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r600g: use maths instead of a loop to work out mask.

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This is equivalent results with less looping.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2011-06-21 15:18:44 +10:00
parent 59a402cecd
commit e251b3903a
1 changed files with 1 additions and 4 deletions
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5
src/gallium/drivers/r600/r600_state_common.c
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@ -576,10 +576,7 @@ void r600_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *info)
if (rctx->alpha_ref_dirty)
r600_update_alpha_ref(rctx);
mask = 0;
for (int i = 0; i < rctx->framebuffer.nr_cbufs; i++) {
mask |= (0xF << (i * 4));
}
mask = (1ULL << ((unsigned)rctx->framebuffer.nr_cbufs * 4)) - 1;
if (rctx->vgt.id != R600_PIPE_STATE_VGT) {
rctx->vgt.id = R600_PIPE_STATE_VGT;