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zephyr/cmake/compiler/gcc/target_riscv.cmake

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RISCV compiler: Set mabi and march via Kconfig options The mabi and march options of the compiler and linker commands were previously hardcoded and depended only on the 64BIT config option. This update allows these flags to be set by the config options currently available, plus an additional option to specify the compressed ISA. Signed-off-by: Jaron Kelleher <jkelleher@fb.com>
2020-03-05 03:04:26 +08:00
# SPDX-License-Identifier: Apache-2.0
set(riscv_mabi "lp")
set(riscv_march "rv")
if(CONFIG_64BIT)
string(CONCAT riscv_mabi ${riscv_mabi} "64")
string(CONCAT riscv_march ${riscv_march} "64ima")
list(APPEND TOOLCHAIN_C_FLAGS -mcmodel=medany)
else()
string(CONCAT riscv_mabi "i" ${riscv_mabi} "32")
string(CONCAT riscv_march ${riscv_march} "32ima")
endif()
kconfig: Rename CONFIG_FLOAT to CONFIG_FPU This commit renames the Kconfig `FLOAT` symbol to `FPU`, since this symbol only indicates that the hardware Floating Point Unit (FPU) is used and does not imply and/or indicate the general availability of toolchain-level floating point support (i.e. this symbol is not selected when building for an FPU-less platform that supports floating point operations through the toolchain-provided software floating point library). Moreover, given that the symbol that indicates the availability of FPU is named `CPU_HAS_FPU`, it only makes sense to use "FPU" in the name of the symbol that enables the FPU. Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
2020-04-23 16:27:24 +08:00
if(CONFIG_FPU)
kconfig: Make the CPU_HAS_FPU_DOUBLE_PRECISION option global. This option now applies to the RISC-V architecture and is no longer a ARM only configuration. Signed-off-by: Corey Wharton <coreyw7@fb.com>
2020-04-15 02:06:23 +08:00
if(CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION)
if(CONFIG_FLOAT_HARD)
string(CONCAT riscv_mabi ${riscv_mabi} "d")
endif()
string(CONCAT riscv_march ${riscv_march} "fd")
else()
if(CONFIG_FLOAT_HARD)
string(CONCAT riscv_mabi ${riscv_mabi} "f")
endif()
string(CONCAT riscv_march ${riscv_march} "f")
riscv: Set mabi and march flags for floating point Adds handling of the FLOAT_64BIT option when determining the ISA flags as well as introduces a new Kconfig option to enable/disable the hard-float calling convention. Signed-off-by: Corey Wharton <coreyw7@fb.com>
2020-04-08 06:24:36 +08:00
endif()
RISCV compiler: Set mabi and march via Kconfig options The mabi and march options of the compiler and linker commands were previously hardcoded and depended only on the 64BIT config option. This update allows these flags to be set by the config options currently available, plus an additional option to specify the compressed ISA. Signed-off-by: Jaron Kelleher <jkelleher@fb.com>
2020-03-05 03:04:26 +08:00
endif()
if(CONFIG_COMPRESSED_ISA)
string(CONCAT riscv_march ${riscv_march} "c")
endif()
list(APPEND TOOLCHAIN_C_FLAGS -mabi=${riscv_mabi} -march=${riscv_march})
list(APPEND TOOLCHAIN_LD_FLAGS -mabi=${riscv_mabi} -march=${riscv_march})