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moved the Float32toFloat16 codes to .cpp

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This commit is contained in:
HuYingzhuo(hugo/hyzboy)
2023-06-06 12:16:22 +08:00
parent 215494ead2
commit 03e66d7050
3 changed files with 59 additions and 51 deletions
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51
inc/hgl/math/HalfFloat.h
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@@ -52,56 +52,7 @@ namespace hgl
/** /**
* 标准版float32转float16处理 * 标准版float32转float16处理
*/ */
void Float32toFloat16(half_float *output,const float *input,const uint count) void Float32toFloat16(half_float *output,const float *input,const uint count);
{
const uint32 *src=(const uint32 *)input;
uint16 *dst=output;
for(uint i=0;i<count;i++)
{
uint32 value=src[i];
uint32 sign_bit=value&0x80000000;
uint32 exponent=(value&0x7F800000)>>23;
uint32 mantissa=value&0x007FFFFF;
if(exponent==0xFF)
{
if(mantissa==0)
dst[i]=sign_bit>>16;
else
dst[i]=0x7FFF;
}
else
{
if(exponent==0)
{
if(mantissa==0)
dst[i]=sign_bit>>16;
else
{
uint32 mantissa_bit=0x00800000;
while((mantissa&mantissa_bit)==0)
{
mantissa_bit>>=1;
--exponent;
}
exponent+=1;
mantissa&=~mantissa_bit;
}
}
else
{
exponent+=15-127;
mantissa>>=13;
}
dst[i]=sign_bit>>16|exponent<<10|mantissa;
}
}
}
/** /**
* 快速版float32转float16处理 * 快速版float32转float16处理

4
src/CMakeLists.txt
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@@ -35,11 +35,13 @@ SET(MATH_HEADER_FILES ${MATH_INCLUDE_PATH}/bvec.h
${MATH_INCLUDE_PATH}/Vector.h ${MATH_INCLUDE_PATH}/Vector.h
${MATH_INCLUDE_PATH}/PrimaryMathematics.h ${MATH_INCLUDE_PATH}/PrimaryMathematics.h
${MATH_INCLUDE_PATH}/PhysicsConst.h ${MATH_INCLUDE_PATH}/PhysicsConst.h
${MATH_INCLUDE_PATH}/HalfFloat.h
) )
SET(MATH_SOURCE_FILES Math/LAtan.cpp SET(MATH_SOURCE_FILES Math/LAtan.cpp
Math/LSinCos.cpp Math/LSinCos.cpp
Math/Matrix4f.cpp) Math/Matrix4f.cpp
Math/HalfFloat.cpp)
SOURCE_GROUP("Math\\Header Files" FILES ${MATH_HEADER_FILES}) SOURCE_GROUP("Math\\Header Files" FILES ${MATH_HEADER_FILES})
SOURCE_GROUP("Math\\Source Files" FILES ${MATH_SOURCE_FILES}) SOURCE_GROUP("Math\\Source Files" FILES ${MATH_SOURCE_FILES})

55
src/Math/HalfFloat.cpp Normal file
View File

@@ -0,0 +1,55 @@
#include<hgl/math/HalfFloat.h>
namespace hgl
{
void Float32toFloat16(half_float *output,const float *input,const uint count)
{
const uint32 *src=(const uint32 *)input;
uint16 *dst=output;
for(uint i=0;i<count;i++)
{
uint32 value=src[i];
uint32 sign_bit=value&0x80000000;
uint32 exponent=(value&0x7F800000)>>23;
uint32 mantissa=value&0x007FFFFF;
if(exponent==0xFF)
{
if(mantissa==0)
dst[i]=sign_bit>>16;
else
dst[i]=0x7FFF;
}
else
{
if(exponent==0)
{
if(mantissa==0)
dst[i]=sign_bit>>16;
else
{
uint32 mantissa_bit=0x00800000;
while((mantissa&mantissa_bit)==0)
{
mantissa_bit>>=1;
--exponent;
}
exponent+=1;
mantissa&=~mantissa_bit;
}
}
else
{
exponent+=15-127;
mantissa>>=13;
}
dst[i]=sign_bit>>16|exponent<<10|mantissa;
}
}
}
}//namespace hgl