no1wudi commented on a change in pull request #5662:
URL: https://github.com/apache/incubator-nuttx/pull/5662#discussion_r818411841
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File path: arch/arm/src/armv7-a/Toolchain.defs
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@@ -56,21 +56,51 @@ endif
#
ifeq ($(CONFIG_ARM_THUMB),y)
-ARCHCPUFLAGS += -mthumb
-endif
-
-ifeq ($(CONFIG_ARCH_FPU),y)
-ARCHCPUFLAGS += -mfloat-abi=hard
+ ARCHCPUFLAGS += -mthumb
endif
ifeq ($(CONFIG_ARCH_CORTEXA5),y)
-ARCHCPUFLAGS += -mcpu=cortex-a5
+ ARCHCPUFLAGS += -mcpu=cortex-a5
else ifeq ($(CONFIG_ARCH_CORTEXA7),y)
-ARCHCPUFLAGS += -mcpu=cortex-a7
+ ARCHCPUFLAGS += -mcpu=cortex-a7
else ifeq ($(CONFIG_ARCH_CORTEXA8),y)
-ARCHCPUFLAGS += -mcpu=cortex-a8
+ ARCHCPUFLAGS += -mcpu=cortex-a8
else ifeq ($(CONFIG_ARCH_CORTEXA9),y)
-ARCHCPUFLAGS += -mcpu=cortex-a9
+ ARCHCPUFLAGS += -mcpu=cortex-a9
+endif
+
+ifneq ($(CONFIG_ARM_HAVE_FPU_D32),y)
+ ARCHFPUD32FLAGS = -d16
+endif
+
+ifeq ($(CONFIG_ARM_FP_NEON),y)
+ ARCHNEONFLAGS = neon-
+ ifneq ($(CONFIG_ARM_HAVE_FPU_D32),y)
+ $(error "Number of FPU is alwasys 32 with NEON enabled, please check
Kconfig of your SoC.")
+ endif
+endif
+
+ifeq ($(CONFIG_ARCH_FPU),y)
+ ifeq ($(CONFIG_ARM_FPU_ABI_SOFT),y)
+ ARCHCPUFLAGS += -mfloat-abi=softfp
+ else
+ ARCHCPUFLAGS += -mfloat-abi=hard
+ endif
+ ifeq ($(CONFIG_ARCH_CORTEXA7),y)
+ ifneq ($(CONFIG_ARM_FP_NEON),y)
+ ARCHFPUVERSION = vfpv4
+ endif
+ else
+ ARCHFPUVERSION = vfpv3
+ endif
+
+ # Cortex-A5 | -mfpu=vfpv3-fp16 | -mfpu=vfpv3-d16-fp16 | -mfpu=neon-fp16
+ # Cortex-A7 | -mfpu=vfpv4 | -mfpu=vfpv4-d16 | -mfpu=neon-vfpv4
+ # Cortex-A8 | -mfpu=vfpv3 | | -mfpu=neon
+ # Cortex-A9 | -mfpu=vfpv3-fp16 | -mfpu=vfpv3-d16-fp16 | -mfpu=neon-fp16
+ # Cortex-A15 | -mfpu=vfpv4 | | -mfpu=neon-vfpv4
+
+ ARCHCPUFLAGS +=
-mfpu=$(ARCHNEONFLAGS)$(ARCHFPUVERSION)$(ARCHFPUD32FLAGS)$(ARCHFPUFPFLAGS)
Review comment:
Removed, I's try to support -fp16 flags but find that we need more info
like ARCH_FPU_FP16
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