summaryrefslogtreecommitdiffstats
path: root/tinySIGCOMP/src/tcomp_udvm.operands.c
diff options
context:
space:
mode:
Diffstat (limited to 'tinySIGCOMP/src/tcomp_udvm.operands.c')
-rw-r--r--tinySIGCOMP/src/tcomp_udvm.operands.c261
1 files changed, 261 insertions, 0 deletions
diff --git a/tinySIGCOMP/src/tcomp_udvm.operands.c b/tinySIGCOMP/src/tcomp_udvm.operands.c
new file mode 100644
index 0000000..8cee95a
--- /dev/null
+++ b/tinySIGCOMP/src/tcomp_udvm.operands.c
@@ -0,0 +1,261 @@
+/*
+* Copyright (C) 2009-2010 Mamadou Diop.
+*
+* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
+*
+* This file is part of Open Source Doubango Framework.
+*
+* DOUBANGO 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 3 of the License, or
+* (at your option) any later version.
+*
+* DOUBANGO 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 DOUBANGO.
+*
+*/
+
+/**@file tcomp_udvm.operands.c
+ * @brief SigComp UDVM machine (Operands).
+ *
+ * @author Mamadou Diop <diopmamadou(at)yahoo.fr>
+ *
+ * @date Created: Sat Nov 8 16:54:58 2009 mdiop
+ */
+#include "tcomp_udvm.h"
+
+#include "tsk_debug.h"
+
+#include <math.h>
+
+/**
+literal (#)<br>
+<table>
+<tr> <td>Bytecode</td> <td>Operand value</td> <td>Range</td></tr>
+<tr> <td>0nnnnnnn</td> <td>N</td> <td>0 - 127</td></tr>
+<tr> <td>10nnnnnn nnnnnnnn</td> <td>N</td> <td>0 - 16383</td></tr>
+<tr> <td>11000000 nnnnnnnn nnnnnnnn</td> <td>N</td> <td>0 - 65535</td></tr>
+</table>
+*/
+uint16_t tcomp_udvm_opget_literal_param(tcomp_udvm_t *udvm)
+{
+ uint16_t result = 0;
+ const uint8_t* memory_ptr = TCOMP_UDVM_GET_BUFFER_AT(udvm->executionPointer);
+
+ switch( *memory_ptr & 0xc0) // 2 first bits
+ {
+ case 0x00: // 0nnnnnnn N 0 - 127
+ case 0x40: // 0nnnnnnn N 0 - 127
+ {
+ result = *(memory_ptr);
+ udvm->executionPointer++;
+ }
+ break;
+
+ case 0x80: // 10nnnnnn nnnnnnnn N 0 - 16383
+ {
+ result = TSK_BINARY_GET_2BYTES(memory_ptr)&0x3fff; // All except 2 first bits
+ udvm->executionPointer+=2;
+ }
+ break;
+
+ case 0xc0: // 11000000 nnnnnnnn nnnnnnnn N 0 - 65535
+ {
+ result = TSK_BINARY_GET_2BYTES((memory_ptr+1));
+ udvm->executionPointer+=3;
+ }
+ break;
+
+ default:
+ {
+ TSK_DEBUG_ERROR("Invalide opcode: %u", *memory_ptr);
+ tcomp_udvm_createNackInfo2(udvm, NACK_INVALID_OPERAND);
+ }
+ break;
+ }
+ return result;
+}
+
+/**
+reference ($)<br>
+<table>
+<tr><td>Bytecode</td> <td>Operand value</td> <td>Range</td></tr>
+<tr><td>0nnnnnnn</td> <td>memory[2 * N]</td> <td>0 - 65535</td></tr>
+<tr><td>10nnnnnn nnnnnnnn </td> <td>memory[2 * N]</td> <td>0 - 65535</td></tr>
+<tr><td>11000000 nnnnnnnn nnnnnnnn</td> <td>memory[N]</td> <td>0 - 65535</td></tr>
+</table>
+*/
+uint16_t tcomp_udvm_opget_reference_param(tcomp_udvm_t *udvm)
+{
+ const uint8_t* memory_ptr = TCOMP_UDVM_GET_BUFFER_AT(udvm->executionPointer);
+ uint16_t result = 0;
+
+ switch( *memory_ptr & 0xc0) // 2 first bits
+ {
+ case 0x00: // 0nnnnnnn memory[2 * N] 0 - 65535
+ case 0x40: // 0nnnnnnn memory[2 * N] 0 - 65535
+ {
+ uint8_t N = (*(memory_ptr) & 0x7f); // no effect first bit is already nil
+ result = 2*N;
+ udvm->executionPointer++;
+ }
+ break;
+
+ case 0x80: // 10nnnnnn nnnnnnnn memory[2 * N] 0 - 65535
+ {
+ uint16_t N = (TSK_BINARY_GET_2BYTES(memory_ptr) & 0x3fff);
+ result = 2*N;
+ udvm->executionPointer+=2;
+ }
+ break;
+
+ case 0xc0: // 11000000 nnnnnnnn nnnnnnnn memory[N] 0 - 65535
+ {
+ uint16_t N = TSK_BINARY_GET_2BYTES(memory_ptr+1);
+ result = N;
+ udvm->executionPointer+=3;
+ }
+ break;
+
+ default:
+ {
+ TSK_DEBUG_ERROR("Invalide opcode: %u", *memory_ptr);
+ tcomp_udvm_createNackInfo2(udvm, NACK_INVALID_OPERAND);
+ }
+ break;
+ }
+
+ return result;
+}
+
