ARM Compiler toolchain Using the Compiler: Inline assembler instruction restrictions in C and C++ code

Inline assembler instruction restrictions in C and C++ code

The following instructions are not supported in the inline assembler:

BKPT , BX , BXJ, and BLX instructions
Note
You can insert a BKPT instruction in C and C++ code by using the __breakpoint() intrinsic.
LDR Rn, =expression pseudo-instruction. Use MOV Rn, expression instead. (This can generate a load from a literal pool.)
LDRT, LDRBT, STRT, and STRBT instructions
MUL, MLA, UMULL, UMLAL, SMULL, and SMLAL flag setting instructions
MOV or MVN flag-setting instructions where the second operand is a constant
user-mode LDM instructions
ADR and ADRL pseudo-instructions.
Note
You can use MOV Rn, &expression; instead of the ADR and ADRL pseudo-instructions.

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