Merge remote branch 'origin/master' into pipe-video
[mesa.git] / src / gallium / drivers / r600 / r600_asm.c
index de796188fdec8f71f371d2463de3ac7bee2e65de..1393df8875730e162231ae5adec6c6ffd42009de 100644 (file)
@@ -35,6 +35,9 @@
 #define NUM_OF_CYCLES 3
 #define NUM_OF_COMPONENTS 4
 
+#define PREV_ALU(alu) LIST_ENTRY(struct r600_bc_alu, alu->list.prev, list)
+#define NEXT_ALU(alu) LIST_ENTRY(struct r600_bc_alu, alu->list.next, list)
+
 static inline unsigned int r600_bc_get_num_operands(struct r600_bc *bc, struct r600_bc_alu *alu)
 {
        if(alu->is_op3)
@@ -156,6 +159,7 @@ static struct r600_bc_cf *r600_bc_cf(void)
        LIST_INITHEAD(&cf->alu);
        LIST_INITHEAD(&cf->vtx);
        LIST_INITHEAD(&cf->tex);
+       cf->barrier = 1;
        return cf;
 }
 
@@ -244,13 +248,49 @@ static int r600_bc_add_cf(struct r600_bc *bc)
        return 0;
 }
 
+static void r600_bc_remove_cf(struct r600_bc *bc, struct r600_bc_cf *cf)
+{
+       struct r600_bc_cf *other;
+       LIST_FOR_EACH_ENTRY(other, &bc->cf, list) {
+               if (other->id > cf->id)
+                       other->id -= 2;
+               if (other->cf_addr > cf->id)
+                       other->cf_addr -= 2;
+       }
+       LIST_DEL(&cf->list);
+       free(cf);
+}
+
+static void r600_bc_move_cf(struct r600_bc *bc, struct r600_bc_cf *cf, struct r600_bc_cf *next)
+{
+       struct r600_bc_cf *prev = LIST_ENTRY(struct r600_bc_cf, next->list.prev, list);
+       unsigned old_id = cf->id;
+       unsigned new_id = next->list.prev == &bc->cf ? 0 : prev->id + 2;
+       struct r600_bc_cf *other;
+
+       if (prev == cf || next == cf)
+               return; /* position hasn't changed */
+
+       LIST_DEL(&cf->list);
+       LIST_FOR_EACH_ENTRY(other, &bc->cf, list) {
+               if (other->id > old_id)
+                       other->id -= 2;
+               if (other->id >= new_id)
+                       other->id += 2;
+               if (other->cf_addr > old_id)
+                       other->cf_addr -= 2;
+               if (other->cf_addr > new_id)
+                       other->cf_addr += 2;
+       }
+       cf->id = new_id;
+       LIST_ADD(&cf->list, &prev->list);
+}
+
 int r600_bc_add_output(struct r600_bc *bc, const struct r600_bc_output *output)
 {
        int r;
 
-       if (bc->cf_last && (bc->cf_last->inst == output->inst ||
-               (bc->cf_last->inst == BC_INST(bc, V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT) &&
-               output->inst == BC_INST(bc, V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE))) &&
+       if (bc->cf_last && bc->cf_last->inst == BC_INST(bc, V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT) &&
                output->type == bc->cf_last->output.type &&
                output->elem_size == bc->cf_last->output.elem_size &&
                output->swizzle_x == bc->cf_last->output.swizzle_x &&
@@ -262,8 +302,6 @@ int r600_bc_add_output(struct r600_bc *bc, const struct r600_bc_output *output)
                if ((output->gpr + output->burst_count) == bc->cf_last->output.gpr &&
                        (output->array_base + output->burst_count) == bc->cf_last->output.array_base) {
 
-                       bc->cf_last->output.end_of_program |= output->end_of_program;
-                       bc->cf_last->output.inst = output->inst;
                        bc->cf_last->output.gpr = output->gpr;
                        bc->cf_last->output.array_base = output->array_base;
                        bc->cf_last->output.burst_count += output->burst_count;
@@ -272,8 +310,6 @@ int r600_bc_add_output(struct r600_bc *bc, const struct r600_bc_output *output)
                } else if (output->gpr == (bc->cf_last->output.gpr + bc->cf_last->output.burst_count) &&
                        output->array_base == (bc->cf_last->output.array_base + bc->cf_last->output.burst_count)) {
 
-                       bc->cf_last->output.end_of_program |= output->end_of_program;
-                       bc->cf_last->output.inst = output->inst;
                        bc->cf_last->output.burst_count += output->burst_count;
                        return 0;
                }
@@ -282,28 +318,19 @@ int r600_bc_add_output(struct r600_bc *bc, const struct r600_bc_output *output)
        r = r600_bc_add_cf(bc);
        if (r)
                return r;
-       bc->cf_last->inst = output->inst;
+       bc->cf_last->inst = BC_INST(bc, V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT);
        memcpy(&bc->cf_last->output, output, sizeof(struct r600_bc_output));
+       bc->cf_last->output.burst_count = 1;
        return 0;
 }
 
-/* alu instructions that can ony exits once per group */
-static int is_alu_once_inst(struct r600_bc *bc, struct r600_bc_alu *alu)
+/* alu predicate instructions */
+static int is_alu_pred_inst(struct r600_bc *bc, struct r600_bc_alu *alu)
 {
        switch (bc->chiprev) {
        case CHIPREV_R600:
        case CHIPREV_R700:
                return !alu->is_op3 && (
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_UINT ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_UINT ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE_INT ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_INT ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_INT ||
-                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE_INT ||
                        alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_PRED_SETGT_UINT ||
                        alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_PRED_SETGE_UINT ||
                        alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_PRED_SETE ||
@@ -331,16 +358,6 @@ static int is_alu_once_inst(struct r600_bc *bc, struct r600_bc_alu *alu)
        case CHIPREV_EVERGREEN:
        default:
                return !alu->is_op3 && (
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_UINT ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_UINT ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE_INT ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_INT ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_INT ||
-                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE_INT ||
                        alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_PRED_SETGT_UINT ||
                        alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_PRED_SETGE_UINT ||
                        alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_PRED_SETE ||
@@ -368,6 +385,46 @@ static int is_alu_once_inst(struct r600_bc *bc, struct r600_bc_alu *alu)
        }
 }
 
+/* alu kill instructions */
+static int is_alu_kill_inst(struct r600_bc *bc, struct r600_bc_alu *alu)
+{
+       switch (bc->chiprev) {
+       case CHIPREV_R600:
+       case CHIPREV_R700:
+               return !alu->is_op3 && (
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_UINT ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_UINT ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE_INT ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_INT ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_INT ||
+                       alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE_INT);
+       case CHIPREV_EVERGREEN:
+       default:
+               return !alu->is_op3 && (
