mirror of
git://projects.qi-hardware.com/wernermisc.git
synced 2024-11-15 09:50:37 +02:00
m1/perf/sched.c: synchronize with upstream version
This commit is contained in:
Werner Almesberger
parent
8b4ef502d7
commit
9e32d56ce9
225
m1/perf/sched.c
225
m1/perf/sched.c
@ -1,7 +1,7 @@
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/*
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* sched.c - O(n) ... O(n^2) scheduler
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* lnfpus.c - O(n) ... O(n^2) scheduler
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*
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* Written 2011 by Werner Almesberger
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* Copyright (C) 2011 Werner Almesberger
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*
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* Based on gfpus.c
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* Copyright (C) 2007, 2008, 2009, 2010 Sebastien Bourdeauducq
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@ -123,7 +123,7 @@ static void get_registers(struct fpvm_fragment *fragment,
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} fconv;
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for(i = 0; i < fragment->nbindings; i++)
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if (fragment->bindings[i].isvar)
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if(fragment->bindings[i].isvar)
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registers[i] = 0;
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else {
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fconv.f = fragment->bindings[i].b.c;
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@ -176,7 +176,7 @@ static void *list_pop(struct list *list)
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struct list *first;
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first = list->next;
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if (first == list)
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if(first == list)
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return NULL;
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list_del(first);
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return first;
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@ -203,7 +203,7 @@ static void list_add(struct list *list, struct list *item)
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static void list_concat(struct list *a, struct list *b)
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{
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if (b->next != b) {
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if(b->next != b) {
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a->prev->next = b->next;
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b->next->prev = a->prev;
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b->prev->next = a;
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@ -218,7 +218,7 @@ static void list_concat(struct list *a, struct list *b)
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*/
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#define foreach(var, head) \
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for (var = (void *) ((head))->next; \
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for(var = (void *) ((head))->next; \
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(var) != (void *) (head); \
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var = (void *) ((struct list *) (var))->next)
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@ -238,17 +238,17 @@ static int alloc_reg(struct insn *setter)
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int vm_reg, pfpu_reg, vm_idx;
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vm_reg = setter->vm_insn->dest;
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if (vm_reg >= 0) {
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if(vm_reg >= 0) {
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pfpu_reg = vm_reg;
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sc->pfpu_regs[vm_reg].vm_reg = vm_reg; /* @@@ global init */
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} else {
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reg = list_pop(&sc->unallocated);
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if (!reg)
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if(!reg)
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return -1;
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#ifdef REG_STATS
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sc->curr_regs++;
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if (sc->curr_regs > sc->max_regs)
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if(sc->curr_regs > sc->max_regs)
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sc->max_regs = sc->curr_regs;
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#endif
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@ -272,14 +272,14 @@ static void put_reg(int vm_reg)
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int vm_idx;
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struct vm_reg *reg;
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if (vm_reg >= 0)
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if(vm_reg >= 0)
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return;
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vm_idx = vm_reg2idx(vm_reg);
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reg = sc->regs+vm_idx;
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assert(reg->refs);
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if (--reg->refs)
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if(--reg->refs)
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return;
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Dprintf(" free reg %d\n", reg->pfpu_reg);
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@ -309,7 +309,7 @@ static int lookup_pfpu_reg(int vm_reg)
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static void mark(int vm_reg)
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{
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if (vm_reg > 0)
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if(vm_reg > 0)
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sc->pfpu_regs[vm_reg].used = 1;
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}
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@ -319,22 +319,17 @@ static int init_registers(struct fpvm_fragment *frag,
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{
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int i;
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sc->regs =
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calloc(frag->nbindings-frag->next_sur, sizeof(struct vm_reg));
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if (!sc->regs)
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return -1;
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get_registers(frag, registers);
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for (i = 0; i != frag->ninstructions; i++) {
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for(i = 0; i != frag->ninstructions; i++) {
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mark(frag->code[i].opa);
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mark(frag->code[i].opb);
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mark(frag->code[i].dest);
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}
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list_init(&sc->unallocated);
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for (i = PFPU_SPREG_COUNT; i != PFPU_REG_COUNT; i++)
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if (!sc->pfpu_regs[i].used)
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for(i = PFPU_SPREG_COUNT; i != PFPU_REG_COUNT; i++)
