From: Dave Airlie <airlied@redhat.com>
Date: Mon, 9 Mar 2020 23:51:17 +0000 (+1000)
Subject: gallivm/nir/tgsi: add multisample texture sampling.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ae95a08b9c366d5a8558e20c2c3a11558a9c0610;p=mesa.git

gallivm/nir/tgsi: add multisample texture sampling.

Both paths are required as u_blitter needs the TGSI path.

This just hooks the instructions up to the sampling code.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4122>
---

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_nir.c b/src/gallium/auxiliary/gallivm/lp_bld_nir.c
index 218d46036e9..48440f73da5 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_nir.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_nir.c
@@ -1492,7 +1492,7 @@ static void visit_tex(struct lp_build_nir_context *bld_base, nir_tex_instr *inst
    LLVMBuilderRef builder = gallivm->builder;
    LLVMValueRef coords[5];
    LLVMValueRef offsets[3] = { NULL };
-   LLVMValueRef explicit_lod = NULL, projector = NULL;
+   LLVMValueRef explicit_lod = NULL, projector = NULL, ms_index = NULL;
    struct lp_sampler_params params;
    struct lp_derivatives derivs;
    unsigned sample_key = 0;
@@ -1607,6 +1607,8 @@ static void visit_tex(struct lp_build_nir_context *bld_base, nir_tex_instr *inst
          break;
       }
       case nir_tex_src_ms_index:
+         sample_key |= LP_SAMPLER_FETCH_MS;
+         ms_index = cast_type(bld_base, get_src(bld_base, instr->src[i].src), nir_type_int, 32);
          break;
       default:
          assert(0);
@@ -1668,6 +1670,7 @@ static void visit_tex(struct lp_build_nir_context *bld_base, nir_tex_instr *inst
    params.coords = coords;
    params.texel = texel;
    params.lod = explicit_lod;
+   params.ms_index = ms_index;
    bld_base->tex(bld_base, &params);
    assign_dest(bld_base, &instr->dest, texel);
 }
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
index 67c7cc7b270..efdce32d2d2 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
@@ -2456,6 +2456,7 @@ emit_fetch_texels( struct lp_build_tgsi_soa_context *bld,
    LLVMValueRef explicit_lod = NULL;
    LLVMValueRef coords[5];
    LLVMValueRef offsets[3] = { NULL };
+   LLVMValueRef ms_index = NULL;
    struct lp_sampler_params params;
    enum lp_sampler_lod_property lod_property = LP_SAMPLER_LOD_SCALAR;
    unsigned dims, i;
@@ -2517,6 +2518,13 @@ emit_fetch_texels( struct lp_build_tgsi_soa_context *bld,
       explicit_lod = lp_build_emit_fetch(&bld->bld_base, inst, 0, 3);
       lod_property = lp_build_lod_property(&bld->bld_base, inst, 0);
    }
+
+   if (target == TGSI_TEXTURE_2D_MSAA ||
+       target == TGSI_TEXTURE_2D_ARRAY_MSAA) {
+      sample_key |= LP_SAMPLER_FETCH_MS;
+      ms_index = lp_build_emit_fetch(&bld->bld_base, inst, 0, 3);
+   }
+
    /*
     * XXX: for real msaa support, the w component (or src2.x for sample_i_ms)
     * would be the sample index.
@@ -2557,6 +2565,7 @@ emit_fetch_texels( struct lp_build_tgsi_soa_context *bld,
    params.derivs = NULL;
    params.lod = explicit_lod;
    params.texel = texel;
+   params.ms_index = ms_index;
 
    bld->sampler->emit_tex_sample(bld->sampler,
                                  bld->bld_base.base.gallivm,