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_UINT ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_UINT ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLE_INT ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGT_INT ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLGE_INT ||
+                       alu->inst == EG_V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_KILLNE_INT);
+       }
+}
+
+/* alu instructions that can ony exits once per group */
+static int is_alu_once_inst(struct r600_bc *bc, struct r600_bc_alu *alu)
+{
+       return is_alu_kill_inst(bc, alu) ||
+               is_alu_pred_inst(bc, alu);
+}
+
 static int is_alu_reduction_inst(struct r600_bc *bc, struct r600_bc_alu *alu)
 {
        switch (bc->chiprev) {
@@ -1243,6 +1300,16 @@ int r600_bc_add_alu(struct r600_bc *bc, const struct r600_bc_alu *alu)
        return r600_bc_add_alu_type(bc, alu, BC_INST(bc, V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU));
 }
 
+static void r600_bc_remove_alu(struct r600_bc_cf *cf, struct r600_bc_alu *alu)
+{
+       if (alu->last && alu->list.prev != &cf->alu) {
+               PREV_ALU(alu)->last = 1;
+       }
+       LIST_DEL(&alu->list);
+       free(alu);
+       cf->ndw -= 2;
+}
+
 int r600_bc_add_vtx(struct r600_bc *bc, const struct r600_bc_vtx *vtx)
 {
        struct r600_bc_vtx *nvtx = r600_bc_vtx();
@@ -1451,16 +1518,63 @@ static int r600_bc_alu_build(struct r600_bc *bc, struct r600_bc_alu *alu, unsign
        return 0;
 }
 
-/* common for r600/r700 - eg in eg_asm.c */
-static int r600_bc_cf_build(struct r600_bc *bc, struct r600_bc_cf *cf)
+enum cf_class
+{
+       CF_CLASS_ALU,
+       CF_CLASS_TEXTURE,
+       CF_CLASS_VERTEX,
+       CF_CLASS_EXPORT,
+       CF_CLASS_OTHER
+};
+static enum cf_class r600_bc_cf_class(struct r600_bc_cf *cf)
 {
-       unsigned id = cf->id;
-
        switch (cf->inst) {
        case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU << 3):
-       case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE << 3):
        case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER << 3):
        case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER << 3):
+       case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE << 3):
+               return CF_CLASS_ALU;
+
+       case V_SQ_CF_WORD1_SQ_CF_INST_TEX:
+               return CF_CLASS_TEXTURE;
+
+       case V_SQ_CF_WORD1_SQ_CF_INST_VTX:
+       case V_SQ_CF_WORD1_SQ_CF_INST_VTX_TC:
+               return CF_CLASS_VERTEX;
+
+       case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
+       case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
+       case EG_V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
+       case EG_V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
+               return CF_CLASS_EXPORT;
+
+       case V_SQ_CF_WORD1_SQ_CF_INST_JUMP:
+       case V_SQ_CF_WORD1_SQ_CF_INST_ELSE:
+       case V_SQ_CF_WORD1_SQ_CF_INST_POP:
+       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_START_NO_AL:
+       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_END:
+       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_CONTINUE:
+       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_BREAK:
+       case V_SQ_CF_WORD1_SQ_CF_INST_CALL_FS:
+       case V_SQ_CF_WORD1_SQ_CF_INST_RETURN:
+               return CF_CLASS_OTHER;
+
+       default:
+               R600_ERR("unsupported CF instruction (0x%X)\n", cf->inst);
+               return -EINVAL;
+       }
+}
+
+/* common for r600/r700 - eg in eg_asm.c */
+static int r600_bc_cf_build(struct r600_bc *bc, struct r600_bc_cf *cf)
+{
+       unsigned id = cf->id;
+       unsigned end_of_program = bc->cf.prev == &cf->list;
+
+       switch (r600_bc_cf_class(cf)) {
+       case CF_CLASS_ALU:
+               assert(!end_of_program);
                bc->bytecode[id++] = S_SQ_CF_ALU_WORD0_ADDR(cf->addr >> 1) |
                        S_SQ_CF_ALU_WORD0_KCACHE_MODE0(cf->kcache[0].mode) |
                        S_SQ_CF_ALU_WORD0_KCACHE_BANK0(cf->kcache[0].bank) |
@@ -1470,20 +1584,19 @@ static int r600_bc_cf_build(struct r600_bc *bc, struct r600_bc_cf *cf)
                        S_SQ_CF_ALU_WORD1_KCACHE_MODE1(cf->kcache[1].mode) |
                        S_SQ_CF_ALU_WORD1_KCACHE_ADDR0(cf->kcache[0].addr) |
                        S_SQ_CF_ALU_WORD1_KCACHE_ADDR1(cf->kcache[1].addr) |
-                                       S_SQ_CF_ALU_WORD1_BARRIER(1) |
-                                       S_SQ_CF_ALU_WORD1_USES_WATERFALL(bc->chiprev == CHIPREV_R600 ? cf->r6xx_uses_waterfall : 0) |
-                                       S_SQ_CF_ALU_WORD1_COUNT((cf->ndw / 2) - 1);
+                       S_SQ_CF_ALU_WORD1_BARRIER(cf->barrier) |
+                       S_SQ_CF_ALU_WORD1_USES_WATERFALL(bc->chiprev == CHIPREV_R600 ? cf->r6xx_uses_waterfall : 0) |
+                       S_SQ_CF_ALU_WORD1_COUNT((cf->ndw / 2) - 1);
                break;
-       case V_SQ_CF_WORD1_SQ_CF_INST_TEX:
-       case V_SQ_CF_WORD1_SQ_CF_INST_VTX:
-       case V_SQ_CF_WORD1_SQ_CF_INST_VTX_TC:
+       case CF_CLASS_TEXTURE:
+       case CF_CLASS_VERTEX:
                bc->bytecode[id++] = S_SQ_CF_WORD0_ADDR(cf->addr >> 1);
                bc->bytecode[id++] = S_SQ_CF_WORD1_CF_INST(cf->inst) |
-                                       S_SQ_CF_WORD1_BARRIER(1) |
-                                       S_SQ_CF_WORD1_COUNT((cf->ndw / 4) - 1);
+                       S_SQ_CF_WORD1_BARRIER(cf->barrier) |
+                       S_SQ_CF_WORD1_COUNT((cf->ndw / 4) - 1) |
+                       S_SQ_CF_WORD1_END_OF_PROGRAM(end_of_program);
                break;
-       case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
-       case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
+       case CF_CLASS_EXPORT:
                bc->bytecode[id++] = S_SQ_CF_ALLOC_EXPORT_WORD0_RW_GPR(cf->output.gpr) |
                        S_SQ_CF_ALLOC_EXPORT_WORD0_ELEM_SIZE(cf->output.elem_size) |
                        S_SQ_CF_ALLOC_EXPORT_WORD0_ARRAY_BASE(cf->output.array_base) |
@@ -1493,24 +1606,17 @@ static int r600_bc_cf_build(struct r600_bc *bc, struct r600_bc_cf *cf)
                        S_SQ_CF_ALLOC_EXPORT_WORD1_SWIZ_SEL_Y(cf->output.swizzle_y) |
                        S_SQ_CF_ALLOC_EXPORT_WORD1_SWIZ_SEL_Z(cf->output.swizzle_z) |
                        S_SQ_CF_ALLOC_EXPORT_WORD1_SWIZ_SEL_W(cf->output.swizzle_w) |
-                       S_SQ_CF_ALLOC_EXPORT_WORD1_BARRIER(cf->output.barrier) |
-                       S_SQ_CF_ALLOC_EXPORT_WORD1_CF_INST(cf->output.inst) |
-                       S_SQ_CF_ALLOC_EXPORT_WORD1_END_OF_PROGRAM(cf->output.end_of_program);
+                       S_SQ_CF_ALLOC_EXPORT_WORD1_BARRIER(cf->barrier) |
+                       S_SQ_CF_ALLOC_EXPORT_WORD1_CF_INST(cf->inst) |
+                       S_SQ_CF_ALLOC_EXPORT_WORD1_END_OF_PROGRAM(end_of_program);
                break;
-       case V_SQ_CF_WORD1_SQ_CF_INST_JUMP:
-       case V_SQ_CF_WORD1_SQ_CF_INST_ELSE:
-       case V_SQ_CF_WORD1_SQ_CF_INST_POP:
-       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_START_NO_AL:
-       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_END:
-       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_CONTINUE:
-       case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_BREAK:
-       case V_SQ_CF_WORD1_SQ_CF_INST_CALL_FS:
-       case V_SQ_CF_WORD1_SQ_CF_INST_RETURN:
+       case CF_CLASS_OTHER:
                bc->bytecode[id++] = S_SQ_CF_WORD0_ADDR(cf->cf_addr >> 1);
                bc->bytecode[id++] = S_SQ_CF_WORD1_CF_INST(cf->inst) |
