+++ /dev/null
-/////////////////////////////////////////////////////////////////
-// ScoreType.h
-//
-// Routines for doing math operations in PROBCONS.
-/////////////////////////////////////////////////////////////////
-
-#ifndef SCORETYPE_H
-#define SCORETYPE_H
-
-#include <cmath>
-#include <algorithm>
-#include <cfloat>
-
-typedef float ScoreType;
-
-const float LOG_ZERO = -2e20;
-const float LOG_ONE = 0.0;
-
-/////////////////////////////////////////////////////////////////
-// LOG()
-//
-// Compute the logarithm of x.
-/////////////////////////////////////////////////////////////////
-
-inline ScoreType LOG (ScoreType x){
- return log (x);
-}
-
-/////////////////////////////////////////////////////////////////
-// EXP()
-//
-// Computes exp(x).
-/////////////////////////////////////////////////////////////////
-
-inline ScoreType EXP (ScoreType x){
- //return exp(x);
- if (x > -2){
- if (x > -0.5){
- if (x > 0)
- return exp(x);
- return (((0.03254409303190190000*x + 0.16280432765779600000)*x + 0.49929760485974900000)*x + 0.99995149601363700000)*x + 0.99999925508501600000;
- }
- if (x > -1)
- return (((0.01973899026052090000*x + 0.13822379685007000000)*x + 0.48056651562365000000)*x + 0.99326940370383500000)*x + 0.99906756856399500000;
- return (((0.00940528203591384000*x + 0.09414963667859410000)*x + 0.40825793595877300000)*x + 0.93933625499130400000)*x + 0.98369508190545300000;
- }
- if (x > -8){
- if (x > -4)
- return (((0.00217245711583303000*x + 0.03484829428350620000)*x + 0.22118199801337800000)*x + 0.67049462206469500000)*x + 0.83556950223398500000;
- return (((0.00012398771025456900*x + 0.00349155785951272000)*x + 0.03727721426017900000)*x + 0.17974997741536900000)*x + 0.33249299994217400000;
- }
- if (x > -16)
- return (((0.00000051741713416603*x + 0.00002721456879608080)*x + 0.00053418601865636800)*x + 0.00464101989351936000)*x + 0.01507447981459420000;
- return 0;
-}
-
-/*
-/////////////////////////////////////////////////////////////////
-// LOOKUP()
-//
-// Computes log (exp (x) + 1), for 0 <= x <= 7.5.
-/////////////////////////////////////////////////////////////////
-
-inline ScoreType LOOKUP (ScoreType x){
- //return log (exp(x) + 1);
- if (x < 2){
- if (x < 0.5){
- if (x < 0)
- return log (exp(x) + 1);
- return (((-0.00486373205785640000*x - 0.00020245408813934800)*x + 0.12504222666029800000)*x + 0.49999685320563000000)*x + 0.69314723138948900000;
- }
- if (x < 1)
- return (((-0.00278634205460548000*x - 0.00458097251248546000)*x + 0.12865849880472500000)*x + 0.49862228499205200000)*x + 0.69334810088688000000;
- return (((0.00059633755154209200*x - 0.01918996666063320000)*x + 0.15288232492093800000)*x + 0.48039958825756900000)*x + 0.69857578503189200000;
- }
- if (x < 8){
- if (x < 4)
- return (((0.00135958539181047000*x - 0.02329807659316430000)*x + 0.15885799609532100000)*x + 0.48167498563270800000)*x + 0.69276185058669200000;
- return (((0.00011992394456683500*x - 0.00338464503306568000)*x + 0.03622746366545470000)*x + 0.82481250248383700000)*x + 0.32507892994863100000;
- }
- if (x < 16)
- return (((0.00000051726300753785*x - 0.00002720671238876090)*x + 0.00053403733818413500)*x + 0.99536021775747900000)*x + 0.01507065715532010000;
- return x;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOOKUP_SLOW()
-//
-// Computes log (exp (x) + 1).
