Mesa (master): ac/nir: implement 16-bit pack/unpack opcodes

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Module: Mesa
Branch: master
Commit: f736250ab46908a2f6f01a721576c5ad2850835f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f736250ab46908a2f6f01a721576c5ad2850835f

Author: Rhys Perry <pendingchaos02 at gmail.com>
Date:   Thu Dec  6 14:40:23 2018 +0000

ac/nir: implement 16-bit pack/unpack opcodes

Signed-off-by: Rhys Perry <pendingchaos02 at gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>

---

 src/amd/common/ac_nir_to_llvm.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 37ef50fabaf..675623cbfeb 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -1034,6 +1034,30 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
 		break;
 	}
 
+	case nir_op_pack_32_2x16_split: {
+		LLVMValueRef tmp = ac_build_gather_values(&ctx->ac, src, 2);
+		result = LLVMBuildBitCast(ctx->ac.builder, tmp, ctx->ac.i32, "");
+		break;
+	}
+
+	case nir_op_unpack_32_2x16_split_x: {
+		LLVMValueRef tmp = LLVMBuildBitCast(ctx->ac.builder, src[0],
+						    ctx->ac.v2i16,
+						    "");
+		result = LLVMBuildExtractElement(ctx->ac.builder, tmp,
+						 ctx->ac.i32_0, "");
+		break;
+	}
+
+	case nir_op_unpack_32_2x16_split_y: {
+		LLVMValueRef tmp = LLVMBuildBitCast(ctx->ac.builder, src[0],
+						    ctx->ac.v2i16,
+						    "");
+		result = LLVMBuildExtractElement(ctx->ac.builder, tmp,
+						 ctx->ac.i32_1, "");
+		break;
+	}
+
 	case nir_op_cube_face_coord: {
 		src[0] = ac_to_float(&ctx->ac, src[0]);
 		LLVMValueRef results[2];