9f652ea04a
The commit f10fa0dea8 mapped the
Cortex-R52 processor type to use the "VFPv3" FPU type, but the
toolchain requires the "FPv5" FPU type and refuses to assemble
floating-point instructions when the "VFPv3" FPU type is specified.
This commit updates the build script to specify the FPU type of
`fpv5-sp-d16` when the processor is configured with a single-precision
FPU, and `neon-fp-armv8` when the processor is configured with a
double-precision + Advanced SIMD-capable FPU.
Note that the `fp-armv8` FPU type is an alias for double-precision FPv5
with 32 double-precision registers (refer to the GCC
`gcc/config/arm/arm-cpus.in` for more details); NEON is always
specified in case of a double-precision configuration because the
Cortex-R52 can only be configured as such.
Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
48 lines
1.5 KiB
CMake
48 lines
1.5 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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# Determines what argument to give to -mfpu= based on the
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# KConfig'uration and sets this to GCC_M_FPU
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if(CONFIG_FPU)
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if("${ARCH}" STREQUAL "arm")
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if(CONFIG_CPU_AARCH32_CORTEX_R)
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if(CONFIG_CPU_CORTEX_R4 OR CONFIG_CPU_CORTEX_R5) # VFPv3
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if(CONFIG_VFP_FEATURE_DOUBLE_PRECISION)
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set(GCC_M_FPU vfpv3-d16)
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elseif(CONFIG_VFP_FEATURE_SINGLE_PRECISION)
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set(GCC_M_FPU vfpv3xd)
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endif()
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if(CONFIG_VFP_FEATURE_HALF_PRECISION)
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set(GCC_M_FPU ${GCC_M_FPU}-fp16)
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endif()
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elseif(CONFIG_CPU_CORTEX_R52)
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if(CONFIG_VFP_FEATURE_DOUBLE_PRECISION)
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set(GCC_M_FPU neon-fp-armv8)
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elseif(CONFIG_VFP_FEATURE_SINGLE_PRECISION)
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set(GCC_M_FPU fpv5-sp-d16)
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endif()
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endif()
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elseif(CONFIG_CPU_CORTEX_M)
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# Defines a mapping from GCC_M_CPU to FPU
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if(CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION)
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set(PRECISION_TOKEN)
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else()
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set(PRECISION_TOKEN sp-)
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endif()
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set(FPU_FOR_cortex-m4 fpv4-${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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set(GCC_M_FPU ${FPU_FOR_${GCC_M_CPU}})
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endif()
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endif()
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endif() #CONFIG_FPU
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