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Small cleanups (2)

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- fix a small compile error under MSVC
- improve sigmoid comment and assert
- fix formatting in README.md

closes https://github.com/official-stockfish/Stockfish/pull/3960

No functional change
This commit is contained in:
mstembera
2022-03-12 07:00:58 -08:00
committed by Stéphane Nicolet
parent 004ea2c25e
commit f3a2296e59
3 changed files with 44 additions and 36 deletions
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5
src/misc.h
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@@ -152,7 +152,7 @@ private:
/// - the slope can be adjusted using C > 0, smaller C giving a steeper sigmoid
/// - the slope of the sigmoid when t = x0 is P/(Q*C)
/// - sigmoid is increasing with t when P > 0 and Q > 0
/// - to get a decreasing sigmoid, call with -t, or change sign of P
/// - to get a decreasing sigmoid, change sign of P
/// - mean value of the sigmoid is y0
///
/// Use <https://www.desmos.com/calculator/jhh83sqq92> to draw the sigmoid
@@ -163,7 +163,8 @@ inline int64_t sigmoid(int64_t t, int64_t x0,
int64_t P,
int64_t Q)
{
assert(C > 0 && Q != 0);
assert(C > 0);
assert(Q != 0);
return y0 + P * (t-x0) / (Q * (std::abs(t-x0) + C)) ;
}

4
src/movepick.cpp
View File

@@ -107,8 +107,8 @@ void MovePicker::score() {
for (auto& m : *this)
if constexpr (Type == CAPTURES)
m.value = 6 * PieceValue[MG][pos.piece_on(to_sq(m))]
+ (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))];
m.value = 6 * int(PieceValue[MG][pos.piece_on(to_sq(m))])
+ (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))];
else if constexpr (Type == QUIETS)
m.value = (*mainHistory)[pos.side_to_move()][from_to(m)]