ARM Compiler toolchain v4.1 for µVision Using the Compiler

Using the Inline and Embedded Assemblers of the ARM Compiler
7.12 Inline assembler instruction restrictions in C and C++ code
The following instructions are not supported in the inline assembler:
• BKPT, BX, BXJ, and BLXinstructions
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.
7.12.1 See also
Concepts
• Restrictions on inline assembly operations in C and C++ code on page 7-11.
Reference
• __breakpoint intrinsic on page 5-61.
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