Expand SPIR-V features

build.zig

@@ -66,6 +66,23 @@ pub fn build(b: *std.Build) !void {
         b.getInstallStep().dependOn(&install_std_docs.step);
     }
 
+    const update_cpu_features = b.addExecutable(.{
+        .name = "update-cpu-features",
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("tools/update_cpu_features.zig"),
+            .target = b.graph.host,
+            .imports = &.{.{
+                .name = "spirv_spec",
+                .module = b.createModule(.{
+                    .root_source_file = b.path("src/codegen/spirv/spec.zig"),
+                    .target = b.graph.host,
+                }),
+            }},
+        }),
+    });
+    const run_update_cpu_features = b.addRunArtifact(update_cpu_features);
+    if (b.args) |args| run_update_cpu_features.addArgs(args);
+
     if (flat) {
         b.installFile("LICENSE", "LICENSE");
         b.installFile("README.md", "README.md");
@@ -81,6 +98,9 @@ pub fn build(b: *std.Build) !void {
     docs_step.dependOn(langref_step);
     docs_step.dependOn(std_docs_step);
 
+    const update_cpu_features_step = b.step("update-cpu-features", "Update CPU Features");
+    update_cpu_features_step.dependOn(&run_update_cpu_features.step);
+
     const skip_debug = b.option(bool, "skip-debug", "Main test suite skips debug builds") orelse false;
     const skip_release = b.option(bool, "skip-release", "Main test suite skips release builds") orelse false;
     const skip_release_small = b.option(bool, "skip-release-small", "Main test suite skips release-small builds") orelse skip_release;

lib/std/Target.zig

@@ -1144,7 +1144,7 @@ pub const Cpu = struct {
         pub const Set = struct {
             ints: [usize_count]usize,
 
-            pub const needed_bit_count = 288;
+            pub const needed_bit_count = 421;
             pub const byte_count = (needed_bit_count + 7) / 8;
             pub const usize_count = (byte_count + (@sizeOf(usize) - 1)) / @sizeOf(usize);
             pub const Index = std.math.Log2Int(std.meta.Int(.unsigned, usize_count * @bitSizeOf(usize)));
@@ -1772,6 +1772,8 @@ pub const Cpu = struct {
                 .spirv_kernel,
                 .spirv_fragment,
                 .spirv_vertex,
+                .spirv_task,
+                .spirv_mesh,
                 => &.{ .spirv32, .spirv64 },
             };
         }
@@ -3033,6 +3035,12 @@ pub fn cTypeBitSize(target: *const Target, c_type: CType) u16 {
             .longdouble => return 128,
         },
 
+        // OpenGL has no well defined C ABI, we do this to prevent panic when using floating point types.
+        .opengl => switch (c_type) {
+            .char, .short, .ushort, .int, .uint, .float, .long, .ulong, .longlong, .ulonglong => return 32,
+            .double, .longdouble => return 64,
+        },
+
         .opencl, .vulkan => switch (c_type) {
             .char => return 8,
             .short, .ushort => return 16,
@@ -3055,7 +3063,6 @@ pub fn cTypeBitSize(target: *const Target, c_type: CType) u16 {
 
         .ps3,
         .contiki,
-        .opengl,
         => @panic("specify the C integer and float type sizes for this OS"),
     }
 }