Mesa (master): panfrost: Add panfrost_streamout_offset helper

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Module: Mesa
Branch: master
Commit: e26ac2e165c0c313df74266763b3dd0755354a98
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e26ac2e165c0c313df74266763b3dd0755354a98

Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date:   Wed Jun 10 19:28:28 2020 -0400

panfrost: Add panfrost_streamout_offset helper

Calculates the bias required for an xfb record in the src_offset field
to account for truncating the address to force alignment.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5423>

---

 src/gallium/drivers/panfrost/pan_cmdstream.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/gallium/drivers/panfrost/pan_cmdstream.c b/src/gallium/drivers/panfrost/pan_cmdstream.c
index 5c0d7f4d0e9..af2cffcd2ce 100644
--- a/src/gallium/drivers/panfrost/pan_cmdstream.c
+++ b/src/gallium/drivers/panfrost/pan_cmdstream.c
@@ -1615,6 +1615,13 @@ panfrost_emit_varyings(struct panfrost_batch *batch, union mali_attr *slot,
         return transfer.gpu;
 }
 
+static unsigned
+panfrost_streamout_offset(unsigned stride, unsigned offset,
+                        struct pipe_stream_output_target *target)
+{
+        return (target->buffer_offset + (offset * stride * 4)) & 63;
+}
+
 static void
 panfrost_emit_streamout(struct panfrost_batch *batch, union mali_attr *slot,
                         unsigned stride, unsigned offset, unsigned count,