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__svc_indirect_r7

__value_in_regs

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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

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__builtin_popcount

__memory_changed

__pld

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__schedule_barrier

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__pld

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Home > Compiler-specific Features > Instruction intrinsics > __pld

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);

    while (!*interrupt);

    *uart = data1;        // trigger uart as soon as interrupt occurs
    *(uart+1) = data2;
}

See also

__pli
PLD and PLI in the Assembler Guide.

Copyright © 2007 ARM Limited. All rights reserved.	ARM DUI 0376A
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