MC68LC040RC25A Datasheet, PDF (288/442 Pages) Freescale Semiconductor, Inc – M68040 Users Manual

Freescale Semiconductor, Inc.
Table 9-16. State Frame Field Information
FSAVE State
Frame Field
Contents
Unimplemented Instruction Exceptions (For Opclass 000 and 010)
CMDREG1B
Exception Instruction Command Word
ETEMP
Source operand is converted to extended precision. If format is packed, ETM
[63–0] contains bits 63–0 of the packed decimal operand.
STAG
Source operand tag (undefined if format is packed).
FPTEMP
Destination operand, if any, is converted to extended precision. If format is
packed, FPTM [31–0] contains bits 95–64 of the packed decimal operand.
DTAG
Destination operand tag, if any.
E1
Always 1
T
Always 0
Unsupported Data Type (For Opclass 000 and 010)
CMDREG1B
Exception Instruction Command Word
ETEMP
Source operand is converted to extended precision. If format is packed, ETM
[63–0] contains bits 63–0 of the packed decimal operand.
STAG
Source operand tag (undefined if format is packed).
FPTEMP
Destination operand, if any, is converted to extended precision. If format is
packed, FPTM [31–0] contains bits 95–64 of the packed decimal operand.
DTAG
Destination operand tag, if any.
E1
Always 1
T
Always 0
Unsupported Data Type (For Opclass 011)
CMDREG1B
FMOVE Command Word
ETEMP
Unrounded Source Operand from Floating-Point Data Register
STAG
Source Operand Tag
E1
Always 1
T
Always 1
SNAN (For Opclass 000 and 010)
CMDREG1B
Exception Instruction Command Word
ETEMP
Source operand is converted to extended precision.
STAG
Source Operand Tag
FPTEMP
Destination operand, if any, is converted to extended precision.
DTAG
Destination operand tag, if any.
E1
Always 1
T
Always 0
9-44
M68040 USER’S MANUAL
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