x86_64: replace comptime loop by GAS wrapper

kernel/src/arch/x86_64/interrupt.zig

@@ -5,20 +5,21 @@ const c_idt = @cImport(@cInclude("arch/x86_64/idt.h"));
 export const int_msg = "INTERRUPTED!\n";
 
 comptime {
-    @setEvalBranchQuota(2560000);
-    comptime var i = 0;
-    var buf: [512]u8 = undefined;
-    inline while (i < 256) : (i += 1) {
-        const code = std.fmt.bufPrint(buf[0..512],
-            \\.global isr_wrapper{}
-            \\.type isr_wrapper{}, @function
-            \\isr_wrapper{}:
-            \\  mov ${}, %rdi
+    asm(
+        \\.macro isr_wrapperX number
+        \\  isr_wrapper\number:
+        \\  mov $\number, %rdi
         \\  call interrupt_handler
         \\  iretq
-            , .{i,i,i,i}) catch unreachable;
-        asm (code);
-    }
+        \\.endm
+        \\
+        \\.altmacro
+        \\.set i,0
+        \\.rept 256
+        \\  isr_wrapperX %i
+        \\  .set i,i+1
+        \\.endr
+    );
 }
 
 export fn interrupt_handler(int_type: u64) void {