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freedreno/a3xx: handle index_bias (i.e. base_vertex)

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Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
This commit is contained in:
Ilia Mirkin 2014-12-04 00:45:45 -05:00
parent b38b40d7bb
commit c416f49ebe
1 changed files with 13 additions and 3 deletions
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16
src/gallium/drivers/freedreno/a3xx/fd3_draw.c
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@ -42,6 +42,16 @@
#include "fd3_format.h"
#include "fd3_zsa.h"
static inline uint32_t
add_sat(uint32_t a, int32_t b)
{
int64_t ret = (uint64_t)a + (int64_t)b;
if (ret > ~0U)
return ~0U;
if (ret < 0)
return 0;
return (uint32_t)ret;
}
static void
draw_impl(struct fd_context *ctx, struct fd_ringbuffer *ring,
@ -58,10 +68,10 @@ draw_impl(struct fd_context *ctx, struct fd_ringbuffer *ring,
OUT_RING(ring, 0x0000000b); /* PC_VERTEX_REUSE_BLOCK_CNTL */
OUT_PKT0(ring, REG_A3XX_VFD_INDEX_MIN, 4);
OUT_RING(ring, info->min_index); /* VFD_INDEX_MIN */
OUT_RING(ring, info->max_index); /* VFD_INDEX_MAX */
OUT_RING(ring, add_sat(info->min_index, info->index_bias)); /* VFD_INDEX_MIN */
OUT_RING(ring, add_sat(info->max_index, info->index_bias)); /* VFD_INDEX_MAX */
OUT_RING(ring, info->start_instance); /* VFD_INSTANCEID_OFFSET */
OUT_RING(ring, info->start); /* VFD_INDEX_OFFSET */
OUT_RING(ring, info->indexed ? info->index_bias : info->start); /* VFD_INDEX_OFFSET */
OUT_PKT0(ring, REG_A3XX_PC_RESTART_INDEX, 1);
OUT_RING(ring, info->primitive_restart ? /* PC_RESTART_INDEX */