Mesa (master): i965/fs: emit DIM instruction to load 64-bit immediates in HSW
Samuel Iglesias Gonsálvez
samuelig at kemper.freedesktop.org
Thu Jul 14 06:12:20 UTC 2016
Module: Mesa
Branch: master
Commit: 94135e8736f2741684e978afac9d34c368f7bcb1
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=94135e8736f2741684e978afac9d34c368f7bcb1
Author: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
Date: Thu Jul 7 09:19:43 2016 +0200
i965/fs: emit DIM instruction to load 64-bit immediates in HSW
v2 (Matt):
- Use brw_imm_df() as source argument of DIM instruction.
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
Reviewed-by: Matt Turner <mattst88 at gmail.com>
---
src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index a65c273..129984a 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -4558,6 +4558,16 @@ setup_imm_df(const fs_builder &bld, double v)
if (devinfo->gen >= 8)
return brw_imm_df(v);
+ /* gen7.5 does not support DF immediates straighforward but the DIM
+ * instruction allows to set the 64-bit immediate value.
+ */
+ if (devinfo->is_haswell) {
+ const fs_builder ubld = bld.exec_all();
+ fs_reg dst = ubld.vgrf(BRW_REGISTER_TYPE_DF, 1);
+ ubld.DIM(dst, brw_imm_df(v));
+ return component(dst, 0);
+ }
+
/* gen7 does not support DF immediates, so we generate a 64-bit constant by
* writing the low 32-bit of the constant to suboffset 0 of a VGRF and
* the high 32-bit to suboffset 4 and then applying a stride of 0.
More information about the mesa-commit
mailing list