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i965: Combine brw_emit_prim and gen7_emit_prim.

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These functions have almost identical code; the only difference is that
a few of the bits moved around.  Adding a few trivial conditionals
allows the same function to work on all generations, and the resulting
code is still quite readable.

v2: Comment that the workaround flush is only necessary on SNB
    (requested by Paul Berry).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
This commit is contained in:
Kenneth Graunke 2013-04-05 23:10:39 -07:00
parent a3335417e3
commit 976d1d6665
1 changed files with 18 additions and 63 deletions
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81
src/mesa/drivers/dri/i965/brw_draw.c
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@ -171,11 +171,15 @@ static void brw_emit_prim(struct brw_context *brw,
start_vertex_location = prim->start;
base_vertex_location = prim->basevertex;
if (prim->indexed) {
vertex_access_type = GEN4_3DPRIM_VERTEXBUFFER_ACCESS_RANDOM;
vertex_access_type = brw->gen >= 7 ?
GEN7_3DPRIM_VERTEXBUFFER_ACCESS_RANDOM :
GEN4_3DPRIM_VERTEXBUFFER_ACCESS_RANDOM;
start_vertex_location += brw->ib.start_vertex_offset;
base_vertex_location += brw->vb.start_vertex_bias;
} else {
vertex_access_type = GEN4_3DPRIM_VERTEXBUFFER_ACCESS_SEQUENTIAL;
vertex_access_type = brw->gen >= 7 ?
GEN7_3DPRIM_VERTEXBUFFER_ACCESS_SEQUENTIAL :
GEN4_3DPRIM_VERTEXBUFFER_ACCESS_SEQUENTIAL;
start_vertex_location += brw->vb.start_vertex_bias;
}
@ -198,65 +202,16 @@ static void brw_emit_prim(struct brw_context *brw,
intel_batchbuffer_emit_mi_flush(brw);
}
BEGIN_BATCH(6);
OUT_BATCH(CMD_3D_PRIM << 16 | (6 - 2) |
hw_prim << GEN4_3DPRIM_TOPOLOGY_TYPE_SHIFT |
vertex_access_type);
OUT_BATCH(verts_per_instance);
OUT_BATCH(start_vertex_location);
OUT_BATCH(prim->num_instances);
OUT_BATCH(prim->base_instance);
OUT_BATCH(base_vertex_location);
ADVANCE_BATCH();
brw->batch.need_workaround_flush = true;
if (brw->always_flush_cache) {
intel_batchbuffer_emit_mi_flush(brw);
}
}
static void gen7_emit_prim(struct brw_context *brw,
const struct _mesa_prim *prim,
uint32_t hw_prim)
{
int verts_per_instance;
int vertex_access_type;
int start_vertex_location;
int base_vertex_location;
DBG("PRIM: %s %d %d\n", _mesa_lookup_enum_by_nr(prim->mode),
prim->start, prim->count);
start_vertex_location = prim->start;
base_vertex_location = prim->basevertex;
if (prim->indexed) {
vertex_access_type = GEN7_3DPRIM_VERTEXBUFFER_ACCESS_RANDOM;
start_vertex_location += brw->ib.start_vertex_offset;
base_vertex_location += brw->vb.start_vertex_bias;
if (brw->gen >= 7) {
BEGIN_BATCH(7);
OUT_BATCH(CMD_3D_PRIM << 16 | (7 - 2));
OUT_BATCH(hw_prim | vertex_access_type);
} else {
vertex_access_type = GEN7_3DPRIM_VERTEXBUFFER_ACCESS_SEQUENTIAL;
start_vertex_location += brw->vb.start_vertex_bias;
BEGIN_BATCH(6);
OUT_BATCH(CMD_3D_PRIM << 16 | (6 - 2) |
hw_prim << GEN4_3DPRIM_TOPOLOGY_TYPE_SHIFT |
vertex_access_type);
}
verts_per_instance = prim->count;
/* If nothing to emit, just return. */
if (verts_per_instance == 0)
return;
/* If we're set to always flush, do it before and after the primitive emit.
* We want to catch both missed flushes that hurt instruction/state cache
* and missed flushes of the render cache as it heads to other parts of
* the besides the draw code.
*/
if (brw->always_flush_cache) {
intel_batchbuffer_emit_mi_flush(brw);
}
BEGIN_BATCH(7);
OUT_BATCH(CMD_3D_PRIM << 16 | (7 - 2));
OUT_BATCH(hw_prim | vertex_access_type);
OUT_BATCH(verts_per_instance);
OUT_BATCH(start_vertex_location);
OUT_BATCH(prim->num_instances);
@ -264,6 +219,9 @@ static void gen7_emit_prim(struct brw_context *brw,
OUT_BATCH(base_vertex_location);
ADVANCE_BATCH();
/* Only used on Sandybridge; harmless to set elsewhere. */
brw->batch.need_workaround_flush = true;
if (brw->always_flush_cache) {
intel_batchbuffer_emit_mi_flush(brw);
}
@ -456,10 +414,7 @@ retry:
brw_upload_state(brw);
}
if (brw->gen >= 7)
gen7_emit_prim(brw, &prim[i], brw->primitive);
else
brw_emit_prim(brw, &prim[i], brw->primitive);
brw_emit_prim(brw, &prim[i], brw->primitive);
brw->no_batch_wrap = false;