s3c2410a Samsung Semiconductor, Inc., s3c2410a Datasheet - Page 177

• Manufacturer Part Number: s3c2410a
• Description: 16/32-bit Risc Arm Microprocessor
• Manufacturer: Samsung Semiconductor, Inc.

S3C2410A
FORMAT 14: PUSH/POP REGISTERS
OPERATION
The instructions in this group allow registers 0-7 and optionally LR to be pushed onto the stack, and registers 0-7
and optionally PC to be popped off the stack. The THUMB assembler syntax is shown in Table 4-15.
L
0
0
1
1
The stack is always assumed to be Full Descending.
15
1
B
0
1
0
1
14
0
PUSH { Rlist }
PUSH { Rlist, LR }
POP { Rlist }
POP { Rlist, PC }
THUMB assembler
13
1
12
1
11
L
Table 4-15. PUSH and POP Instructions
10
1
[7:0] Register List
[8] PC/LR Bit
0 = Do not store LR/Load PC
1 = Store LR/Load PC
[11] Load/Store Bit
0 = Store to memory
1 = Load from memory
STMDB R13!, { Rlist }
STMDB R13!,
{ Rlist, R14 }
LDMIA R13!, { Rlist }
LDMIA R13!, {Rlist, R15}
Figure 4-15. Format 14
9
0
ARM equivalent
R
8
NOTE
7
Push the registers specified by Rlist onto
the stack. Update the stack pointer.
Push the Link Register and the registers
specified by Rlist (if any) onto the stack.
Update the stack pointer.
Pop values off the stack into the registers
specified by Rlist. Update the stack
pointer.
Pop values off the stack and load into the
registers specified by Rlist. Pop the PC off
the stack. Update the stack pointer.
Rlist
Action
THUMB INSTRUCTION SET
0
4-31