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Enable _itScanForward64 for ARM64 MSVC target (#23220)

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This commit is contained in:
Michał Janiszewski
2024-11-17 21:39:03 +01:00
committed by GitHub
parent 4a78062f54
commit 1a93c9855a
1 changed files with 3 additions and 3 deletions
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6
src/openrct2/core/Numerics.hpp
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@@ -30,7 +30,7 @@ namespace OpenRCT2::Numerics
int32_t success = __builtin_ffs(source); int32_t success = __builtin_ffs(source);
return success - 1; return success - 1;
#else #else
# pragma message("Falling back to iterative bitscan forward, consider using intrinsics") # pragma message("Falling back to iterative bitscan32 forward, consider using intrinsics")
// This is a low-hanging optimisation boost, check if your compiler offers // This is a low-hanging optimisation boost, check if your compiler offers
// any intrinsic. // any intrinsic.
// cf. https://github.com/OpenRCT2/OpenRCT2/pull/2093 // cf. https://github.com/OpenRCT2/OpenRCT2/pull/2093
@@ -44,7 +44,7 @@ namespace OpenRCT2::Numerics
inline int64_t bitScanForward(uint64_t source) inline int64_t bitScanForward(uint64_t source)
{ {
#if defined(_MSC_VER) && (_MSC_VER >= 1400) && defined(_M_X64) // Visual Studio 2005 #if defined(_MSC_VER) && (_MSC_VER >= 1400) && (defined(_M_X64) || defined(_M_ARM64)) // Visual Studio 2005
unsigned long i; unsigned long i;
uint8_t success = _BitScanForward64(&i, source); uint8_t success = _BitScanForward64(&i, source);
return success != 0 ? i : -1; return success != 0 ? i : -1;
@@ -52,7 +52,7 @@ namespace OpenRCT2::Numerics
int32_t success = __builtin_ffsll(source); int32_t success = __builtin_ffsll(source);
return success - 1; return success - 1;
#else #else
# pragma message("Falling back to iterative bitscan forward, consider using intrinsics") # pragma message("Falling back to iterative bitscan64 forward, consider using intrinsics")
// This is a low-hanging optimisation boost, check if your compiler offers // This is a low-hanging optimisation boost, check if your compiler offers
// any intrinsic. // any intrinsic.
// cf. https://github.com/OpenRCT2/OpenRCT2/pull/2093 // cf. https://github.com/OpenRCT2/OpenRCT2/pull/2093