RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler-specific Features
Syntax
void __nop(void)
See also
• __sev on page 4-87
• __schedule_barrier on page 4-85
• __wfe on page 4-94
• __wfi on page 4-94
• __yield on page 4-95
• NOP, SEV, WFE, WFI, and YIELD on page 4-139 in the Assembler Guide
• Generic intrinsics on page 3-3 in the Compiler User Guide.
4.7.24 __pld
This intrinsic inserts a data prefetch, for example PLD, into the instruction stream
generated by the compiler. It enables you to signal to the memory system from your C
or C++ program that a data load from an address is likely in the near future.
Syntax
void __pld(...)
Where:
... denotes any number of pointer or integer arguments specifying addresses
of memory to prefetch.
Restrictions
If the target architecture does not support data prefetching, this intrinsic has no effect.
Example
extern int data1;
extern int data2;
volatile int* interrupt = (volatile int *)0x8000;
volatile int* uart = (volatile int *)0x9000;
void get(void)
{
__pld(data1, data2);
ARM DUI 0348A Copyright © 2007, 2010 ARM Limited. All rights reserved. 4-79
Non-Confidential