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Instruction Descriptions 4–75
Table 4–10: Trap Shadow Length Rules
Floating-Point
Instruction Group
Trap Shadow Extends Until Any of the Following
Occurs:
Floating-point operate
(except DIVx and SQRTx)
• Encountering a CALL_PAL, EXCB, or TRAPB
instruction.
• The result is consumed by any instruction except
floating-point STx.
• The fourth instruction
†
after the result is consumed by
a floating-point STx instruction.
Or, following the floating-point STx of the result, the
result of a LDx that loads the stored value is
consumed by any instruction.
• The result of a subsequent floating-point operate
instruction is consumed by any instruction except
floating-point STx.
• The second instruction
†
after the result of a subse-
quent floating-point operate instruction is consumed
by a floating-point STx instruction.
• The result of a subsequent floating-point DIVx or
SQRTx instruction is consumed by any instruction.
Floating-point DIVx
• Encountering a CALL_PAL, EXCB, or TRAPB
instruction.
• The result is consumed by any instruction except
floating-point STx.
• The fourth instruction
†
after the result is consumed by
a floating-point STx instruction.
Or, following the floating-point STx of the result, the
result of a LDx that loads the stored value is
consumed by any instruction.
• The result of a subsequent floating-point DIVx is con-
sumed by any instruction.