41fd6e003c
This commit adds the half-precision (16-bit) floating-point configurations to the ARM AArch32 architectures. Enabling CONFIG_FP16 has the effect of specifying `-mfp16-format` option (in case of GCC) which allows using the half-precision floating point types such as `__fp16` and `_Float16`. Note that this configuration can be used regardless of whether a hardware FPU is available or supports half-precision operations. When an FP16-capable FPU is not available, the compiler will automatically provide the software emulations. Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
51 lines
1.6 KiB
CMake
51 lines
1.6 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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list(APPEND TOOLCHAIN_C_FLAGS -mcpu=${GCC_M_CPU})
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list(APPEND TOOLCHAIN_LD_FLAGS -mcpu=${GCC_M_CPU})
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if(CONFIG_COMPILER_ISA_THUMB2)
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list(APPEND TOOLCHAIN_C_FLAGS -mthumb)
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list(APPEND TOOLCHAIN_LD_FLAGS -mthumb)
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endif()
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list(APPEND TOOLCHAIN_C_FLAGS -mabi=aapcs)
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list(APPEND TOOLCHAIN_LD_FLAGS -mabi=aapcs)
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# Defines a mapping from GCC_M_CPU to FPU
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if(CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION)
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set(PRECISION_TOKEN)
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else()
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set(PRECISION_TOKEN sp-)
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endif()
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set(FPU_FOR_cortex-m4 fpv4-${PRECISION_TOKEN}d16)
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set(FPU_FOR_cortex-m7 fpv5-${PRECISION_TOKEN}d16)
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set(FPU_FOR_cortex-m33 fpv5-${PRECISION_TOKEN}d16)
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set(FPU_FOR_cortex-m33+nodsp fpv5-${PRECISION_TOKEN}d16)
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set(FPU_FOR_cortex-m55 auto)
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set(FPU_FOR_cortex-m55+nomve.fp auto)
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set(FPU_FOR_cortex-m55+nomve auto)
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set(FPU_FOR_cortex-m55+nodsp auto)
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if(CONFIG_FPU)
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list(APPEND TOOLCHAIN_C_FLAGS -mfpu=${FPU_FOR_${GCC_M_CPU}})
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list(APPEND TOOLCHAIN_LD_FLAGS -mfpu=${FPU_FOR_${GCC_M_CPU}})
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if (CONFIG_FP_SOFTABI)
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list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=softfp)
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list(APPEND TOOLCHAIN_LD_FLAGS -mfloat-abi=softfp)
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elseif(CONFIG_FP_HARDABI)
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list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=hard)
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list(APPEND TOOLCHAIN_LD_FLAGS -mfloat-abi=hard)
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endif()
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endif()
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if(CONFIG_FP16)
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if (CONFIG_FP16_IEEE)
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list(APPEND TOOLCHAIN_C_FLAGS -mfp16-format=ieee)
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list(APPEND TOOLCHAIN_LD_FLAGS -mfp16-format=ieee)
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elseif(CONFIG_FP16_ALT)
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list(APPEND TOOLCHAIN_C_FLAGS -mfp16-format=alternative)
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list(APPEND TOOLCHAIN_LD_FLAGS -mfp16-format=alternative)
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endif()
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endif()
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