CMSIS-DSP的不同库版本含义和几个相关宏定义的作用

eric2013

不同版本：

• arm_cortexM7lfdp_math.lib (Cortex-M7, Little endian, Double Precision Floating Point Unit)
• arm_cortexM7bfdp_math.lib (Cortex-M7, Big endian, Double Precision Floating Point Unit)
• arm_cortexM7lfsp_math.lib (Cortex-M7, Little endian, Single Precision Floating Point Unit)
• arm_cortexM7bfsp_math.lib (Cortex-M7, Big endian and Single Precision Floating Point Unit on)
• arm_cortexM7l_math.lib (Cortex-M7, Little endian)
• arm_cortexM7b_math.lib (Cortex-M7, Big endian)
• arm_cortexM4lf_math.lib (Cortex-M4, Little endian, Floating Point Unit)
• arm_cortexM4bf_math.lib (Cortex-M4, Big endian, Floating Point Unit)
• arm_cortexM4l_math.lib (Cortex-M4, Little endian)
• arm_cortexM4b_math.lib (Cortex-M4, Big endian)
• arm_cortexM3l_math.lib (Cortex-M3, Little endian)
• arm_cortexM3b_math.lib (Cortex-M3, Big endian)
• arm_cortexM0l_math.lib (Cortex-M0 / Cortex-M0+, Little endian)
• arm_cortexM0b_math.lib (Cortex-M0 / Cortex-M0+, Big endian)
• arm_ARMv8MBLl_math.lib (Armv8-M Baseline, Little endian)
• arm_ARMv8MMLl_math.lib (Armv8-M Mainline, Little endian)
• arm_ARMv8MMLlfsp_math.lib (Armv8-M Mainline, Little endian, Single Precision Floating Point Unit)
• arm_ARMv8MMLld_math.lib (Armv8-M Mainline, Little endian, DSP instructions)
• arm_ARMv8MMLldfsp_math.lib (Armv8-M Mainline, Little endian, DSP instructions, Single Precision Floating Point Unit)
  

宏定义：

Each library project have different preprocessor macros.

• ARM_MATH_BIG_ENDIAN:
  

Define macro ARM_MATH_BIG_ENDIAN to build the library for big endian targets. By default library builds for little endian targets.

• ARM_MATH_MATRIX_CHECK:
  

Define macro ARM_MATH_MATRIX_CHECK for checking on the input and output sizes of matrices

• ARM_MATH_ROUNDING:
  

Define macro ARM_MATH_ROUNDING for rounding on support functions

• ARM_MATH_LOOPUNROLL:
  

Define macro ARM_MATH_LOOPUNROLL to enable manual loop unrolling in DSP functions

• ARM_MATH_NEON:
  

Define macro ARM_MATH_NEON to enable Neon versions of the DSP functions. It is not enabled by default when Neon is available because performances are dependent on the compiler and target architecture.

• ARM_MATH_NEON_EXPERIMENTAL:
  

Define macro ARM_MATH_NEON_EXPERIMENTAL to enable experimental Neon versions of of some DSP functions. Experimental Neon versions currently do not have better performances than the scalar versions.

eric2013

对于H7的话，我们用这个版本

arm_cortexM7lfdp_math.lib

小端，双精度浮点。

挖东衣宇

终于恢复了，机动

china_fan

测试是不是缓存