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Use IR_HIOP for generalized two-register returns.

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Sponsored by OpenResty Inc.
This commit is contained in:
Mike Pall
2021-09-19 17:47:11 +02:00
parent c6f5ef649b
commit 986bb406ad
8 changed files with 84 additions and 96 deletions
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29
src/lj_asm_ppc.h
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@@ -340,10 +340,8 @@ static void asm_setupresult(ASMState *as, IRIns *ir, const CCallInfo *ci)
} else {
ra_destreg(as, ir, RID_FPRET);
}
#if LJ_32
} else if (hiop) {
ra_destpair(as, ir);
#endif
} else {
ra_destreg(as, ir, RID_RET);
}
@@ -1942,15 +1940,15 @@ static void asm_comp64(ASMState *as, IRIns *ir)
}
#endif
/* -- Support for 64 bit ops in 32 bit mode ------------------------------- */
/* -- Split register ops -------------------------------------------------- */
/* Hiword op of a split 64 bit op. Previous op must be the loword op. */
/* Hiword op of a split 32/32 bit op. Previous op is be the loword op. */
static void asm_hiop(ASMState *as, IRIns *ir)
{
#if LJ_HASFFI || LJ_SOFTFP
/* HIOP is marked as a store because it needs its own DCE logic. */
int uselo = ra_used(ir-1), usehi = ra_used(ir); /* Loword/hiword used? */
if (LJ_UNLIKELY(!(as->flags & JIT_F_OPT_DCE))) uselo = usehi = 1;
#if LJ_HASFFI || LJ_SOFTFP
if ((ir-1)->o == IR_CONV) { /* Conversions to/from 64 bit. */
as->curins--; /* Always skip the CONV. */
#if LJ_HASFFI && !LJ_SOFTFP
@@ -1985,12 +1983,16 @@ static void asm_hiop(ASMState *as, IRIns *ir)
}
return;
}
#endif
if (!usehi) return; /* Skip unused hiword op for all remaining ops. */
switch ((ir-1)->o) {
#if LJ_HASFFI
case IR_ADD: as->curins--; asm_add64(as, ir); break;
case IR_SUB: as->curins--; asm_sub64(as, ir); break;
case IR_NEG: as->curins--; asm_neg64(as, ir); break;
case IR_CNEWI:
/* Nothing to do here. Handled by lo op itself. */
break;
#endif
#if LJ_SOFTFP
case IR_SLOAD: case IR_ALOAD: case IR_HLOAD: case IR_ULOAD: case IR_VLOAD:
@@ -1998,25 +2000,16 @@ static void asm_hiop(ASMState *as, IRIns *ir)
if (!uselo)
ra_allocref(as, ir->op1, RSET_GPR); /* Mark lo op as used. */
break;
case IR_ASTORE: case IR_HSTORE: case IR_USTORE: case IR_TOSTR: case IR_TMPREF:
/* Nothing to do here. Handled by lo op itself. */
break;
#endif
case IR_CALLN:
case IR_CALLS:
case IR_CALLXS:
case IR_CALLN: case IR_CALLL: case IR_CALLS: case IR_CALLXS:
if (!uselo)
ra_allocref(as, ir->op1, RID2RSET(RID_RETLO)); /* Mark lo op as used. */
break;
#if LJ_SOFTFP
case IR_ASTORE: case IR_HSTORE: case IR_USTORE: case IR_TOSTR: case IR_TMPREF:
#endif
case IR_CNEWI:
/* Nothing to do here. Handled by lo op itself. */
break;
default: lj_assertA(0, "bad HIOP for op %d", (ir-1)->o); break;
}
#else
/* Unused without SOFTFP or FFI. */
UNUSED(as); UNUSED(ir); lj_assertA(0, "unexpected HIOP");
#endif
}
/* -- Profiling ----------------------------------------------------------- */