Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
208
12.6.11.27 VSTM
Floating-point Store Multiple.
Syntax
VSTM{mode}{cond}{.size} Rn{!}, list
where:
mode is the addressing mode:
- IA Increment After. The consecutive addresses start at the address speci
fied in Rn.
This is the default and can be omitted.
- DB Decrement Before. The consecutive addresses end just before the
address specified in Rn.
cond is an optional condition code, see “Conditional Execution” .
size is an optional data size specifier.
If present, it must be equal to the size in bits, 32 or 64, of the registers in list.
Rn is the base register. The SP can be used
! is the function that causes the instruction to write a modified value back to Rn.
Required if mode == DB.
list is a list of the extension registers to be stored, as a list of consecutively num
bered doubleword or singleword registers, separated by commas and sur
rounded by brackets.
Operation
This instruction:
 Stores multiple extension registers to consecutive memory locations using a base address from an ARM
core register.
Restrictions
The restrictions are:
 list must contain at least one register.
If it contains doubleword registers it must not contain more than 16 registers.
 Use of the PC as Rn is deprecated.
Condition Flags
These instructions do not change the flags.