本文整理汇总了C++中IString::isNull方法的典型用法代码示例。如果您正苦于以下问题：C++ IString::isNull方法的具体用法？C++ IString::isNull怎么用？C++ IString::isNull使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IString的用法示例。
在下文中一共展示了IString::isNull方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: makeAsmCoercedZero
Ref makeAsmCoercedZero(AsmType type) {
switch (type) {
case ASM_INT: return ValueBuilder::makeNum(0); break;
case ASM_DOUBLE: return ValueBuilder::makeUnary(PLUS, ValueBuilder::makeNum(0)); break;
case ASM_FLOAT: {
if (!ASM_FLOAT_ZERO.isNull()) {
return ValueBuilder::makeName(ASM_FLOAT_ZERO);
} else {
return ValueBuilder::makeCall(MATH_FROUND, ValueBuilder::makeNum(0));
}
break;
}
case ASM_FLOAT32X4: {
return ValueBuilder::makeCall(SIMD_FLOAT32X4, ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0));
break;
}
case ASM_FLOAT64X2: {
return ValueBuilder::makeCall(SIMD_FLOAT64X2, ValueBuilder::makeNum(0), ValueBuilder::makeNum(0));
break;
}
case ASM_INT8X16: {
return ValueBuilder::makeCall(SIMD_INT8X16, ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0));
break;
}
case ASM_INT16X8: {
return ValueBuilder::makeCall(SIMD_INT16X8, ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0));
break;
}
case ASM_INT32X4: {
return ValueBuilder::makeCall(SIMD_INT32X4, ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0), ValueBuilder::makeNum(0));
break;
}
default: assert(0);
}
abort();
}示例2: detectType
AsmType detectType(Ref node, AsmData *asmData, bool inVarDef, IString minifiedFround) {
switch (node[0]->getCString()[0]) {
case 'n': {
if (node[0] == NUM) {
if (!isInteger(node[1]->getNumber())) return ASM_DOUBLE;
return ASM_INT;
} else if (node[0] == NAME) {
if (asmData) {
AsmType ret = asmData->getType(node[1]->getCString());
if (ret != ASM_NONE) return ret;
}
if (!inVarDef) {
if (node[1] == INF || node[1] == NaN) return ASM_DOUBLE;
if (node[1] == TEMP_RET0) return ASM_INT;
return ASM_NONE;
}
// We are in a variable definition, where Math_fround(0) optimized into a global constant becomes f0 = Math_fround(0)
if (ASM_FLOAT_ZERO.isNull()) ASM_FLOAT_ZERO = node[1]->getIString();
else assert(node[1] == ASM_FLOAT_ZERO);
return ASM_FLOAT;
}
break;
}
case 'u': {
if (node[0] == UNARY_PREFIX) {
switch (node[1]->getCString()[0]) {
case '+': return ASM_DOUBLE;
case '-': return detectType(node[2], asmData, inVarDef, minifiedFround);
case '!': case '~': return ASM_INT;
}
break;
}
break;
}
case 'c': {
if (node[0] == CALL) {
if (node[1][0] == NAME) {
IString name = node[1][1]->getIString();
if (name == MATH_FROUND || name == minifiedFround) return ASM_FLOAT;
else if (name == SIMD_FLOAT32X4 || name == SIMD_FLOAT32X4_CHECK) return ASM_FLOAT32X4;
else if (name == SIMD_FLOAT64X2 || name == SIMD_FLOAT64X2_CHECK) return ASM_FLOAT64X2;
else if (name == SIMD_INT8X16 || name == SIMD_INT8X16_CHECK) return ASM_INT8X16;
else if (name == SIMD_INT16X8 || name == SIMD_INT16X8_CHECK) return ASM_INT16X8;
else if (name == SIMD_INT32X4 || name == SIMD_INT32X4_CHECK) return ASM_INT32X4;
}
return ASM_NONE;
} else if (node[0] == CONDITIONAL) {
return detectType(node[2], asmData, inVarDef, minifiedFround);
}
break;
}
case 'b': {
if (node[0] == BINARY) {
switch (node[1]->getCString()[0]) {
case '+': case '-':
case '*': case '/': case '%': return detectType(node[2], asmData, inVarDef, minifiedFround);
case '|': case '&': case '^': case '<': case '>': // handles <<, >>, >>=, <=, >=
case '=': case '!': { // handles ==, !=
return ASM_INT;
}
}
}
break;
}
case 's': {
if (node[0] == SEQ) {
return detectType(node[2], asmData, inVarDef, minifiedFround);
} else if (node[0] == SUB) {
assert(node[1][0] == NAME);
HeapInfo info = parseHeap(node[1][1]->getCString());
if (info.valid) return ASM_NONE;
return info.floaty ? ASM_DOUBLE : ASM_INT; // XXX ASM_FLOAT?
}
break;
}
}
//dump("horrible", node);
//assert(0);
return ASM_NONE;
}