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i965/fs: emit DIM instruction to load 64-bit immediates in HSW

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v2 (Matt):
- Use brw_imm_df() as source argument of DIM instruction.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Samuel Iglesias Gonsálvez 2016-07-07 09:19:43 +02:00
parent 0534863c47
commit 94135e8736
1 changed files with 10 additions and 0 deletions
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10
src/mesa/drivers/dri/i965/brw_fs_nir.cpp
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@ -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.