-                                       S_SQ_CF_WORD1_BARRIER(1) |
-                                       S_SQ_CF_WORD1_COND(cf->cond) |
-                                       S_SQ_CF_WORD1_POP_COUNT(cf->pop_count);
+                       S_SQ_CF_WORD1_BARRIER(cf->barrier) |
+                       S_SQ_CF_WORD1_COND(cf->cond) |
+                       S_SQ_CF_WORD1_POP_COUNT(cf->pop_count) |
+                       S_SQ_CF_WORD1_END_OF_PROGRAM(end_of_program);
 
                break;
        default:
@@ -1520,12 +1626,819 @@ static int r600_bc_cf_build(struct r600_bc *bc, struct r600_bc_cf *cf)
        return 0;
 }
 
+struct gpr_usage_range {
+       int     replacement;
+       int     rel_block;
+       int     start;
+       int     end;
+};
+
+struct gpr_usage {
+       unsigned                channels:4;
+       int                     first_write;
+       int                     last_write[4];
+       unsigned                nranges;
+       struct gpr_usage_range  *ranges;
+};
+
+static struct gpr_usage_range* last_gpr_usage_range(struct gpr_usage *usage)
+{
+       if (usage->nranges)
+               return usage->ranges + usage->nranges - 1;
+       else
+               return NULL;
+}
+
+static struct gpr_usage_range* add_gpr_usage_range(struct gpr_usage *usage)
+{
+       struct gpr_usage_range *range;
+
+       usage->nranges++;
+       usage->ranges = realloc(usage->ranges, usage->nranges * sizeof(struct gpr_usage_range));
+       if (!usage->ranges)
+               return NULL;
+
+       range = last_gpr_usage_range(usage);
+       range->replacement = -1; /* no prefered replacement */
+       range->rel_block = -1;
+       range->start = -1;
+       range->end = -1;
+
+       return range;
+}
+
+static void notice_gpr_read(struct gpr_usage *usage, int id, unsigned chan)
+{
+       struct gpr_usage_range* range;
+
+        usage->channels |= 1 << chan;
+        usage->first_write = -1;
+        if (!usage->nranges) {
+               range = add_gpr_usage_range(usage);
+        } else
+               range = last_gpr_usage_range(usage);
+
+        if (range && range->end < id)
+               range->end = id;
+}
+
+static void notice_gpr_rel_read(struct r600_bc *bc, struct gpr_usage usage[128],
+                               int id, unsigned gpr, unsigned chan)
+{
+       unsigned i;
+       for (i = gpr; i < bc->ngpr; ++i)
+               notice_gpr_read(&usage[i], id, chan);
+
+       last_gpr_usage_range(&usage[gpr])->rel_block = bc->ngpr - gpr;
+}
+
+static void notice_gpr_last_write(struct gpr_usage *usage, int id, unsigned chan)
+{
+        usage->last_write[chan] = id;
+}
+
+static void notice_gpr_write(struct gpr_usage *usage, int id, unsigned chan,
+                               int predicate, int prefered_replacement)
+{
+       struct gpr_usage_range* last_range = last_gpr_usage_range(usage);
+       int start = usage->first_write != -1 ? usage->first_write : id;
+       usage->channels &= ~(1 << chan);
+       if (usage->channels) {
+               if (usage->first_write == -1)
+                       usage->first_write = id;
+       } else if (!last_range || (last_range->start != start && !predicate)) {
+               usage->first_write = start;
+               struct gpr_usage_range* range = add_gpr_usage_range(usage);
+               range->replacement = prefered_replacement;
+                range->start = start;
+        } else if (last_range->start == start && prefered_replacement != -1) {
+               last_range->replacement = prefered_replacement;
+        }
+        notice_gpr_last_write(usage, id, chan);
+}
+
+static void notice_gpr_rel_last_write(struct gpr_usage usage[128], int id, unsigned chan)
+{
+       unsigned i;
+       for (i = 0; i < 128; ++i)
+               notice_gpr_last_write(&usage[i], id, chan);
+}
+
+static void notice_gpr_rel_write(struct gpr_usage usage[128], int id, unsigned chan)
+{
+       unsigned i;
+       for (i = 0; i < 128; ++i)
+               notice_gpr_write(&usage[i], id, chan, 1, -1);
+}
+
+static void notice_alu_src_gprs(struct r600_bc *bc, struct r600_bc_alu *alu,
+                                struct gpr_usage usage[128], int id)
+{
+       unsigned src, num_src;
+
+       num_src = r600_bc_get_num_operands(bc, alu);
+       for (src = 0; src < num_src; ++src) {
+               // constants doesn't matter
+               if (!is_gpr(alu->src[src].sel))
+                       continue;
+
+               if (alu->src[src].rel)
+                       notice_gpr_rel_read(bc, usage, id, alu->src[src].sel, alu->src[src].chan);
+               else
+                       notice_gpr_read(&usage[alu->src[src].sel], id, alu->src[src].chan);
+       }
+}
+
+static void notice_alu_dst_gprs(struct r600_bc_alu *alu_first, struct gpr_usage usage[128],
+                               int id, int predicate)
+{
+       struct r600_bc_alu *alu;
+       for (alu = alu_first; alu; alu = LIST_ENTRY(struct r600_bc_alu, alu->list.next, list)) {
+               if (alu->dst.write) {
+                       if (alu->dst.rel)
+                               notice_gpr_rel_write(usage, id, alu->dst.chan);
+                       else if (alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV && is_gpr(alu->src[0].sel))
+                               notice_gpr_write(&usage[alu->dst.sel], id, alu->dst.chan,
+                                               predicate, alu->src[0].sel);
+                       else
+                               notice_gpr_write(&usage[alu->dst.sel], id, alu->dst.chan, predicate, -1);
+               }
+
+               if (alu->last)
+                       break;
+       }
+}
+
+static void notice_tex_gprs(struct r600_bc *bc, struct r600_bc_tex *tex,
+                               struct gpr_usage usage[128],
+                               int id, int predicate)
+{
+       if (tex->src_rel) {
+                if (tex->src_sel_x < 4)
+                       notice_gpr_rel_read(bc, usage, id, tex->src_gpr, tex->src_sel_x);
+               if (tex->src_sel_y < 4)
+                       notice_gpr_rel_read(bc, usage, id, tex->src_gpr, tex->src_sel_y);
+               if (tex->src_sel_z < 4)
+                       notice_gpr_rel_read(bc, usage, id, tex->src_gpr, tex->src_sel_z);
+               if (tex->src_sel_w < 4)
+                       notice_gpr_rel_read(bc, usage, id, tex->src_gpr, tex->src_sel_w);
+        } else {
+               if (tex->src_sel_x < 4)
+                       notice_gpr_read(&usage[tex->src_gpr], id, tex->src_sel_x);
+               if (tex->src_sel_y < 4)
+                       notice_gpr_read(&usage[tex->src_gpr], id, tex->src_sel_y);
+               if (tex->src_sel_z < 4)
+                       notice_gpr_read(&usage[tex->src_gpr], id, tex->src_sel_z);
+               if (tex->src_sel_w < 4)
+                       notice_gpr_read(&usage[tex->src_gpr], id, tex->src_sel_w);
+       }
+       if (tex->dst_rel) {
+               if (tex->dst_sel_x != 7)
+                       notice_gpr_rel_write(usage, id, 0);
+               if (tex->dst_sel_y != 7)
+                       notice_gpr_rel_write(usage, id, 1);
+               if (tex->dst_sel_z != 7)
+                       notice_gpr_rel_write(usage, id, 2);
+               if (tex->dst_sel_w != 7)
+                       notice_gpr_rel_write(usage, id, 3);
+       } else {
+               if (tex->dst_sel_x != 7)
