[Flint] moving ir gen specific code to separate file

src/software/interpreter/Runtime.zig

@@ -39,12 +39,16 @@ scratch: []u32,
 pub fn init(allocator: std.mem.Allocator, program: *const Program) !Self {
     const registers = try allocator.alloc(u32, program.register_count);
     errdefer allocator.free(registers);
+
     const scratch = try allocator.alloc(u32, program.scratch_count);
     errdefer allocator.free(scratch);
+
     @memset(registers, 0);
     @memset(scratch, 0);
+
     for (program.initializers) |initializer|
         registers[initializer.register] = initializer.value;
+
     return .{ .allocator = allocator, .registers = registers, .scratch = scratch };
 }
 

src/software/interpreter/root.zig

@@ -1,7 +1,4 @@
 //! Software bytecode interpreter for the backend-agnostic shader IR.
-//!
-//! This first slice supports allocation-free scalar execution of 32-bit scalar
-//! and vector arithmetic, interface I/O, control flow, and block parameters.
 
 pub const bytecode = @import("bytecode.zig");
 pub const Program = @import("Program.zig");