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if(!sc->pfpu_regs[i].used)
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list_add_tail(&sc->unallocated, &sc->pfpu_regs[i].more);
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return 0;
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@ -352,9 +347,9 @@ static struct vm_reg *add_data_ref(struct insn *insn, struct data_ref *ref,
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reg = sc->regs+vm_reg2idx(reg_num);
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ref->insn = insn;
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ref->dep = reg->setter;
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if (insn->vm_insn->dest == reg_num)
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if(insn->vm_insn->dest == reg_num)
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insn->rmw = 1;
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if (!ref->dep)
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if(!ref->dep)
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reg->refs++;
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else {
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list_add_tail(&ref->dep->dependants, &ref->more);
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@ -378,45 +373,45 @@ static void init_scheduler(struct fpvm_fragment *frag)
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list_init(&sc->unscheduled);
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list_init(&sc->waiting);
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for (i = 0; i != PFPU_PROGSIZE; i++)
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for(i = 0; i != PFPU_PROGSIZE; i++)
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list_init(sc->ready+i);
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for (i = 0; i != frag->ninstructions; i++) {
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for(i = 0; i != frag->ninstructions; i++) {
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insn = sc->insns+i;
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insn->vm_insn = frag->code+i;
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insn->arity = fpvm_get_arity(frag->code[i].opcode);
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insn->latency = pfpu_get_latency(frag->code[i].opcode);
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list_init(&insn->dependants);
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switch (insn->arity) {
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case 3:
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add_data_ref(insn, &insn->cond, FPVM_REG_IFB);
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/* fall through */
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case 2:
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add_data_ref(insn, &insn->opb, frag->code[i].opb);
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/* fall through */
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case 1:
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add_data_ref(insn, &insn->opa, frag->code[i].opa);
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/* fall through */
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case 0:
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reg = sc->regs+vm_reg2idx(frag->code[i].dest);
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if (reg->setter) {
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reg->setter->next_setter = insn;
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foreach (ref, ®->setter->dependants)
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if (ref->insn != insn)
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case 3:
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add_data_ref(insn, &insn->cond, FPVM_REG_IFB);
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/* fall through */
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case 2:
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add_data_ref(insn, &insn->opb, frag->code[i].opb);
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/* fall through */
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case 1:
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add_data_ref(insn, &insn->opa, frag->code[i].opa);
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/* fall through */
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case 0:
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reg = sc->regs+vm_reg2idx(frag->code[i].dest);
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if(reg->setter) {
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reg->setter->next_setter = insn;
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foreach(ref, ®->setter->dependants)
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if(ref->insn != insn)
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insn->unresolved++;
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if(!insn->rmw)
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insn->unresolved++;
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if (!insn->rmw)
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insn->unresolved++;
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} else {
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if (!insn->rmw)
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insn->unresolved += reg->refs;
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reg->first_setter = insn;
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}
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reg->setter = insn;
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break;
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default:
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abort();
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} else {
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if(!insn->rmw)
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insn->unresolved += reg->refs;
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reg->first_setter = insn;
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}
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reg->setter = insn;
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break;
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default:
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abort();
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}
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if (insn->unresolved)
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if(insn->unresolved)
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list_add_tail(&sc->unscheduled, &insn->more);
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else
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list_add_tail(&sc->ready[0], &insn->more);
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@ -425,7 +420,7 @@ static void init_scheduler(struct fpvm_fragment *frag)
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#ifdef LCPF
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struct data_ref *dep;
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for (i = frag->ninstructions-1; i >= 0; i--) {
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for(i = frag->ninstructions-1; i >= 0; i--) {
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insn = sc->insns+i;
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#if 0
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/*
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@ -435,15 +430,15 @@ static void init_scheduler(struct fpvm_fragment *frag)
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* This is a degenerate case that's probably not worth
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* spending much effort on.
