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authorBrian Paul <brianp@vmware.com>2009-06-18 09:26:18 -0600
committerBrian Paul <brianp@vmware.com>2009-06-19 12:19:33 -0600
commite90d6a3cbfdf26b67ccb000265eb529b82c03eb4 (patch)
tree30959b25145d1a22121f476426a3ed42e76885e5
parentfd7d764514c540987549c3ea88a2d669b0f0ea58 (diff)
i965: initial code for loops in vertex programs
-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_emit.c40
1 files changed, 38 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index a10e307f1e..edb604b653 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -1184,12 +1184,13 @@ post_vs_emit( struct brw_vs_compile *c,
void brw_vs_emit(struct brw_vs_compile *c )
{
#define MAX_IF_DEPTH 32
+#define MAX_LOOP_DEPTH 32
struct brw_compile *p = &c->func;
const GLuint nr_insns = c->vp->program.Base.NumInstructions;
- GLuint insn, if_depth = 0;
+ GLuint insn, if_depth = 0, loop_depth = 0;
GLuint end_offset = 0;
struct brw_instruction *end_inst, *last_inst;
- struct brw_instruction *if_inst[MAX_IF_DEPTH];
+ struct brw_instruction *if_inst[MAX_IF_DEPTH], *loop_inst[MAX_LOOP_DEPTH];
const struct brw_indirect stack_index = brw_indirect(0, 0);
GLuint index;
GLuint file;
@@ -1391,6 +1392,41 @@ void brw_vs_emit(struct brw_vs_compile *c )
assert(if_depth > 0);
brw_ENDIF(p, if_inst[--if_depth]);
break;
+#if 0
+ case OPCODE_BGNLOOP:
+ loop_inst[loop_depth++] = brw_DO(p, BRW_EXECUTE_8);
+ break;
+ case OPCODE_BRK:
+ brw_BREAK(p);
+ brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+ break;
+ case OPCODE_CONT:
+ brw_CONT(p);
+ brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+ break;
+ case OPCODE_ENDLOOP:
+ {
+ struct brw_instruction *inst0, *inst1;
+ loop_depth--;
+ inst0 = inst1 = brw_WHILE(p, loop_inst[loop_depth]);
+ /* patch all the BREAK/CONT instructions from last BEGINLOOP */
+ while (inst0 > loop_inst[loop_depth]) {
+ inst0--;
+ if (inst0->header.opcode == BRW_OPCODE_BREAK) {
+ inst0->bits3.if_else.jump_count = inst1 - inst0 + 1;
+ inst0->bits3.if_else.pop_count = 0;
+ }
+ else if (inst0->header.opcode == BRW_OPCODE_CONTINUE) {
+ inst0->bits3.if_else.jump_count = inst1 - inst0;
+ inst0->bits3.if_else.pop_count = 0;
+ }
+ }
+ }
+ break;
+#else
+ (void) loop_inst;
+ (void) loop_depth;
+#endif
case OPCODE_BRA:
brw_set_predicate_control(p, BRW_PREDICATE_NORMAL);
brw_ADD(p, brw_ip_reg(), brw_ip_reg(), brw_imm_d(1*16));