+                       notice_gpr_write(&usage[tex->dst_gpr], id, 0, predicate, -1);
+               if (tex->dst_sel_y != 7)
+                       notice_gpr_write(&usage[tex->dst_gpr], id, 1, predicate, -1);
+               if (tex->dst_sel_z != 7)
+                       notice_gpr_write(&usage[tex->dst_gpr], id, 2, predicate, -1);
+               if (tex->dst_sel_w != 7)
+                       notice_gpr_write(&usage[tex->dst_gpr], id, 3, predicate, -1);
+       }
+}
+
+static void notice_vtx_gprs(struct r600_bc_vtx *vtx, struct gpr_usage usage[128],
+                               int id, int predicate)
+{
+       notice_gpr_read(&usage[vtx->src_gpr], id, vtx->src_sel_x);
+
+       if (vtx->dst_sel_x != 7)
+               notice_gpr_write(&usage[vtx->dst_gpr], id, 0, predicate, -1);
+       if (vtx->dst_sel_y != 7)
+               notice_gpr_write(&usage[vtx->dst_gpr], id, 1, predicate, -1);
+       if (vtx->dst_sel_z != 7)
+               notice_gpr_write(&usage[vtx->dst_gpr], id, 2, predicate, -1);
+       if (vtx->dst_sel_w != 7)
+               notice_gpr_write(&usage[vtx->dst_gpr], id, 3, predicate, -1);
+}
+
+static void notice_export_gprs(struct r600_bc_cf *cf, struct gpr_usage usage[128],
+                               struct r600_bc_cf *export_cf[128], int export_remap[128])
+{
+       //TODO handle other memory operations
+       struct gpr_usage *output = &usage[cf->output.gpr];
+       int id = MAX4(output->last_write[0], output->last_write[1],
+               output->last_write[2], output->last_write[3]);
+       id += 0x100;
+       id &= ~0xFF;
+
+       export_cf[cf->output.gpr] = cf;
+       export_remap[cf->output.gpr] = id;
+       if (cf->output.swizzle_x < 4)
+               notice_gpr_read(output, id, cf->output.swizzle_x);
+       if (cf->output.swizzle_y < 4)
+               notice_gpr_read(output, id, cf->output.swizzle_y);
+       if (cf->output.swizzle_z < 4)
+               notice_gpr_read(output, id, cf->output.swizzle_z);
+       if (cf->output.swizzle_w < 4)
+               notice_gpr_read(output, id, cf->output.swizzle_w);
+}
+
+static struct gpr_usage_range *find_src_range(struct gpr_usage *usage, int id)
+{
+       unsigned i;
+       for (i = 0; i < usage->nranges; ++i) {
+               struct gpr_usage_range* range = &usage->ranges[i];
+
+               if (range->start < id && id <= range->end)
+                       return range;
+       }
+       return NULL;
+}
+
+static struct gpr_usage_range *find_dst_range(struct gpr_usage *usage, int id)
+{
+       unsigned i;
+       for (i = 0; i < usage->nranges; ++i) {
+               struct gpr_usage_range* range = &usage->ranges[i];
+               int end = range->end;
+
+               if (range->start <= id && (id < end || end == -1))
+                       return range;
+       }
+       return NULL;
+}
+
+static int is_barrier_needed(struct gpr_usage *usage, int id, unsigned chan, int last_barrier)
+{
+       if (usage->last_write[chan] != (id & ~0xFF))
+               return usage->last_write[chan] >= last_barrier;
+       else
+               return 0;
+}
+
+static int is_intersection(struct gpr_usage_range* a, struct gpr_usage_range* b)
+{
+       return a->start <= b->end && b->start < a->end;
+}
+
+static int rate_replacement(struct gpr_usage usage[128], unsigned current, unsigned gpr,
+                               struct gpr_usage_range* range)
+{
+       int max_gpr = gpr + MAX2(range->rel_block, 1);
+       int best_start = 0x3FFFFFFF, best_end = 0x3FFFFFFF;
+       unsigned i;
+
+       for (; gpr < max_gpr; ++gpr) {
+
+               if (gpr >= 128) /* relative gpr block won't fit into clause temporaries */
+                       return -1; /* forget it */
+
+               if (gpr == current) /* ignore ranges of to be replaced register */
+                       continue;
+
+               for (i = 0; i < usage[gpr].nranges; ++i) {
+                       if (usage[gpr].ranges[i].replacement < gpr)
+                               continue; /* ignore already remapped ranges */
+
+                       if (is_intersection(&usage[gpr].ranges[i], range))
+                               return -1; /* forget it if usages overlap */
+
+                       if (range->start >= usage[gpr].ranges[i].end)
+                               best_start = MIN2(best_start, range->start - usage[gpr].ranges[i].end);
+
+                       if (range->end != -1 && range->end <= usage[gpr].ranges[i].start)
+                               best_end = MIN2(best_end, usage[gpr].ranges[i].start - range->end);
+               }
+       }
+       return best_start + best_end;
+}
+
+static void find_replacement(struct gpr_usage usage[128], unsigned current,
+                               struct gpr_usage_range *range)
+{
+       unsigned i, j;
+       int best_gpr = -1, best_rate = 0x7FFFFFFF;
+
+       if (range->replacement == current) 
+               return; /* register prefers to be not remapped */
+
+       if (range->replacement != -1 && range->replacement <= current) {
+               struct gpr_usage_range *other = find_src_range(&usage[range->replacement], range->start);
+               if (other && other->replacement != -1)
+                       range->replacement = other->replacement;
+       }
+
+       if (range->replacement != -1 && range->replacement < current) {
+               int rate = rate_replacement(usage, current, range->replacement, range);
+
+               /* check if prefered replacement can be used */
+               if (rate != -1) {
+                       best_rate = rate;
+                       best_gpr = range->replacement;
+               }
+       }
+
+       if (best_gpr == -1 && (range->start & ~0xFF) == (range->end & ~0xFF)) {
+               /* register is just used inside one ALU clause */
+               /* try to use clause temporaries for it */
+               for (i = 127; i > 123; --i) {
+                       int rate = rate_replacement(usage, current, i, range);
+
+                       if (rate == -1) /* can't be used because ranges overlap */
+                               continue;
+
+                       if (rate < best_rate) {
+                               best_rate = rate;
+                               best_gpr = i;
+
+                               /* can't get better than this */
+                               if (rate == 0)
+                                       break;
+                       }
+               }
+       }
+
+       if (best_gpr == -1) {
+               for (i = 0; i < current; ++i) {
+                       int rate = rate_replacement(usage, current, i, range);
+
+                       if (rate == -1) /* can't be used because ranges overlap */
+                               continue;
+
+                       if (rate < best_rate) {
+                               best_rate = rate;
+                               best_gpr = i;
+
+                               /* can't get better than this */
+                               if (rate == 0)
+                                       break;
+                       }
+               }
+       }
+
+       if (best_gpr != -1) {
+               struct gpr_usage_range *reservation = add_gpr_usage_range(&usage[best_gpr]);
+               reservation->replacement = best_gpr;
+               reservation->rel_block = -1;
+               reservation->start = range->start;
+               reservation->end = range->end;
