FS#11335 by me: make ARM assembly functions thumb-friendly

We can't pop into pc on ARMv4t when using thumb: the T bit won't be
modified if we are returning to a thumb function
Code running on ARMv4t should use the new ldrpc / ldmpc macros instead
of ldr pc, [sp], #4 and ldm(cond) sp!, {regs, pc}
No modification on pure ARM builds and ARMv5+

Note: USE_THUMB is currently never defined, no targets can currently be
built with -mthumb, see FS#6734

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26756 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 3 insertions, 2 deletions

diff --git a/apps/codecs/libmad/imdct_l_arm.S b/apps/codecs/libmad/imdct_l_arm.S
index b86ba1120d..b511ff169d 100644
--- a/apps/codecs/libmad/imdct_l_arm.S
+++ b/apps/codecs/libmad/imdct_l_arm.S
@@ -45,6 +45,7 @@
 *
 ****************************************************************************/
 
+#include "config.h"
 
 /*
    On entry:
@@ -823,7 +824,7 @@ normal_block_x18_to_x35:
     @----
 
     add     sp, sp, #(21*4)             @ return stack frame
-    ldmia   sp!, { r4 - r11, pc }       @ restore callee saved regs, and return
+    ldmpc   regs=r4-r11                 @ restore callee saved regs, and return
 
     @----
 
@@ -992,7 +993,7 @@ start_block_x18_to_x35:
     @----
 
     add     sp, sp, #(21*4)             @ return stack frame
-    ldmia   sp!, { r4 - r11, pc }       @ restore callee saved regs, and return
+    ldmpc   regs=r4-r11                 @ restore callee saved regs, and return
 
     @----
     @END