This patch adds Kconfig entries for the F (Single-Precision)
and D (Double-Precision) floating point instruction-set extensions.
Signed-off-by: Eric Lin <tesh...@andestech.com>
---
Changes for v2:
- Grammatical correction in commit message "adds"
- Fixed the config name to indicate both F and D
arch/riscv/Kconfig | 7 +++++++
arch/riscv/Makefile | 12 ++++++++----
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 362f3cdc65..e7a76c67cc 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -91,6 +91,13 @@ config RISCV_ISA_C
when building U-Boot, which results in compressed instructions in the
U-Boot binary.
+config RISCV_ISA_FD
+ bool "Emit Floating-point instructions"
+ help
+ Adds "F" and "D" to the ISA subsets that the toolchain is allowed to
emit
+ when building U-Boot, which results in Single and Double-precision
instructions
+ in the U-Boot binary.
+
config RISCV_ISA_A
def_bool y
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 0b80eb8d86..5a5c8e75f0 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -5,15 +5,19 @@
ifeq ($(CONFIG_ARCH_RV64I),y)
ARCH_BASE = rv64im
- ABI = lp64
+ ABI := lp64
endif
ifeq ($(CONFIG_ARCH_RV32I),y)
ARCH_BASE = rv32im
- ABI = ilp32
+ ABI := ilp32
endif
ifeq ($(CONFIG_RISCV_ISA_A),y)
ARCH_A = a
endif
+ifeq ($(CONFIG_RISCV_ISA_FD),y)
+ ARCH_FD = fd
+ ABI := $(ABI)d
+endif
ifeq ($(CONFIG_RISCV_ISA_C),y)
ARCH_C = c
endif
@@ -24,8 +28,8 @@ ifeq ($(CONFIG_CMODEL_MEDANY),y)
CMODEL = medany
endif
-ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) \
- -mcmodel=$(CMODEL)
+ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_FD)$(ARCH_C) -mabi=$(ABI) \
+ -mcmodel=$(CMODEL)
PLATFORM_CPPFLAGS += $(ARCH_FLAGS)
CFLAGS_EFI += $(ARCH_FLAGS)
--
2.17.0
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