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author | David Marcec <dmarcecguzman@gmail.com> | 2020-05-30 02:55:27 +0200 |
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committer | David Marcec <dmarcecguzman@gmail.com> | 2020-05-30 02:55:27 +0200 |
commit | d0bdd26c26b72004144e656c9abc6232b80f3f60 (patch) | |
tree | 8349fdcf0167f5ee4534aa3a679fc872d4d604f1 /src/common/x64/xbyak_util.h | |
parent | Merge pull request #4007 from ReinUsesLisp/reduce-logs (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/common/x64/xbyak_util.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/common/x64/xbyak_util.h b/src/common/x64/xbyak_util.h new file mode 100644 index 000000000..df17f8cbe --- /dev/null +++ b/src/common/x64/xbyak_util.h @@ -0,0 +1,47 @@ +// Copyright 2016 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <type_traits> +#include <xbyak.h> +#include "common/x64/xbyak_abi.h" + +namespace Common::X64 { + +// Constants for use with cmpps/cmpss +enum { + CMP_EQ = 0, + CMP_LT = 1, + CMP_LE = 2, + CMP_UNORD = 3, + CMP_NEQ = 4, + CMP_NLT = 5, + CMP_NLE = 6, + CMP_ORD = 7, +}; + +constexpr bool IsWithin2G(uintptr_t ref, uintptr_t target) { + const u64 distance = target - (ref + 5); + return !(distance >= 0x8000'0000ULL && distance <= ~0x8000'0000ULL); +} + +inline bool IsWithin2G(const Xbyak::CodeGenerator& code, uintptr_t target) { + return IsWithin2G(reinterpret_cast<uintptr_t>(code.getCurr()), target); +} + +template <typename T> +inline void CallFarFunction(Xbyak::CodeGenerator& code, const T f) { + static_assert(std::is_pointer_v<T>, "Argument must be a (function) pointer."); + size_t addr = reinterpret_cast<size_t>(f); + if (IsWithin2G(code, addr)) { + code.call(f); + } else { + // ABI_RETURN is a safe temp register to use before a call + code.mov(ABI_RETURN, addr); + code.call(ABI_RETURN); + } +} + +} // namespace Common::X64 |