1 /*****************************************************************************/
5 /* Objectcode management for the ca65 macroassembler */
9 /* (C) 1998-2008 Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
47 /*****************************************************************************/
49 /*****************************************************************************/
53 void Emit0 (unsigned char OPC)
54 /* Emit an instruction with a zero sized operand */
56 Fragment* F = GenFragment (FRAG_LITERAL, 1);
62 void Emit1 (unsigned char OPC, ExprNode* Value)
63 /* Emit an instruction with an one byte argument */
71 void Emit2 (unsigned char OPC, ExprNode* Value)
72 /* Emit an instruction with a two byte argument */
80 void Emit3 (unsigned char OPC, ExprNode* Expr)
81 /* Emit an instruction with a three byte argument */
89 void EmitSigned (ExprNode* Expr, unsigned Size)
90 /* Emit a signed expression with the given size */
92 Fragment* F = GenFragment (FRAG_SEXPR, Size);
98 void EmitPCRel (unsigned char OPC, ExprNode* Expr, unsigned Size)
99 /* Emit an opcode with a PC relative argument of one or two bytes */
102 EmitSigned (Expr, Size);
107 void EmitData (const void* D, unsigned Size)
108 /* Emit data into the current segment */
110 /* Make a useful pointer from Data */
111 const unsigned char* Data = D;
113 /* Create lots of fragments for the data */
117 /* Determine the length of the next fragment */
119 if (Len > sizeof (F->V.Data)) {
120 Len = sizeof (F->V.Data);
123 /* Create a new fragment */
124 F = GenFragment (FRAG_LITERAL, Len);
127 memcpy (F->V.Data, Data, Len);
138 void EmitStrBuf (const StrBuf* Data)
139 /* Emit a string into the current segment */
141 /* Use EmitData to output the data */
142 EmitData (SB_GetConstBuf (Data), SB_GetLen (Data));
147 void EmitByte (ExprNode* Expr)
150 /* Create a new fragment */
151 Fragment* F = GenFragment (FRAG_EXPR, 1);
159 void EmitWord (ExprNode* Expr)
162 /* Create a new fragment */
163 Fragment* F = GenFragment (FRAG_EXPR, 2);
171 void EmitFarAddr (ExprNode* Expr)
172 /* Emit a 24 bit expression */
174 /* Create a new fragment */
175 Fragment* F = GenFragment (FRAG_EXPR, 3);
183 void EmitDWord (ExprNode* Expr)
186 /* Create a new fragment */
187 Fragment* F = GenFragment (FRAG_EXPR, 4);
195 void EmitFill (unsigned long Count)
196 /* Emit Count fill bytes */
199 /* Calculate the size of the next chunk */
200 unsigned Chunk = (Count > 0xFFFF)? 0xFFFF : (unsigned) Count;
204 GenFragment (FRAG_FILL, Chunk);