message: optimize config.m4
diff: @@ -754,9 +754,9 @@ EOF
  [amd64*], [SW_CPU="x86_64"],
  [x86*], [SW_CPU="x86"],
  [i?86*], [SW_CPU="x86"],
  - [arm*], [SW_CPU="arm"],
  - [aarch64*], [SW_CPU="arm64"],
  [arm64*], [SW_CPU="arm64"],
  + [aarch64*], [SW_CPU="arm64"],
  + [arm*], [SW_CPU="arm32"],
  [mips64*], [SW_CPU="mips64"],
  [mips*], [SW_CPU="mips32"],
  [riscv64*], [SW_CPU="riscv64"],
  @@ -779,7 +779,7 @@ EOF
  else
  SW_USE_ASM_CONTEXT="no"
  fi
  - elif test "$SW_CPU" = "arm"; then
  + elif test "$SW_CPU" = "arm32"; then
  if test "$SW_OS" = "LINUX" || test "$SW_OS" = "BSD"; then
  SW_CONTEXT_ASM_FILE="arm_aapcs_elf_gas.S"
  else
  