1567a00568
Raise illegal instruction exceptions when executing instructions that require units not available on the particulare microblaze configuration. Also trap priviliege violations made by userspace. Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
53 lines
2.1 KiB
C
53 lines
2.1 KiB
C
/*
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* MicroBlaze insn decoding macros.
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*
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* Copyright (c) 2009 Edgar E. Iglesias <edgar.iglesias@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/* Convenient binary macros. */
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#define HEX__(n) 0x##n##LU
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#define B8__(x) ((x&0x0000000FLU)?1:0) \
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+ ((x&0x000000F0LU)?2:0) \
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+ ((x&0x00000F00LU)?4:0) \
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+ ((x&0x0000F000LU)?8:0) \
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+ ((x&0x000F0000LU)?16:0) \
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+ ((x&0x00F00000LU)?32:0) \
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+ ((x&0x0F000000LU)?64:0) \
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+ ((x&0xF0000000LU)?128:0)
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#define B8(d) ((unsigned char)B8__(HEX__(d)))
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/* Decode logic, mask and value. */
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#define DEC_ADD {B8(00000000), B8(00110001)}
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#define DEC_SUB {B8(00000001), B8(00110001)}
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#define DEC_AND {B8(00100001), B8(00110101)}
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#define DEC_XOR {B8(00100010), B8(00110111)}
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#define DEC_OR {B8(00100000), B8(00110111)}
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#define DEC_BIT {B8(00100100), B8(00111111)}
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#define DEC_MSR {B8(00100101), B8(00111111)}
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#define DEC_BARREL {B8(00010001), B8(00110111)}
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#define DEC_MUL {B8(00010000), B8(00110111)}
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#define DEC_DIV {B8(00010010), B8(00110111)}
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#define DEC_FPU {B8(00111111), B8(00010110)}
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#define DEC_LD {B8(00110000), B8(00110100)}
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#define DEC_ST {B8(00110100), B8(00110100)}
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#define DEC_IMM {B8(00101100), B8(00111111)}
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#define DEC_BR {B8(00100110), B8(00110111)}
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#define DEC_BCC {B8(00100111), B8(00110111)}
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#define DEC_RTS {B8(00101101), B8(00111111)}
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