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*/
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if (insn->next_setter) {
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if(insn->next_setter) {
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insn->distance =
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insn->next_setter->distance-insn->distance+1;
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if (insn->distance < 1)
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if(insn->distance < 1)
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insn->distance = 1;
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}
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#endif
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foreach (dep, &insn->dependants)
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if (dep->insn->distance > insn->distance)
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foreach(dep, &insn->dependants)
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if(dep->insn->distance > insn->distance)
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insn->distance = dep->insn->distance;
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/*
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* While it would be more correct to add one for the cycle
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@ -463,12 +458,12 @@ static void unblock(struct insn *insn)
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int slot;
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assert(insn->unresolved);
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if (--insn->unresolved)
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if(--insn->unresolved)
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return;
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Dprintf(" unblocked %lu -> %u\n", insn-sc->insns, insn->earliest);
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list_del(&insn->more);
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slot = insn->earliest;
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if (slot <= sc->cycle)
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if(slot <= sc->cycle)
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slot = sc->cycle+1;
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list_add_tail(sc->ready+slot, &insn->more);
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}
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@ -479,13 +474,13 @@ static void put_reg_by_ref(struct data_ref *ref, int vm_reg)
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struct insn *setter = ref->dep;
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struct vm_reg *reg;
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if (setter) {
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if(setter) {
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put_reg(setter->vm_insn->dest);
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if (setter->next_setter && setter->next_setter != ref->insn)
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if(setter->next_setter && setter->next_setter != ref->insn)
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unblock(setter->next_setter);
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} else {
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reg = sc->regs+vm_reg2idx(vm_reg);
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if (reg->first_setter && !reg->first_setter->rmw)
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if(reg->first_setter && !reg->first_setter->rmw)
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unblock(reg->first_setter);
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}
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}
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@ -493,7 +488,7 @@ static void put_reg_by_ref(struct data_ref *ref, int vm_reg)
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static void unblock_after(struct insn *insn, int cycle)
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{
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if (insn->earliest <= cycle)
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if(insn->earliest <= cycle)
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insn->earliest = cycle+1;
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unblock(insn);
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}
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@ -511,32 +506,32 @@ static int issue(struct insn *insn, unsigned *code)
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insn->vm_insn->opb);
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switch (insn->arity) {
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case 3:
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put_reg_by_ref(&insn->cond, FPVM_REG_IFB);
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/* fall through */
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case 2:
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CODE(sc->cycle).opb = lookup_pfpu_reg(insn->vm_insn->opb);
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put_reg_by_ref(&insn->opb, insn->vm_insn->opb);
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/* fall through */
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case 1:
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CODE(sc->cycle).opa = lookup_pfpu_reg(insn->vm_insn->opa);
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put_reg_by_ref(&insn->opa, insn->vm_insn->opa);
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break;
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case 0:
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break;
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default:
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abort();
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case 3:
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put_reg_by_ref(&insn->cond, FPVM_REG_IFB);
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/* fall through */
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case 2:
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CODE(sc->cycle).opb = lookup_pfpu_reg(insn->vm_insn->opb);
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put_reg_by_ref(&insn->opb, insn->vm_insn->opb);
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/* fall through */
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case 1:
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CODE(sc->cycle).opa = lookup_pfpu_reg(insn->vm_insn->opa);
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put_reg_by_ref(&insn->opa, insn->vm_insn->opa);
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break;
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case 0:
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break;
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default:
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abort();
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}
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reg = alloc_reg(insn);
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if (reg < 0)
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if(reg < 0)
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return -1;
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CODE(end).dest = reg;
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CODE(sc->cycle).opcode = fpvm_to_pfpu(insn->vm_insn->opcode);
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foreach (ref, &insn->dependants)
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foreach(ref, &insn->dependants)
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unblock_after(ref->insn, end);
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if (insn->next_setter && !insn->next_setter->rmw)
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if(insn->next_setter && !insn->next_setter->rmw)
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unblock_after(insn->next_setter,
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end-insn->next_setter->latency);
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@ -550,7 +545,7 @@ static int count(const struct list *list)
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int n = 0;
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const struct list *p;
