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Using the Inline and Embedded Assemblers of the AR
Compiler support for inline assembly language
Inline assembler support in the compiler
Restrictions on inline assembler support in the co
Inline assembly language syntax with the __asm key
Inline assembly language syntax with the asm keywo
Inline assembler rules for compiler keywords __asm
Restrictions on inline assembly operations in C an
Inline assembler register restrictions in C and C+
Inline assembler processor mode restrictions in C
Inline assembler Thumb instruction set restriction
Inline assembler Vector Floating-Point (VFP) restr
Inline assembler instruction restrictions in C and
Miscellaneous inline assembler restrictions in C a
Inline assembler and register access in C and C++
Inline assembler and the # constant expression spe
Inline assembler and instruction expansion in C an
Expansion of inline assembler instructions that us
Expansion of inline assembler load and store instr
Inline assembler effect on processor condition fla
Inline assembler operands in C and C++ code
Inline assembler expression operands in C and C++
Inline assembler register list operands in C and C
Inline assembler intermediate operands in C and C+
Inline assembler function calls and branches in C
Behavior of BL and SVC without optional lists in C
Inline assembler BL and SVC input parameter list i
Inline assembler BL and SVC output value list in C
Inline assembler BL and SVC corrupted register lis
Inline assembler branches and labels in C and C++
Inline assembler and virtual registers
Embedded assembler support in the compiler
Embedded assembler syntax in C and C++
Effect of compiler ARM and Thumb states on embedde
Restrictions on embedded assembly language functio
Compiler generation of embedded assembly language
Access to C and C++ compile-time constant expressi
Differences between expressions in embedded assemb
Manual overload resolution in embedded assembler
__offsetof_base keyword for related base classes i
Compiler-supported keywords for calling class memb
__mcall_is_virtual(D, f)
__mcall_is_in_vbase(D, f)
__mcall_offsetof_vbase(D, f)
__mcall_this_offset(D, f)
__vcall_offsetof_vfunc(D, f)
Calling nonstatic member functions in embedded ass
Calling a nonvirtual member function
Calling a virtual member function
Legacy inline assembler that accesses sp, lr, or p
Accessing sp (r13), lr (r14), and pc (r15) in lega
Differences in compiler support of inline and embe
Compiler User Guide
Access to C and C++ compile-time constant expressions from embedded assembler
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| Home > Using the Inline and Embedded Assemblers of the ARM Compiler > Access to C and C++ compile-time constant expressions from embedded assembler | |||
You can use the __cpp keyword to access C and
C++ compile-time constant expressions, including the addresses of
data or functions with external linkage, from the assembly code.
The expression inside the __cpp must be a constant
expression suitable for use as a C++ static initialization. See 3.6.2
Initialization of non-local objects and 5.19
Constant expressions in ISO/IEC 14882:2003.
Example 22 shows a
constant replacing the use of __cpp(:expr)
Example 22. __cpp(expr)
LDR r0, =__cpp(&some_variable)LDR r1, =__cpp(some_function)BL __cpp(some_function)MOV r0, #__cpp(some_constant_expr)
Names in the __cpp expression are looked
up in the C++ context of the __asm function.
Any names in the result of a __cpp expression
are mangled as required and automatically have IMPORT statements
generated for them.
See also- Concepts
- Other information
ISO/IEC 14882:2003
Section 3.6.2 Initialization of non-local objects
Section 5.19 Constant expressions.
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