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Implement unary minus.

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This commit is contained in:
Michael Munday 2016-12-21 14:03:58 -05:00
parent 9da6ff7ea3
commit e19544ae9a
1 changed files with 23 additions and 4 deletions
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27
src/vm_s390x.dasc
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@ -710,8 +710,11 @@ static void build_subroutines(BuildCtx *ctx)
| j >1
|
|->vmeta_unm:
| stg r0, 0(r0)
| stg r0, 0(r0)
| llgh RD, PC_RD
| sllg RD, RD, 3(r0)
| la RC, 0(RD, BASE)
| lgr RB, RC
| j >1
|
|->vmeta_arith_vvo:
| llgc RB, PC_RB
@ -1508,8 +1511,24 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
| ins_next
break;
case BC_UNM:
| stg r0, 0(r0)
| stg r0, 0(r0)
| ins_AD // RA = dst, RD = src
| sllg RA, RA, 3(r0)
| sllg RD, RD, 3(r0)
| lg RB, 0(RD, BASE)
| checkint RB, >3
| lcr RB, RB; jo >2
|1:
| stg RB, 0(RA, BASE)
| ins_next
|2:
| llihh RB, 0x41e0 // (double)2^31
| j <1
|3:
| jh ->vmeta_unm
| // Toggle sign bit.
| llihh TMPR2, 0x8000
| xgr RB, TMPR2
| j <1
break;
case BC_LEN:
| stg r0, 0(r0)