swr: support samplers in vertex shaders

Reviewed-by: George Kyriazis <[email protected]>

6 files changed, 228 insertions, 105 deletions

diff --git a/src/gallium/drivers/swr/swr_shader.cpp b/src/gallium/drivers/swr/swr_shader.cpp
index ff16d0f2f11..90f0f22a6a2 100644
--- a/src/gallium/drivers/swr/swr_shader.cpp
+++ b/src/gallium/drivers/swr/swr_shader.cpp
@@ -40,32 +40,29 @@
 #include "swr_state.h"
 #include "swr_screen.h"
 
-bool operator==(const swr_jit_key &lhs, const swr_jit_key &rhs)
+bool operator==(const swr_jit_fs_key &lhs, const swr_jit_fs_key &rhs)
 {
    return !memcmp(&lhs, &rhs, sizeof(lhs));
 }
 
-void
-swr_generate_fs_key(struct swr_jit_key &key,
-                    struct swr_context *ctx,
-                    swr_fragment_shader *swr_fs)
+bool operator==(const swr_jit_vs_key &lhs, const swr_jit_vs_key &rhs)
 {
-   key.nr_cbufs = ctx->framebuffer.nr_cbufs;
-   key.light_twoside = ctx->rasterizer->light_twoside;
-   memcpy(&key.vs_output_semantic_name,
-          &ctx->vs->info.base.output_semantic_name,
-          sizeof(key.vs_output_semantic_name));
-   memcpy(&key.vs_output_semantic_idx,
-          &ctx->vs->info.base.output_semantic_index,
-          sizeof(key.vs_output_semantic_idx));
+   return !memcmp(&lhs, &rhs, sizeof(lhs));
+}
 
-   key.nr_samplers = swr_fs->info.base.file_max[TGSI_FILE_SAMPLER] + 1;
+static void
+swr_generate_sampler_key(const struct lp_tgsi_info &info,
+                         struct swr_context *ctx,
+                         unsigned shader_type,
+                         struct swr_jit_sampler_key &key)
+{
+   key.nr_samplers = info.base.file_max[TGSI_FILE_SAMPLER] + 1;
 
    for (unsigned i = 0; i < key.nr_samplers; i++) {
-      if (swr_fs->info.base.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) {
+      if (info.base.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) {
          lp_sampler_static_sampler_state(
             &key.sampler[i].sampler_state,
-            ctx->samplers[PIPE_SHADER_FRAGMENT][i]);
+            ctx->samplers[shader_type][i]);
       }
    }
 
@@ -74,28 +71,57 @@ swr_generate_fs_key(struct swr_jit_key &key,
     * are dx10-style? Can't really have mixed opcodes, at least not
     * if we want to skip the holes here (without rescanning tgsi).
     */
-   if (swr_fs->info.base.file_max[TGSI_FILE_SAMPLER_VIEW] != -1) {
+   if (info.base.file_max[TGSI_FILE_SAMPLER_VIEW] != -1) {
       key.nr_sampler_views =
-         swr_fs->info.base.file_max[TGSI_FILE_SAMPLER_VIEW] + 1;
+         info.base.file_max[TGSI_FILE_SAMPLER_VIEW] + 1;
       for (unsigned i = 0; i < key.nr_sampler_views; i++) {
-         if (swr_fs->info.base.file_mask[TGSI_FILE_SAMPLER_VIEW] & (1 << i)) {
+         if (info.base.file_mask[TGSI_FILE_SAMPLER_VIEW] & (1 << i)) {
             lp_sampler_static_texture_state(
                &key.sampler[i].texture_state,
-               ctx->sampler_views[PIPE_SHADER_FRAGMENT][i]);
+               ctx->sampler_views[shader_type][i]);
          }
       }
    } else {
       key.nr_sampler_views = key.nr_samplers;
       for (unsigned i = 0; i < key.nr_sampler_views; i++) {
-         if (swr_fs->info.base.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) {
+         if (info.base.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) {
             lp_sampler_static_texture_state(
                &key.sampler[i].texture_state,
-               ctx->sampler_views[PIPE_SHADER_FRAGMENT][i]);
+               ctx->sampler_views[shader_type][i]);
          }
       }
    }
 }
 
