exo: add sdmmc test program

libraries/libexosphere/source/libc/libgcc_thumb_case.arch.arm.s

@@ -0,0 +1,35 @@
+/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
+This file is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3, or (at your option) any
+later version.
+This file is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+
+.section    .text.__gnu_thumb1_case_uqi, "ax", %progbits
+.globl __gnu_thumb1_case_uqi
+.align      0
+.thumb_func
+.syntax unified
+__gnu_thumb1_case_uqi:
+    push    {r1}
+    mov     r1, lr
+    lsrs    r1, r1, #1
+    lsls    r1, r1, #1
+    ldrb    r1, [r1, r0]
+    lsls    r1, r1, #1
+    add     lr, lr, r1
+    pop     {r1}
+    bx      lr
+.type __gnu_thumb1_case_uqi, %function
+.size __gnu_thumb1_case_uqi, .-__gnu_thumb1_case_uqi