mc68ec060 Freescale Semiconductor, Inc, mc68ec060 Datasheet - Page 365

• Manufacturer Part Number: mc68ec060
• Description: Mc68060 Superscalar 68k Microprocessor Including The Lc060 And Ec060
• Manufacturer: Freescale Semiconductor, Inc

MC68060 Software Package
Table C-1 shows the code size of each module.
C.2 UNIMPLEMENTED INTEGER INSTRUCTIONS
The MC68060 left some low-use integer instructions unimplemented to streamline internal
operations. This results in overall system performance improvement at the expense of soft-
ware emulation of the unimplemented integer instructions. The M68060SP provides user
object-code compatibility by providing the code needed to emulate these instructions via the
unimplemented integer instruction exception. The M68060SP also provides a software
C-4
_done:
Unimplemented Integer
Unimplemented Integer Instruction Library
Full Floating-Point Kernel
Floating-Point Library
Partial Floating-Point Kernel
bra
next instruction
_top+func_offset
CALLING ROUTINE
Module Name
Table C-1. Call-Out Dispatch Table and Module Size
TABLE MUST IMMEDIATELY
PRECEDE THE THE ENTRY-
_top+func_offset
CALL-OUT DISPATCH
Figure C-3. Module Call-In, Call-Out Example
FROM THE LABEL _top
MODULE FUNCTIONS
ARE FIXED OFFSETS
POINT SECTION
_top
M68060 USER’S MANUAL
f1: Actual func code
L1:
L2:
Call-Out Dispatch
ENTRY-POINT DISPATCH SECTION
*Do a call-out
lea
add.1 L1,A0
jsr
next instruction
_call_out - _top
_done
lea
add.1 L2,A0
jmp
Table Size
128 bytes
128 bytes
128 bytes
CALL-OUT DISPATCH TABLE
bra f1
0 bytes
0 bytes
CODE SECTION
MODULE
_top,A0
(a0)
_top,A0
(a0)
- _top
Entry-Point + Code
56K-128 bytes
35K-128 bytes
Section Size
8K-128 bytes
34K bytes
4K bytes
_call_out: call_out code here
THE ENTRY-POINT AND CODE
PSEUDO-ASSEMBLY FILE
SECTIONS ARE INTHE
OPERATING SYSTEM-SUPPLIED CODE
rts
Total Module
56K bytes
34K bytes
35K bytes
8K bytes
4K bytes
Size
MOTOROLA