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Implemented basic real arithmetic

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This commit is contained in:
Clifford Wolf 2014-06-14 08:51:22 +02:00
parent 9dd16fa41c
commit 442a8e2875
3 changed files with 51 additions and 6 deletions
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22
frontends/ast/simplify.cc
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@ -32,7 +32,7 @@
#include <sstream>
#include <stdarg.h>
#include <assert.h>
#include <math.h>
using namespace AST;
using namespace AST_INTERNAL;
@ -1433,10 +1433,22 @@ skip_dynamic_range_lvalue_expansion:;
if (0) { case AST_MUL: const_func = RTLIL::const_mul; }
if (0) { case AST_DIV: const_func = RTLIL::const_div; }
if (0) { case AST_MOD: const_func = RTLIL::const_mod; }
if (children[0]->type == AST_CONSTANT && children[1]->type == AST_CONSTANT) {
RTLIL::Const y = const_func(children[0]->bitsAsConst(width_hint, sign_hint),
children[1]->bitsAsConst(width_hint, sign_hint), sign_hint, sign_hint, width_hint);
newNode = mkconst_bits(y.bits, sign_hint);
if (children[0]->isConst() && children[1]->isConst()) {
if (children[0]->isConst() + children[1]->isConst() > 2) {
newNode = new AstNode(AST_REALVALUE);
switch (type) {
case AST_ADD: newNode->realvalue = children[0]->asReal(sign_hint) + children[1]->asReal(sign_hint); break;
case AST_SUB: newNode->realvalue = children[0]->asReal(sign_hint) - children[1]->asReal(sign_hint); break;
case AST_MUL: newNode->realvalue = children[0]->asReal(sign_hint) * children[1]->asReal(sign_hint); break;
case AST_DIV: newNode->realvalue = children[0]->asReal(sign_hint) / children[1]->asReal(sign_hint); break;
case AST_MOD: newNode->realvalue = fmod(children[0]->asReal(sign_hint), children[1]->asReal(sign_hint)); break;
default: log_abort();
}
} else {
RTLIL::Const y = const_func(children[0]->bitsAsConst(width_hint, sign_hint),
children[1]->bitsAsConst(width_hint, sign_hint), sign_hint, sign_hint, width_hint);
newNode = mkconst_bits(y.bits, sign_hint);
}
}
break;
if (0) { case AST_POS: const_func = RTLIL::const_pos; }