+void
+swr_generate_fs_key(struct swr_jit_fs_key &key,
+                    struct swr_context *ctx,
+                    swr_fragment_shader *swr_fs)
+{
+   memset(&key, 0, sizeof(key));
+
+   key.nr_cbufs = ctx->framebuffer.nr_cbufs;
+   key.light_twoside = ctx->rasterizer->light_twoside;
+   memcpy(&key.vs_output_semantic_name,
+          &ctx->vs->info.base.output_semantic_name,
+          sizeof(key.vs_output_semantic_name));
+   memcpy(&key.vs_output_semantic_idx,
+          &ctx->vs->info.base.output_semantic_index,
+          sizeof(key.vs_output_semantic_idx));
+
+   swr_generate_sampler_key(swr_fs->info, ctx, PIPE_SHADER_FRAGMENT, key);
+}
+
+void
+swr_generate_vs_key(struct swr_jit_vs_key &key,
+                    struct swr_context *ctx,
+                    swr_vertex_shader *swr_vs)
+{
+   memset(&key, 0, sizeof(key));
+
+   swr_generate_sampler_key(swr_vs->info, ctx, PIPE_SHADER_VERTEX, key);
+}
+
 struct BuilderSWR : public Builder {
    BuilderSWR(JitManager *pJitMgr)
       : Builder(pJitMgr)
@@ -103,14 +129,15 @@ struct BuilderSWR : public Builder {
       pJitMgr->SetupNewModule();
    }
 
-   PFN_VERTEX_FUNC
-   CompileVS(struct pipe_context *ctx, swr_vertex_shader *swr_vs);
-   PFN_PIXEL_KERNEL CompileFS(struct swr_context *ctx, swr_jit_key &key);
+   PFN_VERTEX_FUNC CompileVS(struct swr_context *ctx, swr_jit_vs_key &key);
+   PFN_PIXEL_KERNEL CompileFS(struct swr_context *ctx, swr_jit_fs_key &key);
 };
 
 PFN_VERTEX_FUNC
-BuilderSWR::CompileVS(struct pipe_context *ctx, swr_vertex_shader *swr_vs)
+BuilderSWR::CompileVS(struct swr_context *ctx, swr_jit_vs_key &key)
 {
+   struct swr_vertex_shader *swr_vs = ctx->vs;
+
    swr_vs->linkageMask = 0;
 
    for (unsigned i = 0; i < swr_vs->info.base.num_outputs; i++) {
@@ -180,6 +207,9 @@ BuilderSWR::CompileVS(struct pipe_context *ctx, swr_vertex_shader *swr_vs)
       }
    }
 
+   struct lp_build_sampler_soa *sampler =
+      swr_sampler_soa_create(key.sampler, PIPE_SHADER_VERTEX);
+
    struct lp_bld_tgsi_system_values system_values;
    memset(&system_values, 0, sizeof(system_values));
    system_values.instance_id = wrap(LOAD(pVsCtx, {0, SWR_VS_CONTEXT_InstanceID}));
@@ -194,9 +224,9 @@ BuilderSWR::CompileVS(struct pipe_context *ctx, swr_vertex_shader *swr_vs)
                      &system_values,
                      inputs,
                      outputs,
-                     NULL, // wrap(hPrivateData), (sampler context)
+                     wrap(hPrivateData), // (sampler context)
                      NULL, // thread data
-                     NULL, // sampler
+                     sampler, // sampler
                      &swr_vs->info.base,
                      NULL); // geometry shader face
 
@@ -239,11 +269,11 @@ BuilderSWR::CompileVS(struct pipe_context *ctx, swr_vertex_shader *swr_vs)
 }
 
