}
break;
case TGSI_FILE_OUTPUT:
+ /* Depth write. Mark the position of the output so we can
+ * identify it later. */
+ if (decl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION) {
+ assembler->depth_output = decl->DeclarationRange.First;
+ }
+ break;
case TGSI_FILE_CONSTANT:
break;
case TGSI_FILE_TEMPORARY:
return 0;
}
+static INLINE boolean r300_fs_is_depr(struct r300_fs_asm* assembler,
+ struct tgsi_dst_register* dst)
+{
+ return (assembler->writes_depth &&
+ (dst->File == TGSI_FILE_OUTPUT) &&
+ (dst->Index == assembler->depth_output));
+}
+
static INLINE unsigned r500_fix_swiz(unsigned s)
{
/* For historical reasons, the swizzle values x, y, z, w, and 0 are
int i = fs->instruction_count;
if (dst->DstRegister.File == TGSI_FILE_OUTPUT) {
- fs->instructions[i].inst0 = R500_INST_TYPE_OUT |
- R500_ALU_OMASK(dst->DstRegister.WriteMask);
+ fs->instructions[i].inst0 = R500_INST_TYPE_OUT;
+ if (r300_fs_is_depr(assembler, dst)) {
+ fs->instructions[i].inst4 = R500_W_OMASK;
+ } else {
+ fs->instructions[i].inst0 |=
+ R500_ALU_OMASK(dst->DstRegister.WriteMask);
+ }
} else {
fs->instructions[i].inst0 = R500_INST_TYPE_ALU |
- R500_ALU_WMASK(dst->DstRegister.WriteMask);
+ R500_ALU_WMASK(dst->DstRegister.WriteMask);
}
fs->instructions[i].inst0 |= R500_INST_TEX_SEM_WAIT;
- fs->instructions[i].inst4 =
+ fs->instructions[i].inst4 |=
R500_ALPHA_ADDRD(r300_fs_dst(assembler, &dst->DstRegister));
fs->instructions[i].inst5 =
R500_ALU_RGBA_ADDRD(r300_fs_dst(assembler, &dst->DstRegister));
}
/* Setup starting offset for immediates. */
assembler->imm_offset = consts->user_count;
+ /* Enable depth writes, if needed. */
+ assembler->writes_depth = fs->info.writes_z;
/* Make sure we start at the beginning of the shader. */
if (is_r500) {
#define R500_TEX_WMASK(x) ((x) << 11)
#define R500_ALU_WMASK(x) ((x) << 11)
#define R500_ALU_OMASK(x) ((x) << 15)
+#define R500_W_OMASK (1 << 31)
/* TGSI constants. TGSI is like XML: If it can't solve your problems, you're
* not using enough of it. */
unsigned imm_offset;
/* Number of immediate constants. */
unsigned imm_count;
+ /* Are depth writes enabled? */
+ boolean writes_depth;
+ /* Depth write offset. This is the TGSI output that corresponds to
+ * depth writes. */
+ unsigned depth_output;
};
void r300_translate_fragment_shader(struct r300_context* r300,