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Overview
Comment:Slightly smaller and faster implementation of OP_If and OP_IfNot.
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SHA3-256:6ab42934e2c4957b5d8927bf4434a9db07ab6078987a6a2d25f35cc468d21203
User & Date: drh 2018-01-25 01:20:29
Context
2018-01-25
20:50
Reorganize zipfile.c code to make it easier to add support for in-memory zip archive processing. check-in: 30b92582 user: dan tags: trunk
01:20
Slightly smaller and faster implementation of OP_If and OP_IfNot. check-in: 6ab42934 user: drh tags: trunk
2018-01-24
20:42
When unpacking a sorter record, do so from right to left instead of left to right, since by starting with the right-most column, the work done by OP_Column opcodes is reduced. check-in: 8055e4f4 user: drh tags: trunk
Changes
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Changes to src/vdbe.c.

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case OP_If:                 /* jump, in1 */
case OP_IfNot: {            /* jump, in1 */
  int c;
  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ){
    c = pOp->p3;
  }else{
#ifdef SQLITE_OMIT_FLOATING_POINT
    c = sqlite3VdbeIntValue(pIn1)!=0;
#else
    c = sqlite3VdbeRealValue(pIn1)!=0.0;
#endif

    if( pOp->opcode==OP_IfNot ) c = !c;
  }
  VdbeBranchTaken(c!=0, 2);
  if( c ){
    goto jump_to_p2;
  }
  break;







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case OP_If:                 /* jump, in1 */
case OP_IfNot: {            /* jump, in1 */
  int c;
  pIn1 = &aMem[pOp->p1];
  if( pIn1->flags & MEM_Null ){
    c = pOp->p3;
  }else{
    if( pIn1->flags & MEM_Int ){
      c = pIn1->u.i!=0;
    }else{
      c = sqlite3VdbeRealValue(pIn1)!=0.0;

    }
    if( pOp->opcode==OP_IfNot ) c = !c;
  }
  VdbeBranchTaken(c!=0, 2);
  if( c ){
    goto jump_to_p2;
  }
  break;