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Routines |
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The address of this routine is found in the table of addresses. It is called indirectly via fp_calc_2.
This subroutine handles the function ACS X and returns a real number from 0 to π inclusive which is equal to the value in radians of the angle whose cosine is X.
This subroutine uses the relation ACS X=π/2-ASN X.
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| acs | 14403 | RST 40 | X | |
| 14404 | DEFB 34 | asn: ASN X | ||
| 14405 | DEFB 163 | stk_pi_2: ASN X, π/2 | ||
| 14406 | DEFB 3 | subtract: ASN X-π/2 | ||
| 14407 | DEFB 27 | negate: π/2-ASN X=ACS X | ||
| 14408 | DEFB 56 | end_calc | ||
| 14409 | RET | Finished: 'last value'=ACS X. | ||
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