Mesa (master): spirv: add support for SpvOpFragment{Mask}FetchAMD operations

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Module: Mesa
Branch: master
Commit: 76a34f5d3f63e2c672dcd66681040ce6fd95a51c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=76a34f5d3f63e2c672dcd66681040ce6fd95a51c

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Tue Jan  7 08:45:24 2020 +0100

spirv: add support for SpvOpFragment{Mask}FetchAMD operations

nir_tex_src_ms_index is re-used for the fragment index with
nir_texop_fragment_fetch to avoid introducing a new texture source type.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3304>

---

 src/compiler/spirv/spirv_to_nir.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/compiler/spirv/spirv_to_nir.c b/src/compiler/spirv/spirv_to_nir.c
index 5e2ed6c27eb..abf27d5e6b0 100644
--- a/src/compiler/spirv/spirv_to_nir.c
+++ b/src/compiler/spirv/spirv_to_nir.c
@@ -2346,6 +2346,14 @@ vtn_handle_texture(struct vtn_builder *b, SpvOp opcode,
       dest_type = nir_type_int;
       break;
 
+   case SpvOpFragmentFetchAMD:
+      texop = nir_texop_fragment_fetch;
+      break;
+
+   case SpvOpFragmentMaskFetchAMD:
+      texop = nir_texop_fragment_mask_fetch;
+      break;
+
    default:
       vtn_fail_with_opcode("Unhandled opcode", opcode);
    }
@@ -2377,6 +2385,8 @@ vtn_handle_texture(struct vtn_builder *b, SpvOp opcode,
    case nir_texop_query_levels:
    case nir_texop_texture_samples:
    case nir_texop_samples_identical:
+   case nir_texop_fragment_fetch:
+   case nir_texop_fragment_mask_fetch:
       /* These don't */
       break;
    case nir_texop_txf_ms_fb:
@@ -2404,7 +2414,9 @@ vtn_handle_texture(struct vtn_builder *b, SpvOp opcode,
    case SpvOpImageFetch:
    case SpvOpImageGather:
    case SpvOpImageDrefGather:
-   case SpvOpImageQueryLod: {
+   case SpvOpImageQueryLod:
+   case SpvOpFragmentFetchAMD:
+   case SpvOpFragmentMaskFetchAMD: {
       /* All these types have the coordinate as their first real argument */
       switch (sampler_dim) {
       case GLSL_SAMPLER_DIM_1D:
@@ -2414,6 +2426,7 @@ vtn_handle_texture(struct vtn_builder *b, SpvOp opcode,
       case GLSL_SAMPLER_DIM_2D:
       case GLSL_SAMPLER_DIM_RECT:
       case GLSL_SAMPLER_DIM_MS:
+      case GLSL_SAMPLER_DIM_SUBPASS_MS:
          coord_components = 2;
          break;
       case GLSL_SAMPLER_DIM_3D:
@@ -2482,6 +2495,10 @@ vtn_handle_texture(struct vtn_builder *b, SpvOp opcode,
    if (opcode == SpvOpImageQuerySizeLod)
       (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_lod);
 
+   /* For OpFragmentFetchAMD, we always have a multisample index */
+   if (opcode == SpvOpFragmentFetchAMD)
+      (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_ms_index);
+
    /* Now we need to handle some number of optional arguments */
    struct vtn_value *gather_offsets = NULL;
    if (idx < count) {
@@ -4797,6 +4814,11 @@ vtn_handle_body_instruction(struct vtn_builder *b, SpvOp opcode,
       break;
    }
 
+   case SpvOpFragmentMaskFetchAMD:
+   case SpvOpFragmentFetchAMD:
+      vtn_handle_texture(b, opcode, w, count);
+      break;
+
    case SpvOpAtomicLoad:
    case SpvOpAtomicExchange:
    case SpvOpAtomicCompareExchange: