[Mesa-dev] [PATCH 19/28] i965/fs: add nir_op_f2f*_{rtne,rtz}

[Samuel Iglesias Gonsálvez]

This way, we can implement its support later if SPIR-V supports it.
Right now, the RTZ, RTNE support in SPIR-V in FPRoundingMode only
applies to f2f16 conversions.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
---
 src/intel/compiler/brw_fs_nir.cpp | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp
index 7a4594a24ac..5f2f7ec419e 100644
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -801,6 +801,8 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
       inst->saturate = instr->dest.saturate;
       break;
 
+   case nir_op_f2f64_rtne:
+   case nir_op_f2f64_rtz:
    case nir_op_f2f64:
    case nir_op_f2i64:
    case nir_op_f2u64:
@@ -814,7 +816,23 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
        *    or a DWord integer type as an intermediate type."
        */
       if (nir_src_bit_size(instr->src[0].src) == 16) {
-         fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_F, 1);
+         brw_reg_type type;
+         switch (instr->op) {
+         case nir_op_f2f64:
+         case nir_op_f2f64_rtne:
+         case nir_op_f2f64_rtz:
+            type = BRW_REGISTER_TYPE_F;
+            break;
+         case nir_op_f2i64:
+            type = BRW_REGISTER_TYPE_D;
+            break;
+         case nir_op_f2u64:
+            type = BRW_REGISTER_TYPE_UD;
+            break;
+         default:
+            unreachable("Not supported");
+         }
+         fs_reg tmp = bld.vgrf(type, 1);
          inst = bld.MOV(tmp, op[0]);
          inst->saturate = instr->dest.saturate;
          op[0] = tmp;
@@ -978,6 +996,8 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
       }
       /* Fallthrough */
 
+   case nir_op_f2f32_rtne:
+   case nir_op_f2f32_rtz:
    case nir_op_f2f32:
    case nir_op_f2i32:
    case nir_op_f2u32:
-- 
2.19.1