| 1 | /* |
| 2 | NetWinder Floating Point Emulator |
| 3 | (c) Rebel.COM, 1998,1999 |
| 4 | |
| 5 | Direct questions, comments to Scott Bambrough <scottb@netwinder.org> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "fpa11.h" |
| 23 | #include "fpu/softfloat.h" |
| 24 | #include "fpopcode.h" |
| 25 | #include "fpsr.h" |
| 26 | //#include "fpmodule.h" |
| 27 | //#include "fpmodule.inl" |
| 28 | |
| 29 | const floatx80 floatx80Constant[] = { |
| 30 | { 0x0000000000000000ULL, 0x0000}, /* extended 0.0 */ |
| 31 | { 0x8000000000000000ULL, 0x3fff}, /* extended 1.0 */ |
| 32 | { 0x8000000000000000ULL, 0x4000}, /* extended 2.0 */ |
| 33 | { 0xc000000000000000ULL, 0x4000}, /* extended 3.0 */ |
| 34 | { 0x8000000000000000ULL, 0x4001}, /* extended 4.0 */ |
| 35 | { 0xa000000000000000ULL, 0x4001}, /* extended 5.0 */ |
| 36 | { 0x8000000000000000ULL, 0x3ffe}, /* extended 0.5 */ |
| 37 | { 0xa000000000000000ULL, 0x4002} /* extended 10.0 */ |
| 38 | }; |
| 39 | |
| 40 | const float64 float64Constant[] = { |
| 41 | const_float64(0x0000000000000000ULL), /* double 0.0 */ |
| 42 | const_float64(0x3ff0000000000000ULL), /* double 1.0 */ |
| 43 | const_float64(0x4000000000000000ULL), /* double 2.0 */ |
| 44 | const_float64(0x4008000000000000ULL), /* double 3.0 */ |
| 45 | const_float64(0x4010000000000000ULL), /* double 4.0 */ |
| 46 | const_float64(0x4014000000000000ULL), /* double 5.0 */ |
| 47 | const_float64(0x3fe0000000000000ULL), /* double 0.5 */ |
| 48 | const_float64(0x4024000000000000ULL) /* double 10.0 */ |
| 49 | }; |
| 50 | |
| 51 | const float32 float32Constant[] = { |
| 52 | const_float32(0x00000000), /* single 0.0 */ |
| 53 | const_float32(0x3f800000), /* single 1.0 */ |
| 54 | const_float32(0x40000000), /* single 2.0 */ |
| 55 | const_float32(0x40400000), /* single 3.0 */ |
| 56 | const_float32(0x40800000), /* single 4.0 */ |
| 57 | const_float32(0x40a00000), /* single 5.0 */ |
| 58 | const_float32(0x3f000000), /* single 0.5 */ |
| 59 | const_float32(0x41200000) /* single 10.0 */ |
| 60 | }; |
| 61 | |
| 62 | unsigned int getRegisterCount(const unsigned int opcode) |
| 63 | { |
| 64 | unsigned int nRc; |
| 65 | |
| 66 | switch (opcode & MASK_REGISTER_COUNT) |
| 67 | { |
| 68 | case 0x00000000: nRc = 4; break; |
| 69 | case 0x00008000: nRc = 1; break; |
| 70 | case 0x00400000: nRc = 2; break; |
| 71 | case 0x00408000: nRc = 3; break; |
| 72 | default: nRc = 0; |
| 73 | } |
| 74 | |
| 75 | return(nRc); |
| 76 | } |
| 77 | |
| 78 | unsigned int getDestinationSize(const unsigned int opcode) |
| 79 | { |
| 80 | unsigned int nRc; |
| 81 | |
| 82 | switch (opcode & MASK_DESTINATION_SIZE) |
| 83 | { |
| 84 | case 0x00000000: nRc = typeSingle; break; |
| 85 | case 0x00000080: nRc = typeDouble; break; |
| 86 | case 0x00080000: nRc = typeExtended; break; |
| 87 | default: nRc = typeNone; |
| 88 | } |
| 89 | |
| 90 | return(nRc); |
| 91 | } |