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Fix BC_UNM of 0 on s390x #259

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Fix BC_UNM of 0 on s390x #259

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9 changes: 6 additions & 3 deletions src/vm_s390x.dasc
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Original file line number Diff line number Diff line change
Expand Up @@ -2614,15 +2614,18 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
| sllg RA, RA, 3
| sllg RD, RD, 3
| lg RB, 0(RD, BASE)
| checkint RB, >3
| lcr RB, RB; jo >2
| checkint RB, >4
| lcr RB, RB; je >2; jo >3
|1:
| stg RB, 0(RA, BASE)
| ins_next
|2:
| llihh RB, 0x41e0 // (double)2^31
| llihh RB, 0x8000 // (double)-0
| j <1
|3:
| llihh RB, 0x41e0 // (double)2^31
| j <1
|4:
| jh ->vmeta_unm
| // Toggle sign bit.
| llihh TMPR0, 0x8000
Expand Down