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Using Intel asm syntax

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0u0 2018-08-31 10:47:50 +08:00
parent 639c56cc75
commit 5c3a6d1f5a
1 changed files with 53 additions and 52 deletions
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zh-cn/julia-cn.html.markdown
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@ -748,50 +748,51 @@ square_area(l) = l * l # => square_area (generic function with 1 method)
square_area(5) # => 25
# 当我们喂给 square_area 一个整数时会发生什么？
code_native(square_area, (Int32,))
# .text
# ; Function square_area {
# ; Location: REPL[49]:1
# pushq %rbp
# movq %rsp, %rbp
# ; Function *; {
# ; Location: int.jl:54
# imull %ecx, %ecx
# ;}
# movl %ecx, %eax
# popq %rbp
# retq
# nopl (%rax,%rax)
# ;}
code_native(square_area, (Int32,), syntax = :intel)
# .text
# ; Function square_area {
# ; Location: REPL[116]:1 # 函数序言 (Prologue)
# push rbp
# mov rbp, rsp
# ; Function *; {
# ; Location: int.jl:54
# imul ecx, ecx # 求 l 的平方，并把结果放在 ECX 中
# ;}
# mov eax, ecx
# pop rbp # 还原旧的基址指针(base pointer)
# ret # 返回值放在 EAX 中
# nop dword ptr [rax + rax]
# ;}
# 使用 syntax 参数指定输出语法。默认为 AT&T 格式，这里指定为 Intel 格式
code_native(square_area, (Float32,))
code_native(square_area, (Float32,), syntax = :intel)
# .text
# ; Function square_area {
# ; Location: REPL[49]:1
# pushq %rbp
# movq %rsp, %rbp
# ; Location: REPL[116]:1
# push rbp
# mov rbp, rsp
# ; Function *; {
# ; Location: float.jl:398
# vmulss %xmm0, %xmm0, %xmm0
# vmulss xmm0, xmm0, xmm0 # 标量双精度乘法 (AVX)
# ;}
# popq %rbp
# retq
# nopw (%rax,%rax)
# pop rbp
# ret
# nop word ptr [rax + rax]
# ;}
code_native(square_area, (Float64,))
code_native(square_area, (Float64,), syntax = :intel)
# .text
# ; Function square_area {
# ; Location: REPL[49]:1
# pushq %rbp
# movq %rsp, %rbp
# ; Location: REPL[116]:1
# push rbp
# mov rbp, rsp
# ; Function *; {
# ; Location: float.jl:399
# vmulsd %xmm0, %xmm0, %xmm0
# vmulsd xmm0, xmm0, xmm0 # 标量双精度乘法 (AVX)
# ;}
# popq %rbp
# retq
# nopw (%rax,%rax)
# pop rbp
# ret
# nop word ptr [rax + rax]
# ;}
# 注意！只要参数中有浮点数，Julia 就会使用浮点指令
@ -799,12 +800,12 @@ code_native(square_area, (Float64,))
circle_area(r) = pi * r * r # => circle_area (generic function with 1 method)
circle_area(5) # => 78.53981633974483
code_native(circle_area, (Int32,))
code_native(circle_area, (Int32,), syntax = :intel)
# .text
# ; Function circle_area {
# ; Location: REPL[53]:1
# pushq %rbp
# movq %rsp, %rbp
# ; Location: REPL[121]:1
# push rbp
# mov rbp, rsp
# ; Function *; {
# ; Location: operators.jl:502
# ; Function *; {
@ -817,41 +818,41 @@ code_native(circle_area, (Int32,))
# ; Location: number.jl:7
# ; Function Type; {
# ; Location: float.jl:60
# vcvtsi2sdl %ecx, %xmm0, %xmm0
# movabsq $532051920, %rax # imm = 0x1FB677D0
# vcvtsi2sd xmm0, xmm0, ecx # 从内存中读取整数 r
# movabs rax, 497710928 # 读取 pi
# ;}}}}}
# ; Function *; {
# ; Location: float.jl:399
# vmulsd (%rax), %xmm0, %xmm1
# vmulsd %xmm0, %xmm1, %xmm0
# vmulsd xmm1, xmm0, qword ptr [rax] # pi * r
# vmulsd xmm0, xmm1, xmm0 # (pi * r) * r
# ;}}
# popq %rbp
# retq
# nopl (%rax)
# pop rbp
# ret
# nop dword ptr [rax]
# ;}
code_native(circle_area, (Float64,))
code_native(circle_area, (Float64,), syntax = :intel)
# .text
# ; Function circle_area {
# ; Location: REPL[53]:1
# pushq %rbp
# movq %rsp, %rbp
# movabsq $532052040, %rax # imm = 0x1FB67848
# ; Location: REPL[121]:1
# push rbp
# mov rbp, rsp
# movabs rax, 497711048
# ; Function *; {
# ; Location: operators.jl:502
# ; Function *; {
# ; Location: promotion.jl:314
# ; Function *; {
# ; Location: float.jl:399
# vmulsd (%rax), %xmm0, %xmm1
# vmulsd xmm1, xmm0, qword ptr [rax]
# ;}}}
# ; Function *; {
# ; Location: float.jl:399
# vmulsd %xmm0, %xmm1, %xmm0
# vmulsd xmm0, xmm1, xmm0
# ;}
# popq %rbp
# retq
# nopl (%rax,%rax)
# pop rbp
# ret
# nop dword ptr [rax + rax]
# ;}
```