6.4 __arm_mrc, __arm_mrc2, __arm_mrrc, __arm_mrrc2 Intrinsic Function
Inserts a coprocessor read instruction, MRC,
MRC2, MRRC, or
MRRC2. Returns the value of the specified
coprocessor register. The parameters coproc,
opc1, opc2,
CRn, and CRm
will be encoded in the instruction and must therefore
be constants.
These intrinsic functions are defined according to the Arm C Language Extensions (ACLE).
Suggested Replacement
__builtin_arm_mrc
__builtin_arm_mrc2
__builtin_arm_mrrc
__builtin_arm_mrrc2
Caveats
None.
Examples
Consider migrating IAR code such
as:
unsigned int __arm_mrc(__cpid coproc, __cpopc opc1, __cpreg CRn, __cpreg CRm, __cpopc opc2);
unsigned int __arm_mrc2(__cpid coproc, __cpopc opc1, __cpreg CRn, __cpreg CRm, __cpopc opc2);
unsigned long long __arm_mrrc(__cpid coproc, __cpopc opc1, __cpreg CRm);
unsigned long long __arm_mrrc2(__cpid coproc, __cpopc opc1, __cpreg CRm);
unsigned int __builtin_arm_mrc(__cpid coproc, __cpopc opc1, __cpreg CRn, __cpreg CRm, __cpopc opc2);
unsigned int __builtin_arm_mrc2(__cpid coproc, __cpopc opc1, __cpreg CRn, __cpreg CRm, __cpopc opc2);
unsigned long long __builtin_arm_mrrc(__cpid coproc, __cpopc opc1, __cpreg CRm);
unsigned long long __builtin_arm_mrrc2(__cpid coproc, __cpopc opc1, __cpreg CRm);
Further Information
None.