push.w

Push (Wide)

PUSH.W <registers>

Thumb-2 32-bit Push.

Pseudocode Operation

SP ← SP - 4 * PopCount(registers)
for i = 0 to 15
  if registers[i] == 1 then
    memory[SP + 4*(count_of_set_bits_below_i)] ← Ri

Example

PUSH.W registers

Encoding

Binary Layout

1110100

31:25

10

24:23

0

22

1

21

0

20

1101

19:16

0

15

M

14

register_list

13:0

 

Format Thumb Store Multiple

Opcode 0xE92D0000

Extension T32 (Thumb2)

Operands

• registers
  List

Related

More in T32 (Thumb2)

Reference

View in Arm A64 ISA Reference ↗ Arm AArch32 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xB400	PUSH{<c>}{<q>} <registers>		T32		1011 | 0 | 10 | M | register_list
0x092D0000	PUSH{<c>}{<q>} <registers>		A32		cond | 100 | 1 | 0 | 0 | 1 | 0 | 1101 | register_list
0xE92D0000	PUSH{<c>}.W <registers>		T32		1110100 | 10 | 0 | 1 | 0 | 1101 | 0 | M | register_list
0x052D0004	PUSH{<c>}{<q>} <single_register_list>		A32		cond | 010 | 1 | 0 | 0 | 1 | 0 | 1101 | Rt | 000000000100
0xF84D0D04	PUSH{<c>}{<q>} <single_register_list>		T32		111110000 | 10 | 0 | 1101 | Rt | 1 | 1 | 0 | 1 | 00000100

Description

Stores multiple general-purpose registers to the stack, storing to consecutive memory locations ending just below the address in SP, and updates SP to point to the start of the stored data