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[Dotgnu-pnet-commits] CVS: pnet/cscc/csharp cs_oper.tc,1.31,1.32
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From: |
Gopal.V <address@hidden> |
|
Subject: |
[Dotgnu-pnet-commits] CVS: pnet/cscc/csharp cs_oper.tc,1.31,1.32 |
|
Date: |
Thu, 21 Nov 2002 04:52:28 -0500 |
Update of /cvsroot/dotgnu-pnet/pnet/cscc/csharp
In directory subversions:/tmp/cvs-serv32307/cscc/csharp
Modified Files:
cs_oper.tc
Log Message:
move arithmetic optimisations into codegen
Index: cs_oper.tc
===================================================================
RCS file: /cvsroot/dotgnu-pnet/pnet/cscc/csharp/cs_oper.tc,v
retrieving revision 1.31
retrieving revision 1.32
diff -C2 -r1.31 -r1.32
*** cs_oper.tc 20 Nov 2002 21:08:49 -0000 1.31
--- cs_oper.tc 21 Nov 2002 09:52:26 -0000 1.32
***************
*** 126,345 ****
/*
- * Bit count stuff to get the correct power of 2 for stuff
- */
- static int IsPowOfTwo(ILEvalValue evalValue)
- {
- int bitpos=-1;
- int bitcount=0;
- ILUInt32 word;
- if(evalValue.un.i4Value < 0)
- {
- switch(evalValue.valueType)
- {
- case ILMachineType_UInt8:
- case ILMachineType_UInt16:
- case ILMachineType_UInt32:
- case ILMachineType_UInt64:
- break;
- default:
- return -1;
- }
- }
- for(word=evalValue.un.i4Value;word!=0;word=word>>1)
- {
- if(word & 0x01)bitcount++;
- bitpos++;
- }
- if(bitcount==1)return bitpos;
- return -1;
- }
- /*
- * Reduce operator strength for operators
- */
- static void ReduceOperator(ILGenInfo *info, ILNode *node,
- ILNode **parent, CSSemValue
*result)
- {
- ILEvalValue evalValue;
- ILNode_BinaryExpression *expr;
- int bitpos;
- if(info->overflowInsns || !(info->optimizeFlag))
- {
- return;
- }
- if(yyisa(node,ILNode_BinaryExpression))
- {
- expr=(ILNode_BinaryExpression*)(node);
- switch(ILNode_GetType(expr->expr1,info))
- {
- case ILMachineType_Int8:
- case ILMachineType_UInt8:
- case ILMachineType_Int16:
- case ILMachineType_UInt16:
- case ILMachineType_Int32:
- case ILMachineType_UInt32:
- case ILMachineType_Int64:
- case ILMachineType_UInt64:
- break;
- default:
- return; // expr1 not integer
- }
- switch(ILNode_GetType(expr->expr2,info))
- {
- case ILMachineType_Int8:
- case ILMachineType_UInt8:
- case ILMachineType_Int16:
- case ILMachineType_UInt16:
- case ILMachineType_Int32:
- case ILMachineType_UInt32:
- case ILMachineType_Int64:
- case ILMachineType_UInt64:
- break;
- default:
- return; // expr2 not integer
- }
- /*
- * NOTE:
- * expr1 < expr2
- * Multiply: expr2 << value1, 0
- * Div: 0
- */
- if(ILNode_GetType(expr->expr1,info) <
ILNode_GetType(expr->expr2,info))
- {
- if(ILNode_EvalConst(expr->expr1,info,&evalValue))
- {
- if((bitpos=IsPowOfTwo(evalValue))!=-1)
- {
- if(yyisa(node,ILNode_Mul))
- {
-
*parent=ILNode_Shl_create(expr->expr2,
-
ILNode_Int32_create(bitpos,0,0));
- }
- }
- else if(evalValue.un.i4Value==0)
- {
