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radv: Don't use a divide by index_size.

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Divides are pretty slow, and this is in the hot path of a draw.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Bas Nieuwenhuizen
2017-06-06 18:22:23 +02:00
parent 7063696b71
commit fe0b8d1e8b
1 changed files with 8 additions and 3 deletions
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src/amd/vulkan/radv_cmd_buffer.c
+8 -3
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@@ -2643,6 +2643,12 @@ void radv_CmdDraw(
radv_cmd_buffer_trace_emit(cmd_buffer);
}
static
uint32_t radv_get_max_index_count(struct radv_cmd_buffer *cmd_buffer) {
int index_size_shift = cmd_buffer->state.index_type ? 2 : 1;
return (cmd_buffer->state.index_buffer->size - cmd_buffer->state.index_offset) >> index_size_shift;
}
void radv_CmdDrawIndexed(
VkCommandBuffer commandBuffer,
uint32_t indexCount,
@@ -2653,7 +2659,7 @@ void radv_CmdDrawIndexed(
{
RADV_FROM_HANDLE(radv_cmd_buffer, cmd_buffer, commandBuffer);
int index_size = cmd_buffer->state.index_type ? 4 : 2;
uint32_t index_max_size = (cmd_buffer->state.index_buffer->size - cmd_buffer->state.index_offset) / index_size;
uint32_t index_max_size = radv_get_max_index_count(cmd_buffer);
uint64_t index_va;
radv_cmd_buffer_flush_state(cmd_buffer, true, (instanceCount > 1), false, indexCount);
@@ -2789,8 +2795,7 @@ radv_cmd_draw_indexed_indirect_count(
uint32_t stride)
{
RADV_FROM_HANDLE(radv_cmd_buffer, cmd_buffer, commandBuffer);
int index_size = cmd_buffer->state.index_type ? 4 : 2;
uint32_t index_max_size = (cmd_buffer->state.index_buffer->size - cmd_buffer->state.index_offset) / index_size;
uint32_t index_max_size = radv_get_max_index_count(cmd_buffer);
uint64_t index_va;
radv_cmd_buffer_flush_state(cmd_buffer, true, false, true, 0);