+union u64_u32_u {
+ struct { u32 hi, lo; };
+ u64 val;
+};
+
+#ifdef MANUAL_NO_JUMP_TABLE
+# define default case 775324556: asm(""); default
+#endif
+
+#ifdef WHOLE_PROGRAM
+# define __VISIBLE __attribute__((externally_visible))
+#else
+# define __VISIBLE
+#endif
+
+#define UNIQSEC __FILE__ "." __stringify(__LINE__)
+
+#define __ASM(code) asm(".section .text.asm." UNIQSEC "\n\t" code)
+
+#if MODE16 == 1
+// Notes a function as externally visible in the 16bit code chunk.
+# define VISIBLE16 __VISIBLE
+// Notes a function as externally visible in the 32bit code chunk.
+# define VISIBLE32
+// Designate a variable as (only) visible to 16bit code.
+# define VAR16 __section(".data16." UNIQSEC)
+// Designate a variable as visible to both 32bit and 16bit code.
+# define VAR16_32 VAR16 __VISIBLE
+// Designate a variable visible externally.
+# define VAR16EXPORT __section(".data16.export." UNIQSEC) __VISIBLE
+// Designate a variable at a specific 16bit address
+# define VAR16FIXED(addr) __aligned(1) __VISIBLE __section(".fixedaddr." __stringify(addr))
+// Designate top-level assembler as 16bit only.
+# define ASM16(code) __ASM(code)
+# define ASM32(code)
+#else
+# define VISIBLE16
+# define VISIBLE32 __VISIBLE
+# define VAR16 __section(".discard.var16." UNIQSEC)
+# define VAR16_32 VAR16 __VISIBLE __weak
+# define VAR16EXPORT VAR16_32
+# define VAR16FIXED(addr) VAR16_32
+# define ASM16(code)
+# define ASM32(code) __ASM(code)
+#endif