![]()
![]()
浮点运算 汇编
代码实现
在硬件实现FPU后，可通过内联汇编的方式，指定浮点指令对其进行测试，以下罗列出相关测试代码。如有错误，欢迎大家评论指出。
//feqs_test
__STAtiC_FORCEINLINE int feqs_test(float a,float b)
{
int zero = 0;
asm volatile (
"feq.s %0, %1, %2nt"
:"=r"(zero)
:"f"(a),"f"(b)
);
return zero;
}
//flts_test__STATIC_FORCEINLINE int flts_test(float a,float b)
{
int zero = 0;
asm volatile (
"flt.s %0, %1, %2nt"
:"=r"(zero)
:"f"(a),"f"(b)
);
return zero;
}
//fles_test__STATIC_FORCEINLINE int fles_test(float a,float b)
{
int zero = 0;
asm volatile (
"fle.s %0, %1, %2nt"
:"=r"(zero)
:"f"(a),"f"(b)
);
return zero;
}
//fclass_test__STATIC_FORCEINLINE int fclass_test(float a)
{
int zero = 0;
asm volatile (
"fclass.s %0, %1nt"
:"=r"(zero)
:"f"(a)
);
return zero;
}
//fsgnjs_test__STATIC_FORCEINLINE float fsgnjs_test(float a,float b)
{
float zero = 0;
asm volatile (
"fsgnj.s %0, %1, %2nt"
:"=f"(zero)
:"f"(a),"f"(b)
);
return zero;
}
//fsgnjns_test__STATIC_FORCEINLINE float fsgnjns_test(float a,float b)
{
float zero = 0;
asm volatile (
"fsgnjn.s %0, %1, %2nt"
:"=f"(zero)
:"f"(a),"f"(b)
);
return zero;
}
//fsgnjxs_test__STATIC_FORCEINLINE float fsgnjxs_test(float a,float b)
{
float zero = 0;
asm volatile (
"fsgnjx.s %0, %1, %2nt"
:"=f"(zero)
:"f"(a),"f"(b)
);
return zero;
}
//fcvts_sw_test__STATIC_FORCEINLINE float fcvts_sw_test(int a)
{
float zero = 0;
asm volatile (
"fcvt.s.w %0, %1nt"
:"=f"(zero)
:"r"(a)
);
return zero;
}
//fcvts_swu_test__STATIC_FORCEINLINE float fcvts_swu_test(unsigned int a)
{
float zero = 0;
asm volatile (
"fcvt.s.wu %0, %1nt"
:"=f"(zero)
:"r"(a)
);
return zero;
}
//fcvts_ws_test__STATIC_FORCEINLINE int fcvts_ws_test(float a)
{
int zero = 0;
asm volatile (
"fcvt.w.s %0, %1nt"
:"=r"(zero)
:"f"(a)
);
return zero;
}
//fcvts_wus_test__STATIC_FORCEINLINE unsigned int fcvts_wus_test(float a)
{
unsigned int zero = 0;
asm volatile (
"fcvt.wu.s %0, %1nt"
:"=r"(zero)
:"f"(a)
);
return zero;
}
//fmv_xw_test__STATIC_FORCEINLINE int fmv_xw_test(float a)
{
int zero = 0;
asm volatile (
"fmv.x.w %0, %1nt"
:"=r"(zero)
:"f"(a)
);
return zero;
}
//fmv_wx_test__STATIC_FORCEINLINE float fmv_wx_test(int a)
{
float zero = 0;
asm volatile (
"fmv.w.x %0, %1nt"
:"=f"(zero)
:"r"(a)
);
return zero;
}
更多回帖
