From 4f90e818c8678a17203d5035c6e26427704e56db Mon Sep 17 00:00:00 2001
From: Erik Faye-Lund <erik.faye-lund@collabora.com>
Date: Mon, 3 Feb 2020 17:39:37 +0100
Subject: [PATCH] zink: implement nir_texop_txf_ms

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5159>
---
 .../drivers/zink/nir_to_spirv/nir_to_spirv.c  | 17 +++++++++++----
 .../drivers/zink/nir_to_spirv/spirv_builder.c | 21 ++++++++++++++-----
 .../drivers/zink/nir_to_spirv/spirv_builder.h |  3 ++-
 3 files changed, 31 insertions(+), 10 deletions(-)

diff --git a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
index ccd5aa737bd..09a5d6b607a 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
+++ b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
@@ -1490,16 +1490,18 @@ emit_tex(struct ntv_context *ctx, nir_tex_instr *tex)
           tex->op == nir_texop_txl ||
           tex->op == nir_texop_txd ||
           tex->op == nir_texop_txf ||
+          tex->op == nir_texop_txf_ms ||
           tex->op == nir_texop_txs);
    assert(tex->texture_index == tex->sampler_index);
 
    SpvId coord = 0, proj = 0, bias = 0, lod = 0, dref = 0, dx = 0, dy = 0,
-         offset = 0;
+         offset = 0, sample = 0;
    unsigned coord_components = 0;
    for (unsigned i = 0; i < tex->num_srcs; i++) {
       switch (tex->src[i].src_type) {
       case nir_tex_src_coord:
-         if (tex->op == nir_texop_txf)
+         if (tex->op == nir_texop_txf ||
+             tex->op == nir_texop_txf_ms)
             coord = get_src_int(ctx, &tex->src[i].src);
          else
             coord = get_src_float(ctx, &tex->src[i].src);
@@ -1525,6 +1527,7 @@ emit_tex(struct ntv_context *ctx, nir_tex_instr *tex)
       case nir_tex_src_lod:
          assert(nir_src_num_components(tex->src[i].src) == 1);
          if (tex->op == nir_texop_txf ||
+             tex->op == nir_texop_txf_ms ||
              tex->op == nir_texop_txs)
             lod = get_src_int(ctx, &tex->src[i].src);
          else
@@ -1532,6 +1535,11 @@ emit_tex(struct ntv_context *ctx, nir_tex_instr *tex)
          assert(lod != 0);
          break;
 
+      case nir_tex_src_ms_index:
+         assert(nir_src_num_components(tex->src[i].src) == 1);
+         sample = get_src_int(ctx, &tex->src[i].src);
+         break;
+
       case nir_tex_src_comparator:
          assert(nir_src_num_components(tex->src[i].src) == 1);
          dref = get_src_float(ctx, &tex->src[i].src);
@@ -1606,10 +1614,11 @@ emit_tex(struct ntv_context *ctx, nir_tex_instr *tex)
       actual_dest_type = spirv_builder_type_float(&ctx->builder, 32);
 
    SpvId result;
-   if (tex->op == nir_texop_txf) {
+   if (tex->op == nir_texop_txf ||
+       tex->op == nir_texop_txf_ms) {
       SpvId image = spirv_builder_emit_image(&ctx->builder, image_type, load);
       result = spirv_builder_emit_image_fetch(&ctx->builder, dest_type,
-                                              image, coord, lod);
+                                              image, coord, lod, sample);
    } else {
       result = spirv_builder_emit_image_sample(&ctx->builder,
                                                actual_dest_type, load,
diff --git a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c
index 101eed1aafa..bc5d08091b1 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c
+++ b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c
@@ -597,16 +597,27 @@ spirv_builder_emit_image_fetch(struct spirv_builder *b,
                                SpvId result_type,
                                SpvId image,
                                SpvId coordinate,
-                               SpvId lod)
+                               SpvId lod,
+                               SpvId sample)
 {
    SpvId result = spirv_builder_new_id(b);
 
-   SpvId extra_operands[2];
+   SpvImageOperandsMask operand_mask = SpvImageOperandsMaskNone;
+   SpvId extra_operands[3];
    int num_extra_operands = 0;
    if (lod) {
-      extra_operands[0] = SpvImageOperandsLodMask;
-      extra_operands[1] = lod;
-      num_extra_operands = 2;
+      extra_operands[++num_extra_operands] = lod;
+      operand_mask |= SpvImageOperandsLodMask;
+   }
+   if (sample) {
+      extra_operands[++num_extra_operands] = sample;
+      operand_mask |= SpvImageOperandsSampleMask;
+   }
+
+   /* finalize num_extra_operands / extra_operands */
+   if (num_extra_operands > 0) {
+      extra_operands[0] = operand_mask;
+      num_extra_operands++;
    }
 
    spirv_buffer_prepare(&b->instructions, 5 + num_extra_operands);
diff --git a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h
index d0843b8ff79..9d29699127c 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h
+++ b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h
@@ -230,7 +230,8 @@ spirv_builder_emit_image_fetch(struct spirv_builder *b,
                                SpvId result_type,
                                SpvId image,
                                SpvId coordinate,
-                               SpvId lod);
+                               SpvId lod,
+                               SpvId sample);
 
 SpvId
 spirv_builder_emit_image_query_size(struct spirv_builder *b,
-- 
2.30.2