diff --git a/src/gallium/auxiliary/nir/tgsi_to_nir.c b/src/gallium/auxiliary/nir/tgsi_to_nir.c
index d5a6c9b4494..929012db59e 100644
--- a/src/gallium/auxiliary/nir/tgsi_to_nir.c
+++ b/src/gallium/auxiliary/nir/tgsi_to_nir.c
@@ -97,6 +97,7 @@ struct ttn_compile {
    bool cap_samplers_as_deref;
    bool cap_integers;
    bool cap_compact_arrays;
+   bool cap_tg4_component_in_swizzle;
 };
 
 #define ttn_swizzle(b, src, x, y, z, w) \
@@ -1229,6 +1230,13 @@ ttn_tex(struct ttn_compile *c, nir_def **src)
       op = nir_texop_lod;
       num_srcs = 1;
       break;
+   case TGSI_OPCODE_TG4:
+      /* TODO: Shadow cube samplers unsupported. */
+      assert(tgsi_inst->Texture.Texture != TGSI_TEXTURE_SHADOWCUBE_ARRAY);
+      op = nir_texop_tg4;
+      num_srcs = 1;
+      samp = 2;
+      break;
 
    default:
       fprintf(stderr, "unknown TGSI tex op %d\n", tgsi_inst->Instruction.Opcode);
@@ -1362,6 +1370,13 @@ ttn_tex(struct ttn_compile *c, nir_def **src)
       src_number++;
    }
 
+   if (tgsi_inst->Instruction.Opcode == TGSI_OPCODE_TG4) {
+      if (c->cap_tg4_component_in_swizzle)
+         instr->component = tgsi_inst->Src[samp].Register.SwizzleX;
+      else
+         instr->component = nir_scalar_as_uint(nir_scalar_resolved(src[1], 0));
+   }
+
    if (instr->is_shadow) {
       if (instr->coord_components == 4)
          instr->src[src_number].src = nir_src_for_ssa(ttn_channel(b, src[1], X));
@@ -2192,6 +2207,8 @@ ttn_read_pipe_caps(struct ttn_compile *c,
    c->cap_point_is_sysval = screen->get_param(screen, PIPE_CAP_FS_POINT_IS_SYSVAL);
    c->cap_integers = screen->get_shader_param(screen, c->scan->processor, PIPE_SHADER_CAP_INTEGERS);
    c->cap_compact_arrays = screen->get_param(screen, PIPE_CAP_NIR_COMPACT_ARRAYS);
+   c->cap_tg4_component_in_swizzle =
+       screen->get_param(screen, PIPE_CAP_TGSI_TG4_COMPONENT_IN_SWIZZLE);
 }
 
 #define BITSET_SET32(bitset, u32_mask) do { \