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Add floating point constants for FOUT

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Rikard Nordgren authored and FeralChild64 committed 2026-04-12 13:13:18 +02:00
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commit abd67c40f9
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tools/generate_constants.cc
+5
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@@ -58,6 +58,11 @@ std::vector<ConstEntry> GLOBAL_constants =
ConstEntry( "LOG_2", std::log(2.0) ),
ConstEntry( "INV_LOG_2", 1.0 / std::log(2.0) ),
// Constants for FOUT
ConstEntry( "NZ0999", 99999999.9 ), // Comment in MS-BASIC says 99999999.9499, but that is off by one ulp
ConstEntry( "NZ9999", 999999999.2 ), // Comment is MS-BASIC says 999999999.499, but that is off by one ulp
ConstEntry( "NZMIL", 1e9 ),
// Constants for exp approximation, taken from https://www.c64-wiki.com/wiki/POLY1
// original source is probably "Computer Approximations" by John Fraser Hart et al. (ISBN 0-88275-642-7)
ConstEntry( "POLY_EXP_1", 2.1498763701e-5 ),