-/////////////////////////////////////////////////////////////////
-
-inline ScoreType LOOKUP_SLOW (ScoreType x){
- return log (exp (x) + 1);
-}
-
-/////////////////////////////////////////////////////////////////
-// MAX()
-//
-// Compute max of three numbers
-/////////////////////////////////////////////////////////////////
-
-inline ScoreType MAX (ScoreType x, ScoreType y, ScoreType z){
- if (x >= y){
- if (x >= z)
- return x;
- return z;
- }
- if (y >= z)
- return y;
- return z;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_PLUS_EQUALS()
-//
-// Add two log probabilities and store in the first argument
-/////////////////////////////////////////////////////////////////
-
-inline void LOG_PLUS_EQUALS (ScoreType &x, ScoreType y){
- if (x < y)
- x = (x <= LOG_ZERO) ? y : LOOKUP(y-x) + x;
- else
- x = (y <= LOG_ZERO) ? x : LOOKUP(x-y) + y;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_PLUS_EQUALS_SLOW()
-//
-// Add two log probabilities and store in the first argument
-/////////////////////////////////////////////////////////////////
-
-inline void LOG_PLUS_EQUALS_SLOW (ScoreType &x, ScoreType y){
- if (x < y)
- x = (x <= LOG_ZERO) ? y : LOOKUP_SLOW(y-x) + x;
- else
- x = (y <= LOG_ZERO) ? x : LOOKUP_SLOW(x-y) + y;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_ADD()
-//
-// Add two log probabilities
-/////////////////////////////////////////////////////////////////
-
-inline ScoreType LOG_ADD (ScoreType x, ScoreType y){
- if (x < y) return (x <= LOG_ZERO) ? y : LOOKUP(y-x) + x;
- return (y <= LOG_ZERO) ? x : LOOKUP(x-y) + y;
-}
-*/
-
-/*
-/////////////////////////////////////////////////////////////////
-// LOG()
-//
-// Compute the logarithm of x.
-/////////////////////////////////////////////////////////////////
-
-inline float LOG (float x){
- return log (x);
-}
-
-/////////////////////////////////////////////////////////////////
-// EXP()
-//
-// Computes exp(x), fr -4.6 <= x <= 0.
-/////////////////////////////////////////////////////////////////
-
-inline float EXP (float x){
- assert (x <= 0.00f);
- if (x < EXP_UNDERFLOW_THRESHOLD) return 0.0f;
- return (((0.006349841068584 * x + 0.080775412572352) * x + 0.397982026296272) * x + 0.95279335963787f) * x + 0.995176455837312f;
- //return (((0.00681169825657f * x + 0.08386267698832f) * x + 0.40413983195844f) * x + 0.95656674979767f) * x + 0.99556744049130f;
-}
-*/
-
-const float EXP_UNDERFLOW_THRESHOLD = -4.6;
-const float LOG_UNDERFLOW_THRESHOLD = 7.5;
-
-/////////////////////////////////////////////////////////////////
-// LOOKUP()
-//
-// Computes log (exp (x) + 1), for 0 <= x <= 7.5.
-/////////////////////////////////////////////////////////////////
-
-inline float LOOKUP (float x){
- assert (x >= 0.00f);
- assert (x <= LOG_UNDERFLOW_THRESHOLD);
- //return ((-0.00653779113685f * x + 0.09537236626558f) * x + 0.55317574459331f) * x + 0.68672959851568f;
- if (x <= 1.00f) return ((-0.009350833524763f * x + 0.130659527668286f) * x + 0.498799810682272f) * x + 0.693203116424741f;
- if (x <= 2.50f) return ((-0.014532321752540f * x + 0.139942324101744f) * x + 0.495635523139337f) * x + 0.692140569840976f;
- if (x <= 4.50f) return ((-0.004605031767994f * x + 0.063427417320019f) * x + 0.695956496475118f) * x + 0.514272634594009f;
- assert (x <= LOG_UNDERFLOW_THRESHOLD);
- return ((-0.000458661602210f * x + 0.009695946122598f) * x + 0.930734667215156f) * x + 0.168037164329057f;
-
- //return (((0.00089738532761f * x - 0.01859488697982f) * x + 0.14415772028626f) * x + 0.49515490689159f) * x + 0.69311928966454f;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOOKUP_SLOW()
-//
-// Computes log (exp (x) + 1).
-/////////////////////////////////////////////////////////////////
-
-inline float LOOKUP_SLOW (float x){
- return log (exp (x) + 1);
-}
-
-/////////////////////////////////////////////////////////////////
-// MAX()
-//
-// Compute max of three numbers
-/////////////////////////////////////////////////////////////////
-
-inline float MAX (float x, float y, float z){
- if (x >= y){
- if (x >= z)
- return x;
- return z;
- }
- if (y >= z)
- return y;
- return z;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_PLUS_EQUALS()
-//
-// Add two log probabilities and store in the first argument
-/////////////////////////////////////////////////////////////////
-
-inline void LOG_PLUS_EQUALS (float &x, float y){
- if (x < y)
- x = (x == LOG_ZERO || y - x >= LOG_UNDERFLOW_THRESHOLD) ? y : LOOKUP(y-x) + x;
- else
- x = (y == LOG_ZERO || x - y >= LOG_UNDERFLOW_THRESHOLD) ? x : LOOKUP(x-y) + y;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_PLUS_EQUALS_SLOW()
-//
-// Add two log probabilities and store in the first argument
-/////////////////////////////////////////////////////////////////
-
-inline void LOG_PLUS_EQUALS_SLOW (float &x, float y){
- if (x < y)
- x = (x == LOG_ZERO) ? y : LOOKUP_SLOW(y-x) + x;
- else
- x = (y == LOG_ZERO) ? x : LOOKUP_SLOW(x-y) + y;
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_ADD()
-//
-// Add two log probabilities
-/////////////////////////////////////////////////////////////////
-
-inline float LOG_ADD (float x, float y){
- if (x < y) return (x == LOG_ZERO || y - x >= LOG_UNDERFLOW_THRESHOLD) ? y : LOOKUP(y-x) + x;
- return (y == LOG_ZERO || x - y >= LOG_UNDERFLOW_THRESHOLD) ? x : LOOKUP(x-y) + y;
-}
-
-
-/////////////////////////////////////////////////////////////////
-// LOG_ADD()
-//
-// Add three log probabilities
-/////////////////////////////////////////////////////////////////
-
-inline float LOG_ADD (float x1, float x2, float x3){
- return LOG_ADD (x1, LOG_ADD (x2, x3));
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_ADD()
-//
-// Add four log probabilities
-/////////////////////////////////////////////////////////////////
-
-inline float LOG_ADD (float x1, float x2, float x3, float x4){
- return LOG_ADD (x1, LOG_ADD (x2, LOG_ADD (x3, x4)));
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_ADD()
-//
-// Add five log probabilities
-/////////////////////////////////////////////////////////////////
-
-inline float LOG_ADD (float x1, float x2, float x3, float x4, float x5){
- return LOG_ADD (x1, LOG_ADD (x2, LOG_ADD (x3, LOG_ADD (x4, x5))));
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_ADD()
-//
-// Add siz log probabilities
-/////////////////////////////////////////////////////////////////
-
-inline float LOG_ADD (float x1, float x2, float x3, float x4, float x5, float x6){
- return LOG_ADD (x1, LOG_ADD (x2, LOG_ADD (x3, LOG_ADD (x4, LOG_ADD (x5, x6)))));
-}
-
-/////////////////////////////////////////////////////////////////
-// LOG_ADD()
-//
-// Add seven log probabilities
-/////////////////////////////////////////////////////////////////
-
-inline float LOG_ADD (float x1, float x2, float x3, float x4, float x5, float x6, float x7){
- return LOG_ADD (x1, LOG_ADD (x2, LOG_ADD (x3, LOG_ADD (x4, LOG_ADD (x5, LOG_ADD (x6, x7))))));
-}
-
-/////////////////////////////////////////////////////////////////
-// ChooseBestOfThree()
-//
-// Store the largest of three values x1, x2, and x3 in *x. Also
-// if xi is the largest value, then store bi in *b.
-/////////////////////////////////////////////////////////////////
-
-inline void ChooseBestOfThree (float x1, float x2, float x3, char b1, char b2, char b3, float *x, char *b){
- if (x1 >= x2){
- if (x1 >= x3){
- *x = x1;
- *b = b1;
- return;
- }
- *x = x3;
- *b = b3;
- return;
- }
- if (x2 >= x3){
- *x = x2;
- *b = b2;
- return;
- }
- *x = x3;
- *b = b3;
-}
-
-#endif
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