On 2015-12-10 01:47, Marek Olšák wrote:
From: Marek Olšák
I guess the crash was because of divison by zero.
Cc: 11.0 11.1
---
src/gallium/auxiliary/util/u_prim.h | 17 +
src/gallium/drivers/radeonsi/si_state_draw.c | 3 ++-
2 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_prim.h
b/src/gallium/auxiliary/util/u_prim.h
index 3668015..4926af6 100644
--- a/src/gallium/auxiliary/util/u_prim.h
+++ b/src/gallium/auxiliary/util/u_prim.h
@@ -141,14 +141,23 @@ u_prim_vertex_count(unsigned prim)
* For polygons, return the number of triangles.
*/
static inline unsigned
-u_prims_for_vertices(unsigned prim, unsigned num)
+u_prims_for_vertices(unsigned prim, unsigned num, unsigned
vertices_per_patch)
{
- const struct u_prim_vertex_count *info = u_prim_vertex_count(prim);
+ struct u_prim_vertex_count info;
- if (num < info->min)
+ if (prim == PIPE_PRIM_PATCHES)
+ info.min = info.incr = vertices_per_patch;
+ else if (prim < PIPE_PRIM_MAX)
We already do this check in u_prim_vertex_count() and if out-of-bounds
we
returned a NULL. Perhaps it would be better avoid this extra else-if
branch
here and just in the else branch, make the call and then assert on the
NULL.
+ info = *u_prim_vertex_count(prim);
+ else {
+ assert(!"invalid prim type");
+ return 0;
+ }
+
+ if (num < info.min)
return 0;
Well convolving this with my previous patch,
http://lists.freedesktop.org/archives/mesa-dev/2015-December/102729.html
I think we should still have an assert(info.incr != 0); here.
- return 1 + ((num - info->min) / info->incr);
+ return 1 + ((num - info.min) / info.incr);
}
static inline boolean u_validate_pipe_prim( unsigned pipe_prim,
unsigned nr )
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c
b/src/gallium/drivers/radeonsi/si_state_draw.c
index ee84a1f..4ac9d0a 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -320,7 +320,8 @@ static unsigned si_get_ia_multi_vgt_param(struct
si_context *sctx,
if (sctx->b.screen->info.max_se >= 2 && ia_switch_on_eoi &&
(info->indirect ||
(info->instance_count > 1 &&
- u_prims_for_vertices(info->mode, info->count) <= 1)))
+ u_prims_for_vertices(info->mode, info->count,
+ info->vertices_per_patch) <= 1)))
sctx->b.flags |= SI_CONTEXT_VGT_FLUSH;
return S_028AA8_SWITCH_ON_EOP(ia_switch_on_eop) |
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