高级python中可移植的高效汇编代码生成器
Peach的Python项目详细描述
PEACH Py是一个用于编写高性能汇编内核的Python框架peach-py是为了在保留传统程序集所有优化机会的同时简化优化程序集内核的编写而开发的。一些桃黄色的特征：
- Automatic register allocation
- Stack frame management, including re-aligning of stack frame as needed
- Generating versions of a function for different calling conventions from the same source (e.g. functions for Microsoft x64 ABI and System V x86-64 ABI can be generated from the same source)
- Allows to define constants in the place where they are used (just like in high-level languages)
- Tracking of instruction extensions used in the function.
- Multiplexing of multiple instruction streams (helpful for software pipelining)
示例
from peachpy.x64 import *
# Use 'x64-ms' for Microsoft x64 ABI
abi = peachpy.c.ABI('x64-sysv')
assembler = Assembler(abi)
# Implement function void add_1(const uint32_t *src, uint32_t *dst, size_t length)
src_argument = peachpy.c.Parameter("src", peachpy.c.Type("const uint32_t*"))
dst_argument = peachpy.c.Parameter("dst", peachpy.c.Type("uint32_t*"))
len_argument = peachpy.c.Parameter("length", peachpy.c.Type("size_t"))
# This optimized kernel will target Intel Nehalem processors. Any instructions which are not
# supported on Intel Nehalem (e.g. AVX instructions) will generate an error. If you don't have
# a particular target in mind, use "Unknown"
with Function(assembler, "add_1", (src_argument, dst_argument, len_argument), "Nehalem"):
# Load arguments into registers
srcPointer = GeneralPurposeRegister64()
LOAD.PARAMETER( srcPointer, src_argument )
dstPointer = GeneralPurposeRegister64()
LOAD.PARAMETER( dstPointer, dst_argument )
length = GeneralPurposeRegister64()
LOAD.PARAMETER( length, len_argument )
# Main processing loop. Length must be a multiple of 4.
LABEL( 'loop' )
x = SSERegister()
MOVDQU( x, [srcPointer] )
ADD( srcPointer, 16 )
# Add 1 to x
PADDD( x, Constant.uint32x4(1) )
MOVDQU( [dstPointer], x )
ADD( dstPointer, 16 )
SUB( length, 4 )
JNZ( 'loop' )
RETURN()
print assembler
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