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radv: improve a comment in si_emit_set_predication_state()

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Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset
2018-09-12 23:20:39 +02:00
parent abdf396cbe
commit f398595dca
1 changed files with 6 additions and 8 deletions
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12
src/amd/vulkan/si_cmd_buffer.c
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@@ -1004,20 +1004,18 @@ si_emit_cache_flush(struct radv_cmd_buffer *cmd_buffer)
/* sets the CP predication state using a boolean stored at va */
void
si_emit_set_predication_state(struct radv_cmd_buffer *cmd_buffer,
bool inverted, uint64_t va)
bool draw_visible, uint64_t va)
{
uint32_t op = 0;
if (va) {
op = PRED_OP(PREDICATION_OP_BOOL64);
/* By default, our internal rendering commands are discarded
* only if the predicate is non-zero (ie. DRAW_VISIBLE). But
* VK_EXT_conditional_rendering also allows to discard commands
* when the predicate is zero, which means we have to use a
* different flag.
/* PREDICATION_DRAW_VISIBLE means that if the 32-bit value is
* zero, all rendering commands are discarded. Otherwise, they
* are discarded if the value is non zero.
*/
op |= inverted ? PREDICATION_DRAW_VISIBLE :
op |= draw_visible ? PREDICATION_DRAW_VISIBLE :
PREDICATION_DRAW_NOT_VISIBLE;
}
if (cmd_buffer->device->physical_device->rad_info.chip_class >= GFX9) {