shader: re-interpret GRID_SIZE, BLOCK_ID, and THREAD_ID as float in MOV to TEMP

These values are unsigned, but the temporaries are always assumed to be in float
representation, and the temps values will be re-interpreted as integers when
needed. Hence above values must not be value-converted to float but the
bit-representation must be maintained when they are stored in a temp register.

Fixes #105

Signed-off-by: Lepton Wu <lepton@chromium.org>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>

src/vrend_shader.c

@@ -4109,7 +4109,11 @@ get_source_info(struct dump_ctx *ctx,
                } else if (ctx->system_values[j].name == TGSI_SEMANTIC_GRID_SIZE ||
                           ctx->system_values[j].name == TGSI_SEMANTIC_THREAD_ID ||
                           ctx->system_values[j].name == TGSI_SEMANTIC_BLOCK_ID) {
-                  strbuf_fmt(src_buf, "uvec4(%s.%c, %s.%c, %s.%c, %s.%c)",
+                  enum vrend_type_qualifier mov_conv = TYPE_CONVERSION_NONE;
+                  if (inst->Instruction.Opcode == TGSI_OPCODE_MOV &&
+                      inst->Dst[0].Register.File == TGSI_FILE_TEMPORARY)
+                    mov_conv = UINT_BITS_TO_FLOAT;
+                  strbuf_fmt(src_buf, "%s(uvec4(%s.%c, %s.%c, %s.%c, %s.%c))", get_string(mov_conv),
                              ctx->system_values[j].glsl_name, get_swiz_char(src->Register.SwizzleX),
                              ctx->system_values[j].glsl_name, get_swiz_char(src->Register.SwizzleY),
                              ctx->system_values[j].glsl_name, get_swiz_char(src->Register.SwizzleZ),