+/**
+multitype(%)<br>
+<table>
+<tr><td>Bytecode</td> <td>Operand value</td> <td>Range</td></tr>
+<tr><td>00nnnnnn</td> <td>N</td> <td>0 - 63</td></tr>
+<tr><td>01nnnnnn</td> <td>memory[2 * N]</td> <td>0 - 65535</td></tr>
+<tr><td>1000011n</td> <td>2 ^ (N + 6)</td> <td>64 , 128</td></tr>
+<tr><td>10001nnn</td> <td>2 ^ (N + 8)</td> <td>256 , ... , 32768</td></tr>
+<tr><td>111nnnnn</td> <td>N + 65504</td> <td>65504 - 65535</td></tr>
+<tr><td>1001nnnn nnnnnnnn</td> <td>N + 61440</td> <td>61440 - 65535</td></tr>
+<tr><td>101nnnnn nnnnnnnn</td> <td>N</td> <td>0 - 8191</td></tr>
+<tr><td>110nnnnn nnnnnnnn</td> <td>memory[N]</td> <td>0 - 65535</td></tr>
+<tr><td>10000000 nnnnnnnn nnnnnnnn</td> <td>N</td> <td>0 - 65535</td></tr>
+<tr><td>10000001 nnnnnnnn nnnnnnnn</td> <td>memory[N]</td> <td>0 - 65535</td></tr>
+</table>
+*/
+uint16_t tcomp_udvm_opget_multitype_param(tcomp_udvm_t *udvm)
+{
+ const uint8_t* memory_ptr = TCOMP_UDVM_GET_BUFFER_AT(udvm->executionPointer);
+ int8_t index = operand_multitype_indexes[*memory_ptr];
+ uint16_t result = 0;
+
+ switch(index)
+ {
+ case 1: // 00nnnnnn N 0 - 63
+ {
+ result = *(memory_ptr);
+ udvm->executionPointer++;
+ }
+ break;
+
+ case 2: // 01nnnnnn memory[2 * N] 0 - 65535
+ {
+ uint8_t N = (*(memory_ptr) & 0x3f);
+ result = TSK_BINARY_GET_2BYTES( TCOMP_UDVM_GET_BUFFER_AT(2*N) );
+ udvm->executionPointer++;
+ }
+ break;
+
+ case 3: // 1000011n 2 ^ (N + 6) 64 , 128
+ {
+ uint8_t N = (*(memory_ptr) & 0x01);
+ result = (uint16_t)pow( (double)2, (N + 6) );
+ udvm->executionPointer++;
+ }
+ break;
+
+ case 4: // 10001nnn 2 ^ (N + 8) 256 , ... , 32768
+ {
+ uint8_t N = (*(memory_ptr) & 0x07);
+ result = (uint16_t)pow( (double)2, (N + 8) );
+ udvm->executionPointer++;
+ }
+ break;
+
+ case 5: // 111nnnnn N + 65504 65504 - 65535
+ {
+ result = ((*(memory_ptr) & 0x1f) + 65504 );
+ udvm->executionPointer++;
+ }
+ break;
+
+ case 6: // 1001nnnn nnnnnnnn N + 61440 61440 - 65535
+ {
+ result = (TSK_BINARY_GET_2BYTES(memory_ptr) & 0x0fff) + 61440;
+ udvm->executionPointer+=2;
+ }
+ break;
+
+ case 7: // 101nnnnn nnnnnnnn N 0 - 8191
+ {
+ result = (TSK_BINARY_GET_2BYTES(memory_ptr) & 0x1fff);
+ udvm->executionPointer+=2;
+ }
+ break;
+
+ case 8: // 110nnnnn nnnnnnnn memory[N] 0 - 65535
+ {
+ uint16_t N = TSK_BINARY_GET_2BYTES(memory_ptr) & 0x1fff;
+ result = TSK_BINARY_GET_2BYTES( TCOMP_UDVM_GET_BUFFER_AT(N) );
+ udvm->executionPointer+=2;
+ }
+ break;
+
+ case 9: // 10000000 nnnnnnnn nnnnnnnn N 0 - 65535
+ {
+ result = TSK_BINARY_GET_2BYTES(memory_ptr+1);
+ udvm->executionPointer+=3;
+ }
+ break;
+
+ case 10: // 10000001 nnnnnnnn nnnnnnnn memory[N] 0 - 65535
+ {
+ uint16_t N = TSK_BINARY_GET_2BYTES(memory_ptr+1);
+ result = TSK_BINARY_GET_2BYTES( TCOMP_UDVM_GET_BUFFER_AT(N) );
+ udvm->executionPointer+=3;
+ }
+ break;
+
+ default: // -1
+ {
+ TSK_DEBUG_ERROR("Invalide opcode: %u", *memory_ptr);
+ tcomp_udvm_createNackInfo2(udvm, NACK_INVALID_OPERAND);
+ }
+ break;
+ }
+
+ return result;
+}
+
+/**
+address(@)
+This operand is decoded as a multitype operand followed by a further step: the memory address
+of the UDVM instruction containing the address operand is added to
+obtain the correct operand value. So if the operand value from
+Figure 10 is D then the actual operand value of an address is
+calculated as follows:
+
+ operand_value = (memory_address_of_instruction + D) modulo 2^16
+*/
+uint16_t tcomp_udvm_opget_address_param(tcomp_udvm_t *udvm, uint16_t memory_address_of_instruction)
+{
+ uint16_t D = tcomp_udvm_opget_multitype_param(udvm);
+ // (2^16) => 65536;
+ return ( (memory_address_of_instruction + D)%65536 );
+}
OpenPOWER on IntegriCloud