 PFN_VERTEX_FUNC
-swr_compile_vs(struct pipe_context *ctx, swr_vertex_shader *swr_vs)
+swr_compile_vs(struct swr_context *ctx, swr_jit_vs_key &key)
 {
    BuilderSWR builder(
-      reinterpret_cast<JitManager *>(swr_screen(ctx->screen)->hJitMgr));
-   return builder.CompileVS(ctx, swr_vs);
+      reinterpret_cast<JitManager *>(swr_screen(ctx->pipe.screen)->hJitMgr));
+   return builder.CompileVS(ctx, key);
 }
 
 static unsigned
@@ -269,7 +299,7 @@ locate_linkage(ubyte name, ubyte index, struct tgsi_shader_info *info)
 }
 
 PFN_PIXEL_KERNEL
-BuilderSWR::CompileFS(struct swr_context *ctx, swr_jit_key &key)
+BuilderSWR::CompileFS(struct swr_context *ctx, swr_jit_fs_key &key)
 {
    struct swr_fragment_shader *swr_fs = ctx->fs;
 
@@ -478,7 +508,7 @@ BuilderSWR::CompileFS(struct swr_context *ctx, swr_jit_key &key)
       }
    }
 
-   sampler = swr_sampler_soa_create(key.sampler);
+   sampler = swr_sampler_soa_create(key.sampler, PIPE_SHADER_FRAGMENT);
 
    struct lp_bld_tgsi_system_values system_values;
    memset(&system_values, 0, sizeof(system_values));
@@ -583,7 +613,7 @@ BuilderSWR::CompileFS(struct swr_context *ctx, swr_jit_key &key)
 }
 
 PFN_PIXEL_KERNEL
-swr_compile_fs(struct swr_context *ctx, swr_jit_key &key)
+swr_compile_fs(struct swr_context *ctx, swr_jit_fs_key &key)
 {
    BuilderSWR builder(
       reinterpret_cast<JitManager *>(swr_screen(ctx->pipe.screen)->hJitMgr));
diff --git a/src/gallium/drivers/swr/swr_shader.h b/src/gallium/drivers/swr/swr_shader.h
index e22a7c48c2a..4814b9d914c 100644
--- a/src/gallium/drivers/swr/swr_shader.h
+++ b/src/gallium/drivers/swr/swr_shader.h
@@ -25,36 +25,55 @@
 
 class swr_vertex_shader;
 class swr_fragment_shader;
-class swr_jit_key;
+class swr_jit_fs_key;
+class swr_jit_vs_key;
 
 PFN_VERTEX_FUNC
-swr_compile_vs(struct pipe_context *ctx, swr_vertex_shader *swr_vs);
+swr_compile_vs(struct swr_context *ctx, swr_jit_vs_key &key);
 
 PFN_PIXEL_KERNEL
-swr_compile_fs(struct swr_context *ctx, swr_jit_key &key);
+swr_compile_fs(struct swr_context *ctx, swr_jit_fs_key &key);
 
-void swr_generate_fs_key(struct swr_jit_key &key,
+void swr_generate_fs_key(struct swr_jit_fs_key &key,
                          struct swr_context *ctx,
                          swr_fragment_shader *swr_fs);
 
-struct swr_jit_key {
+void swr_generate_vs_key(struct swr_jit_vs_key &key,
+                         struct swr_context *ctx,
+                         swr_vertex_shader *swr_vs);
+
+struct swr_jit_sampler_key {
+   unsigned nr_samplers;
+   unsigned nr_sampler_views;
+   struct swr_sampler_static_state sampler[PIPE_MAX_SHADER_SAMPLER_VIEWS];
+};
+
+struct swr_jit_fs_key : swr_jit_sampler_key {
    unsigned nr_cbufs;
    unsigned light_twoside;
    ubyte vs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
    ubyte vs_output_semantic_idx[PIPE_MAX_SHADER_OUTPUTS];
-   unsigned nr_samplers;
-   unsigned nr_sampler_views;
-   struct swr_sampler_static_state sampler[PIPE_MAX_SHADER_SAMPLER_VIEWS];
+};
+
+struct swr_jit_vs_key : swr_jit_sampler_key {
 };
 
