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__svc_indirect_r7

__value_in_regs

__declspec attributes

__declspec(dllexport)

__declspec(dllimport)

__declspec(noinline)

__declspec(noreturn)

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__attribute__((alias))

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__attribute__((malloc))

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__attribute__((used))

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__attribute__((alias))

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__attribute__((packed))

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#pragma [no_]anon_unions

#pragma arm section [section_sort_list]

#pragma diag_default tag[,tag,...]

#pragma diag_error tag[,tag,...]

#pragma diag_remark tag[,tag,...]

#pragma diag_suppress tag[,tag,...]

#pragma diag_warning tag[, tag, ...]

#pragma [no_]exceptions_unwind

#pragma hdrstop

#pragma import symbol_name

#pragma [no_]inline

#pragma [no_]softfp_linkage

#pragma unroll [(n)]

#pragma unroll_completely

Instruction intrinsics

__builtin_constant_p

__builtin_expect

__builtin_frame_address

__builtin_return_address

__builtin_popcount

__memory_changed

__rbit

__return_address

__schedule_barrier

ARMv6 SIMD intrinsics

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C55x intrinsics

Named register variables

Compiler predefines

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C and C++ Implementation Details

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C and C++ Compiler Implementation Limits

__rbit

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Home > Compiler-specific Features > Instruction intrinsics > __rbit

4.7.29. `__rbit`

This intrinsic inserts an RBIT instruction into the instruction stream generated by the compiler. It enables you to reverse the bit order in a 32‑bit word from within your C or C++ code.

Syntax

unsigned int __rbit(unsigned int val)

where:

val: is the data value whose bit order is to be reversed.

Return value

The __rbit intrinsic returns the value obtained from val by reversing its bit order.

See also

REV, REV16, REVSH, and RBIT in the Assembler Guide.

Copyright © 2007 ARM Limited. All rights reserved.	ARM DUI 0376A
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Home > Compiler-specific Features > Instruction intrinsics > `__rbit`