+       } else
+               best_gpr = current;
+
+       range->replacement = best_gpr;
+       if (range->rel_block == -1)
+               return; /* no relative block to handle we are done here */
+
+       /* set prefered register for the whole relative register block */
+       for (i = current + 1, ++best_gpr; i < current + range->rel_block; ++i, ++best_gpr) {
+               for (j = 0; j < usage[i].nranges; ++j) {
+                       if (is_intersection(&usage[i].ranges[j], range))
+                               usage[i].ranges[j].replacement = best_gpr;
+               }
+       }
+}
+
+static void replace_alu_gprs(struct r600_bc *bc, struct r600_bc_alu *alu, struct gpr_usage usage[128],
+                               int id, int last_barrier, unsigned *barrier)
+{
+       struct gpr_usage *cur_usage;
+       struct gpr_usage_range *range;
+       unsigned src, num_src;
+
+       num_src = r600_bc_get_num_operands(bc, alu);
+       for (src = 0; src < num_src; ++src) {
+               // constants doesn't matter
+               if (!is_gpr(alu->src[src].sel))
+                       continue;
+
+               cur_usage = &usage[alu->src[src].sel];
+               range = find_src_range(cur_usage, id);
+               alu->src[src].sel = range->replacement;
+
+               *barrier |= is_barrier_needed(cur_usage, id, alu->src[src].chan, last_barrier);
+       }
+
+       if (alu->dst.write) {
+               cur_usage = &usage[alu->dst.sel];
+               range = find_dst_range(cur_usage, id);
+               if (!range || range->replacement == -1) {
+                       if (!alu->is_op3)
+                               alu->dst.write = 0;
+                       else
+                               /*TODO: really check that register 123 is useable */
+                               alu->dst.sel = 123;
+               } else {
+                       alu->dst.sel = range->replacement;
+                       *barrier |= is_barrier_needed(cur_usage, id, alu->dst.chan, last_barrier);
+               }
+       }
+       if (alu->dst.write) {
+               if (alu->dst.rel)
+                       notice_gpr_rel_last_write(usage, id, alu->dst.chan);
+               else
+                       notice_gpr_last_write(cur_usage, id, alu->dst.chan);
+       }
+}
+
+static void replace_tex_gprs(struct r600_bc_tex *tex, struct gpr_usage usage[128],
+                               int id, int last_barrier, unsigned *barrier)
+{
+       struct gpr_usage *cur_usage = &usage[tex->src_gpr];
+       struct gpr_usage_range *range = find_src_range(cur_usage, id);
+
+       if (tex->src_rel) {
+               *barrier = 1;
+        } else {
+               if (tex->src_sel_x < 4)
+                       *barrier |= is_barrier_needed(cur_usage, id, tex->src_sel_x, last_barrier);
+               if (tex->src_sel_y < 4)
+                       *barrier |= is_barrier_needed(cur_usage, id, tex->src_sel_y, last_barrier);
+               if (tex->src_sel_z < 4)
+                       *barrier |= is_barrier_needed(cur_usage, id, tex->src_sel_z, last_barrier);
+               if (tex->src_sel_w < 4)
+                       *barrier |= is_barrier_needed(cur_usage, id, tex->src_sel_w, last_barrier);
+       }
+       tex->src_gpr = range->replacement;
+
+       cur_usage = &usage[tex->dst_gpr];
+
+       range = find_dst_range(cur_usage, id);
+       if (range) {
+               tex->dst_gpr = range->replacement;
+
+               if (tex->dst_rel) {
+                       if (tex->dst_sel_x != 7)
+                               notice_gpr_rel_last_write(usage, id, tex->dst_sel_x);
+                       if (tex->dst_sel_y != 7)
+                               notice_gpr_rel_last_write(usage, id, tex->dst_sel_y);
+                       if (tex->dst_sel_z != 7)
+                               notice_gpr_rel_last_write(usage, id, tex->dst_sel_z);
+                       if (tex->dst_sel_w != 7)
+                               notice_gpr_rel_last_write(usage, id, tex->dst_sel_w);
+               } else {
+                       if (tex->dst_sel_x != 7)
+                               notice_gpr_last_write(cur_usage, id, tex->dst_sel_x);
+                       if (tex->dst_sel_y != 7)
+                               notice_gpr_last_write(cur_usage, id, tex->dst_sel_y);
+                       if (tex->dst_sel_z != 7)
+                               notice_gpr_last_write(cur_usage, id, tex->dst_sel_z);
+                       if (tex->dst_sel_w != 7)
+                               notice_gpr_last_write(cur_usage, id, tex->dst_sel_w);
+               }
+       } else {
+               tex->dst_gpr = 123;
+       }
+}
+
+static void replace_vtx_gprs(struct r600_bc_vtx *vtx, struct gpr_usage usage[128],
+                               int id, int last_barrier, unsigned *barrier)
+{
+       struct gpr_usage *cur_usage = &usage[vtx->src_gpr];
+       struct gpr_usage_range *range = find_src_range(cur_usage, id);
+
+       *barrier |= is_barrier_needed(cur_usage, id, vtx->src_sel_x, last_barrier);
+
+       vtx->src_gpr = range->replacement;
+
+       cur_usage = &usage[vtx->dst_gpr];
+       range = find_dst_range(cur_usage, id);
+       if (range) {
+               vtx->dst_gpr = range->replacement;
+
+               if (vtx->dst_sel_x != 7)
+                       notice_gpr_last_write(cur_usage, id, vtx->dst_sel_x);
+               if (vtx->dst_sel_y != 7)
+                       notice_gpr_last_write(cur_usage, id, vtx->dst_sel_y);
+               if (vtx->dst_sel_z != 7)
+                       notice_gpr_last_write(cur_usage, id, vtx->dst_sel_z);
+               if (vtx->dst_sel_w != 7)
+                       notice_gpr_last_write(cur_usage, id, vtx->dst_sel_w);
+       } else {
+               vtx->dst_gpr = 123;
+       }
+}
+
+static void replace_export_gprs(struct r600_bc_cf *cf, struct gpr_usage usage[128],
+                               int id, int last_barrier)
+{
+       //TODO handle other memory operations
+       struct gpr_usage *cur_usage = &usage[cf->output.gpr];
+       struct gpr_usage_range *range = find_src_range(cur_usage, id);
+
+       cf->barrier = 0;
+       if (cf->output.swizzle_x < 4)
+               cf->barrier |= is_barrier_needed(cur_usage, -1, cf->output.swizzle_x, last_barrier);
+       if (cf->output.swizzle_y < 4)
+               cf->barrier |= is_barrier_needed(cur_usage, -1, cf->output.swizzle_y, last_barrier);
+       if (cf->output.swizzle_z < 4)
+               cf->barrier |= is_barrier_needed(cur_usage, -1, cf->output.swizzle_z, last_barrier);
+       if (cf->output.swizzle_w < 4)
+               cf->barrier |= is_barrier_needed(cur_usage, -1, cf->output.swizzle_w, last_barrier);
+
+       cf->output.gpr = range->replacement;
+}
+
+static void optimize_alu_inst(struct r600_bc *bc, struct r600_bc_cf *cf, struct r600_bc_alu *alu)
+{
+       struct r600_bc_alu *alu_next;
+       unsigned chan;
+       unsigned src, num_src;
+
+       /* check if a MOV could be optimized away */
+       if (alu->inst == V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV) {
+
+               /* destination equals source? */
+               if (alu->dst.sel != alu->src[0].sel ||
+                       alu->dst.chan != alu->src[0].chan)
+                       return;
+
+               /* any special handling for the source? */
+               if (alu->src[0].rel || alu->src[0].neg || alu->src[0].abs)
