HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 48
HD6417034B
Manufacturer Part Number
HD6417034B
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417034B.pdf
(687 pages)
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Section 2 CPU
Load-Store Architecture: Basic operations are executed between registers. For operations that
involve memory, data is loaded into to the registers and executed (load-store architecture).
Instructions such as AND that manipulate bits, however, are executed directly in memory.
Delayed Branch Instructions: Unconditional branch instructions are delayed. Pipeline disruption
during branching is reduced by first executing the instruction that follows the branch instruction,
and then branching. See the SH-1/SH-2/SH-DSP Software Manual for details.
Table 2.3
SH7000 Series CPU
BRA
ADD
Multiplication/Accumulation Operation: The five-stage pipeline system and the on-chip
multiplier enable 16-bit
16-bit
cycles.
T bit: T bit (in the status register) is set according to the result of a comparison, and in turn is the
condition (True/False) that determines if the program will branch. The T bit in the status register is
only changed by selected instructions, thus improving the processing speed.
Table 2.4
SH7000 Series CPU
CMP/GE
BT
BF
ADD
TST
BT
Immediate Data: Byte (8-bit) immediate data is located in the instruction code. Word or
longword immediate data is not located in instruction codes but is stored in a memory table. The
memory table is accessed by an immediate data transfer instruction (MOV) using the PC relative
addressing mode with displacement.
Rev. 7.00 Jan 31, 2006 page 22 of 658
REJ09B0272-0700
TRGET0
TRGET1
#–1,R0
R0,R0
TRGET
16-bit + 42-bit
TRGET
R1,R0
Delayed Branch Instructions
T Bit
R1,R0
16-bit
42-bit multiplication/accumulation operations can be executed in 2–3
Description
T bit is set when R0 ≥ R1. The program
branches to TRGET0 when R0 ≥ R1
and to TRGET1 when R0<R1.
T bit is not changed by ADD. T bit is set
when R0 = 0. The program branches if
R0 = 0.
Description
Executes an ADD before
branching to TRGET.
32-bit multiplication operations to be executed in 1–3 cycles.
Conventional CPU
ADD.W
BRA
Conventional CPU
CMP.W
BGE
BLT
SUB.W #1,R0
BEQ
TRGET
TRGET0
TRGET1
TRGET
R1,R0
R1,R0
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