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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/nwfpe/fpopcode.c
downloadconfigs-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/nwfpe/fpopcode.c')
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diff --git a/arch/arm/nwfpe/fpopcode.c b/arch/arm/nwfpe/fpopcode.c
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+++ b/arch/arm/nwfpe/fpopcode.c
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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[] = {
+ {0x0000, 0x0000000000000000ULL}, /* extended 0.0 */
+ {0x3fff, 0x8000000000000000ULL}, /* extended 1.0 */
+ {0x4000, 0x8000000000000000ULL}, /* extended 2.0 */
+ {0x4000, 0xc000000000000000ULL}, /* extended 3.0 */
+ {0x4001, 0x8000000000000000ULL}, /* extended 4.0 */
+ {0x4001, 0xa000000000000000ULL}, /* extended 5.0 */
+ {0x3ffe, 0x8000000000000000ULL}, /* extended 0.5 */
+ {0x4002, 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;
+}