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  1. /*
  2.  * Copyright (C) 2005 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include<softfloat.h>
  30. #include<sftypes.h>
  31.  
  32. #include<add.h>
  33. #include<sub.h>
  34. #include<mul.h>
  35. #include<div.h>
  36.  
  37. #include<conversion.h>
  38. #include<comparison.h>
  39. #include<other.h>
  40.  
  41. #include<functions.h>
  42.  
  43. /* Arithmetic functions */
  44.  
  45. float __addsf3(float a, float b)
  46. {
  47.     float32 fa, fb;
  48.     fa.f = a;
  49.     fb.f = b;
  50.     if (fa.parts.sign != fb.parts.sign) {
  51.         if (fa.parts.sign) {
  52.             fa.parts.sign = 0;
  53.             return subFloat32(fb, fa).f;
  54.         };
  55.         fb.parts.sign = 0;
  56.         return subFloat32(fa, fb).f;
  57.     }
  58.     return addFloat32(fa, fb).f;
  59. }
  60.  
  61. double __adddf3(double a, double b)
  62. {
  63.     float64 da, db;
  64.     da.d = a;
  65.     db.d = b;
  66.     if (da.parts.sign != db.parts.sign) {
  67.         if (da.parts.sign) {
  68.             da.parts.sign = 0;
  69.             return subFloat64(db, da).d;
  70.         };
  71.         db.parts.sign = 0;
  72.         return subFloat64(da, db).d;
  73.     }
  74.     return addFloat64(da, db).d;
  75. }
  76.  
  77. float __subsf3(float a, float b)
  78. {
  79.     float32 fa, fb;
  80.     fa.f = a;
  81.     fb.f = b;
  82.     if (fa.parts.sign != fb.parts.sign) {
  83.         fb.parts.sign = !fb.parts.sign;
  84.         return addFloat32(fa, fb).f;
  85.     }
  86.     return subFloat32(fa, fb).f;
  87. }
  88.  
  89. double __subdf3(double a, double b)
  90. {
  91.     float64 da, db;
  92.     da.d = a;
  93.     db.d = b;
  94.     if (da.parts.sign != db.parts.sign) {
  95.         db.parts.sign = !db.parts.sign;
  96.         return addFloat64(da, db).d;
  97.     }
  98.     return subFloat64(da, db).d;
  99. }
  100.  
  101. float __mulsf3(float a, float b)
  102. {
  103.     float32 fa, fb;
  104.     fa.f = a;
  105.     fb.f = b;
  106.     return  mulFloat32(fa, fb).f;
  107. }
  108.  
  109. double __muldf3(double a, double b)
  110. {
  111.     float64 da, db;
  112.     da.d = a;
  113.     db.d = b;
  114.     return  mulFloat64(da, db).d;
  115. }
  116.  
  117. float __divsf3(float a, float b)
  118. {
  119.     float32 fa, fb;
  120.     fa.f = a;
  121.     fb.f = b;
  122.     return  divFloat32(fa, fb).f;
  123. }
  124.  
  125. double __divdf3(double a, double b)
  126. {
  127.     float64 da, db;
  128.     da.d = a;
  129.     db.d = b;
  130.     return  divFloat64(da, db).d;
  131. }
  132.  
  133. float __negsf2(float a)
  134. {
  135.     float32 fa;
  136.     fa.f = a;
  137.     fa.parts.sign = !fa.parts.sign;
  138.     return fa.f;
  139. }
  140.  
  141. double __negdf2(double a)
  142. {
  143.     float64 fa;
  144.     fa.d = a;
  145.     fa.parts.sign = !fa.parts.sign;
  146.     return fa.d;
  147. }
  148.  
  149. /* Conversion functions */
  150.  
  151. double __extendsfdf2(float a)
  152. {
  153.     float32 fa;
  154.     fa.f = a;
  155.     return convertFloat32ToFloat64(fa).d;
  156. }
  157.  
  158. float __truncdfsf2(double a)
  159. {
  160.     float64 da;
  161.     da.d = a;
  162.     return convertFloat64ToFloat32(da).f;
  163. }
  164.  
  165. int __fixsfsi(float a)
  166. {
  167.     float32 fa;
  168.     fa.f = a;
  169.    
  170.     return float32_to_int(fa);
  171. }
  172. int __fixdfsi(double a)
  173. {
  174.     float64 da;
  175.     da.d = a;
  176.    
