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9- 44 M68040 USER’S MANUAL MOTOROLA
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
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