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handle sp and rtoc as GPR aliases 

Co-Authored-By: mitaclaw <140017135+mitaclaw@users.noreply.github.com>
This commit is contained in:
VampireFlower 2024-06-03 22:14:40 -06:00
parent 46a89936ae
commit 8f03d9e8ca
1 changed files with 16 additions and 17 deletions
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33
Source/Core/Common/Assembler/GekkoLexer.cpp
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@ -4,6 +4,7 @@
#include "Common/Assembler/GekkoLexer.h"
#include "Common/Assert.h"
#include "Common/StringUtil.h"
#include <iterator>
#include <numeric>
@ -181,6 +182,11 @@ std::optional<T> EvalIntegral(TokenType tp, std::string_view val)
case TokenType::BinaryLit:
return std::accumulate(val.begin() + 2, val.end(), T{0}, bin_step);
case TokenType::GPR:
if (CaseInsensitiveEquals(val, "sp"))
return T{1};
if (CaseInsensitiveEquals(val, "rtoc"))
return T{2};
[[fallthrough]];
case TokenType::FPR:
return std::accumulate(val.begin() + 1, val.end(), T{0}, dec_step);
case TokenType::CRField:
@ -649,44 +655,37 @@ TokenType Lexer::ClassifyAlnum() const
return false;
};
constexpr auto eq_nocase = [](std::string_view str, std::string_view lwr) {
auto it_l = str.cbegin(), it_r = lwr.cbegin();
for (; it_l != str.cend() && it_r != lwr.cend(); it_l++, it_r++)
{
if (std::tolower(*it_l) != *it_r)
{
return false;
}
}
return it_l == str.end() && it_r == lwr.end();
};
if (std::tolower(alnum[0]) == 'r' && valid_regnum(alnum.substr(1)))
{
return TokenType::GPR;
}
else if ((CaseInsensitiveEquals(alnum, "sp")) || (CaseInsensitiveEquals(alnum, "rtoc")))
{
return TokenType::GPR;
}
else if (std::tolower(alnum[0]) == 'f' && valid_regnum(alnum.substr(1)))
{
return TokenType::FPR;
}
else if (alnum.length() == 3 && eq_nocase(alnum.substr(0, 2), "cr") && alnum[2] >= '0' &&
alnum[2] <= '7')
else if (alnum.length() == 3 && CaseInsensitiveEquals(alnum.substr(0, 2), "cr") &&
alnum[2] >= '0' && alnum[2] <= '7')
{
return TokenType::CRField;
}
else if (eq_nocase(alnum, "lt"))
else if (CaseInsensitiveEquals(alnum, "lt"))
{
return TokenType::Lt;
}
else if (eq_nocase(alnum, "gt"))
else if (CaseInsensitiveEquals(alnum, "gt"))
{
return TokenType::Gt;
}
else if (eq_nocase(alnum, "eq"))
else if (CaseInsensitiveEquals(alnum, "eq"))
{
return TokenType::Eq;
}
else if (eq_nocase(alnum, "so"))
else if (CaseInsensitiveEquals(alnum, "so"))
{
return TokenType::So;
}