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Add support for integer add/subtract.

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Still need to support floating point operations. Multiplication is a
little more complicated because it doesn't set the overflow flag.
This commit is contained in:
Michael Munday 2016-12-20 09:41:19 -05:00
parent 5076a3ee2e
commit 5df5e1f144
1 changed files with 49 additions and 4 deletions
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53
src/vm_s390x.dasc
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@ -1172,13 +1172,58 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
| stg r0, 0(r0)
| stg r0, 0(r0)
break;
/* -- Binary ops -------------------------------------------------------- */
|.macro ins_arithpre
| ins_ABC
| sllg RB, RB, 3(r0)
| sllg RC, RC, 3(r0)
| sllg RA, RA, 3(r0)
|.endmacro
|
|.macro ins_arithdn, intins
| ins_arithpre
||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
||switch (vk) {
||case 0:
| lg RB, 0(RB, BASE)
| lg RC, 0(RC, KBASE)
| checkint RB, ->vmeta_arith_vno
| checkint RC, ->vmeta_arith_vno
| intins RB, RC; jo ->vmeta_arith_vno
|| break;
||case 1:
| lg RB, 0(RB, BASE)
| lg RC, 0(RC, KBASE)
| checkint RB, ->vmeta_arith_nvo
| checkint RC, ->vmeta_arith_nvo
| intins RC, RB; jo ->vmeta_arith_nvo
|| break;
||default:
| lg RB, 0(RB, BASE)
| lg RC, 0(RC, BASE)
| checkint RB, ->vmeta_arith_vvo
| checkint RC, ->vmeta_arith_vvo
| intins RB, RC; jo ->vmeta_arith_vvo
|| break;
||}
||if (vk == 1) {
| // setint RC
| stg RC, 0(RA, BASE)
||} else {
| // setint RB
| stg RB, 0(RA, BASE)
||}
| ins_next
|.endmacro
| // RA = dst, RB = src1 or num const, RC = src2 or num const
case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
| stg r0, 0(r0)
| stg r0, 0(r0)
| ins_arithdn ar
break;
case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
| stg r0, 0(r0)
| stg r0, 0(r0)
| ins_arithdn sr
break;
case BC_MULVN: case BC_MULNV: case BC_MULVV:
| stg r0, 0(r0)