 namespace std
 {
-template <> struct hash<swr_jit_key> {
-   std::size_t operator()(const swr_jit_key &k) const
+template <> struct hash<swr_jit_fs_key> {
+   std::size_t operator()(const swr_jit_fs_key &k) const
+   {
+      return util_hash_crc32(&k, sizeof(k));
+   }
+};
+
+template <> struct hash<swr_jit_vs_key> {
+   std::size_t operator()(const swr_jit_vs_key &k) const
    {
       return util_hash_crc32(&k, sizeof(k));
    }
 };
 };
 
-bool operator==(const swr_jit_key &lhs, const swr_jit_key &rhs);
+bool operator==(const swr_jit_fs_key &lhs, const swr_jit_fs_key &rhs);
+bool operator==(const swr_jit_vs_key &lhs, const swr_jit_vs_key &rhs);
diff --git a/src/gallium/drivers/swr/swr_state.cpp b/src/gallium/drivers/swr/swr_state.cpp
index e7bf3618a7d..ded51a9b196 100644
--- a/src/gallium/drivers/swr/swr_state.cpp
+++ b/src/gallium/drivers/swr/swr_state.cpp
@@ -317,8 +317,7 @@ static void *
 swr_create_vs_state(struct pipe_context *pipe,
                     const struct pipe_shader_state *vs)
 {
-   struct swr_vertex_shader *swr_vs =
-      (swr_vertex_shader *)CALLOC_STRUCT(swr_vertex_shader);
+   struct swr_vertex_shader *swr_vs = new swr_vertex_shader;
    if (!swr_vs)
       return NULL;
 
@@ -327,8 +326,6 @@ swr_create_vs_state(struct pipe_context *pipe,
 
    lp_build_tgsi_info(vs->tokens, &swr_vs->info);
 
-   swr_vs->func = swr_compile_vs(pipe, swr_vs);
-
    swr_vs->soState = {0};
 
    if (swr_vs->pipe.stream_output.num_outputs) {
@@ -368,7 +365,7 @@ swr_delete_vs_state(struct pipe_context *pipe, void *vs)
 {
    struct swr_vertex_shader *swr_vs = (swr_vertex_shader *)vs;
    FREE((void *)swr_vs->pipe.tokens);
-   FREE(vs);
+   delete swr_vs;
 }
 
 static void *
@@ -675,6 +672,58 @@ swr_update_resource_status(struct pipe_context *pipe,
    }
 }
 
+static void
+swr_update_texture_state(struct swr_context *ctx,
+                         unsigned shader_type,
+                         unsigned num_sampler_views,
+                         swr_jit_texture *textures)
+{
+   for (unsigned i = 0; i < num_sampler_views; i++) {
+      struct pipe_sampler_view *view =
+         ctx->sampler_views[shader_type][i];
+
+      if (view) {
+         struct pipe_resource *res = view->texture;
+         struct swr_resource *swr_res = swr_resource(res);
+         struct swr_jit_texture *jit_tex = &textures[i];
+         memset(jit_tex, 0, sizeof(*jit_tex));
+         jit_tex->width = res->width0;
+         jit_tex->height = res->height0;
+         jit_tex->depth = res->depth0;
+         jit_tex->first_level = view->u.tex.first_level;
+         jit_tex->last_level = view->u.tex.last_level;
+         jit_tex->base_ptr = swr_res->swr.pBaseAddress;
+
+         for (unsigned level = jit_tex->first_level;
+              level <= jit_tex->last_level;
+              level++) {
+            jit_tex->row_stride[level] = swr_res->row_stride[level];
+            jit_tex->img_stride[level] = swr_res->img_stride[level];
+            jit_tex->mip_offsets[level] = swr_res->mip_offsets[level];
+         }
+      }
+   }
+}
+
+static void
+swr_update_sampler_state(struct swr_context *ctx,
+                         unsigned shader_type,
+                         unsigned num_samplers,
+                         swr_jit_sampler *samplers)
+{
+   for (unsigned i = 0; i < num_samplers; i++) {
+      const struct pipe_sampler_state *sampler =
+         ctx->samplers[shader_type][i];
+
+      if (sampler) {
+         samplers[i].min_lod = sampler->min_lod;
+         samplers[i].max_lod = sampler->max_lod;
+         samplers[i].lod_bias = sampler->lod_bias;
+         COPY_4V(samplers[i].border_color, sampler->border_color.f);
+      }
+   }
+}
+
 void
 swr_update_derived(struct pipe_context *pipe,
                    const struct pipe_draw_info *p_draw_info)
@@ -974,14 +1023,43 @@ swr_update_derived(struct pipe_context *pipe,
    }
 