+                       return;
+
+               /* any special handling for destination? */
+               if (alu->dst.rel || alu->dst.clamp)
+                       return;
+
+               /* ok find next instruction group and check if ps/pv is used */
+               for (alu_next = alu; !alu_next->last; alu_next = NEXT_ALU(alu_next));
+
+               if (alu_next->list.next != &cf->alu) {
+                       chan = is_alu_reduction_inst(bc, alu) ? 0 : alu->dst.chan;
+                       for (alu_next = NEXT_ALU(alu_next); alu_next; alu_next = NEXT_ALU(alu_next)) {
+                               num_src = r600_bc_get_num_operands(bc, alu_next);
+                               for (src = 0; src < num_src; ++src) {
+                                       if (alu_next->src[src].sel == V_SQ_ALU_SRC_PV &&
+                                               alu_next->src[src].chan == chan)
+                                               return;
+
+                                       if (alu_next->src[src].sel == V_SQ_ALU_SRC_PS)
+                                               return;
+                               }
+
+                               if (alu_next->last)
+                                       break;
+                       }
+               }
+
+               r600_bc_remove_alu(cf, alu);
+       }
+}
+
+static void optimize_export_inst(struct r600_bc *bc, struct r600_bc_cf *cf)
+{
+       struct r600_bc_cf *prev = LIST_ENTRY(struct r600_bc_cf, cf->list.prev, list);
+       if (&prev->list == &bc->cf ||
+               prev->inst != cf->inst ||
+               prev->output.type != cf->output.type ||
+               prev->output.elem_size != cf->output.elem_size ||
+               prev->output.swizzle_x != cf->output.swizzle_x ||
+               prev->output.swizzle_y != cf->output.swizzle_y ||
+               prev->output.swizzle_z != cf->output.swizzle_z ||
+               prev->output.swizzle_w != cf->output.swizzle_w)
+               return;
+
+       if ((prev->output.burst_count + cf->output.burst_count) > 16)
+               return;
+
+       if ((prev->output.gpr + prev->output.burst_count) == cf->output.gpr &&
+               (prev->output.array_base + prev->output.burst_count) == cf->output.array_base) {
+
+               prev->output.burst_count += cf->output.burst_count;
+               r600_bc_remove_cf(bc, cf);
+
+       } else if (prev->output.gpr == (cf->output.gpr + cf->output.burst_count) &&
+               prev->output.array_base == (cf->output.array_base + cf->output.burst_count)) {
+
+               cf->output.burst_count += prev->output.burst_count;
+               r600_bc_remove_cf(bc, prev);
+       }
+}
+
+static void r600_bc_optimize(struct r600_bc *bc)
+{
+       struct r600_bc_cf *cf, *next_cf;
+       struct r600_bc_alu *first, *next_alu;
+       struct r600_bc_alu *alu;
+       struct r600_bc_vtx *vtx;
+       struct r600_bc_tex *tex;
+       struct gpr_usage usage[128];
+
+       /* assume that each gpr is exported only once */
+       struct r600_bc_cf *export_cf[128] = { NULL };
+       int export_remap[128];
+
+       int id, cond_start, barrier[bc->nstack];
+       unsigned i, j, stack, predicate, old_stack;
+
+       memset(&usage, 0, sizeof(usage));
+       for (i = 0; i < 128; ++i) {
+               usage[i].first_write = -1;
+               usage[i].last_write[0] = -1;
+               usage[i].last_write[1] = -1;
+               usage[i].last_write[2] = -1;
+               usage[i].last_write[3] = -1;
+       }
+
+       /* first gather some informations about the gpr usage */
+       id = 0; stack = 0;
+       LIST_FOR_EACH_ENTRY(cf, &bc->cf, list) {
+               old_stack = stack;
+               if (stack == 0)
+                       cond_start = stack;
+
+               switch (r600_bc_cf_class(cf)) {
+               case CF_CLASS_ALU:
+                       predicate = 0;
+                       first = NULL;
+                       LIST_FOR_EACH_ENTRY(alu, &cf->alu, list) {
+                               if (!first)
+                                       first = alu;
+                               notice_alu_src_gprs(bc, alu, usage, id);
+                               if (alu->last) {
+                                       notice_alu_dst_gprs(first, usage, id, predicate || stack > 0);
+                                       first = NULL;
+                                       ++id;
+                               }
+                               if (is_alu_pred_inst(bc, alu))
+                                       predicate++;
+                       }
+                       if (cf->inst == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE << 3)
+                               stack += predicate;
+                       else if (cf->inst == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER << 3)
+                               stack -= 1;
+                       else if (cf->inst == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER << 3)
+                               stack -= 2;
+                       break;
+               case CF_CLASS_TEXTURE:
+                       LIST_FOR_EACH_ENTRY(tex, &cf->tex, list) {
+                               notice_tex_gprs(bc, tex, usage, id++, stack > 0);
+                       }
+                       break;
+               case CF_CLASS_VERTEX:
+                       LIST_FOR_EACH_ENTRY(vtx, &cf->vtx, list) {
+                               notice_vtx_gprs(vtx, usage, id++, stack > 0);
+                       }
+                       break;
+               case CF_CLASS_EXPORT:
+                       notice_export_gprs(cf, usage, export_cf, export_remap);
+                       continue; // don't increment id
+               case CF_CLASS_OTHER:
+                       switch (cf->inst) {
+                       case V_SQ_CF_WORD1_SQ_CF_INST_JUMP:
+                       case V_SQ_CF_WORD1_SQ_CF_INST_ELSE:
+                       case V_SQ_CF_WORD1_SQ_CF_INST_CALL_FS:
+                               break;
+
+                       case V_SQ_CF_WORD1_SQ_CF_INST_POP:
+                               stack -= cf->pop_count;
+                               break;
+
+                       default:
+                               // TODO implement loop handling
+                               goto out;
+                       }
+               }
+
+               /* extend last_write after conditional block */
+               if (stack == 0 && old_stack != 0)
+                       for (i = 0; i < 128; ++i)
+                               for (j = 0; j < 4; ++j)
+                                       if (usage[i].last_write[j] >= cond_start)
+                                               usage[i].last_write[j] = id;
+
+               id += 0x100;
+               id &= ~0xFF;
+       }
+       assert(stack == 0);
+
+       /* try to optimize gpr usage */
+       for (i = 0; i < 124; ++i) {
+               for (j = 0; j < usage[i].nranges; ++j) {
+                       struct gpr_usage_range *range = &usage[i].ranges[j];
+                       if (range->start == -1)
+                               /* can't rearange shader inputs */
+                               range->replacement = i;
+                       else if (range->end == -1)
+                               /* gpr isn't used any more after this instruction */
+                               range->replacement = -1;
