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r300/compiler: Correctly calculate the max number of iterations for loops.

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This commit is contained in:
Tom Stellard
2010-06-12 22:12:32 -07:00
committed by Marek Olšák
parent 697d666d78
commit 29a1d6aee7
1 changed files with 8 additions and 17 deletions
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src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.c
+8 -17
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@@ -78,22 +78,13 @@ static int src_reg_is_immediate(struct rc_src_register * src,
c->Program.Constants.Constants[src->Index].Type==RC_CONSTANT_IMMEDIATE;
}
static unsigned int loop_count_instructions(struct loop_info * loop)
static unsigned int loop_calc_iterations(struct emulate_loop_state *s,
struct loop_info * loop, unsigned int max_instructions)
{
unsigned int count = 0;
struct rc_instruction * inst = loop->BeginLoop->Next;
while(inst != loop->EndLoop){
count++;
inst = inst->Next;
}
return count;
}
static unsigned int loop_calc_iterations(struct loop_info * loop,
unsigned int loop_count, unsigned int max_instructions)
{
unsigned int icount = loop_count_instructions(loop);
return max_instructions / (loop_count * icount);
unsigned int total_i = rc_recompute_ips(s->C);
unsigned int loop_i = (loop->EndLoop->IP - loop->BeginLoop->IP) - 1;
/* +1 because the program already has one iteration of the loop. */
return 1 + ((max_instructions - total_i) / (s->LoopCount * loop_i));
}
static void loop_unroll(struct emulate_loop_state * s,
@@ -439,8 +430,8 @@ void rc_emulate_loops(struct emulate_loop_state *s,
if(!s->Loops[i].EndLoop){
continue;
}
unsigned int iterations = loop_calc_iterations(&s->Loops[i],
s->LoopCount, max_instructions);
unsigned int iterations = loop_calc_iterations(s, &s->Loops[i],
max_instructions);
loop_unroll(s, &s->Loops[i], iterations);
}
}