Motorola DSP96002 - Manual (Page 366)

A - 178 DSP96002 USER’S MANUAL MOTOROLA
FTST Test a Floating-Point Operand FTST
Operation:
S - 0 (parallel data bus move)
Assembler Syntax:
FTST S
(move syntax - see the Move instruction description.)
Description:
Compare the specified operand with zero. No result is stored, however, the condition codes are affected
as described.
Input Operand(s) Precision: SEP Floating-Point.
Output Operand Precision: n.a.
CCR Condition Codes:
Note: Since there is no destination, there is no rounding and therefore the condition code bits are set as-
suming an infinite precision result.
C - Not affected.
V - Not affected.
Z - Set if result is zero. Cleared otherwise.
N - Set if result is negative. Cleared otherwise.
I - Set if result is infinity. Cleared otherwise.
LR - Not affected.
–
R - Not affected.
A - Not affected.
ER Status Bits:
INX -Always cleared.
DZ -Always cleared.
UNF -Always cleared.
OVF -Always cleared.
OPERR-Always cleared.
SNAN -Set if operand is a signaling NaN. Cleared otherwise.
NAN -Set if result is a NaN. Cleared otherwise.
UNCC -Always cleared.
IER Flags: Flags changed according to standard definition.