RealView Compiler Reference Guide
Home Products Events Support	Search Keil.com for:

Technical Support

On-Line Manuals

RealView Compiler Reference Guide

Compiler Command-line Options

Language Extensions

Compiler-specific Features

Keywords and operators

__svc_indirect_r7

__value_in_regs

__declspec attributes

__declspec(dllexport)

__declspec(dllimport)

__declspec(noinline)

__declspec(noreturn)

__declspec(nothrow)

__declspec(notshared)

__declspec(thread)

Function attributes

__attribute__((alias))

__attribute__((always_inline))

__attribute__((const))

__attribute__((deprecated))

__attribute__((malloc))

__attribute__((noinline))

__attribute__((noreturn))

__attribute__((pure))

__attribute__((section))

__attribute__((unused))

__attribute__((used))

__attribute__((weak))

Type attributes

__attribute__((aligned))

__attribute((packed))

__attribute__((transparent_union))

Variable attributes

__attribute__((alias))

__attribute__((at(address)))

__attribute__((aligned))

__attribute__((deprecated))

__attribute__((packed))

__attribute__((section))

__attribute__((transparent_union))

__attribute__((unused))

__attribute__((used))

__attribute__((weak))

__attribute__((zero_init))

#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

__return_address

__schedule_barrier

__strt

ARMv6 SIMD intrinsics

ETSI basic operations

C55x intrinsics

Named register variables

Compiler predefines

Predefined macros

C and C++ Implementation Details

Via File Syntax

Standard C Implementation Definition

Standard C++ Implementation Definition

C and C++ Compiler Implementation Limits

__strt

RealView^® Compilation Tools for μVision Compiler Reference Guide

Version 3.1

Home > Compiler-specific Features > Instruction intrinsics > __strt

4.7.40. `__strt`

This intrinsic inserts an assembly language instruction of the form STR{size}T into the instruction stream generated by the compiler. It enables you to store data to memory in your C or C++ code using an STRT instruction.

Syntax

void __strt(unsigned int val, volatile void *ptr)

Where:

val

Is the value to be written to memory.

ptr

Points to the address of the data to be written to in memory. To specify the size of the data to be written, cast the parameter to an appropriate integral type.

Table 4.11. Access widths supported by the __strt intrinsic

Instruction	Size of data loaded	C cast
`STRBT`	unsigned byte	`(`char `*)`
`STRHT`	unsigned halfword	`(`short int `*)`
`STRT`	word	`(`int `*)`

Errors

The compiler does not recognize the __strt intrinsic when compiling for a target that does not support the STRT instruction. The compiler generates either a warning or an error in this case.

The __strt intrinsic does not support access either to signed data or to doubleword data. The compiler generates an error if you specify an access width that is not supported.

Example

void foo(void)
{
    int loc=0xff;
    __strt(0x20, (volatile char *)loc);
}

Compiling this code produces:

||foo|| PROC
    MOV      r0,#0xff
    MOV      r1,#0x20
    STRBT    r1,[r0],#0
    BX       lr
    ENDP

See also

‑‑thumb
LDR and STR (User mode) in the Assembler Guide.

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

Home > Compiler-specific Features > Instruction intrinsics > `__strt`