Mesa (master): aco: implement 16-bit nir_op_ldexp

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Module: Mesa
Branch: master
Commit: 981ced07a542f94615b22762afa679af0605c692
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=981ced07a542f94615b22762afa679af0605c692

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Fri Apr  3 15:40:35 2020 +0200

aco: implement 16-bit nir_op_ldexp

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Daniel Schürmann <daniel at schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4452>

---

 src/amd/compiler/aco_instruction_selection.cpp | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/amd/compiler/aco_instruction_selection.cpp b/src/amd/compiler/aco_instruction_selection.cpp
index 480aecf42f1..b3f78a12f15 100644
--- a/src/amd/compiler/aco_instruction_selection.cpp
+++ b/src/amd/compiler/aco_instruction_selection.cpp
@@ -2048,14 +2048,16 @@ void visit_alu_instr(isel_context *ctx, nir_alu_instr *instr)
       break;
    }
    case nir_op_ldexp: {
-      if (dst.size() == 1) {
-         bld.vop3(aco_opcode::v_ldexp_f32, Definition(dst),
-                  as_vgpr(ctx, get_alu_src(ctx, instr->src[0])),
-                  get_alu_src(ctx, instr->src[1]));
-      } else if (dst.size() == 2) {
-         bld.vop3(aco_opcode::v_ldexp_f64, Definition(dst),
-                  as_vgpr(ctx, get_alu_src(ctx, instr->src[0])),
-                  get_alu_src(ctx, instr->src[1]));
+      Temp src0 = get_alu_src(ctx, instr->src[0]);
+      Temp src1 = get_alu_src(ctx, instr->src[1]);
+      if (dst.regClass() == v2b) {
+         Temp tmp = bld.tmp(v1);
+         emit_vop2_instruction(ctx, instr, aco_opcode::v_ldexp_f16, tmp, false);
+         bld.pseudo(aco_opcode::p_split_vector, Definition(dst), bld.def(v2b), tmp);
+      } else if (dst.regClass() == v1) {
+         bld.vop3(aco_opcode::v_ldexp_f32, Definition(dst), as_vgpr(ctx, src0), src1);
+      } else if (dst.regClass() == v2) {
+         bld.vop3(aco_opcode::v_ldexp_f64, Definition(dst), as_vgpr(ctx, src0), src1);
       } else {
          fprintf(stderr, "Unimplemented NIR instr bit size: ");
          nir_print_instr(&instr->instr, stderr);