Commit 303c484e authored by sasshka's avatar sasshka Committed by Henrik Gramner
Browse files

ppc: Optimize quant functions

1) using xxpermdi + merge instead of 2 merges improves quant_8x8
performance by 5%

2) use vec_splats instead of vec_splat

checkasm timings when compiled with gcc:
                  C:            AltiVec:
                                before: after:
quant_2x2_dc:      57            163      46
quant_4x4_dc:     141            162      57

dequant_4x4_cmp:  104            101      45
dequant_4x4_flat: 104            106      46
dequant_8x8_cmp:  412            208     147
dequant_8x8_flat: 414            212     149
parent 44f16713
......@@ -39,8 +39,8 @@
biasvB = vec_ld((idx1), bias); \
mskA = vec_cmplt(temp1v, zero_s16v); \
mskB = vec_cmplt(temp2v, zero_s16v); \
coefvA = (vec_u16_t)vec_max(vec_sub(zero_s16v, temp1v), temp1v);\
coefvB = (vec_u16_t)vec_max(vec_sub(zero_s16v, temp2v), temp2v);\
coefvA = (vec_u16_t)vec_abs( temp1v ); \
coefvB = (vec_u16_t)vec_abs( temp2v ); \
coefvA = vec_adds(coefvA, biasvA); \
coefvB = vec_adds(coefvB, biasvB); \
multEvenvA = vec_mule(coefvA, mfvA); \
......@@ -51,8 +51,12 @@
multOddvA = vec_sr(multOddvA, i_qbitsv); \
multEvenvB = vec_sr(multEvenvB, i_qbitsv); \
multOddvB = vec_sr(multOddvB, i_qbitsv); \
temp1v = (vec_s16_t) vec_packs(vec_mergeh(multEvenvA, multOddvA), vec_mergel(multEvenvA, multOddvA)); \
temp2v = (vec_s16_t) vec_packs(vec_mergeh(multEvenvB, multOddvB), vec_mergel(multEvenvB, multOddvB)); \
temp1v = (vec_s16_t) vec_packs( multEvenvA, multOddvA ); \
tmpv = xxpermdi( temp1v, temp1v, 2 ); \
temp1v = vec_mergeh( temp1v, tmpv ); \
temp2v = (vec_s16_t) vec_packs( multEvenvB, multOddvB ); \
tmpv = xxpermdi( temp2v, temp2v, 2 ); \
temp2v = vec_mergeh( temp2v, tmpv ); \
temp1v = vec_xor(temp1v, mskA); \
temp2v = vec_xor(temp2v, mskB); \
temp1v = vec_adds(temp1v, vec_and(mskA, one)); \
......@@ -80,7 +84,7 @@ int x264_quant_4x4_altivec( int16_t dct[16], uint16_t mf[16], uint16_t bias[16]
vec_u16_t mfvB;
vec_u16_t biasvB;
vec_s16_t temp1v, temp2v;
vec_s16_t temp1v, temp2v, tmpv;
vec_u32_u qbits_u;
qbits_u.s[0]=16;
......@@ -139,17 +143,9 @@ int x264_quant_4x4_dc_altivec( int16_t dct[16], int mf, int bias )
vec_u16_t mfv;
vec_u16_t biasv;
vec_u16_u mf_u;
mf_u.s[0]=mf;
mfv = vec_splat( mf_u.v, 0 );
vec_u32_u qbits_u;
qbits_u.s[0]=16;
i_qbitsv = vec_splat(qbits_u.v, 0);
vec_u16_u bias_u;
bias_u.s[0]=bias;
biasv = vec_splat(bias_u.v, 0);
mfv = vec_splats( (uint16_t)mf );
i_qbitsv = vec_splats( (uint32_t) 16 );
biasv = vec_splats( (uint16_t)bias );
QUANT_16_U_DC( 0, 16 );
return vec_any_ne(nz, zero_s16v);
......@@ -190,17 +186,9 @@ int x264_quant_2x2_dc_altivec( int16_t dct[4], int mf, int bias )
vec_u16_t mfv;
vec_u16_t biasv;
vec_u16_u mf_u;
mf_u.s[0]=mf;
mfv = vec_splat( mf_u.v, 0 );
vec_u32_u qbits_u;
qbits_u.s[0]=16;
i_qbitsv = vec_splat(qbits_u.v, 0);
vec_u16_u bias_u;
bias_u.s[0]=bias;
biasv = vec_splat(bias_u.v, 0);
mfv = vec_splats( (uint16_t)mf );
i_qbitsv = vec_splats( (uint32_t) 16 );
biasv = vec_splats( (uint16_t)bias );
