uclibc-ng/libc/sysdeps/linux/arm/bits/arm_asm.h

/* Various definitons used the the ARM uClibc assembly code.  */
#ifndef _ARM_ASM_H
#define _ARM_ASM_H

#ifdef __thumb2__
# ifdef __ASSEMBLER__
.thumb
.syntax unified
# endif /* __ASSEMBLER__ */
#define IT(t, cond) i##t cond
#else
/* XXX: This can be removed if/when we require an assembler that supports
   unified assembly syntax.  */
#define IT(t, cond)
/* Code to return from a thumb function stub.  */
# if defined __ARM_ARCH_4T__ && defined __THUMB_INTERWORK__
#  define POP_RET pop   {r2, r3}; bx    r3
# else
#  define POP_RET pop   {r2, pc}
# endif
#endif /* __thumb2__ */

#if defined(__ARM_ARCH_6M__)
/* Force arm mode to flush out errors on M profile cores.  */
#undef IT
#define THUMB1_ONLY 1
#endif

#endif /* _ARM_ASM_H */