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/*
* Written by José Fonseca <j_r_fonseca@yahoo.co.uk>
*/
#include "matypes.h"
/* integer multiplication - alpha plus one
*
* makes the following approximation to the division (Sree)
*
* rgb*a/255 ~= (rgb*(a+1)) >> 256
*
* which is the fastest method that satisfies the following OpenGL criteria
*
* 0*0 = 0 and 255*255 = 255
*
* note that MX1 is a register with 0xffffffffffffffff constant which can be easily obtained making
*
* PCMPEQW ( MX1, MX1 )
*/
#define GMB_MULT_AP1( MP1, MA1, MP2, MA2, MX1 ) \
PSUBW ( MX1, MA1 ) /* a1 + 1 | a1 + 1 | a1 + 1 | a1 + 1 */ ;\
PMULLW ( MP1, MA1 ) /* t1 = p1*a1 */ ;\
;\
TWO(PSUBW ( MX1, MA2 )) /* a2 + 1 | a2 + 1 | a2 + 1 | a2 + 1 */ ;\
TWO(PMULLW ( MP2, MA2 )) /* t2 = p2*a2 */ ;\
;\
PSRLW ( CONST(8), MA1 ) /* t1 >> 8 ~= t1/255 */ ;\
TWO(PSRLW ( CONST(8), MA2 )) /* t2 >> 8 ~= t2/255 */
/* integer multiplication - geometric series
*
* takes the geometric series approximation to the division
*
* t/255 = (t >> 8) + (t >> 16) + (t >> 24) ..
*
* in this case just the first two terms to fit in 16bit arithmetic
*
* t/255 ~= (t + (t >> 8)) >> 8
*
* note that just by itself it doesn't satisfies the OpenGL criteria, as 255*255 = 254,
* so the special case a = 255 must be accounted or roundoff must be used
*/
#define GMB_MULT_GS( MP1, MA1, MP2, MA2 ) \
PMULLW ( MP1, MA1 ) /* t1 = p1*a1 */ ;\
TWO(PMULLW ( MP2, MA2 )) /* t2 = p2*a2 */ ;\
;\
MOVQ ( MA1, MP1 ) ;\
PSRLW ( CONST(8), MA1 ) /* t1 >> 8 */ ;\
;\
TWO(MOVQ ( MA2, MP2 )) ;\
TWO(PSRLW ( CONST(8), MA2 )) /* t2 >> 8 */ ;\
;\
PADDW ( MP1, MA1 ) /* t1 + (t1 >> 8) ~= (t1/255) << 8 */ ;\
PSRLW ( CONST(8), MA1 ) /* sa1 | sb1 | sg1 | sr1 */ ;\
;\
TWO(PADDW ( MP2, MA2 )) /* t2 + (t2 >> 8) ~= (t2/255) << 8 */ ;\
TWO(PSRLW ( CONST(8), MA2 )) /* sa2 | sb2 | sg2 | sr2 */
/* integer multiplication - geometric series plus rounding
*
* when using a geometric series division instead of truncating the result
* use roundoff in the approximation (Jim Blinn)
*
* t = rgb*a + 0x80
*
* achieving the exact results
*
* note that M80 is register with the 0x0080008000800080 constant
*/
#define GMB_MULT_GSR( MP1, MA1, MP2, MA2, M80 ) \
PMULLW ( MP1, MA1 ) /* t1 = p1*a1 */ ;\
PADDW ( M80, MA1 ) /* t1 += 0x80 */ ;\
;\
TWO(PMULLW ( MP2, MA2 )) /* t2 = p2*a2 */ ;\
TWO(PADDW ( M80, MA2 )) /* t2 += 0x80 */ ;\
;\
MOVQ ( MA1, MP1 ) ;\
PSRLW ( CONST(8), MA1 ) /* t1 >> 8 */ ;\
;\
TWO(MOVQ ( MA2, MP2 )) ;\
TWO(PSRLW ( CONST(8), MA2 )) /* t2 >> 8 */ ;\
;\
PADDW ( MP1, MA1 ) /* t1 + (t1 >> 8) ~= (t1/255) << 8 */ ;\
PSRLW ( CONST(8), MA1 ) /* sa1 | sb1 | sg1 | sr1 */ ;\
;\
TWO(PADDW ( MP2, MA2 )) /* t2 + (t2 >> 8) ~= (t2/255) << 8 */ ;\
TWO(PSRLW ( CONST(8), MA2 )) /* sa2 | sb2 | sg2 | sr2 */
/* linear interpolation - geometric series
*/
#define GMB_LERP_GS( MP1, MQ1, MA1, MP2, MQ2, MA2) \
PSUBW ( MQ1, MP1 ) /* pa1 - qa1 | pb1 - qb1 | pg1 - qg1 | pr1 - qr1 */ ;\
PSLLW ( CONST(8), MQ1 ) /* q1 << 8 */ ;\
PMULLW ( MP1, MA1 ) /* t1 = (q1 - p1)*pa1 */ ;\
;\
