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Reduce instruction set baseline to just x86-64 (GCC, Linux only) #1978

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Merged
nullsystem merged 1 commit into from
Jun 3, 2026
Merged

Reduce instruction set baseline to just x86-64 (GCC, Linux only) #1978

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14 changes: 8 additions & 6 deletions src/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -120,9 +120,9 @@ elseif(CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "RelWith
endif()

add_compile_definitions(
# Whether to validate narrowing conversions done with narrow_cast<T>(...)
# If not, will simply alias narrow_cast to static_cast
$<$<CONFIG:Debug>:PARANOID_NARROWING>
# Whether to validate narrowing conversions done with narrow_cast<T>(...)
# If not, will simply alias narrow_cast to static_cast
$<$<CONFIG:Debug>:PARANOID_NARROWING>
)

if(NEO_RAD_TELEMETRY_DISABLED)
Expand Down Expand Up @@ -299,9 +299,11 @@ if(OS_LINUX OR OS_MACOS)
add_compile_options(
# See: https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html

# core2 - Intel Core 2 CPU with 64-bit extensions, MMX, SSE, SSE2, SSE3, SSSE3, CX16, SAHF and FXSR instruction set support.
-march=core2
#-march=x86-64
# Baseline any x86_64 CPU (MMX, SSE, SSE2, and FXSR instruction set support)
-march=x86-64

# Optimize for the most common AMD64 processors, doesn't cut out support unlike -march
-mtune=generic

# This option enables GCC to generate CMPXCHG16B instructions in 64-bit code to implement compare-and-exchange
# operations on 16-byte aligned 128-bit objects. This is useful for atomic updates of data structures exceeding
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