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for (p = list->next; p != list; p = p->next)
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for(p = list->next; p != list; p = p->next)
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n++;
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return n;
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}
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@ -565,8 +560,8 @@ static int schedule(unsigned int *code)
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struct insn *best;
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remaining = sc->frag->ninstructions;
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for (i = 0; remaining; i++) {
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if (i == PFPU_PROGSIZE)
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for(i = 0; remaining; i++) {
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if(i == PFPU_PROGSIZE)
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return -1;
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sc->cycle = i;
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@ -575,13 +570,13 @@ static int schedule(unsigned int *code)
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list_concat(&sc->waiting, sc->ready+i);
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best = NULL;
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foreach (insn, &sc->waiting) {
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foreach(insn, &sc->waiting) {
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end = i+insn->latency;
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if (end >= PFPU_PROGSIZE)
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if(end >= PFPU_PROGSIZE)
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return -1;
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if (!CODE(end).dest) {
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if(!CODE(end).dest) {
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#ifdef LCPF
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if (!best || best->distance < insn->distance)
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if(!best || best->distance < insn->distance)
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best = insn;
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#else
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best = insn;
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@ -589,13 +584,13 @@ static int schedule(unsigned int *code)
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#endif
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}
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}
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if (best) {
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if (issue(best, code) < 0)
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if(best) {
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if(issue(best, code) < 0)
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return -1;
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list_del(&best->more);
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remaining--;
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}
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if (CODE(i).dest)
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if(CODE(i).dest)
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put_reg(sc->pfpu_regs[CODE(i).dest].vm_reg);
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}
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@ -604,10 +599,10 @@ static int schedule(unsigned int *code)
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*/
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last = i;
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end = i+MAX_LATENCY;
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if (end > PFPU_PROGSIZE)
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if(end > PFPU_PROGSIZE)
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end = PFPU_PROGSIZE;
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while (i != end) {
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if (CODE(i).dest)
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while(i != end) {
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if(CODE(i).dest)
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last = i+1;
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i++;
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}
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@ -615,33 +610,29 @@ static int schedule(unsigned int *code)
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}
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static int init_scheduler_context(struct fpvm_fragment *frag,
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unsigned int *reg)
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{
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sc = calloc(1, sizeof(*sc));
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if (!sc)
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return -1;
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sc->frag = frag;
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if (init_registers(frag, reg) < 0) {
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free(sc);
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return -1;
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}
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init_scheduler(frag);
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return 0;
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}
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int gfpus_schedule(struct fpvm_fragment *frag, unsigned int *code,
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unsigned int *reg)
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{
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/*
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* allocate context and registers on stack because standalone FN has no
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* memory allocator
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*/
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struct sched_ctx sc_alloc;
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struct vm_reg regs[frag->nbindings-frag->next_sur];
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pfpu_instruction vecout;
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int res;
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if (init_scheduler_context(frag, reg) < 0)
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printf("greetings %lu %lu\n", sizeof(*sc), sizeof(regs));
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sc = &sc_alloc;
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memset(sc, 0, sizeof(*sc));
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sc->frag = frag;
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sc->regs = regs;
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memset(regs, 0, sizeof(regs));
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if(init_registers(frag, reg) < 0)
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return -1;
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init_scheduler(frag);
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memset(code, 0, PFPU_PROGSIZE*sizeof(*code));
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res = schedule(code);
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@ -649,13 +640,11 @@ int gfpus_schedule(struct fpvm_fragment *frag, unsigned int *code,
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printf("regs: %d/%d\n", sc->curr_regs, sc->max_regs);
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#endif
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free(sc->regs);
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free(sc);
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if (res < 0)
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if(res < 0)
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return res;
|
||||
if (frag->vector_mode)
|
||||
if(frag->vector_mode)
|
||||
return res;
|
||||
if (res == PFPU_PROGSIZE)
|
||||
if(res == PFPU_PROGSIZE)
|
||||
return -1;
|
||||
|
||||
vecout.w = 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user