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authorTom Stellard <[email protected]>2010-06-24 18:45:46 -0700
committerMarek Olšák <[email protected]>2010-07-03 04:32:41 +0200
commit7da9e1e61b4dbd627404941f72d2f7a40dc9153b (patch)
tree1041572a0949506e17a8732b9ee0c8b1d24eff5d /src/mesa
parentf381c52081b2cbff31c2f38abf16dffcc08f681c (diff)
r300/compiler: Fix loop unrolling
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.c b/src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.c
index 696cfd5ddc9..131e9e7436d 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.c
@@ -267,8 +267,22 @@ static int transform_const_loop(struct emulate_loop_state * s,
* simple, since we only support increment and decrement loops.
*/
limit_value = get_constant_value(s->C, limit, 0);
- iterations = (int) ((limit_value - counter_value.Value) /
+ DBG("Limit is %f.\n", limit_value);
+ switch(loop->Cond->U.I.Opcode){
+ case RC_OPCODE_SGT:
+ case RC_OPCODE_SLT:
+ iterations = (int) ceilf((limit_value - counter_value.Value) /
count_inst.Amount);
+ break;
+
+ case RC_OPCODE_SLE:
+ case RC_OPCODE_SGE:
+ iterations = (int) floorf((limit_value - counter_value.Value) /
+ count_inst.Amount) + 1;
+ break;
+ default:
+ return 0;
+ }
DBG("Loop will have %d iterations.\n", iterations);