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Update MathUtilNeon64.inl 

Rewrite  CrossVec3 function code
This commit is contained in:
wangqm0513 2014-11-24 09:50:12 +08:00 committed by James Chen
parent 2c0445b25d
commit a6128d7506
1 changed files with 24 additions and 13 deletions
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37
cocos/math/MathUtilNeon64.inl
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@ -225,23 +225,34 @@ inline void MathUtilNeon64::transformVec4(const float* m, const float* v, float*
inline void MathUtilNeon64::crossVec3(const float* v1, const float* v2, float* dst)
{
asm volatile(
"ld1 {v0.2s}, [%2] \n\t" //
"ld1 {v0.s}[3], [%1] \n\t" //
"mov v0.s[2], v0.s[1] \n\t" // q0 = (v1y, v1z, v1z, v1x)
asm volatile(
"ld1 {v0.2s}, [%2] \n\t"
"ld1 {v0.s}[2], [%1] \n\t"
"mov v0.s[3], v0.s[0] \n\t" // q0 = (v1y, v1z, v1x, v1x)
"ld1 {v1.s}[1], [%3] \n\t" //
"ld1 {v1.s}[2], [%4], 4 \n\t" //
"ld1 {v1.s}[3], [%4] \n\t" //
"mov v1.s[0], v1.s[3] \n\t" // q1 = (v2z, v2x, v2y, v2z)
"ld1 {v1.4s}, [%3] \n\t"
"mov v1.s[3], v1.s[0] \n\t" // q1 = (v2x, v2y, v2z, v2x)
"fmul v2.4s, v0.4s, v1.4s \n\t" // x = v1y * v2z, y = v1z * v2x
"fsub s8, s8, s10 \n\t"
"fsub s9, s9, s11 \n\t" // x -= v1z * v2y, y-= v1x - v2z
"fmul s10, s3, s6 \n\t" // z = v1x * v2y
"fmul s11, s0, s5 \n\t" // z-= v1y * vx
"fsub s10, s10, s11 \n\t"
"mov v0.s[0], v0.s[1] \n\t"
"mov v0.s[1], v0.s[2] \n\t"
"mov v0.s[2], v0.s[3] \n\t"
"mov v1.s[3], v1.s[2] \n\t"
"fmul v0.4s, v0.4s, v1.4s \n\t"
"mov v0.s[3], v0.s[1] \n\t"
"mov v0.s[1], v0.s[2] \n\t"
"mov v0.s[2], v0.s[0] \n\t"
"fsub v2.4s, v0.4s, v2.4s \n\t"
"mov v2.s[0], v2.s[1] \n\t"
"mov v2.s[1], v2.s[2] \n\t"
"mov v2.s[2], v2.s[3] \n\t"
"st1 {v2.2s}, [%0], 8 \n\t" // V[x, y]
"st1 {v2.s}[2], [%0] \n\t" // V[z]