[libc-commits] [libc] 096f9d0 - [libc] Initial support so that libc-shared-tests can be built with pp64le (#188882)

[via libc-commits]

Author: lntue
Date: 2026-04-01T20:55:44-04:00
New Revision: 096f9d0aa8edb8bad77e8061a6aa9cbf61bcb5ac

URL: https://github.com/llvm/llvm-project/commit/096f9d0aa8edb8bad77e8061a6aa9cbf61bcb5ac
DIFF: https://github.com/llvm/llvm-project/commit/096f9d0aa8edb8bad77e8061a6aa9cbf61bcb5ac.diff

LOG: [libc] Initial support so that libc-shared-tests can be built with pp64le (#188882)

Added: 
    libc/config/linux/power/config.json
    libc/config/linux/power/entrypoints.txt
    libc/config/linux/power/headers.txt

Modified: 
    libc/cmake/modules/LLVMLibCArchitectures.cmake
    libc/src/__support/FPUtil/generic/sqrt.h

Removed: 
    


################################################################################
diff  --git a/libc/cmake/modules/LLVMLibCArchitectures.cmake b/libc/cmake/modules/LLVMLibCArchitectures.cmake
index b24ea353df484..921057706c5e9 100644
--- a/libc/cmake/modules/LLVMLibCArchitectures.cmake
+++ b/libc/cmake/modules/LLVMLibCArchitectures.cmake
@@ -184,6 +184,8 @@ elseif(LIBC_TARGET_ARCHITECTURE STREQUAL "nvptx")
   set(LIBC_TARGET_ARCHITECTURE_IS_NVPTX TRUE)
 elseif(LIBC_TARGET_ARCHITECTURE STREQUAL "spirv")
   set(LIBC_TARGET_ARCHITECTURE_IS_SPIRV TRUE)
+elseif(LIBC_TARGET_ARCHITECTURE STREQUAL "power")
+  set(LIBC_TARGET_ARCHITECTURE_IS_POWERPC TRUE)
 else()
   message(FATAL_ERROR
           "Unsupported libc target architecture ${LIBC_TARGET_ARCHITECTURE}")

diff  --git a/libc/config/linux/power/config.json b/libc/config/linux/power/config.json
new file mode 100644
index 0000000000000..22e47df31bb6e
--- /dev/null
+++ b/libc/config/linux/power/config.json
@@ -0,0 +1,7 @@
+{
+  "string": {
+    "LIBC_CONF_STRING_LENGTH_IMPL": {
+      "value": "element"
+    }
+  }
+}

diff  --git a/libc/config/linux/power/entrypoints.txt b/libc/config/linux/power/entrypoints.txt
new file mode 100644
index 0000000000000..f133d4f0d20cf
--- /dev/null
+++ b/libc/config/linux/power/entrypoints.txt
@@ -0,0 +1,14 @@
+
+set(TARGET_LIBC_ENTRYPOINTS
+  libc.src.errno.errno
+)
+
+set(TARGET_LIBM_ENTRYPOINTS)
+
+set(TARGET_LIBMVEC_ENTRYPOINTS)
+
+set(TARGET_LLVMLIBC_ENTRYPOINTS
+  ${TARGET_LIBC_ENTRYPOINTS}
+  ${TARGET_LIBM_ENTRYPOINTS}
+  ${TARGET_LIBMVEC_ENTRYPOINTS}
+)

diff  --git a/libc/config/linux/power/headers.txt b/libc/config/linux/power/headers.txt
new file mode 100644
index 0000000000000..8b96869309bfa
--- /dev/null
+++ b/libc/config/linux/power/headers.txt
@@ -0,0 +1 @@
+set(TARGET_PUBLIC_HEADERS)

diff  --git a/libc/src/__support/FPUtil/generic/sqrt.h b/libc/src/__support/FPUtil/generic/sqrt.h
index 2295fdf85a114..4e452a87050b1 100644
--- a/libc/src/__support/FPUtil/generic/sqrt.h
+++ b/libc/src/__support/FPUtil/generic/sqrt.h
@@ -9,7 +9,6 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_SQRT_H
 #define LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_SQRT_H
 
-#include "sqrt_80_bit_long_double.h"
 #include "src/__support/CPP/bit.h" // countl_zero
 #include "src/__support/CPP/type_traits.h"
 #include "src/__support/FPUtil/FEnvImpl.h"
@@ -22,6 +21,10 @@
 
 #include "hdr/fenv_macros.h"
 
+#ifdef LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80
+#include "sqrt_80_bit_long_double.h"
+#endif // !LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80
+
 namespace LIBC_NAMESPACE_DECL {
 namespace fputil {
 
@@ -52,7 +55,7 @@ template <>
 LIBC_INLINE void normalize<long double>(int &exponent, uint64_t &mantissa) {
   normalize<double>(exponent, mantissa);
 }
-#elif !defined(LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80)
+#elif defined(LIBC_TYPES_LONG_DOUBLE_IS_FLOAT128)
 template <>
 LIBC_INLINE void normalize<long double>(int &exponent, UInt128 &mantissa) {
   const uint64_t hi_bits = static_cast<uint64_t>(mantissa >> 64);
@@ -76,8 +79,10 @@ LIBC_INLINE static constexpr cpp::enable_if_t<
 sqrt(InType x) {
   if constexpr (internal::SpecialLongDouble<OutType>::VALUE &&
                 internal::SpecialLongDouble<InType>::VALUE) {
+#ifdef LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80
     // Special 80-bit long double.
     return x86::sqrt(x);
+#endif // !LIBC_TYPES_LONG_DOUBLE_IS_X86_FLOAT80
   } else {
     // IEEE floating points formats.
     using OutFPBits = FPBits<OutType>;