[Mesa-dev] [PATCH 10/12] i965/fs: Hook up SIMD lowering to unroll FB writes of unsupported width.

[Francisco Jerez]

This shouldn't have any effect because we don't emit logical
framebuffer writes yet.
---
 src/mesa/drivers/dri/i965/brw_fs.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index ae050b7..70fdc5e 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3249,6 +3249,15 @@ get_lowered_simd_width(const struct brw_device_info *devinfo,
                        const fs_inst *inst)
 {
    switch (inst->opcode) {
+   case FS_OPCODE_FB_WRITE_LOGICAL:
+      /* Gen6 doesn't support SIMD16 depth writes but we cannot handle them
+       * here.
+       */
+      assert(devinfo->gen != 6 || inst->src[3].file == BAD_FILE ||
+             inst->exec_size <= 8);
+      /* Dual-source FB writes are unsupported in SIMD16 mode. */
+      return (inst->src[1].file != BAD_FILE ? 8 : inst->exec_size);
+
    default:
       return inst->exec_size;
    }
-- 
2.4.3