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[/] [or1k_soc_on_altera_embedded_dev_kit/] [tags/] [linux-2.6/] [linux-2.6.24_or32_unified_v2.3/] [arch/] [arm/] [nwfpe/] [fpopcode.c] - Rev 3
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/* NetWinder Floating Point Emulator (c) Rebel.COM, 1998,1999 Direct questions, comments to Scott Bambrough <scottb@netwinder.org> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "fpa11.h" #include "softfloat.h" #include "fpopcode.h" #include "fpsr.h" #include "fpmodule.h" #include "fpmodule.inl" #ifdef CONFIG_FPE_NWFPE_XP const floatx80 floatx80Constant[] = { { .high = 0x0000, .low = 0x0000000000000000ULL},/* extended 0.0 */ { .high = 0x3fff, .low = 0x8000000000000000ULL},/* extended 1.0 */ { .high = 0x4000, .low = 0x8000000000000000ULL},/* extended 2.0 */ { .high = 0x4000, .low = 0xc000000000000000ULL},/* extended 3.0 */ { .high = 0x4001, .low = 0x8000000000000000ULL},/* extended 4.0 */ { .high = 0x4001, .low = 0xa000000000000000ULL},/* extended 5.0 */ { .high = 0x3ffe, .low = 0x8000000000000000ULL},/* extended 0.5 */ { .high = 0x4002, .low = 0xa000000000000000ULL},/* extended 10.0 */ }; #endif const float64 float64Constant[] = { 0x0000000000000000ULL, /* double 0.0 */ 0x3ff0000000000000ULL, /* double 1.0 */ 0x4000000000000000ULL, /* double 2.0 */ 0x4008000000000000ULL, /* double 3.0 */ 0x4010000000000000ULL, /* double 4.0 */ 0x4014000000000000ULL, /* double 5.0 */ 0x3fe0000000000000ULL, /* double 0.5 */ 0x4024000000000000ULL /* double 10.0 */ }; const float32 float32Constant[] = { 0x00000000, /* single 0.0 */ 0x3f800000, /* single 1.0 */ 0x40000000, /* single 2.0 */ 0x40400000, /* single 3.0 */ 0x40800000, /* single 4.0 */ 0x40a00000, /* single 5.0 */ 0x3f000000, /* single 0.5 */ 0x41200000 /* single 10.0 */ }; /* condition code lookup table index into the table is test code: EQ, NE, ... LT, GT, AL, NV bit position in short is condition code: NZCV */ static const unsigned short aCC[16] = { 0xF0F0, // EQ == Z set 0x0F0F, // NE 0xCCCC, // CS == C set 0x3333, // CC 0xFF00, // MI == N set 0x00FF, // PL 0xAAAA, // VS == V set 0x5555, // VC 0x0C0C, // HI == C set && Z clear 0xF3F3, // LS == C clear || Z set 0xAA55, // GE == (N==V) 0x55AA, // LT == (N!=V) 0x0A05, // GT == (!Z && (N==V)) 0xF5FA, // LE == (Z || (N!=V)) 0xFFFF, // AL always 0 // NV }; unsigned int checkCondition(const unsigned int opcode, const unsigned int ccodes) { return (aCC[opcode >> 28] >> (ccodes >> 28)) & 1; }
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