309
OF (A50009): OFF when the computation is executed.
UF (A50010): OFF when the computation is executed.
5-21-15 COSINE TO ANGLE: ACOS(464)
(464)
ACOS S R
Ladder Symbol
Variations
↑ACOS(464)
Operand Data Areas
S: First source word CIO, G, A, T, C, #, DM
R: First result word CIO, G, A, DM
When the execution condition OFF, ACOS(464) is not executed. When the
execution condition is ON, ACOS(464) computes the angle (in radians) for a co-
sine expressed as the 32-floating-point content of S and S+1, and places the
result in R and R+1.
R+1 R
S Source (floating-point data, 32 bits)
S+1
Result (floating-point data, 32 bits)
COS
–1
The result is output to words R+1 and R as an angle (in radians) within the range
of 0 to π.
Relation Between Input Data and Result
S: Input data (cosine)
R: Result (radians)
R
Precautions The cosine must be floating-point data within the range of –1.0 to 1.0.
Note Refer to page 115 for general precautions on operand data areas.
Flags ER (A50003): The cosine data is not within the range of –1.0 to 1.0.
The cosine data is not floating-point data.
The content of a*DM word is not BCD when set for BCD.
EQ (A50006): The exponent and mantissa of the result are 0.
N (A50008): OFF when the computation is executed.
OF (A50009): OFF when the computation is executed.
UF (A50010): OFF when the computation is executed.
Description
(CVM1 V2)
Floating-point Math Instructions
Section 5-21
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