  177.     return float64_to_int(da);
  178. }
  179.  
  180. long __fixsfdi(float a)
  181. {
  182.     float32 fa;
  183.     fa.f = a;
  184.    
  185.     return float32_to_long(fa);
  186. }
  187. long __fixdfdi(double a)
  188. {
  189.     float64 da;
  190.     da.d = a;
  191.    
  192.     return float64_to_long(da);
  193. }
  194.  
  195. long long __fixsfti(float a)
  196. {
  197.     float32 fa;
  198.     fa.f = a;
  199.    
  200.     return float32_to_longlong(fa);
  201. }
  202. long long __fixdfti(double a)
  203. {
  204.     float64 da;
  205.     da.d = a;
  206.    
  207.     return float64_to_longlong(da);
  208. }
  209.  
  210. unsigned int __fixunssfsi(float a)
  211. {
  212.     float32 fa;
  213.     fa.f = a;
  214.    
  215.     return float32_to_uint(fa);
  216. }
  217. unsigned int __fixunsdfsi(double a)
  218. {
  219.     float64 da;
  220.     da.d = a;
  221.    
  222.     return float64_to_uint(da);
  223. }
  224.  
  225. unsigned long __fixunssfdi(float a)
  226. {
  227.     float32 fa;
  228.     fa.f = a;
  229.    
  230.     return float32_to_ulong(fa);
  231. }
  232. unsigned long __fixunsdfdi(double a)
  233. {
  234.     float64 da;
  235.     da.d = a;
  236.    
  237.     return float64_to_ulong(da);
  238. }
  239.  
  240. unsigned long long __fixunssfti(float a)
  241. {
  242.     float32 fa;
  243.     fa.f = a;
  244.    
  245.     return float32_to_ulonglong(fa);
  246. }
  247. unsigned long long __fixunsdfti(double a)
  248. {
  249.     float64 da;
  250.     da.d = a;
  251.    
  252.     return float64_to_ulonglong(da);
  253. }
  254.  
  255. float __floatsisf(int i)
  256. {
  257.     float32 fa;
  258.    
  259.     fa = int_to_float32(i);
  260.     return fa.f;
  261. }
  262. double __floatsidf(int i)
  263. {
  264.     float64 da;
  265.    
  266.     da = int_to_float64(i);
  267.     return da.d;
  268. }
  269.  
  270. float __floatdisf(long i)
  271. {
  272.     float32 fa;
  273.    
  274.     fa = long_to_float32(i);
  275.     return fa.f;
  276. }
  277. double __floatdidf(long i)
  278. {
  279.     float64 da;
  280.    
  281.     da = long_to_float64(i);
  282.     return da.d;
  283. }
  284.  
  285. float __floattisf(long long i)
  286. {
  287.     float32 fa;
  288.    
  289.     fa = longlong_to_float32(i);
  290.     return fa.f;
  291. }
  292. double __floattidf(long long i)
  293. {
  294.     float64 da;
  295.    
  296.     da = longlong_to_float64(i);
  297.     return da.d;
  298. }
  299.  
  300. float __floatunsisf(unsigned int i)
  301. {
  302.     float32 fa;
  303.    
  304.     fa = uint_to_float32(i);
  305.     return fa.f;
  306. }
  307. double __floatunsidf(unsigned int i)
  308. {
  309.     float64 da;
  310.    
  311.     da = uint_to_float64(i);
  312.     return da.d;
  313. }
  314.  
  315. float __floatundisf(unsigned long i)
  316. {
  317.     float32 fa;
  318.    
  319.     fa = ulong_to_float32(i);
  320.     return fa.f;
  321. }
  322. double __floatundidf(unsigned long i)
  323. {
  324.     float64 da;
  325.    
  326.     da = ulong_to_float64(i);
  327.     return da.d;
  328. }
  329.  
  330. float __floatuntisf(unsigned long long i)
  331. {
  332.     float32 fa;
  333.    
  334.     fa = ulonglong_to_float32(i);
  335.     return fa.f;
  336. }
  337. double __floatuntidf(unsigned long long i)
  338. {
  339.     float64 da;
  340.    
  341.     da = ulonglong_to_float64(i);
  342.     return da.d;
  343. }
  344.  
  345. /* Comparison functions */
  346. /* Comparison functions */
  347.  
  348. /* a<b .. -1
  349.  * a=b ..  0
  350.  * a>b ..  1
  351.  * */
  352.  
