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i965: Add support for loops on Ivybridge. 

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke 2011-04-30 01:17:52 -07:00
parent 64ce592679
commit 77397ef96e
1 changed files with 18 additions and 3 deletions
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21
src/mesa/drivers/dri/i965/brw_eu_emit.c
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@ -1319,7 +1319,17 @@ struct brw_instruction *brw_WHILE(struct brw_compile *p,
if (intel->gen >= 5)
br = 2;
if (intel->gen >= 6) {
if (intel->gen >= 7) {
insn = next_insn(p, BRW_OPCODE_WHILE);
brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D));
brw_set_src0(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_D));
brw_set_src1(p, insn, brw_imm_ud(0));
insn->bits3.break_cont.jip = br * (do_insn - insn);
insn->header.execution_size = do_insn->header.execution_size;
assert(insn->header.execution_size == BRW_EXECUTE_8);
} else if (intel->gen == 6) {
insn = next_insn(p, BRW_OPCODE_WHILE);
brw_set_dest(p, insn, brw_imm_w(0));
@ -2277,6 +2287,7 @@ brw_find_next_block_end(struct brw_compile *p, int start)
static int
brw_find_loop_end(struct brw_compile *p, int start)
{
struct intel_context *intel = &p->brw->intel;
int ip;
int br = 2;
@ -2284,7 +2295,9 @@ brw_find_loop_end(struct brw_compile *p, int start)
struct brw_instruction *insn = &p->store[ip];
if (insn->header.opcode == BRW_OPCODE_WHILE) {
if (ip + insn->bits1.branch_gen6.jump_count / br < start)
int jip = intel->gen == 6 ? insn->bits1.branch_gen6.jump_count
: insn->bits3.break_cont.jip;
if (ip + jip / br < start)
return ip;
}
}
@ -2311,7 +2324,9 @@ brw_set_uip_jip(struct brw_compile *p)
switch (insn->header.opcode) {
case BRW_OPCODE_BREAK:
insn->bits3.break_cont.jip = br * (brw_find_next_block_end(p, ip) - ip);
insn->bits3.break_cont.uip = br * (brw_find_loop_end(p, ip) - ip + 1);
/* Gen7 UIP points to WHILE; Gen6 points just after it */
insn->bits3.break_cont.uip =
br * (brw_find_loop_end(p, ip) - ip + (intel->gen == 6 ? 1 : 0));
break;
case BRW_OPCODE_CONTINUE:
/* JIP is set at CONTINUE emit time, since that's when we