateFlag(predicate.flag),
+            };
+        },
+    }
+}
+
+fn validateSource(source: operand.Source) Error!void {
+    try validateType(source.type);
+    switch (source.register) {
+        .immediate => |immediate| try validateImmediate(immediate),
+        else => {},
+    }
+}
+
+fn validateDestination(destination: operand.Destination) Error!void {
+    try validateType(destination.type);
+}
+
+fn validateType(data_type: operand.DataType) Error!void {
+    if (!data_type.isInitialTargetType())
+        return Error.UnsupportedDataType;
+}
+
+fn validateImmediate(immediate: operand.Immediate) Error!void {
+    switch (immediate) {
+        .u32, .i32, .f32 => {},
+    }
+}
+
+fn validateTerminator(terminator: instruction.Terminator) Error!void {
+    switch (terminator) {
+        .conditional_branch => |branch| {
+            try validateFlag(branch.predicate.flag);
+            try validateEdge(branch.true_edge);
+            try validateEdge(branch.false_edge);
+        },
+        .jump => |edge| try validateEdge(edge),
+        else => {},
+    }
+}
+
+fn validateEdge(edge: instruction.Edge) Error!void {
+    for (edge.arguments) |argument| switch (argument) {
+        .source => {},
+        .predicate => |predicate_value| switch (predicate_value) {
+            .constant => {},
+            .dynamic => |predicate| try validateFlag(predicate.flag),
+        },
+    };
+}
+
+fn validateFlag(flag: operand.FlagRef) Error!void {
+    switch (flag) {
+        .virtual => {},
+        .physical => |physical| if (physical.register != 0 or physical.subregister > 1)
+            return Error.InvalidPhysicalFlag,
+    }
+}
+
+fn validatePayload(program: *const program_ir.Program) Error!void {
+    if (program.payload.header_grf) |header| {
+        if (header.number != 0 or header.byte_offset != 0)
+            return Error.InvalidPayloadLayout;
+    }
+}
+
+test "[gen9] validator: layer target legality over shared structural validation" {
+    const Builder = @import("../../ir/Builder.zig");
+    const device = @import("../../device.zig");
+
+    const gen11_device: device.DeviceInfo = .{
+        .generation = .gen11,
+        .platform = .ice_lake,
+        .pci_device_id = 0x8a52,
+        .grf_count = 128,
+        .supports_simd16 = true,
+    };
+    var program = program_ir.Program.init(std.testing.allocator, .{ 1, 1, 1 }, gen11_device, .simd16);
+    defer program.deinit();
+    var builder = Builder.init(&program);
+    const entry = try builder.addBlock("entry");
+    try builder.setTerminator(entry, .end_thread);
+
+    try shared.validate(&program);
+    try std.testing.expectError(Error.UnsupportedGeneration, validate(&program));
+
+    program.device_info.generation = .gen9;
+    try std.testing.expectError(Error.UnsupportedDispatchWidth, validate(&program));
+}