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/* |
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* Copyright (C) 2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: cpu_alpha_instr_alu.c,v 1.12 2005/08/07 08:57:54 debug Exp $ |
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* |
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* Alpha ALU instructions. (Included from tmp_alpha_misc.c.) |
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* |
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* |
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* Most ALU instructions have the following arguments: |
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* |
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* arg[0] = pointer to destination uint64_t |
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* arg[1] = pointer to source uint64_t nr 1 |
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* arg[2] = pointer to source uint64_t nr 2 |
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* |
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* or, if ALU_IMM is set, arg[2] contains an 8-bit immediate value. |
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* |
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* The main function groups are: |
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* |
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* ALU_INS inserts |
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* ALU_EXT extracts |
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* ALU_MSK masks |
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* ALU_CMOV conditional moves |
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* ALU_CMP compares |
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* none of the above everything else (add, sub, ...) |
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*/ |
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|
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void ALU_N(struct cpu *cpu, struct alpha_instr_call *ic) |
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{ |
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#ifdef ALU_INS |
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|
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uint64_t x = *((uint64_t *)ic->arg[1]); |
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int r = ( |
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#ifdef ALU_IMM |
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ic->arg[2] |
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#else |
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(*((uint64_t *)ic->arg[2])) |
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#endif |
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& 7) * 8; |
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|
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#ifdef ALU_B |
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x &= 0xff; |
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#endif |
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#ifdef ALU_W |
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x &= 0xffff; |
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#endif |
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#ifdef ALU_L |
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x &= 0xffffffffULL; |
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#endif |
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|
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#ifdef ALU_LO |
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x <<= r; |
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#else |
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r = 64 - r; |
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if (r == 64) |
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x = 0; |
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else |
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x >>= r; |
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#endif |
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*((uint64_t *)ic->arg[0]) = x; |
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|
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#else /* ! INS */ |
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|
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#ifdef ALU_EXT |
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|
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uint64_t x = *((uint64_t *)ic->arg[1]); |
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int r = ( |
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#ifdef ALU_IMM |
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ic->arg[2] |
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#else |
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(*((uint64_t *)ic->arg[2])) |
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#endif |
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& 7) * 8; |
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#ifdef ALU_LO |
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x >>= r; |
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#else |
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r = 64 - r; |
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if (r != 64) |
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x <<= r; |
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#endif |
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#ifdef ALU_B |
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x &= 0xff; |
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#endif |
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#ifdef ALU_W |
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x &= 0xffff; |
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#endif |
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#ifdef ALU_L |
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x &= 0xffffffffULL; |
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#endif |
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*((uint64_t *)ic->arg[0]) = x; |
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|
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#else /* ! EXT */ |
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|
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#ifdef ALU_MSK |
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|
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uint64_t x = *((uint64_t *)ic->arg[1]); |
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#ifdef ALU_B |
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uint64_t mask = 0x00000000000000ffULL; |
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#endif |
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#ifdef ALU_W |
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uint64_t mask = 0x000000000000ffffULL; |
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#endif |
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#ifdef ALU_L |
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uint64_t mask = 0x00000000ffffffffULL; |
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#endif |
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#ifdef ALU_Q |
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uint64_t mask = 0xffffffffffffffffULL; |
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#endif |
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int r = ( |
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#ifdef ALU_IMM |
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ic->arg[2] |
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#else |
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(*((uint64_t *)ic->arg[2])) |
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#endif |
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& 7) * 8; |
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|
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#ifdef ALU_LO |
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mask <<= r; |
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#else |
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if (r == 0) |
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mask = 0; |
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else |
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mask >>= (64 - r); |
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#endif |
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|
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*((uint64_t *)ic->arg[0]) = x & ~mask; |
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|
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#else /* !MSK */ |
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|
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#ifdef ALU_CMOV |
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|
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if ( |
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#ifdef ALU_CMOV_lbc |
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!( |
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#endif |
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(*((int64_t *)ic->arg[1])) |
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#ifdef ALU_CMOV_eq |
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== 0 |
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#endif |
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#ifdef ALU_CMOV_ne |
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!= 0 |
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#endif |
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#ifdef ALU_CMOV_le |
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<= 0 |
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#endif |
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#ifdef ALU_CMOV_lt |
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< 0 |
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#endif |
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#ifdef ALU_CMOV_ge |
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>= 0 |
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#endif |
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#ifdef ALU_CMOV_gt |
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> 0 |
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#endif |
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#ifdef ALU_CMOV_lbs |
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& 1 |
