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AArch64 cannot compare shorts directly

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Walter Bright 2025-03-24 19:02:19 -07:00 • committed by Nicholas Wilson
parent 8c4a95f083
commit 2c8d214650
1 changed files with 12 additions and 6 deletions
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18
compiler/src/dmd/backend/cgelem.d
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@ -4432,13 +4432,19 @@ private elem* elcmp(elem* e, Goal goal)
tym_t tym;
int sz = tysize(e2.Ety);
if (e1.Eoper == OPu16_32 && e2.Vulong <= cast(targ_ulong) SHORTMASK ||
e1.Eoper == OPs16_32 &&
e2.Vlong == cast(targ_short) e2.Vlong)
/* The AArch64 does not have a compare short instruction, so the comparisons
* have to be done with the LDRH, etc., instructions
*/
if (config.target_cpu != TARGET_AArch64)
{
tym = (uns || e1.Eoper == OPu16_32) ? TYushort : TYshort;
e.E2 = el_una(OP32_16,tym,e2);
goto L2;
if (e1.Eoper == OPu16_32 && e2.Vulong <= cast(targ_ulong) SHORTMASK ||
e1.Eoper == OPs16_32 &&
e2.Vlong == cast(targ_short) e2.Vlong)
{
tym = (uns || e1.Eoper == OPu16_32) ? TYushort : TYshort;
e.E2 = el_una(OP32_16,tym,e2);
goto L2;
}
}
/* Try to convert to byte/word comparison for ((x & c)==d)