- if(yyisa(node,ILNode_Mul) ||
yyisa(node,ILNode_Div))
- {
-
*parent=ILNode_Int32_create(0,0,0);
- }
- }
- }
- else if(ILNode_EvalConst(expr->expr2,info,&evalValue))
- {
- if((bitpos=IsPowOfTwo(evalValue))!=-1)
- {
- /* FIXME: uncomment after adding check_range */
- /*
- if(yyisa(node,ILNode_Mul))
- {
-
*parent=ILNode_Shl_create(expr->expr1,
-
ILNode_Int32_create(bitpos,0,0));
- }*/
- }
- else if(evalValue.un.i4Value==0)
- {
- if(yyisa(node,ILNode_Mul))
- {
-
*parent=ILNode_Int32_create(0,0,0);
- }
- }
- }
- }
- /*
- * NOTE:
- * expr1 > expr2
- * Multiply: expr1 << value2, 0
- * Div: expr1 >> value 2
- */
- else if(ILNode_GetType(expr->expr1,info) >
-
ILNode_GetType(expr->expr2,info))
- {
- if(ILNode_EvalConst(expr->expr1,info,&evalValue))
- {
- if(evalValue.un.i4Value==0)
- {
- if(yyisa(node,ILNode_Mul) ||
yyisa(node,ILNode_Div))
- {
-
*parent=ILNode_Int32_create(0,0,0);
- }
- }
- }
- else if(ILNode_EvalConst(expr->expr2,info,&evalValue))
- {
- if((bitpos=IsPowOfTwo(evalValue))!=-1)
- {
- if(yyisa(node,ILNode_Mul))
- {
-
*parent=ILNode_Shl_create(expr->expr1,
-
ILNode_Int32_create(bitpos,0,0));
- }
- if(yyisa(node,ILNode_Div))
- {
-
*parent=ILNode_Shr_create(expr->expr1,
-
ILNode_Int32_create(bitpos,0,0));
- }
- }
- else if(evalValue.un.i4Value==0)
- {
- if(yyisa(node,ILNode_Mul))
- {
-
*parent=ILNode_Int32_create(0,0,0);
- }
- }
- }
- }
- /*
- * NOTE:
- * expr1 == expr2
- * Multiply: expr1 << value2, expr2 >> value1, 0
- * Div: expr1 >> value 2, expr2 << value1, 0
- */
- else
- {
- if(ILNode_EvalConst(expr->expr1,info,&evalValue))
- {
- if((bitpos=IsPowOfTwo(evalValue))!=-1)
- {
- if(yyisa(node,ILNode_Mul))
- {
-
*parent=ILNode_Shl_create(expr->expr2,
-
ILNode_Int32_create(bitpos,0,0));
- }
- }
- else if(evalValue.un.i4Value==0)
- {
- if(yyisa(node,ILNode_Mul) ||
yyisa(node,ILNode_Div))
- {
-
*parent=ILNode_Int32_create(0,0,0);
- }
- }
- }
- else if(ILNode_EvalConst(expr->expr2,info,&evalValue))
- {
- if((bitpos=IsPowOfTwo(evalValue))!=-1)
- {
- if(yyisa(node,ILNode_Mul))
- {
-
*parent=ILNode_Shl_create(expr->expr1,
-
ILNode_Int32_create(bitpos,0,0));
- }
- if(yyisa(node,ILNode_Div))
- {
-
*parent=ILNode_Shr_create(expr->expr1,
-
ILNode_Int32_create(bitpos,0,0));
- }
- }
- else if(evalValue.un.i4Value==0)
- {
- if(yyisa(node,ILNode_Mul) ||
yyisa(node,ILNode_Div))
- {
-
*parent=ILNode_Int32_create(0,0,0);
- }
- }
- }
- }
- }
- }
-
- /*
* Determine if a semantic value is zero. Used to support
* implicit coercions from zero to enumerated types.
--- 126,129 ----
***************
*** 422,426 ****
}
EvalOperator(info, *parent, parent, &value1);
- ReduceOperator(info,*parent,parent, &value1);
return value1;
}
--- 206,209 ----
***************
*** 474,478 ****
}
EvalOperator(info, *parent, parent, &value1);
- ReduceOperator(info,*parent,parent, &value1);
return value1;
}
--- 257,260 ----
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