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[compiler-rt][ARM] Optimized f32 add/subtract for Armv6-M. #154093

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[compiler-rt][ARM] Optimized f32 add/subtract for Armv6-M. #154093

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7698c15
[compiler-rt][ARM] Optimized f32 add/subtract for Armv6-M.
statham-arm Aug 15, 2025
7f88246
clang-format
statham-arm Aug 18, 2025
f4447a1
Add comments in fnan2
statham-arm Aug 18, 2025
9e31425
Rename __fnan2 to mention compiler-rt
statham-arm Aug 18, 2025
73e7571
Lowercase instruction mnemonics
statham-arm Oct 2, 2025
a6f6263
Changes to fnan2 to be consistent wih #161546
statham-arm Oct 2, 2025
fd77ee9
Conditionalize NaN-handling parts of tests
statham-arm Oct 7, 2025
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12 changes: 8 additions & 4 deletions compiler-rt/cmake/Modules/CompilerRTUtils.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -452,10 +452,14 @@ function(filter_builtin_sources inout_var name)
# and ensure that it is removed from the file list.
get_filename_component(_name ${_file} NAME)
string(REGEX REPLACE "\\.S$" ".c" _cname "${_name}")
if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${_cname}")
message(STATUS "For ${name} builtins preferring ${_file} to ${_cname}")
list(REMOVE_ITEM intermediate ${_cname})
endif()
get_property(_cnames SOURCE ${_file} PROPERTY crt_supersedes)
set(_cnames ${_cname} ${_cnames})
foreach(_cname ${_cnames})
if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${_cname}")
message(STATUS "For ${name} builtins preferring ${_file} to ${_cname}")
list(REMOVE_ITEM intermediate ${_cname})
endif()
endforeach()
endif()
endforeach()
set(${inout_var} ${intermediate} PARENT_SCOPE)
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3 changes: 3 additions & 0 deletions compiler-rt/lib/builtins/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -452,8 +452,11 @@ set(thumb1_base_SOURCES
arm/udivsi3.S
arm/comparesf2.S
arm/addsf3.S
arm/fnan2.c
${GENERIC_SOURCES}
)
# arm/addsf3.S implements both addition and subtraction via cross-branching
set_property(SOURCE arm/addsf3.S PROPERTY crt_supersedes subsf3.c)

set(arm_EABI_RT_SOURCES
arm/aeabi_cdcmp.S
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