i965/fs: add a helper function to create double immediates

Gen7 hardware does not support double immediates so these need
to be moved in 32-bit chunks to a regular vgrf instead. Instead
of doing this every time we need to create a DF immediate,
create a helper function that does the right thing depending
on the hardware generation.

v2:
- Define setup_imm_df() as an independent function (Curro)
- Create a specific builder to get rid of some instruction field
  assignments (Curro).

v3:
- Get devinfo from builder (Kenneth)

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h
index 1f88f8f..ca977d4 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.h
+++ b/src/mesa/drivers/dri/i965/brw_fs.h
@@ -512,3 +512,5 @@ void shuffle_64bit_data_for_32bit_write(const brw::fs_builder &bld,
                                         const fs_reg &dst,
                                         const fs_reg &src,
                                         uint32_t components);
+fs_reg setup_imm_df(const brw::fs_builder &bld,
+                    double v);