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comparison lwasm/output.c @ 535:a584b9ddffc4

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Update raw output to work with RMB only definitions at the start It seems useful to be able to define a number of symbols at the start of the source file without generating a run of NUL output. This update adjusts the output to ignore any number of statements that generate no output as long as there is a subsequent ORG statement. If there is no ORG statement after them, the NUL sequence should still appear.
author William Astle <lost@l-w.ca>
date Sat, 14 May 2022 21:30:59 -0600
parents a812bb4d3a51
children 33a59e232a5b
comparison
equal deleted inserted replaced
534:558ee362437e 535:a584b9ddffc4
30 30
31 #include <lw_alloc.h> 31 #include <lw_alloc.h>
32 #include <lw_expr.h> 32 #include <lw_expr.h>
33 33
34 #include "lwasm.h" 34 #include "lwasm.h"
35 #include "instab.h"
35 36
36 void write_code_raw(asmstate_t *as, FILE *of); 37 void write_code_raw(asmstate_t *as, FILE *of);
37 void write_code_decb(asmstate_t *as, FILE *of); 38 void write_code_decb(asmstate_t *as, FILE *of);
38 void write_code_BASIC(asmstate_t *as, FILE *of); 39 void write_code_BASIC(asmstate_t *as, FILE *of);
39 void write_code_rawrel(asmstate_t *as, FILE *of); 40 void write_code_rawrel(asmstate_t *as, FILE *of);
243 244
244 /* 245 /*
245 raw merely writes all the bytes directly to the file as is. ORG is just a 246 raw merely writes all the bytes directly to the file as is. ORG is just a
246 reference for the assembler to handle absolute references. Multiple ORG 247 reference for the assembler to handle absolute references. Multiple ORG
247 statements will produce mostly useless results 248 statements will produce mostly useless results
249
250 However, if a run of RMBs exists at the start that is ended by an ORG
251 statement, that run of RMBs will not be output as a zero fill.
248 */ 252 */
249 void write_code_raw(asmstate_t *as, FILE *of) 253 void write_code_raw(asmstate_t *as, FILE *of)
250 { 254 {
251 line_t *cl; 255 line_t *cl;
252 256 line_t *sl;
253 for (cl = as -> line_head; cl; cl = cl -> next) 257
258 sl = as -> line_head;
259 for (cl = sl; cl; cl = cl -> next)
260 {
261 if (cl -> outputl > 0)
262 break;
263 if (instab[cl -> insn].flags & lwasm_insn_org)
264 sl = cl;
265 }
266 for (cl = sl; cl; cl = cl -> next)
254 { 267 {
255 if (cl -> len > 0 && cl -> outputl < 0) 268 if (cl -> len > 0 && cl -> outputl < 0)
256 { 269 {
257 int i; 270 int i;
258 for (i = 0; i < cl -> len; i++) 271 for (i = 0; i < cl -> len; i++)