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Simplify helper routines for soft-float targets. Add POW rejoin.

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This commit is contained in:
Mike Pall
2011-05-26 18:01:55 +02:00
parent ae3179926a
commit 625ef8626f
4 changed files with 89 additions and 15 deletions
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20
src/lj_opt_split.c
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@@ -191,6 +191,7 @@ static void split_ir(jit_State *J)
/* Remove all IR instructions, but retain IR constants. */
J->cur.nins = REF_FIRST;
J->loopref = 0;
/* Process constants and fixed references. */
for (ref = nk; ref <= REF_BASE; ref++) {
@@ -243,6 +244,25 @@ static void split_ir(jit_State *J)
hi = split_call_li(J, hisubst, oir, ir, IRCALL_lj_vm_powi);
break;
case IR_FPMATH:
/* Try to rejoin pow from EXP2, MUL and LOG2. */
if (nir->op2 == IRFPM_EXP2 && nir->op1 > J->loopref) {
IRIns *irp = IR(nir->op1);
if (irp->o == IR_CALLN && irp->op2 == IRCALL_softfp_mul) {
IRIns *irm4 = IR(irp->op1);
IRIns *irm3 = IR(irm4->op1);
IRIns *irm12 = IR(irm3->op1);
IRIns *irl1 = IR(irm12->op1);
if (irm12->op1 > J->loopref && irl1->o == IR_CALLN &&
irl1->op2 == IRCALL_log2) {
IRRef tmp = irl1->op1; /* Recycle first two args from LOG2. */
tmp = split_emit(J, IRT(IR_CARG, IRT_NIL), tmp, irm3->op2);
tmp = split_emit(J, IRT(IR_CARG, IRT_NIL), tmp, irm4->op2);
ir->prev = tmp = split_emit(J, IRTI(IR_CALLN), tmp, IRCALL_pow);
hi = split_emit(J, IRT(IR_HIOP, LJ_SOFTFP), tmp, tmp);
break;
}
}
}
hi = split_call_l(J, hisubst, oir, ir, IRCALL_lj_vm_floor + ir->op2);
break;
case IR_ATAN2: