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ARM: Don't use argument GPRs to rematerialize FPR arguments.

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This commit is contained in:
Mike Pall 2012-08-19 18:43:04 +02:00
parent 1481263aaa
commit ceaa60c0c7
1 changed files with 15 additions and 4 deletions
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19
src/lj_asm_arm.h
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@ -339,18 +339,27 @@ static void asm_gencall(ASMState *as, const CCallInfo *ci, IRRef *args)
{
uint32_t n, nargs = CCI_NARGS(ci);
int32_t ofs = 0;
#if LJ_SOFTFP
Reg gpr = REGARG_FIRSTGPR;
#if !LJ_SOFTFP
Reg fpr = REGARG_FIRSTFPR, fprodd = 0;
#else
Reg gpr, fpr = REGARG_FIRSTFPR, fprodd = 0;
#endif
if ((void *)ci->func)
emit_call(as, (void *)ci->func);
#if !LJ_SOFTFP
for (gpr = REGARG_FIRSTGPR; gpr <= REGARG_LASTGPR; gpr++)
as->cost[gpr] = REGCOST(~0u, 0u);
gpr = REGARG_FIRSTGPR;
#endif
for (n = 0; n < nargs; n++) { /* Setup args. */
IRRef ref = args[n];
IRIns *ir = IR(ref);
#if !LJ_SOFTFP
if (irt_isfp(ir->t)) {
RegSet of = as->freeset;
Reg src;
/* Workaround to protect argument GPRs from being used for remat. */
as->freeset &= ~RSET_RANGE(REGARG_FIRSTGPR, REGARG_LASTGPR+1);
if (!LJ_ABI_SOFTFP && !(ci->flags & CCI_VARARG)) {
if (irt_isnum(ir->t)) {
if (fpr <= REGARG_LASTFPR) {
@ -368,15 +377,17 @@ static void asm_gencall(ASMState *as, const CCallInfo *ci, IRRef *args)
fprodd = fpr++;
continue;
}
src = ra_alloc1(as, ref, RSET_FPR);
src = ra_alloc1(as, ref, RSET_FPR); /* May alloc GPR to remat FPR. */
fprodd = 0;
goto stackfp;
}
src = ra_alloc1(as, ref, RSET_FPR);
src = ra_alloc1(as, ref, RSET_FPR); /* May alloc GPR to remat FPR. */
as->freeset |= (of & RSET_RANGE(REGARG_FIRSTGPR, REGARG_LASTGPR+1));
if (irt_isnum(ir->t)) gpr = (gpr+1) & ~1u;
if (gpr <= REGARG_LASTGPR) {
lua_assert(rset_test(as->freeset, gpr)); /* Must have been evicted. */
if (irt_isnum(ir->t)) {
lua_assert(rset_test(as->freeset, gpr+1)); /* Ditto. */
emit_dnm(as, ARMI_VMOV_RR_D, gpr, gpr+1, (src & 15));
gpr += 2;
} else {