  353. int __cmpsf2(float a, float b)
  354. {
  355.     float32 fa, fb;
  356.     fa.f = a;
  357.     fb.f = b;
  358.     if ( (isFloat32NaN(fa)) || (isFloat32NaN(fb)) ) {
  359.         return 1; /* no special constant for unordered - maybe signaled? */
  360.     };
  361.  
  362.    
  363.     if (isFloat32eq(fa, fb)) {
  364.         return 0;
  365.     };
  366.    
  367.     if (isFloat32lt(fa, fb)) {
  368.         return -1;
  369.         };
  370.     return 1;
  371. }
  372.  
  373. int __unordsf2(float a, float b)
  374. {
  375.     float32 fa, fb;
  376.     fa.f = a;
  377.     fb.f = b;
  378.     return ( (isFloat32NaN(fa)) || (isFloat32NaN(fb)) );
  379. }
  380.  
  381. /**
  382.  * @return zero, if neither argument is a NaN and are equal
  383.  * */
  384. int __eqsf2(float a, float b)
  385. {
  386.     float32 fa, fb;
  387.     fa.f = a;
  388.     fb.f = b;
  389.     if ( (isFloat32NaN(fa)) || (isFloat32NaN(fb)) ) {
  390.         /* TODO: sigNaNs*/
  391.         return 1;
  392.         };
  393.     return isFloat32eq(fa, fb) - 1;
  394. }
  395.  
  396. /* strange behavior, but it was in gcc documentation */
  397. int __nesf2(float a, float b)
  398. {
  399.     return __eqsf2(a, b);
  400. }
  401.  
  402. /* return value >= 0 if a>=b and neither is NaN */
  403. int __gesf2(float a, float b)
  404. {
  405.     float32 fa, fb;
  406.     fa.f = a;
  407.     fb.f = b;
  408.     if ( (isFloat32NaN(fa)) || (isFloat32NaN(fb)) ) {
  409.         /* TODO: sigNaNs*/
  410.         return -1;
  411.         };
  412.    
  413.     if (isFloat32eq(fa, fb)) {
  414.         return 0;
  415.     };
  416.    
  417.     if (isFloat32gt(fa, fb)) {
  418.         return 1;
  419.         };
  420.    
  421.     return -1;
  422. }
  423.  
  424. /** Return negative value, if a<b and neither is NaN*/
  425. int __ltsf2(float a, float b)
  426. {
  427.     float32 fa, fb;
  428.     fa.f = a;
  429.     fb.f = b;
  430.     if ( (isFloat32NaN(fa)) || (isFloat32NaN(fb)) ) {
  431.         /* TODO: sigNaNs*/
  432.         return 1;
  433.         };
  434.     if (isFloat32lt(fa, fb)) {
  435.         return -1;
  436.         };
  437.     return 0;
  438. }
  439.  
  440. /* return value <= 0 if a<=b and neither is NaN */
  441. int __lesf2(float a, float b)
  442. {
  443.     float32 fa, fb;
  444.     fa.f = a;
  445.     fb.f = b;
  446.     if ( (isFloat32NaN(fa)) || (isFloat32NaN(fb)) ) {
  447.         /* TODO: sigNaNs*/
  448.         return 1;
  449.         };
  450.    
  451.     if (isFloat32eq(fa, fb)) {
  452.         return 0;
  453.     };
  454.    
  455.     if (isFloat32lt(fa, fb)) {
  456.         return -1;
  457.         };
  458.    
  459.     return 1;
  460. }
  461.  
  462. /** Return positive value, if a>b and neither is NaN*/
  463. int __gtsf2(float a, float b)
  464. {
  465.     float32 fa, fb;
  466.     fa.f = a;
  467.     fb.f = b;
  468.     if ( (isFloat32NaN(fa)) || (isFloat32NaN(fb)) ) {
  469.         /* TODO: sigNaNs*/
  470.         return -1;
  471.         };
  472.     if (isFloat32gt(fa, fb)) {
  473.         return 1;
  474.         };
  475.     return 0;
  476. }
  477.  
  478. /* Other functions */
  479.  
  480. float __powisf2(float a, int b)
  481. {
  482. /* TODO: */
  483.     float32 fa;
  484.     fa.binary = FLOAT32_NAN;
  485.     return fa.f;
  486. }
  487.  
  488.