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riscv: Set mabi and march flags for floating point

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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>
This commit is contained in:
Corey Wharton 2020-04-07 15:24:36 -07:00 • committed by Andrew Boie
commit 22c52846a5
2 changed files with 17 additions and 1 deletions
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8
arch/riscv/Kconfig
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@ -13,6 +13,14 @@ config COMPRESSED_ISA
bool
default y if 64BIT
config FLOAT_HARD
bool "Enable hard-float calling convention"
default y
depends on FLOAT
select COMPRESSED_ISA
help
This option enables the hard-float calling convention.
menu "RISCV Processor Options"
config INCLUDE_RESET_VECTOR

10
cmake/compiler/gcc/target_riscv.cmake
View file

@ -12,7 +12,15 @@ else()
string(CONCAT riscv_march ${riscv_march} "32ima")
endif()
if(CONFIG_FLOAT)
if(CONFIG_FLOAT_64BIT)
if(CONFIG_FLOAT_HARD)
string(CONCAT riscv_mabi ${riscv_mabi} "d")
endif()
string(CONCAT riscv_march ${riscv_march} "fd")
elseif(CONFIG_FLOAT)
if(CONFIG_FLOAT_HARD)
string(CONCAT riscv_mabi ${riscv_mabi} "f")
endif()
string(CONCAT riscv_march ${riscv_march} "f")
endif()