1#
2# Copyright (C) 2016 The Android Open Source Project
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#      http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15#
16
17GCC = $(CROSS_COMPILE)gcc
18OBJCOPY = $(CROSS_COMPILE)objcopy
19
20FLAGS += -mthumb -mcpu=cortex-m4 -march=armv7e-m -mfloat-abi=softfp -mfpu=fpv4-sp-d16 -mno-thumb-interwork -ffast-math -fsingle-precision-constant -DARM -DUSE_NANOHUB_FLOAT_RUNTIME
21APPFLAGS += -Wl,-T misc/cpu/$(CPU)/app.lkr -mno-pic-data-is-text-relative
22
23#defines
24FLAGS += -DCPU_NUM_PERSISTENT_RAM_BITS=32
25
26#cpu runtime
27SRCS_os += src/cpu/$(CPU)/atomicBitset.c src/cpu/$(CPU)/cpu.c src/cpu/$(CPU)/pendsv.c src/cpu/$(CPU)/atomic.c src/cpu/$(CPU)/appSupport.c src/cpu/$(CPU)/cpuMath.c
28
29#cpu runtime for bootloader
30SRCS_bl += src/cpu/$(CPU)/cpu.c
31
32#floating point runtime (ARM)
33SRCS_os += external/arm/arm_cos_f32.c external/arm/arm_sin_f32.c external/arm/arm_common_tables.c
34FLAGS += -DARM_MATH_CM4 -D__FPU_PRESENT
35
36#floating point runtime (FreeBSD)
37SRCS_os += external/freebsd/lib/msun/src/e_atan2f.c external/freebsd/lib/msun/src/e_expf.c external/freebsd/lib/msun/src/s_atanf.c
38FLAGS += -DFLT_EVAL_METHOD
39
40#extra deps
41DEPS += $(wildcard inc/cpu/$(CPU)/*.h)
42
43#bad words for C-M4F
44BADWORDS += "__floatundisf=When casting a uint64_t to float, use floatFromUint64"
45BADWORDS += "__floatdisf=When casting a int64_t to float, use floatFromInt64"
46BADWORDS += "__fixunssfdi=When casting a float to a uint64_t, use floatToUint64"
47BADWORDS += "__fixsfdi=When casting a float to a int64_t, use floatToInt64"
48BADWORDS += "__aeabi_uldivmod=Do not ever divide uint64_t by anything, see cpuMath.h"
49BADWORDS += "__aeabi_ldivmod=Do not ever divide int64_t by anything, see cpuMath.h"
50BADWORDS += "sinf=include nanhub_math.h before using sinf()"
51BADWORDS += "cosf=include nanhub_math.h before using cosf()"
52BADWORDS += "asinf=include nanhub_math.h before using asinf()"
53
54#all softfloat double funcs are forbidden
55BADWORDS += __muldf3 __divdf3 __subdf3 __adddf3 __truncdfsf2
56
57
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60