+                       else
+                               find_replacement(usage, i, range);
+
+                       if (range->replacement == i)
+                               bc->ngpr = i;
+                       else if (range->replacement < i && range->replacement > bc->ngpr)
+                               bc->ngpr = range->replacement;
+               }
+       }
+       bc->ngpr++;
+
+       /* apply the changes */
+       for (i = 0; i < 128; ++i) {
+               usage[i].last_write[0] = -1;
+               usage[i].last_write[1] = -1;
+               usage[i].last_write[2] = -1;
+               usage[i].last_write[3] = -1;
+       }
+       barrier[0] = 0;
+       id = 0; stack = 0;
+       LIST_FOR_EACH_ENTRY_SAFE(cf, next_cf, &bc->cf, list) {
+               old_stack = stack;
+               switch (r600_bc_cf_class(cf)) {
+               case CF_CLASS_ALU:
+                       predicate = 0;
+                       first = NULL;
+                       cf->barrier = 0;
+                       LIST_FOR_EACH_ENTRY_SAFE(alu, next_alu, &cf->alu, list) {
+                               replace_alu_gprs(bc, alu, usage, id, barrier[stack], &cf->barrier);
+                               if (alu->last)
+                                       ++id;
+
+                               if (is_alu_pred_inst(bc, alu))
+                                       predicate++;
+
+                               if (cf->inst == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU << 3)
+                                       optimize_alu_inst(bc, cf, alu);
+                       }
+                       if (cf->inst == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE << 3)
+                               stack += predicate;
+                       else if (cf->inst == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER << 3)
+                               stack -= 1;
+                       else if (cf->inst == V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER << 3)
+                               stack -= 2;
+                       if (LIST_IS_EMPTY(&cf->alu)) {
+                               r600_bc_remove_cf(bc, cf);
+                               cf = NULL;
+                       }
+                       break;
+               case CF_CLASS_TEXTURE:
+                       cf->barrier = 0;
+                       LIST_FOR_EACH_ENTRY(tex, &cf->tex, list) {
+                               replace_tex_gprs(tex, usage, id++, barrier[stack], &cf->barrier);
+                       }
+                       break;
+               case CF_CLASS_VERTEX:
+                       cf->barrier = 0;
+                       LIST_FOR_EACH_ENTRY(vtx, &cf->vtx, list) {
+                               replace_vtx_gprs(vtx, usage, id++, barrier[stack], &cf->barrier);
+                       }
+                       break;
+               case CF_CLASS_EXPORT:
+                       continue; // don't increment id
+               case CF_CLASS_OTHER:
+                       if (cf->inst == V_SQ_CF_WORD1_SQ_CF_INST_POP) {
+                               cf->barrier = 0;
+                               stack -= cf->pop_count;
+                       }
+                       break;
+               }
+
+               id &= ~0xFF;
+               if (cf && cf->barrier)
+                       barrier[old_stack] = id;
+
+               for (i = old_stack + 1; i <= stack; ++i)
+                       barrier[i] = barrier[old_stack];
+
+               id += 0x100;
+               if (stack != 0) /* ensure exports are placed outside of conditional blocks */
+                       continue;
+
+               for (i = 0; i < 128; ++i) {
+                       if (!export_cf[i] || id < export_remap[i])
+                               continue;
+
+                       r600_bc_move_cf(bc, export_cf[i], next_cf);
+                       replace_export_gprs(export_cf[i], usage, export_remap[i], barrier[stack]);
+                       if (export_cf[i]->barrier)
+                               barrier[stack] = id - 1;
+                       next_cf = LIST_ENTRY(struct r600_bc_cf, export_cf[i]->list.next, list);
+                       optimize_export_inst(bc, export_cf[i]);
+                       export_cf[i] = NULL;
+               }
+       }
+       assert(stack == 0);
+
+out:
+       for (i = 0; i < 128; ++i) {
+               free(usage[i].ranges);
+       }
+}
+
 int r600_bc_build(struct r600_bc *bc)
 {
        struct r600_bc_cf *cf;
        struct r600_bc_alu *alu;
        struct r600_bc_vtx *vtx;
        struct r600_bc_tex *tex;
+       struct r600_bc_cf *exports[4] = { NULL };
        uint32_t literal[4];
        unsigned nliteral;
        unsigned addr;
@@ -1537,37 +2450,26 @@ int r600_bc_build(struct r600_bc *bc)
                bc->nstack = 1;
        }
 
+       //r600_bc_optimize(bc);
+
        /* first path compute addr of each CF block */
        /* addr start after all the CF instructions */
-       addr = bc->cf_last->id + 2;
+       addr = LIST_ENTRY(struct r600_bc_cf, bc->cf.prev, list)->id + 2;
        LIST_FOR_EACH_ENTRY(cf, &bc->cf, list) {
-               switch (cf->inst) {
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE << 3):
+               switch (r600_bc_cf_class(cf)) {
+               case CF_CLASS_ALU:
                        break;
-               case V_SQ_CF_WORD1_SQ_CF_INST_TEX:
-               case V_SQ_CF_WORD1_SQ_CF_INST_VTX:
-               case V_SQ_CF_WORD1_SQ_CF_INST_VTX_TC:
+               case CF_CLASS_TEXTURE:
+               case CF_CLASS_VERTEX:
                        /* fetch node need to be 16 bytes aligned*/
                        addr += 3;
                        addr &= 0xFFFFFFFCUL;
                        break;
-               case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
-               case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
-               case EG_V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
-               case EG_V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
+               case CF_CLASS_EXPORT:
+                       if (cf->inst == BC_INST(bc, V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT))
+                               exports[cf->output.type] = cf;
                        break;
-               case V_SQ_CF_WORD1_SQ_CF_INST_JUMP:
-               case V_SQ_CF_WORD1_SQ_CF_INST_ELSE:
-               case V_SQ_CF_WORD1_SQ_CF_INST_POP:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_START_NO_AL:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_END:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_CONTINUE:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_BREAK:
-               case V_SQ_CF_WORD1_SQ_CF_INST_CALL_FS:
-               case V_SQ_CF_WORD1_SQ_CF_INST_RETURN:
+               case CF_CLASS_OTHER:
                        break;
                default:
                        R600_ERR("unsupported CF instruction (0x%X)\n", cf->inst);
@@ -1577,6 +2479,14 @@ int r600_bc_build(struct r600_bc *bc)
                addr += cf->ndw;
                bc->ndw = cf->addr + cf->ndw;
        }
+
+       /* set export done on last export of each type */
+       for (i = 0; i < 4; ++i) {
+               if (exports[i]) {
+                       exports[i]->inst = BC_INST(bc, V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE);
+               }
+       }
+
        free(bc->bytecode);
