i965/fs: fix regs_written in LOAD_PAYLOAD for doubles

v2: Account for the stride of the dst (Iago)

Signed-off-by: Iago Toral Quiroga <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs_builder.h b/src/mesa/drivers/dri/i965/brw_fs_builder.h
index 9a3cc3a50c2..268ecc6f4ac 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_builder.h
+++ b/src/mesa/drivers/dri/i965/brw_fs_builder.h
@@ -557,8 +557,12 @@ namespace brw {
       {
          instruction *inst = emit(SHADER_OPCODE_LOAD_PAYLOAD, dst, src, sources);
          inst->header_size = header_size;
-         inst->regs_written = header_size +
-                              (sources - header_size) * (dispatch_width() / 8);
+         inst->regs_written = header_size;
+         for (unsigned i = header_size; i < sources; i++) {
+            inst->regs_written +=
+               DIV_ROUND_UP(dispatch_width() * type_sz(src[i].type) *
+                            dst.stride, REG_SIZE);
+         }
 
          return inst;
       }