Motorola DSP96002 - Manual (Page 298)

A - 110 DSP96002 USER’S MANUAL MOTOROLA
FCMPM Compare Magnitude FCMPM
of Two Floating-Point Operands
Operation:
S2 - S1 (parallel data bus move)
Assembler Syntax:
FCMPM S1,S2 (move syntax - see the MOVE in-
struction description.)
Description:
Subtract the absolute value (magnitude) of the two operands as specified in the operation column above.
No result is stored; however, the condition codes are affected as described. This instruction differs from
FSUB when S1=S2; in this case, the result is always +0 and therefore, N is cleared. Note that this is true
even if S1, S2 are infinity.
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 infiite precision result)
C - Not affected.
V - Not affected.
Z - Set if source operands are equal. Cleared otherwise.
N - Set if result is negative. Cleared otherwise.
I - Set if anyone of the operands 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.