DrSocalkwe3n/luajit
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86: Fix register allocation for calls returning register pair.

Browse Source
This commit is contained in:
Mike Pall
2012-09-27 14:16:18 +02:00
parent cfca926cc2
commit 0ecdff43e8
3 changed files with 12 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/lj_asm.c
View File

@@ -719,7 +719,7 @@ static void ra_leftov(ASMState *as, Reg dest, IRRef lref)
}
#endif
#if !LJ_TARGET_X86ORX64
#if !LJ_64
/* Force a RID_RETLO/RID_RETHI destination register pair (marked as free). */
static void ra_destpair(ASMState *as, IRIns *ir)
{
@@ -747,9 +747,13 @@ static void ra_destpair(ASMState *as, IRIns *ir)
/* Check for conflicts and shuffle the registers as needed. */
if (destlo == RID_RETHI) {
if (desthi == RID_RETLO) {
#if LJ_TARGET_X86
*--as->mcp = XI_XCHGa + RID_RETHI;
#else
emit_movrr(as, ir, RID_RETHI, RID_TMP);
emit_movrr(as, ir, RID_RETLO, RID_RETHI);
emit_movrr(as, ir, RID_TMP, RID_RETLO);
#endif
} else {
emit_movrr(as, ir, RID_RETHI, RID_RETLO);
if (desthi != RID_RETHI) emit_movrr(as, ir, desthi, RID_RETHI);