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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 <linux/config.h>
#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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