        bc->bytecode = calloc(1, bc->ndw * 4);
        if (bc->bytecode == NULL)
@@ -1589,11 +2499,8 @@ int r600_bc_build(struct r600_bc *bc)
                        r = r600_bc_cf_build(bc, cf);
                if (r)
                        return r;
-               switch (cf->inst) {
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE << 3):
+               switch (r600_bc_cf_class(cf)) {
+               case CF_CLASS_ALU:
                        nliteral = 0;
                        memset(literal, 0, sizeof(literal));
                        LIST_FOR_EACH_ENTRY(alu, &cf->alu, list) {
@@ -1625,8 +2532,7 @@ int r600_bc_build(struct r600_bc *bc)
                                }
                        }
                        break;
-               case V_SQ_CF_WORD1_SQ_CF_INST_VTX:
-               case V_SQ_CF_WORD1_SQ_CF_INST_VTX_TC:
+               case CF_CLASS_VERTEX:
                        LIST_FOR_EACH_ENTRY(vtx, &cf->vtx, list) {
                                r = r600_bc_vtx_build(bc, vtx, addr);
                                if (r)
@@ -1634,7 +2540,7 @@ int r600_bc_build(struct r600_bc *bc)
                                addr += 4;
                        }
                        break;
-               case V_SQ_CF_WORD1_SQ_CF_INST_TEX:
+               case CF_CLASS_TEXTURE:
                        LIST_FOR_EACH_ENTRY(tex, &cf->tex, list) {
                                r = r600_bc_tex_build(bc, tex, addr);
                                if (r)
@@ -1642,19 +2548,8 @@ int r600_bc_build(struct r600_bc *bc)
                                addr += 4;
                        }
                        break;
-               case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
-               case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
-               case EG_V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
-               case EG_V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_START_NO_AL:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_END:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_CONTINUE:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_BREAK:
-               case V_SQ_CF_WORD1_SQ_CF_INST_JUMP:
-               case V_SQ_CF_WORD1_SQ_CF_INST_ELSE:
-               case V_SQ_CF_WORD1_SQ_CF_INST_POP:
-               case V_SQ_CF_WORD1_SQ_CF_INST_CALL_FS:
-               case V_SQ_CF_WORD1_SQ_CF_INST_RETURN:
+               case CF_CLASS_EXPORT:
+               case CF_CLASS_OTHER:
                        break;
                default:
                        R600_ERR("unsupported CF instruction (0x%X)\n", cf->inst);
@@ -1730,13 +2625,10 @@ void r600_bc_dump(struct r600_bc *bc)
        LIST_FOR_EACH_ENTRY(cf, &bc->cf, list) {
                id = cf->id;
 
-               switch (cf->inst) {
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER << 3):
-               case (V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_PUSH_BEFORE << 3):
+               switch (r600_bc_cf_class(cf)) {
+               case CF_CLASS_ALU:
                        fprintf(stderr, "%04d %08X ALU ", id, bc->bytecode[id]);
-                       fprintf(stderr, "ADDR:%d ", cf->addr);
+                       fprintf(stderr, "ADDR:%04d ", cf->addr);
                        fprintf(stderr, "KCACHE_MODE0:%X ", cf->kcache[0].mode);
                        fprintf(stderr, "KCACHE_BANK0:%X ", cf->kcache[0].bank);
                        fprintf(stderr, "KCACHE_BANK1:%X\n", cf->kcache[1].bank);
@@ -1746,22 +2638,22 @@ void r600_bc_dump(struct r600_bc *bc)
                        fprintf(stderr, "KCACHE_MODE1:%X ", cf->kcache[1].mode);
                        fprintf(stderr, "KCACHE_ADDR0:%X ", cf->kcache[0].addr);
                        fprintf(stderr, "KCACHE_ADDR1:%X ", cf->kcache[1].addr);
+                       fprintf(stderr, "BARRIER:%d ", cf->barrier);
                        fprintf(stderr, "COUNT:%d\n", cf->ndw / 2);
                        break;
-               case V_SQ_CF_WORD1_SQ_CF_INST_TEX:
-               case V_SQ_CF_WORD1_SQ_CF_INST_VTX:
-               case V_SQ_CF_WORD1_SQ_CF_INST_VTX_TC:
+               case CF_CLASS_TEXTURE:
+               case CF_CLASS_VERTEX:
                        fprintf(stderr, "%04d %08X TEX/VTX ", id, bc->bytecode[id]);
-                       fprintf(stderr, "ADDR:%d\n", cf->addr);
+                       fprintf(stderr, "ADDR:%04d\n", cf->addr);
                        id++;
                        fprintf(stderr, "%04d %08X TEX/VTX ", id, bc->bytecode[id]);
                        fprintf(stderr, "INST:%d ", cf->inst);
+                       fprintf(stderr, "BARRIER:%d ", cf->barrier);
                        fprintf(stderr, "COUNT:%d\n", cf->ndw / 4);
                        break;
-               case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT:
-               case V_SQ_CF_ALLOC_EXPORT_WORD1_SQ_CF_INST_EXPORT_DONE:
+               case CF_CLASS_EXPORT:
                        fprintf(stderr, "%04d %08X EXPORT ", id, bc->bytecode[id]);
-                       fprintf(stderr, "GPR:%X ", cf->output.gpr);
+                       fprintf(stderr, "GPR:%d ", cf->output.gpr);
                        fprintf(stderr, "ELEM_SIZE:%X ", cf->output.elem_size);
                        fprintf(stderr, "ARRAY_BASE:%X ", cf->output.array_base);
                        fprintf(stderr, "TYPE:%X\n", cf->output.type);
@@ -1771,26 +2663,18 @@ void r600_bc_dump(struct r600_bc *bc)
                        fprintf(stderr, "SWIZ_Y:%X ", cf->output.swizzle_y);
                        fprintf(stderr, "SWIZ_Z:%X ", cf->output.swizzle_z);
                        fprintf(stderr, "SWIZ_W:%X ", cf->output.swizzle_w);
-                       fprintf(stderr, "BARRIER:%X ", cf->output.barrier);
-                       fprintf(stderr, "INST:%d ", cf->output.inst);
-                       fprintf(stderr, "BURST_COUNT:%d ", cf->output.burst_count);
-                       fprintf(stderr, "EOP:%X\n", cf->output.end_of_program);
+                       fprintf(stderr, "BARRIER:%d ", cf->barrier);
+                       fprintf(stderr, "INST:%d ", cf->inst);
+                       fprintf(stderr, "BURST_COUNT:%d\n", cf->output.burst_count);
                        break;
-               case V_SQ_CF_WORD1_SQ_CF_INST_JUMP:
-               case V_SQ_CF_WORD1_SQ_CF_INST_ELSE:
-               case V_SQ_CF_WORD1_SQ_CF_INST_POP:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_START_NO_AL:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_END:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_CONTINUE:
-               case V_SQ_CF_WORD1_SQ_CF_INST_LOOP_BREAK:
-               case V_SQ_CF_WORD1_SQ_CF_INST_CALL_FS:
-               case V_SQ_CF_WORD1_SQ_CF_INST_RETURN:
+               case CF_CLASS_OTHER:
                        fprintf(stderr, "%04d %08X CF ", id, bc->bytecode[id]);
-                       fprintf(stderr, "ADDR:%d\n", cf->cf_addr);
+                       fprintf(stderr, "ADDR:%04d\n", cf->cf_addr);
                        id++;
                        fprintf(stderr, "%04d %08X CF ", id, bc->bytecode[id]);
                        fprintf(stderr, "INST:%d ", cf->inst);
                        fprintf(stderr, "COND:%X ", cf->cond);
+                       fprintf(stderr, "BARRIER:%d ", cf->barrier);
                        fprintf(stderr, "POP_COUNT:%X\n", cf->pop_count);
                        break;
                }