    /* VertexShader */
-   if (ctx->dirty & (SWR_NEW_VS | SWR_NEW_FRAMEBUFFER)) {
-      SwrSetVertexFunc(ctx->swrContext, ctx->vs->func);
+   if (ctx->dirty & (SWR_NEW_VS |
+                     SWR_NEW_SAMPLER |
+                     SWR_NEW_SAMPLER_VIEW |
+                     SWR_NEW_FRAMEBUFFER)) {
+      swr_jit_vs_key key;
+      swr_generate_vs_key(key, ctx, ctx->vs);
+      auto search = ctx->vs->map.find(key);
+      PFN_VERTEX_FUNC func;
+      if (search != ctx->vs->map.end()) {
+         func = search->second;
+      } else {
+         func = swr_compile_vs(ctx, key);
+         ctx->vs->map.insert(std::make_pair(key, func));
+      }
+      SwrSetVertexFunc(ctx->swrContext, func);
+
+      /* JIT sampler state */
+      if (ctx->dirty & SWR_NEW_SAMPLER) {
+         swr_update_sampler_state(ctx,
+                                  PIPE_SHADER_VERTEX,
+                                  key.nr_samplers,
+                                  ctx->swrDC.samplersVS);
+      }
+
+      /* JIT sampler view state */
+      if (ctx->dirty & (SWR_NEW_SAMPLER_VIEW | SWR_NEW_FRAMEBUFFER)) {
+         swr_update_texture_state(ctx,
+                                  PIPE_SHADER_VERTEX,
+                                  key.nr_sampler_views,
+                                  ctx->swrDC.texturesVS);
+      }
    }
 
-   swr_jit_key key;
+   /* FragmentShader */
    if (ctx->dirty & (SWR_NEW_FS | SWR_NEW_SAMPLER | SWR_NEW_SAMPLER_VIEW
                      | SWR_NEW_RASTERIZER | SWR_NEW_FRAMEBUFFER)) {
-      memset(&key, 0, sizeof(key));
+      swr_jit_fs_key key;
       swr_generate_fs_key(key, ctx, ctx->fs);
       auto search = ctx->fs->map.find(key);
       PFN_PIXEL_KERNEL func;
@@ -1031,56 +1109,25 @@ swr_update_derived(struct pipe_context *pipe,
       psState.usesUAV = false; // XXX
       psState.forceEarlyZ = false;
       SwrSetPixelShaderState(ctx->swrContext, &psState);
-   }
-
-   /* JIT sampler state */
-   if (ctx->dirty & SWR_NEW_SAMPLER) {
-      swr_draw_context *pDC = &ctx->swrDC;
 
-      for (unsigned i = 0; i < key.nr_samplers; i++) {
-         const struct pipe_sampler_state *sampler =
-            ctx->samplers[PIPE_SHADER_FRAGMENT][i];
-
-         if (sampler) {
-            pDC->samplersFS[i].min_lod = sampler->min_lod;
-            pDC->samplersFS[i].max_lod = sampler->max_lod;
-            pDC->samplersFS[i].lod_bias = sampler->lod_bias;
-            COPY_4V(pDC->samplersFS[i].border_color, sampler->border_color.f);
-         }
+      /* JIT sampler state */
+      if (ctx->dirty & SWR_NEW_SAMPLER) {
+         swr_update_sampler_state(ctx,
+                                  PIPE_SHADER_FRAGMENT,
+                                  key.nr_samplers,
+                                  ctx->swrDC.samplersFS);
       }
-   }
-
-   /* JIT sampler view state */
-   if (ctx->dirty & (SWR_NEW_SAMPLER_VIEW | SWR_NEW_FRAMEBUFFER)) {
-      swr_draw_context *pDC = &ctx->swrDC;
 
-      for (unsigned i = 0; i < key.nr_sampler_views; i++) {
-         struct pipe_sampler_view *view =
-            ctx->sampler_views[PIPE_SHADER_FRAGMENT][i];
-
-         if (view) {
-            struct pipe_resource *res = view->texture;
-            struct swr_resource *swr_res = swr_resource(res);
-            struct swr_jit_texture *jit_tex = &pDC->texturesFS[i];
-            memset(jit_tex, 0, sizeof(*jit_tex));
-            jit_tex->width = res->width0;
-            jit_tex->height = res->height0;
-            jit_tex->depth = res->depth0;
-            jit_tex->first_level = view->u.tex.first_level;
-            jit_tex->last_level = view->u.tex.last_level;
-            jit_tex->base_ptr = swr_res->swr.pBaseAddress;
-
-            for (unsigned level = jit_tex->first_level;
-                 level <= jit_tex->last_level;
-                 level++) {
-               jit_tex->row_stride[level] = swr_res->row_stride[level];
-               jit_tex->img_stride[level] = swr_res->img_stride[level];
-               jit_tex->mip_offsets[level] = swr_res->mip_offsets[level];
-            }
-         }
+      /* JIT sampler view state */
+      if (ctx->dirty & (SWR_NEW_SAMPLER_VIEW | SWR_NEW_FRAMEBUFFER)) {
+         swr_update_texture_state(ctx,
+                                  PIPE_SHADER_FRAGMENT,
+                                  key.nr_sampler_views,
+                                  ctx->swrDC.texturesFS);
       }
    }
 
+
    /* VertexShader Constants */
    if (ctx->dirty & SWR_NEW_VSCONSTANTS) {
       swr_draw_context *pDC = &ctx->swrDC;
diff --git a/src/gallium/drivers/swr/swr_state.h b/src/gallium/drivers/swr/swr_state.h
index f0a7ff3b185..32a5441295b 100644
--- a/src/gallium/drivers/swr/swr_state.h
+++ b/src/gallium/drivers/swr/swr_state.h
@@ -40,9 +40,9 @@ struct swr_vertex_shader {
    struct pipe_shader_state pipe;
    struct lp_tgsi_info info;
    unsigned linkageMask;
-   PFN_VERTEX_FUNC func;
+   std::unordered_map<swr_jit_vs_key, PFN_VERTEX_FUNC> map;
    SWR_STREAMOUT_STATE soState;
-   PFN_SO_FUNC soFunc[PIPE_PRIM_MAX];
+   PFN_SO_FUNC soFunc[PIPE_PRIM_MAX] {0};
 };
 
 struct swr_fragment_shader {
@@ -50,7 +50,7 @@ struct swr_fragment_shader {
    struct lp_tgsi_info info;
    uint32_t constantMask;
    uint32_t pointSpriteMask;
-   std::unordered_map<swr_jit_key, PFN_PIXEL_KERNEL> map;
+   std::unordered_map<swr_jit_fs_key, PFN_PIXEL_KERNEL> map;
 };
 
