13ebdd119Saurel32 /* 23ebdd119Saurel32 NetWinder Floating Point Emulator 33ebdd119Saurel32 (c) Rebel.COM, 1998,1999 43ebdd119Saurel32 53ebdd119Saurel32 Direct questions, comments to Scott Bambrough <scottb@netwinder.org> 63ebdd119Saurel32 73ebdd119Saurel32 This program is free software; you can redistribute it and/or modify 83ebdd119Saurel32 it under the terms of the GNU General Public License as published by 93ebdd119Saurel32 the Free Software Foundation; either version 2 of the License, or 103ebdd119Saurel32 (at your option) any later version. 113ebdd119Saurel32 123ebdd119Saurel32 This program is distributed in the hope that it will be useful, 133ebdd119Saurel32 but WITHOUT ANY WARRANTY; without even the implied warranty of 143ebdd119Saurel32 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 153ebdd119Saurel32 GNU General Public License for more details. 163ebdd119Saurel32 173ebdd119Saurel32 You should have received a copy of the GNU General Public License 18*70539e18SBlue Swirl along with this program; if not, see <http://www.gnu.org/licenses/>. 193ebdd119Saurel32 */ 203ebdd119Saurel32 213ebdd119Saurel32 #include "fpa11.h" 223ebdd119Saurel32 #include "softfloat.h" 233ebdd119Saurel32 #include "fpopcode.h" 243ebdd119Saurel32 #include "fpsr.h" 253ebdd119Saurel32 //#include "fpmodule.h" 263ebdd119Saurel32 //#include "fpmodule.inl" 273ebdd119Saurel32 283ebdd119Saurel32 const floatx80 floatx80Constant[] = { 293ebdd119Saurel32 { 0x0000000000000000ULL, 0x0000}, /* extended 0.0 */ 303ebdd119Saurel32 { 0x8000000000000000ULL, 0x3fff}, /* extended 1.0 */ 313ebdd119Saurel32 { 0x8000000000000000ULL, 0x4000}, /* extended 2.0 */ 323ebdd119Saurel32 { 0xc000000000000000ULL, 0x4000}, /* extended 3.0 */ 333ebdd119Saurel32 { 0x8000000000000000ULL, 0x4001}, /* extended 4.0 */ 343ebdd119Saurel32 { 0xa000000000000000ULL, 0x4001}, /* extended 5.0 */ 353ebdd119Saurel32 { 0x8000000000000000ULL, 0x3ffe}, /* extended 0.5 */ 363ebdd119Saurel32 { 0xa000000000000000ULL, 0x4002} /* extended 10.0 */ 373ebdd119Saurel32 }; 383ebdd119Saurel32 393ebdd119Saurel32 const float64 float64Constant[] = { 403ebdd119Saurel32 0x0000000000000000ULL, /* double 0.0 */ 413ebdd119Saurel32 0x3ff0000000000000ULL, /* double 1.0 */ 423ebdd119Saurel32 0x4000000000000000ULL, /* double 2.0 */ 433ebdd119Saurel32 0x4008000000000000ULL, /* double 3.0 */ 443ebdd119Saurel32 0x4010000000000000ULL, /* double 4.0 */ 453ebdd119Saurel32 0x4014000000000000ULL, /* double 5.0 */ 463ebdd119Saurel32 0x3fe0000000000000ULL, /* double 0.5 */ 473ebdd119Saurel32 0x4024000000000000ULL /* double 10.0 */ 483ebdd119Saurel32 }; 493ebdd119Saurel32 503ebdd119Saurel32 const float32 float32Constant[] = { 513ebdd119Saurel32 0x00000000, /* single 0.0 */ 523ebdd119Saurel32 0x3f800000, /* single 1.0 */ 533ebdd119Saurel32 0x40000000, /* single 2.0 */ 543ebdd119Saurel32 0x40400000, /* single 3.0 */ 553ebdd119Saurel32 0x40800000, /* single 4.0 */ 563ebdd119Saurel32 0x40a00000, /* single 5.0 */ 573ebdd119Saurel32 0x3f000000, /* single 0.5 */ 583ebdd119Saurel32 0x41200000 /* single 10.0 */ 593ebdd119Saurel32 }; 603ebdd119Saurel32 613ebdd119Saurel32 unsigned int getRegisterCount(const unsigned int opcode) 623ebdd119Saurel32 { 633ebdd119Saurel32 unsigned int nRc; 643ebdd119Saurel32 653ebdd119Saurel32 switch (opcode & MASK_REGISTER_COUNT) 663ebdd119Saurel32 { 673ebdd119Saurel32 case 0x00000000: nRc = 4; break; 683ebdd119Saurel32 case 0x00008000: nRc = 1; break; 693ebdd119Saurel32 case 0x00400000: nRc = 2; break; 703ebdd119Saurel32 case 0x00408000: nRc = 3; break; 713ebdd119Saurel32 default: nRc = 0; 723ebdd119Saurel32 } 733ebdd119Saurel32 743ebdd119Saurel32 return(nRc); 753ebdd119Saurel32 } 763ebdd119Saurel32 773ebdd119Saurel32 unsigned int getDestinationSize(const unsigned int opcode) 783ebdd119Saurel32 { 793ebdd119Saurel32 unsigned int nRc; 803ebdd119Saurel32 813ebdd119Saurel32 switch (opcode & MASK_DESTINATION_SIZE) 823ebdd119Saurel32 { 833ebdd119Saurel32 case 0x00000000: nRc = typeSingle; break; 843ebdd119Saurel32 case 0x00000080: nRc = typeDouble; break; 853ebdd119Saurel32 case 0x00080000: nRc = typeExtended; break; 863ebdd119Saurel32 default: nRc = typeNone; 873ebdd119Saurel32 } 883ebdd119Saurel32 893ebdd119Saurel32 return(nRc); 903ebdd119Saurel32 } 913ebdd119Saurel32 923ebdd119Saurel32 /* condition code lookup table 933ebdd119Saurel32 index into the table is test code: EQ, NE, ... LT, GT, AL, NV 943ebdd119Saurel32 bit position in short is condition code: NZCV */ 953ebdd119Saurel32 static const unsigned short aCC[16] = { 963ebdd119Saurel32 0xF0F0, // EQ == Z set 973ebdd119Saurel32 0x0F0F, // NE 983ebdd119Saurel32 0xCCCC, // CS == C set 993ebdd119Saurel32 0x3333, // CC 1003ebdd119Saurel32 0xFF00, // MI == N set 1013ebdd119Saurel32 0x00FF, // PL 1023ebdd119Saurel32 0xAAAA, // VS == V set 1033ebdd119Saurel32 0x5555, // VC 1043ebdd119Saurel32 0x0C0C, // HI == C set && Z clear 1053ebdd119Saurel32 0xF3F3, // LS == C clear || Z set 1063ebdd119Saurel32 0xAA55, // GE == (N==V) 1073ebdd119Saurel32 0x55AA, // LT == (N!=V) 1083ebdd119Saurel32 0x0A05, // GT == (!Z && (N==V)) 1093ebdd119Saurel32 0xF5FA, // LE == (Z || (N!=V)) 1103ebdd119Saurel32 0xFFFF, // AL always 1113ebdd119Saurel32 0 // NV 1123ebdd119Saurel32 }; 113