Tfrc, Conditionally transfer data register, Example – Freescale Semiconductor StarCore SC140 User Manual
Page 724: Operation assembler syntax
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SC140 DSP Core Reference Manual
TFRc
TFRc
Conditionally Transfer Data Register
TFRc
to Data Register (DALU)
Description
Status and Conditions that Affect Instruction
Status and Conditions Changed by Instruction
Note:
The Ln bit is re-calculated (not copied) in the destination register. Saturation mode is ignored and
no saturation is done.
Example
tfrt d14,d15
Operation
Assembler Syntax
If T=1, then Da
→ Dn
TFRT Da,Dn
If T=0, then Da
→ Dn
TFRF Da,Dn
TFRT Da, Dn
Copies a source data register (Da) to a destination data register (Dn) if the T bit is set.
TFRF Da, Dn
Copies a source data register (Da) to a destination data register (Dn) if the T bit is cleared.
Register Address
Bit Name
Description
SR[1]
T
True bit
SR[5:4]
S[1:0]
Scaling bits determine which bits in the result are used in the Ln bit
calculation.
Register Address
Bit Name
Description
Ln
L
Calculates and updates the Ln bit in the destination register.
Register/Memory Address
Before
After
SR
$00E4 0002
D14
$FF F23A 1422
L15:D15
$0:$FF F23A 1422