Freescale Semiconductor StarCore SC140 - Manual (Page 249)

Programming Rules
SC140 DSP Core Reference Manual 6-69
6.8.4 Sequencing rules for T bit update
The ISAP has the ability to change the T bit as a destination of it’s instructions. The ISAP is less tightly
coupled with the core, hence there the required dependency distance between The update of the T bit by
the ISAP and usage by conditional core instructions is larger for non-DALU instructions.
T.2a: One VLES required between an ISAP instruction that updates the T bit and a conditional COF
instruction
T.2b: 2 VLES required between an ISAP instruction that updates the T bit and a MOVET/F instruction
T.2c: 2 VLES required between an ISAP instruction that updates the T bit and an AGU instruction
conditioned by IFT/F.
In addition, ISAP instructions that change the T bit or depend on it (via IFc) are subject to the same rules as
are other core instructions:
T.1, D.2, D.3.