diff --git a/compiler-rt/cmake/Modules/CompilerRTUtils.cmake b/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
--- a/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
+++ b/compiler-rt/cmake/Modules/CompilerRTUtils.cmake
@@ -158,6 +158,7 @@
   check_symbol_exists(__i386__ "" __I386)
   check_symbol_exists(__mips__ "" __MIPS)
   check_symbol_exists(__mips64__ "" __MIPS64)
+  check_symbol_exists(__powerpc__ "" __PPC)
   check_symbol_exists(__powerpc64__ "" __PPC64)
   check_symbol_exists(__powerpc64le__ "" __PPC64LE)
   check_symbol_exists(__riscv "" __RISCV)
@@ -179,10 +180,12 @@
     add_default_target_arch(mips64)
   elseif(__MIPS)
     add_default_target_arch(mips)
-  elseif(__PPC64)
+  elseif(__PPC64) # must be checked before __PPC
     add_default_target_arch(powerpc64)
   elseif(__PPC64LE)
     add_default_target_arch(powerpc64le)
+  elseif(__PPC)
+    add_default_target_arch(powerpc)
   elseif(__RISCV)
     if(CMAKE_SIZEOF_VOID_P EQUAL "4")
       add_default_target_arch(riscv32)
diff --git a/compiler-rt/cmake/base-config-ix.cmake b/compiler-rt/cmake/base-config-ix.cmake
--- a/compiler-rt/cmake/base-config-ix.cmake
+++ b/compiler-rt/cmake/base-config-ix.cmake
@@ -197,7 +197,10 @@
       cmake_pop_check_state()
 
       if(HOST_IS_BIG_ENDIAN)
-        test_target_arch(powerpc64 "" "-m64")
+        if(CMAKE_SYSTEM_NAME MATCHES "AIX")
+          test_target_arch(powerpc "" "-m32")
+        endif()
+          test_target_arch(powerpc64 "" "-m64")
       else()
         test_target_arch(powerpc64le "" "-m64")
       endif()
diff --git a/compiler-rt/cmake/builtin-config-ix.cmake b/compiler-rt/cmake/builtin-config-ix.cmake
--- a/compiler-rt/cmake/builtin-config-ix.cmake
+++ b/compiler-rt/cmake/builtin-config-ix.cmake
@@ -30,6 +30,7 @@
 set(X86_64 x86_64)
 set(MIPS32 mips mipsel)
 set(MIPS64 mips64 mips64el)
+set(PPC32 powerpc)
 set(PPC64 powerpc64 powerpc64le)
 set(RISCV32 riscv32)
 set(RISCV64 riscv64)
@@ -47,7 +48,7 @@
 
 set(ALL_BUILTIN_SUPPORTED_ARCH
   ${X86} ${X86_64} ${ARM32} ${ARM64}
-  ${HEXAGON} ${MIPS32} ${MIPS64} ${PPC64}
+  ${HEXAGON} ${MIPS32} ${MIPS64} ${PPC32} ${PPC64}
   ${RISCV32} ${RISCV64} ${SPARC} ${SPARCV9}
   ${WASM32} ${WASM64} ${VE})
 
diff --git a/compiler-rt/lib/builtins/CMakeLists.txt b/compiler-rt/lib/builtins/CMakeLists.txt
--- a/compiler-rt/lib/builtins/CMakeLists.txt
+++ b/compiler-rt/lib/builtins/CMakeLists.txt
@@ -561,6 +561,8 @@
 set(mips64el_SOURCES ${GENERIC_TF_SOURCES}
                      ${mips_SOURCES})
 
+set(powerpc_SOURCES ${GENERIC_SOURCES})
+
 set(powerpc64_SOURCES
   ppc/divtc3.c
   ppc/fixtfdi.c