s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 127

• Manufacturer Part Number: s3c4510b
• Description: 16/32-bit Risc Microcontroller
• Manufacturer: Samsung Semiconductor, Inc.

S3C4510B
FORMAT 12: LOAD ADDRES
OPERATION
These instructions calculate an address by adding an 10-bit constant to either the PC or the SP, and load the
resulting address into a register. The THUMB assembler syntax is shown in the following table.
NOTE: The value specified by #Imm is a full 10-bit value, but this must be word-aligned (ie with bits 1:0 set to 0)
Where the PC is used as the source register (SP = 0), bit 1 of the PC is always read as 0. The value of the PC
will be 4 bytes greater than the address of the instruction before bit 1 is forced to 0.
The CPSR condition codes are unaffected by these instructions.
SP
0
1
ADD Rd, PC, #Imm
ADD Rd, SP, #Imm
THUMB Assembler
since the assembler places #Imm >> 2 in field Word 8.
15
1
14
0
13
1
12
0
ADD Rd, R15, #Imm
ADD Rd, R13, #Imm
ARM Equivalent
SP
11
10
[7:0] 8-bit Unsigned Constant
[10:8] Destination Register
[11] Source
0 = PC
1 = SP
Table 3-19. Load Address
Figure 3-41. Format 12
Rd
8
Add #Imm to the current value of the program counter
(PC) and load the result into Rd.
Add #Imm to the current value of the stack pointer (SP)
and load the result into Rd.
7
Word 8
Action
INSTRUCTION SET
0
3-85