static const vec_s16_t mask2 = CV(-1, -1, -1, -1, 0, 0, 0, 0);
QUANT_4_U_DC(0);
......@@ -225,7 +213,7 @@ int x264_quant_8x8_altivec( int16_t dct[64], uint16_t mf[64], uint16_t bias[64]
vec_u16_t mfvB;
vec_u16_t biasvB;
vec_s16_t temp1v, temp2v;
vec_s16_t temp1v, temp2v, tmpv;
vec_u32_u qbits_u;
qbits_u.s[0]=16;
......@@ -247,6 +235,9 @@ int x264_quant_8x8_altivec( int16_t dct[64], uint16_t mf[64], uint16_t bias[64]
multOddvA = vec_mulo(dctv, mfv); \
dctv = (vec_s16_t) vec_packs(vec_mergeh(multEvenvA, multOddvA), \
vec_mergel(multEvenvA, multOddvA)); \
dctv = (vec_s16_t) vec_packs( multEvenvA, multOddvA ); \
tmpv = xxpermdi( dctv, dctv, 2 ); \
dctv = vec_mergeh( dctv, tmpv ); \
dctv = vec_sl(dctv, i_qbitsv); \
vec_st(dctv, 8*y, dct); \
}
......@@ -288,7 +279,7 @@ void x264_dequant_4x4_altivec( int16_t dct[16], int dequant_mf[6][16], int i_qp
int i_mf = i_qp%6;
int i_qbits = i_qp/6 - 4;
vec_s16_t dctv;
vec_s16_t dctv, tmpv;
vec_s16_t dct1v, dct2v;
vec_s32_t mf1v, mf2v;
vec_s16_t mfv;
......@@ -298,9 +289,7 @@ void x264_dequant_4x4_altivec( int16_t dct[16], int dequant_mf[6][16], int i_qp
if( i_qbits >= 0 )
{
vec_u16_t i_qbitsv;
vec_u16_u qbits_u;
qbits_u.s[0]=i_qbits;
i_qbitsv = vec_splat(qbits_u.v, 0);
i_qbitsv = vec_splats( (uint16_t) i_qbits );
for( int y = 0; y < 4; y+=2 )
DEQUANT_SHL();
......@@ -310,19 +299,13 @@ void x264_dequant_4x4_altivec( int16_t dct[16], int dequant_mf[6][16], int i_qp
const int f = 1 << (-i_qbits-1);
vec_s32_t fv;
vec_u32_u f_u;
f_u.s[0]=f;
fv = (vec_s32_t)vec_splat(f_u.v, 0);
fv = vec_splats( f );
vec_u32_t i_qbitsv;
vec_u32_u qbits_u;
qbits_u.s[0]=-i_qbits;
i_qbitsv = vec_splat(qbits_u.v, 0);
i_qbitsv = vec_splats( (uint32_t)-i_qbits );
vec_u32_t sixteenv;
vec_u32_u sixteen_u;
sixteen_u.s[0]=16;
sixteenv = vec_splat(sixteen_u.v, 0);
sixteenv = vec_splats( (uint32_t)16 );
for( int y = 0; y < 4; y+=2 )
DEQUANT_SHR();
......@@ -334,7 +317,7 @@ void x264_dequant_8x8_altivec( int16_t dct[64], int dequant_mf[6][64], int i_qp
int i_mf = i_qp%6;
int i_qbits = i_qp/6 - 6;
vec_s16_t dctv;
vec_s16_t dctv, tmpv;
vec_s16_t dct1v, dct2v;
vec_s32_t mf1v, mf2v;
vec_s16_t mfv;
......@@ -344,9 +327,7 @@ void x264_dequant_8x8_altivec( int16_t dct[64], int dequant_mf[6][64], int i_qp
if( i_qbits >= 0 )
{
vec_u16_t i_qbitsv;
vec_u16_u qbits_u;
qbits_u.s[0]=i_qbits;
i_qbitsv = vec_splat(qbits_u.v, 0);
i_qbitsv = vec_splats((uint16_t)i_qbits );
for( int y = 0; y < 16; y+=2 )
DEQUANT_SHL();
......@@ -356,19 +337,13 @@ void x264_dequant_8x8_altivec( int16_t dct[64], int dequant_mf[6][64], int i_qp
const int f = 1 << (-i_qbits-1);
vec_s32_t fv;
vec_u32_u f_u;
f_u.s[0]=f;
fv = (vec_s32_t)vec_splat(f_u.v, 0);
fv = vec_splats( f );
vec_u32_t i_qbitsv;
vec_u32_u qbits_u;
qbits_u.s[0]=-i_qbits;
i_qbitsv = vec_splat(qbits_u.v, 0);
i_qbitsv = vec_splats( (uint32_t)-i_qbits );
vec_u32_t sixteenv;
vec_u32_u sixteen_u;
sixteen_u.s[0]=16;
sixteenv = vec_splat(sixteen_u.v, 0);
sixteenv = vec_splats( (uint32_t)16 );
for( int y = 0; y < 16; y+=2 )
DEQUANT_SHR();
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment