add support for shader clock.

This was pretty trivial.

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>

src/gallium/auxiliary/tgsi/tgsi_info.c

@@ -262,7 +262,8 @@ static const struct tgsi_opcode_info opcode_info[TGSI_OPCODE_LAST] =
    { 1, 1, 0, 0, 0, 0, COMP, "DFLR", TGSI_OPCODE_DFLR },
    { 1, 1, 0, 0, 0, 0, COMP, "DROUND", TGSI_OPCODE_DROUND },
    { 1, 1, 0, 0, 0, 0, COMP, "DSSG", TGSI_OPCODE_DSSG },
-   { 1, 2, 0, 0, 0, 0, COMP, "DDIV", TGSI_OPCODE_DDIV }
+   { 1, 2, 0, 0, 0, 0, COMP, "DDIV", TGSI_OPCODE_DDIV },
+   { 1, 0, 0, 0, 0, 0, OTHR, "CLOCK", TGSI_OPCODE_CLOCK }
 };
 
 const struct tgsi_opcode_info *
@@ -354,6 +355,7 @@ tgsi_opcode_infer_type( uint opcode )
    case TGSI_OPCODE_LSB:
    case TGSI_OPCODE_UMSB:
    case TGSI_OPCODE_D2U:
+   case TGSI_OPCODE_CLOCK:
       return TGSI_TYPE_UNSIGNED;
    case TGSI_OPCODE_ARL:
    case TGSI_OPCODE_ARR:

src/gallium/include/pipe/p_shader_tokens.h

@@ -569,7 +569,8 @@ struct tgsi_property_data {
 #define TGSI_OPCODE_DROUND              221 /* nvc0 */
 #define TGSI_OPCODE_DSSG                222
 #define TGSI_OPCODE_DDIV                223
-#define TGSI_OPCODE_LAST                224
+#define TGSI_OPCODE_CLOCK               224
+#define TGSI_OPCODE_LAST                225
 
 /**
  * Opcode is the operation code to execute. A given operation defines the

src/virgl_hw.h

@@ -228,6 +228,7 @@ enum virgl_formats {
 #define VIRGL_CAP_FB_NO_ATTACH         (1 << 8)
 #define VIRGL_CAP_ROBUST_BUFFER_ACCESS (1 << 9)
 #define VIRGL_CAP_TGSI_FBFETCH         (1 << 10)
+#define VIRGL_CAP_SHADER_CLOCK         (1 << 11)
 
 /* virgl bind flags - these are compatible with mesa 10.5 gallium.
  * but are fixed, no other should be passed to virgl either.

src/vrend_renderer.c

@@ -122,6 +122,7 @@ enum features_id
    feat_sample_mask,
    feat_sample_shading,
    feat_samplers,
+   feat_shader_clock,
    feat_ssbo,
    feat_ssbo_barrier,
    feat_stencil_texturing,
@@ -185,6 +186,7 @@ static const  struct {
    [feat_sample_mask] = { 32, 31, { "GL_ARB_texture_multisample" } },
    [feat_sample_shading] = { 40, UNAVAIL, { "GL_ARB_sample_shading" } },
    [feat_samplers] = { 33, 30, { "GL_ARB_sampler_objects" } },
+   [feat_shader_clock] = { UNAVAIL, UNAVAIL, { "GL_ARB_shader_clock" } },
    [feat_ssbo] = { 43, 31, { "GL_ARB_shader_storage_buffer_object" } },
    [feat_ssbo_barrier] = { 43, 31, {} },
    [feat_stencil_texturing] = { 43, 31, { "GL_ARB_stencil_texturing" } },
@@ -8161,6 +8163,8 @@ static void vrend_renderer_fill_caps_v2(int gl_ver, int gles_ver,  union virgl_c
    if (has_feature(feat_framebuffer_fetch))
       caps->v2.capability_bits |= VIRGL_CAP_TGSI_FBFETCH;
 
+   if (has_feature(feat_shader_clock))
+      caps->v2.capability_bits |= VIRGL_CAP_SHADER_CLOCK;
 }
 
 void vrend_renderer_fill_caps(uint32_t set, UNUSED uint32_t version,

src/vrend_shader.c

@@ -61,6 +61,7 @@ extern int vrend_dump_shaders;
 #define SHADER_REQ_IMAGE_SIZE         (1 << 17)
 #define SHADER_REQ_TXQS               (1 << 18)
 #define SHADER_REQ_FBFETCH            (1 << 19)
+#define SHADER_REQ_SHADER_CLOCK       (1 << 20)
 
 struct vrend_shader_io {
    unsigned                name;
@@ -237,6 +238,7 @@ static const struct vrend_shader_table shader_req_table[] = {
     { SHADER_REQ_IMAGE_SIZE, "GL_ARB_shader_image_size" },
     { SHADER_REQ_TXQS, "GL_ARB_shader_texture_image_samples" },
     { SHADER_REQ_FBFETCH, "GL_EXT_shader_framebuffer_fetch" },
+    { SHADER_REQ_SHADER_CLOCK, "GL_ARB_shader_clock" },
 };
 
 enum vrend_type_qualifier {
@@ -3894,6 +3896,11 @@ iter_instruction(struct tgsi_iterate_context *iter,
       if (ret)
          return FALSE;
       break;
+   case TGSI_OPCODE_CLOCK:
+      ctx->shader_req_bits |= SHADER_REQ_SHADER_CLOCK;
+      snprintf(buf, 255, "%s = uintBitsToFloat(clock2x32ARB());\n", dsts[0]);
+      EMIT_BUF_WITH_RET(ctx, buf);
+      break;
    default:
       fprintf(stderr,"failed to convert opcode %d\n", inst->Instruction.Opcode);
       break;