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#endif |
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#ifdef ALU_CMOV_lbc |
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& 1) |
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#endif |
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) |
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*((uint64_t *)ic->arg[0]) = |
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#ifdef ALU_IMM |
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(uint64_t)ic->arg[2] |
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#else |
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(*((uint64_t *)ic->arg[2])) |
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#endif |
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; |
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|
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#else /* ! CMOV */ |
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|
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#ifdef ALU_CMP |
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|
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uint64_t x; |
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|
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x = (*(( |
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#ifdef ALU_UNSIGNED |
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uint64_t |
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#else |
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int64_t |
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#endif |
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*)ic->arg[1])) |
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|
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#ifdef ALU_CMP_EQ |
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== |
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#endif |
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#ifdef ALU_CMP_LE |
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<= |
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#endif |
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#ifdef ALU_CMP_LT |
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< |
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#endif |
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|
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#ifdef ALU_IMM |
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#ifdef ALU_UNSIGNED |
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(uint64_t)ic->arg[2] |
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#else |
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(int64_t)ic->arg[2] |
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#endif |
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#else |
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#ifdef ALU_UNSIGNED |
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(*((uint64_t *)ic->arg[2])) |
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#else |
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(*((int64_t *)ic->arg[2])) |
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#endif |
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#endif |
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; |
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|
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#else /* !ALU_CMP */ |
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|
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#ifdef ALU_LONG |
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/* Long */ |
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int32_t x; |
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#else |
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/* Quad */ |
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int64_t x; |
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#endif |
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|
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#ifdef ALU_ZAP |
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/* Prepare for zapping: */ |
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uint64_t zapmask = 0xffffffffffffffffULL; |
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int zapbytes = |
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#ifdef ALU_NOT |
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~ |
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#endif |
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#ifdef ALU_IMM |
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(int64_t)ic->arg[2] |
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#else |
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(*((uint64_t *)ic->arg[2])) |
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#endif |
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; |
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if (zapbytes & 0x80) |
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zapmask &= ~0xff00000000000000ULL; |
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if (zapbytes & 0x40) |
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zapmask &= ~0xff000000000000ULL; |
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if (zapbytes & 0x20) |
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zapmask &= ~0xff0000000000ULL; |
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if (zapbytes & 0x10) |
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zapmask &= ~0xff00000000ULL; |
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if (zapbytes & 0x08) |
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zapmask &= ~0xff000000ULL; |
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if (zapbytes & 0x04) |
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zapmask &= ~0xff0000ULL; |
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if (zapbytes & 0x02) |
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zapmask &= ~0xff00ULL; |
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if (zapbytes & 0x01) |
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zapmask &= ~0xffULL; |
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#endif /* ZAP */ |
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|
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x = ( |
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#ifdef ALU_SRA |
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(int64_t) |
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#endif |
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(*((uint64_t *)ic->arg[1])) |
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#ifdef ALU_S4 |
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* 4 |
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#endif |
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#ifdef ALU_S8 |
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* 8 |
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#endif |
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) |
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#ifdef ALU_ADD |
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+ |
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#endif |
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#ifdef ALU_SUB |
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- |
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#endif |
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#ifdef ALU_OR |
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| |
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#endif |
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#ifdef ALU_XOR |
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^ |
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#endif |
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#ifdef ALU_AND |
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& |
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#endif |
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#ifdef ALU_SLL |
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<< |
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#endif |
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#if defined(ALU_SRA) || defined(ALU_SRL) |
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>> |
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#endif |
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|
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#ifdef ALU_ZAP |
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& zapmask |
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#else /* !ZAP */ |
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( |
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#ifdef ALU_NOT |
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~ |
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#endif |
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( |
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#ifdef ALU_IMM |
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(int64_t)ic->arg[2] |
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#else |
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(*((uint64_t *)ic->arg[2])) |
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#endif |
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#if defined(ALU_SRA) || defined(ALU_SRL) || defined(ALU_SLL) |
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& 63 |
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#endif |
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) |
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) |
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#endif /* !ZAP */ |
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|
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; |
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|
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#endif /* !ALU_CMP */ |
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|
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*((uint64_t *)ic->arg[0]) = x; |
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#endif /* ! CMOV */ |
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#endif /* ! MSK */ |
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#endif /* ! EXT */ |
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#endif /* ! INS */ |
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} |
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