IBM 5150 Technical Reference page 231

Footnotes:
STIO) = Current Stack top
STIiI = i'h register below stack top
d = Destination
o -
Destination is ST(O)
1 - Destination is STIiI
P= P OP
0- No pop
1 - PopST(O)
R= Reverse
o -
Destination (op) Source
1 - Source (op) Destination
For FSQRT: -O:5ST(O):5 + 00
For FSCAlE: - 2
'5
:5ST(1)< + 2
'5
and ST(1) integer
For F2XM1:
0:5ST(0):52-
1
For FYL2X: O<ST(O)<oo
- 00 < ST( 1) < + 00
For FYL2XP1: 0< IST(O)I < (2 - ../2)/2
-00<ST(1)<00
For FPTAN:
OsST(0)<n/4
For
FPATAN:
0:5ST(0)<ST(1)< +00
6-24 Instruction Set