--- /dev/null
+--- a/stage2/fsys_iso9660.c
++++ b/stage2/fsys_iso9660.c
+@@ -83,10 +83,7 @@ iso9660_devread (int sector, int byte_of
+
+ sector += (byte_offset >> sector_size_lg2);
+ byte_offset &= (buf_geom.sector_size - 1);
+- asm volatile ("shl%L0 %1,%0"
+- : "=r"(sector)
+- : "Ic"((int8_t)(ISO_SECTOR_BITS - sector_size_lg2)),
+- "0"(sector));
++ sector <<= ISO_SECTOR_BITS - sector_size_lg2;
+
+ #if !defined(STAGE1_5)
+ if (disk_read_hook && debug)