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Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vs_emit.c')
-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_emit.c87
1 files changed, 64 insertions, 23 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index b69616d6e5..edb604b653 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -69,13 +69,18 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c )
{
GLuint i, reg = 0, mrf;
-#if 0
- if (c->vp->program.Base.Parameters->NumParameters >= 6)
- c->vp->use_const_buffer = 1;
+ /* Determine whether to use a real constant buffer or use a block
+ * of GRF registers for constants. The later is faster but only
+ * works if everything fits in the GRF.
+ * XXX this heuristic/check may need some fine tuning...
+ */
+ if (c->vp->program.Base.Parameters->NumParameters +
+ c->vp->program.Base.NumTemporaries + 20 > BRW_MAX_GRF)
+ c->vp->use_const_buffer = GL_TRUE;
else
-#endif
c->vp->use_const_buffer = GL_FALSE;
- /*printf("use_const_buffer = %d\n", c->use_const_buffer);*/
+
+ /*printf("use_const_buffer = %d\n", c->vp->use_const_buffer);*/
/* r0 -- reserved as usual
*/
@@ -709,10 +714,11 @@ get_constant(struct brw_vs_compile *c,
struct brw_compile *p = &c->func;
struct brw_reg const_reg;
struct brw_reg const2_reg;
+ const GLboolean relAddr = src->RelAddr;
assert(argIndex < 3);
- if (c->current_const[argIndex].index != src->Index || src->RelAddr) {
+ if (c->current_const[argIndex].index != src->Index || relAddr) {
struct brw_reg addrReg = c->regs[PROGRAM_ADDRESS][0];
c->current_const[argIndex].index = src->Index;
@@ -725,13 +731,13 @@ get_constant(struct brw_vs_compile *c,
brw_dp_READ_4_vs(p,
c->current_const[argIndex].reg,/* writeback dest */
0, /* oword */
- src->RelAddr, /* relative indexing? */
+ relAddr, /* relative indexing? */
addrReg, /* address register */
16 * src->Index, /* byte offset */
SURF_INDEX_VERT_CONST_BUFFER /* binding table index */
);
- if (src->RelAddr) {
+ if (relAddr) {
/* second read */
const2_reg = get_tmp(c);
@@ -742,7 +748,7 @@ get_constant(struct brw_vs_compile *c,
brw_dp_READ_4_vs(p,
const2_reg, /* writeback dest */
1, /* oword */
- src->RelAddr, /* relative indexing? */
+ relAddr, /* relative indexing? */
addrReg, /* address register */
16 * src->Index, /* byte offset */
SURF_INDEX_VERT_CONST_BUFFER
@@ -752,7 +758,7 @@ get_constant(struct brw_vs_compile *c,
const_reg = c->current_const[argIndex].reg;
- if (src->RelAddr) {
+ if (relAddr) {
/* merge the two Owords into the constant register */
/* const_reg[7..4] = const2_reg[7..4] */
brw_MOV(p,
@@ -1177,15 +1183,15 @@ post_vs_emit( struct brw_vs_compile *c,
*/
void brw_vs_emit(struct brw_vs_compile *c )
{
-#define MAX_IFSN 32
+#define MAX_IF_DEPTH 32
+#define MAX_LOOP_DEPTH 32
struct brw_compile *p = &c->func;
- GLuint nr_insns = c->vp->program.Base.NumInstructions;
- GLuint insn, if_insn = 0;
+ const GLuint nr_insns = c->vp->program.Base.NumInstructions;
+ 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_IFSN];
- struct brw_indirect stack_index = brw_indirect(0, 0);
-
+ 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;
@@ -1219,7 +1225,7 @@ void brw_vs_emit(struct brw_vs_compile *c )
for (insn = 0; insn < nr_insns; insn++) {
- struct prog_instruction *inst = &c->vp->program.Base.Instructions[insn];
+ const struct prog_instruction *inst = &c->vp->program.Base.Instructions[insn];
struct brw_reg args[3], dst;
GLuint i;
@@ -1232,7 +1238,7 @@ void brw_vs_emit(struct brw_vs_compile *c )
*/
if (inst->Opcode != OPCODE_SWZ)
for (i = 0; i < 3; i++) {
- struct prog_src_register *src = &inst->SrcReg[i];
+ const struct prog_src_register *src = &inst->SrcReg[i];
index = src->Index;
file = src->File;
if (file == PROGRAM_OUTPUT && c->output_regs[index].used_in_src)
@@ -1376,16 +1382,51 @@ void brw_vs_emit(struct brw_vs_compile *c )
emit_xpd(p, dst, args[0], args[1]);
break;
case OPCODE_IF:
- assert(if_insn < MAX_IFSN);
- if_inst[if_insn++] = brw_IF(p, BRW_EXECUTE_8);
+ assert(if_depth < MAX_IF_DEPTH);
+ if_inst[if_depth++] = brw_IF(p, BRW_EXECUTE_8);
break;
case OPCODE_ELSE:
- if_inst[if_insn-1] = brw_ELSE(p, if_inst[if_insn-1]);
+ if_inst[if_depth-1] = brw_ELSE(p, if_inst[if_depth-1]);
break;
case OPCODE_ENDIF:
- assert(if_insn > 0);
- brw_ENDIF(p, if_inst[--if_insn]);
+ 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));
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-26 11:50:02 +0000