i965/vec4: split d2x conversion and data gathering from one opcode to two explicit ones

When doing a 64-bit to a smaller data type size conversion, the destination should
be aligned to 64-bits. Because of that, we need to gather the data after the
actual conversion.

Until now, these two operations were done by VEC4_OPCODE_FROM_DOUBLE but
now we split them explicitely in two different instructions:
VEC4_OPCODE_FROM_DOUBLE just do the conversion and
VEC4_OPCODE_PICK_LOW_32BIT will gather the data.

Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]>
Reviewed-by: Francisco Jerez <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/intel/compiler/brw_vec4_nir.cpp b/src/intel/compiler/brw_vec4_nir.cpp
index 6dd5789225d..64371a16de5 100644
--- a/src/intel/compiler/brw_vec4_nir.cpp
+++ b/src/intel/compiler/brw_vec4_nir.cpp
@@ -1191,6 +1191,7 @@ vec4_visitor::emit_conversion_from_double(dst_reg dst, src_reg src,
    emit(VEC4_OPCODE_FROM_DOUBLE, temp2, src_reg(temp))
       ->size_written = 2 * REG_SIZE;
 
+   emit(VEC4_OPCODE_PICK_LOW_32BIT, temp2, src_reg(retype(temp2, BRW_REGISTER_TYPE_DF)));
    vec4_instruction *inst = emit(MOV(dst, src_reg(temp2)));
    inst->saturate = saturate;
 }