Arm VERSION 1.2 Manuale Utente Scaricare il pdf (Pagina 184)

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ARM Instruction Reference

4.8.3 MSR

Load specified fields of the CPSR or SPSR with an immediate constant, or from the

contents of a general-purpose register.

Syntax

MSR{cond} <psr>_<fields>, #immed_8r

MSR{cond} <psr>_<fields>, Rm

where:

cond

is an optional condition code (see Conditional execution on page 4-4).

<psr>

is either CPSR or SPSR.

specifies the field or fields to be moved.

can be one or more of:

control field mask byte (PSR[7:0])

extension field mask byte (PSR[15:8])

status field mask byte (PSR[23:16)

flags field mask byte (PSR[31:24]).

immed_8r

is an expression evaluating to a numeric constant. The constant must

correspond to an 8-bit pattern rotated by an even number of bits within a

32-bit word.

is the source register.

Usage

See MRS on page 4-73.

Condition flags

This instruction updates the flags explicitly if the

field is specified.

Architectures

This instruction is available in ARM architecture versions 3 and above.

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Arm VERSION 1.2 Manuale Utente Pagina 184

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