Stereo System User Manual

A - 152 DSP96002 USER’S MANUAL MOTOROLA
FMPY.S Floating-Point Multiply FMPY.S
Operation:
S1
*
S2 → ROUND(SP) → D
(parallel data bus move)
S1
*
S2 → ROUND(SP) → D
(parallel data bus move)
Assembler Syntax:
FMPY.S S1,S2,D
(move syntax - see the MOVE instruction de-
scription.)
FMPY.S S2,S1,D
(move syntax - see the MOVE instruction de-
scription.)
Description:
Multiply the two specified operands S1 and S2, round to single precision and store the result in the desti-
nation operand D.
Input Operand(s) Precision: SEP Floating-Point.
Output Operand Precision: SP Floating-Point.
CCR Condition Codes:
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 -Set if result is inexact. Cleared otherwise.
DZ -Always cleared.
UNF -Set if result underflows. Cleared otherwise.
OVF -Set if result overflows. Cleared otherwise.
OPERR-Set if one operand is infinity and the other zero. Cleared otherwise.
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.