 /* Vertex element state */
diff --git a/src/gallium/drivers/swr/swr_tex_sample.cpp b/src/gallium/drivers/swr/swr_tex_sample.cpp
index 8e01e32e280..8172c820f22 100644
--- a/src/gallium/drivers/swr/swr_tex_sample.cpp
+++ b/src/gallium/drivers/swr/swr_tex_sample.cpp
@@ -72,6 +72,8 @@ struct swr_sampler_dynamic_state {
    struct lp_sampler_dynamic_state base;
 
    const struct swr_sampler_static_state *static_state;
+
+   unsigned shader_type;
 };
 
 
@@ -112,7 +114,18 @@ swr_texture_member(const struct lp_sampler_dynamic_state *base,
    /* context[0] */
    indices[0] = lp_build_const_int32(gallivm, 0);
    /* context[0].textures */
-   indices[1] = lp_build_const_int32(gallivm, swr_draw_context_texturesFS);
+   auto dynamic = (const struct swr_sampler_dynamic_state *)base;
+   switch (dynamic->shader_type) {
+   case PIPE_SHADER_FRAGMENT:
+      indices[1] = lp_build_const_int32(gallivm, swr_draw_context_texturesFS);
+      break;
+   case PIPE_SHADER_VERTEX:
+      indices[1] = lp_build_const_int32(gallivm, swr_draw_context_texturesVS);
+      break;
+   default:
+      assert(0 && "unsupported shader type");
+      break;
+   }
    /* context[0].textures[unit] */
    indices[2] = lp_build_const_int32(gallivm, texture_unit);
    /* context[0].textures[unit].member */
@@ -195,7 +208,18 @@ swr_sampler_member(const struct lp_sampler_dynamic_state *base,
    /* context[0] */
    indices[0] = lp_build_const_int32(gallivm, 0);
    /* context[0].samplers */
-   indices[1] = lp_build_const_int32(gallivm, swr_draw_context_samplersFS);
+   auto dynamic = (const struct swr_sampler_dynamic_state *)base;
+   switch (dynamic->shader_type) {
+   case PIPE_SHADER_FRAGMENT:
+      indices[1] = lp_build_const_int32(gallivm, swr_draw_context_samplersFS);
+      break;
+   case PIPE_SHADER_VERTEX:
+      indices[1] = lp_build_const_int32(gallivm, swr_draw_context_samplersVS);
+      break;
+   default:
+      assert(0 && "unsupported shader type");
+      break;
+   }
    /* context[0].samplers[unit] */
    indices[2] = lp_build_const_int32(gallivm, sampler_unit);
    /* context[0].samplers[unit].member */
@@ -307,7 +331,8 @@ swr_sampler_soa_emit_size_query(const struct lp_build_sampler_soa *base,
 
 
 struct lp_build_sampler_soa *
-swr_sampler_soa_create(const struct swr_sampler_static_state *static_state)
+swr_sampler_soa_create(const struct swr_sampler_static_state *static_state,
+                       unsigned shader_type)
 {
    struct swr_sampler_soa *sampler;
 
@@ -334,5 +359,7 @@ swr_sampler_soa_create(const struct swr_sampler_static_state *static_state)
 
    sampler->dynamic_state.static_state = static_state;
 
+   sampler->dynamic_state.shader_type = shader_type;
+
    return &sampler->base;
 }
diff --git a/src/gallium/drivers/swr/swr_tex_sample.h b/src/gallium/drivers/swr/swr_tex_sample.h
index f5c368c108d..cb7e83d1c39 100644
--- a/src/gallium/drivers/swr/swr_tex_sample.h
+++ b/src/gallium/drivers/swr/swr_tex_sample.h
@@ -44,4 +44,4 @@ struct swr_sampler_static_state {
  *
  */
 struct lp_build_sampler_soa *
-swr_sampler_soa_create(const struct swr_sampler_static_state *key);
+swr_sampler_soa_create(const struct swr_sampler_static_state *key, unsigned shader_type);