SH7751 Datasheet, PDF (16/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Item
5.7 Usage Notes
Page
170
6.5 Floating-Point
182
Exceptions
6.6.2 Pair Single-
184
Precision Data Transfer
6.7 Usage Notes
185 to
188
7.3 Instruction Set 207
Table 7.12 Floating-
Point Graphics
Acceleration Instructions
7.4 Usage Notes
207 to
209
8.4 Usage Notes
238
Revision (See Manual for Details)
Description amended
2. If a general exception or interrupt occurs when SR.BL = 1
a. General exception
When a general exception other than a user break
occurs, manual reset occurs. The value in EXPEVT at
this time is H'0000 0020; the value of the SPC and SSR
registers is undefined.
…
3. SPC when an exception occurs
a. Re-execution type general exception
The PC value for the instruction in which the general
exception occurred is set in SPC, and the instruction is
re-executed after returning from exception handling. If
an exception occurs in a delay slot instruction, however,
the PC value for the delay slot instruction is saved in
SPC regardless of whether or not the preceding delayed
branch instruction condition is satisfied.
b. Completion type general exception or interrupt
The PC value for the instruction following that in which
the general exception occurred is set in SPC. If an
exception occurs in a branch instruction with delay slot,
however, the PC value for the branch destination is
saved in SPC.
Description amended
For information on possibilities (which differ depending on the
individual instruction), see section 9, Instruction Descriptions, in
the SH-4 Software Manual.
Description amended
The powerful geometric operation instructions, FPU also
supports high-speed data transfer instructions.
When FPSCR.SZ = 1, FPU can perform data transfer by means
of pair single-precision data transfer instructions.
Newly added
Table amended
Instruction
FRCHG
FSCHG
Opera tion
~FPSCR.FR → FPSCR.FR
~FPSCR.SZ → FPSCR.SZ
Instruction Code
Privileged T Bit
1111101111111101 —
—
1111001111111101 —
—
Newly added
Newly added
Rev.4.00 Oct. 10, 2008 Page xvi of xcviii
REJ09B0370-0400