cmake/compiler/gcc/target_arm.cmake

# SPDX-License-Identifier: Apache-2.0
list(APPEND TOOLCHAIN_C_FLAGS   -mcpu=${GCC_M_CPU})
list(APPEND TOOLCHAIN_LD_FLAGS  -mcpu=${GCC_M_CPU})

if(CONFIG_COMPILER_ISA_THUMB2)
  list(APPEND TOOLCHAIN_C_FLAGS   -mthumb)
  list(APPEND TOOLCHAIN_LD_FLAGS  -mthumb)
endif()

list(APPEND TOOLCHAIN_C_FLAGS -mabi=aapcs)
list(APPEND TOOLCHAIN_LD_FLAGS -mabi=aapcs)

# Defines a mapping from GCC_M_CPU to FPU

if(CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION)
  set(PRECISION_TOKEN)
else()
  set(PRECISION_TOKEN sp-)
endif()

set(FPU_FOR_cortex-m4           fpv4-${PRECISION_TOKEN}d16)
set(FPU_FOR_cortex-m7           fpv5-${PRECISION_TOKEN}d16)
set(FPU_FOR_cortex-m33          fpv5-${PRECISION_TOKEN}d16)
set(FPU_FOR_cortex-m33+nodsp    fpv5-${PRECISION_TOKEN}d16)
set(FPU_FOR_cortex-m55          auto)
set(FPU_FOR_cortex-m55+nomve.fp auto)
set(FPU_FOR_cortex-m55+nomve    auto)
set(FPU_FOR_cortex-m55+nodsp    auto)

if(CONFIG_FPU)
  list(APPEND TOOLCHAIN_C_FLAGS   -mfpu=${FPU_FOR_${GCC_M_CPU}})
  list(APPEND TOOLCHAIN_LD_FLAGS  -mfpu=${FPU_FOR_${GCC_M_CPU}})
  if    (CONFIG_FP_SOFTABI)
    list(APPEND TOOLCHAIN_C_FLAGS   -mfloat-abi=softfp)
    list(APPEND TOOLCHAIN_LD_FLAGS  -mfloat-abi=softfp)
  elseif(CONFIG_FP_HARDABI)
    list(APPEND TOOLCHAIN_C_FLAGS   -mfloat-abi=hard)
    list(APPEND TOOLCHAIN_LD_FLAGS  -mfloat-abi=hard)
  endif()
endif()

if(CONFIG_FP16)
  if    (CONFIG_FP16_IEEE)
    list(APPEND TOOLCHAIN_C_FLAGS   -mfp16-format=ieee)
    list(APPEND TOOLCHAIN_LD_FLAGS  -mfp16-format=ieee)
  elseif(CONFIG_FP16_ALT)
    list(APPEND TOOLCHAIN_C_FLAGS   -mfp16-format=alternative)
    list(APPEND TOOLCHAIN_LD_FLAGS  -mfp16-format=alternative)
  endif()
endif()