Mercurial > hg > CbC > CbC_gcc

comparison gcc/config/fp-bit.c @ 67:f6334be47118

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
date Tue, 22 Mar 2011 17:18:12 +0900
parents a06113de4d67
children
comparison
equal deleted inserted replaced
65:65488c3d617d 67:f6334be47118
1 /* This is a software floating point library which can be used 1 /* This is a software floating point library which can be used
2 for targets without hardware floating point. 2 for targets without hardware floating point.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003,
4 2004, 2005, 2008, 2009 Free Software Foundation, Inc. 4 2004, 2005, 2008, 2009, 2010 Free Software Foundation, Inc.
5 5
6 This file is part of GCC. 6 This file is part of GCC.
7 7
8 GCC is free software; you can redistribute it and/or modify it under 8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free 9 the terms of the GNU General Public License as published by the Free
46 don't include float->double conversion which requires the double library. 46 don't include float->double conversion which requires the double library.
47 This is useful only for machines which can't support doubles, e.g. some 47 This is useful only for machines which can't support doubles, e.g. some
48 8-bit processors. 48 8-bit processors.
49 CMPtype: Specify the type that floating point compares should return. 49 CMPtype: Specify the type that floating point compares should return.
50 This defaults to SItype, aka int. 50 This defaults to SItype, aka int.
51 US_SOFTWARE_GOFAST: This makes all entry points use the same names as the
52 US Software goFast library.
53 _DEBUG_BITFLOAT: This makes debugging the code a little easier, by adding 51 _DEBUG_BITFLOAT: This makes debugging the code a little easier, by adding
54 two integers to the FLO_union_type. 52 two integers to the FLO_union_type.
55 NO_DENORMALS: Disable handling of denormals. 53 NO_DENORMALS: Disable handling of denormals.
56 NO_NANS: Disable nan and infinity handling 54 NO_NANS: Disable nan and infinity handling
57 SMALL_MACHINE: Useful when operations on QIs and HIs are faster 55 SMALL_MACHINE: Useful when operations on QIs and HIs are faster
1177 1175
1178 return __fpcmp_parts (&a, &b); 1176 return __fpcmp_parts (&a, &b);
1179 } 1177 }
1180 #endif /* L_compare_sf || L_compare_df */ 1178 #endif /* L_compare_sf || L_compare_df */
1181 1179
1182 #ifndef US_SOFTWARE_GOFAST
1183
1184 /* These should be optimized for their specific tasks someday. */ 1180 /* These should be optimized for their specific tasks someday. */
1185 1181
1186 #if defined(L_eq_sf) || defined(L_eq_df) || defined(L_eq_tf) 1182 #if defined(L_eq_sf) || defined(L_eq_df) || defined(L_eq_tf)
1187 CMPtype 1183 CMPtype
1188 _eq_f2 (FLO_type arg_a, FLO_type arg_b) 1184 _eq_f2 (FLO_type arg_a, FLO_type arg_b)
1305 return 1; /* false, truth <= 0 */ 1301 return 1; /* false, truth <= 0 */
1306 1302
1307 return __fpcmp_parts (&a, &b) ; 1303 return __fpcmp_parts (&a, &b) ;
1308 } 1304 }
1309 #endif /* L_le_sf || L_le_df */ 1305 #endif /* L_le_sf || L_le_df */
1310
1311 #endif /* ! US_SOFTWARE_GOFAST */
1312 1306
1313 #if defined(L_unord_sf) || defined(L_unord_df) || defined(L_unord_tf) 1307 #if defined(L_unord_sf) || defined(L_unord_df) || defined(L_unord_tf)
1314 CMPtype 1308 CMPtype
1315 _unord_f2 (FLO_type arg_a, FLO_type arg_b) 1309 _unord_f2 (FLO_type arg_a, FLO_type arg_b)
1316 { 1310 {
1432 tmp = a.fraction.ll >> ((FRACBITS + NGARDS) - a.normal_exp); 1426 tmp = a.fraction.ll >> ((FRACBITS + NGARDS) - a.normal_exp);
1433 return a.sign ? (-tmp) : (tmp); 1427 return a.sign ? (-tmp) : (tmp);
1434 } 1428 }
1435 #endif /* L_sf_to_si || L_df_to_si */ 1429 #endif /* L_sf_to_si || L_df_to_si */
1436 1430
1437 #if defined(L_sf_to_usi) || defined(L_df_to_usi) || defined(L_tf_to_usi) 1431 #if defined(L_tf_to_usi)
1438 #if defined US_SOFTWARE_GOFAST || defined(L_tf_to_usi)
1439 /* While libgcc2.c defines its own __fixunssfsi and __fixunsdfsi routines,
1440 we also define them for GOFAST because the ones in libgcc2.c have the
1441 wrong names and I'd rather define these here and keep GOFAST CYG-LOC's
1442 out of libgcc2.c. We can't define these here if not GOFAST because then
1443 there'd be duplicate copies. */
1444
1445 USItype 1432 USItype
1446 float_to_usi (FLO_type arg_a) 1433 float_to_usi (FLO_type arg_a)
1447 { 1434 {
1448 fp_number_type a; 1435 fp_number_type a;
1449 FLO_union_type au; 1436 FLO_union_type au;
1469 else if (a.normal_exp > (FRACBITS + NGARDS)) 1456 else if (a.normal_exp > (FRACBITS + NGARDS))
1470 return a.fraction.ll << (a.normal_exp - (FRACBITS + NGARDS)); 1457 return a.fraction.ll << (a.normal_exp - (FRACBITS + NGARDS));
1471 else 1458 else
1472 return a.fraction.ll >> ((FRACBITS + NGARDS) - a.normal_exp); 1459 return a.fraction.ll >> ((FRACBITS + NGARDS) - a.normal_exp);
1473 } 1460 }
1474 #endif /* US_SOFTWARE_GOFAST */ 1461 #endif /* L_tf_to_usi */
1475 #endif /* L_sf_to_usi || L_df_to_usi */
1476 1462
1477 #if defined(L_negate_sf) || defined(L_negate_df) || defined(L_negate_tf) 1463 #if defined(L_negate_sf) || defined(L_negate_df) || defined(L_negate_tf)
1478 FLO_type 1464 FLO_type
1479 negate (FLO_type arg_a) 1465 negate (FLO_type arg_a)
1480 { 1466 {