TWO(PSUBW ( MQ2, MP2 )) /* pa2 - qa2 | pb2 - qb2 | pg2 - qg2 | pr2 - qr2 */ ;\
TWO(PSLLW ( CONST(8), MQ2 )) /* q2 << 8 */ ;\
TWO(PMULLW ( MP2, MA2 )) /* t2 = (q2 - p2)*pa2 */ ;\
;\
MOVQ ( MA1, MP1 ) ;\
PSRLW ( CONST(8), MA1 ) /* t1 >> 8 */ ;\
;\
TWO(MOVQ ( MA2, MP2 )) ;\
TWO(PSRLW ( CONST(8), MA2 )) /* t2 >> 8 */ ;\
;\
PADDW ( MP1, MA1 ) /* t1 + (t1 >> 8) ~= (t1/255) << 8 */ ;\
TWO(PADDW ( MP2, MA2 )) /* t2 + (t2 >> 8) ~= (t2/255) << 8 */ ;\
;\
PADDW ( MQ1, MA1 ) /* (t1/255 + q1) << 8 */ ;\
TWO(PADDW ( MQ2, MA2 )) /* (t2/255 + q2) << 8 */ ;\
;\
PSRLW ( CONST(8), MA1 ) /* sa1 | sb1 | sg1 | sr1 */ ;\
TWO(PSRLW ( CONST(8), MA2 )) /* sa2 | sb2 | sg2 | sr2 */
/* linear interpolation - geometric series with roundoff
*
* this is a generalization of Blinn's formula to signed arithmetic
*
* note that M80 is a register with the 0x0080008000800080 constant
*/
#define GMB_LERP_GSR( MP1, MQ1, MA1, MP2, MQ2, MA2, M80) \
PSUBW ( MQ1, MP1 ) /* pa1 - qa1 | pb1 - qb1 | pg1 - qg1 | pr1 - qr1 */ ;\
PSLLW ( CONST(8), MQ1 ) /* q1 << 8 */ ;\
PMULLW ( MP1, MA1 ) /* t1 = (q1 - p1)*pa1 */ ;\
;\
TWO(PSUBW ( MQ2, MP2 )) /* pa2 - qa2 | pb2 - qb2 | pg2 - qg2 | pr2 - qr2 */ ;\
TWO(PSLLW ( CONST(8), MQ2 )) /* q2 << 8 */ ;\
TWO(PMULLW ( MP2, MA2 )) /* t2 = (q2 - p2)*pa2 */ ;\
;\
PSRLW ( CONST(15), MP1 ) /* q1 > p1 ? 1 : 0 */ ;\
TWO(PSRLW ( CONST(15), MP2 )) /* q2 > q2 ? 1 : 0 */ ;\
;\
PSLLW ( CONST(8), MP1 ) /* q1 > p1 ? 0x100 : 0 */ ;\
TWO(PSLLW ( CONST(8), MP2 )) /* q2 > q2 ? 0x100 : 0 */ ;\
;\
PSUBW ( MP1, MA1 ) /* t1 -=? 0x100 */ ;\
TWO(PSUBW ( MP2, MA2 )) /* t2 -=? 0x100 */ ;\
;\
PADDW ( M80, MA1 ) /* t1 += 0x80 */ ;\
TWO(PADDW ( M80, MA2 )) /* t2 += 0x80 */ ;\
;\
MOVQ ( MA1, MP1 ) ;\
PSRLW ( CONST(8), MA1 ) /* t1 >> 8 */ ;\
;\
TWO(MOVQ ( MA2, MP2 )) ;\
TWO(PSRLW ( CONST(8), MA2 )) /* t2 >> 8 */ ;\
;\
PADDW ( MP1, MA1 ) /* t1 + (t1 >> 8) ~= (t1/255) << 8 */ ;\
TWO(PADDW ( MP2, MA2 )) /* t2 + (t2 >> 8) ~= (t2/255) << 8 */ ;\
;\
PADDW ( MQ1, MA1 ) /* (t1/255 + q1) << 8 */ ;\
TWO(PADDW ( MQ2, MA2 )) /* (t2/255 + q2) << 8 */ ;\
;\
PSRLW ( CONST(8), MA1 ) /* sa1 | sb1 | sg1 | sr1 */ ;\
TWO(PSRLW ( CONST(8), MA2 )) /* sa2 | sb2 | sg2 | sr2 */
/* linear interpolation - geometric series with correction
*
* instead of the roundoff this adds a small correction to satisfy the OpenGL criteria
*
* t/255 ~= (t + (t >> 8) + (t >> 15)) >> 8
*
* note that although is faster than rounding off it doesn't give always the exact results
*/
#define GMB_LERP_GSC( MP1, MQ1, MA1, MP2, MQ2, MA2) \
PSUBW ( MQ1, MP1 ) /* pa1 - qa1 | pb1 - qb1 | pg1 - qg1 | pr1 - qr1 */ ;\
PSLLW ( CONST(8), MQ1 ) /* q1 << 8 */ ;\
PMULLW ( MP1, MA1 ) /* t1 = (q1 - p1)*pa1 */ ;\
;\
TWO(PSUBW ( MQ2, MP2 )) /* pa2 - qa2 | pb2 - qb2 | pg2 - qg2 | pr2 - qr2 */ ;\
TWO(PSLLW ( CONST(8), MQ2 )) /* q2 << 8 */ ;\
TWO(PMULLW ( MP2, MA2 )) /* t2 = (q2 - p2)*pa2 */ ;\
;\
MOVQ ( MA1, MP1 ) ;\
PSRLW ( CONST(8), MA1 ) /* t1 >> 8 */ ;\
;\
TWO(MOVQ ( MA2, MP2 )) ;\
TWO(PSRLW ( CONST(8), MA2 )) /* t2 >> 8 */ ;\
;\
PADDW ( MA1, MP1 ) /* t1 + (t1 >> 8) ~= (t1/255) << 8 */ ;\
PSRLW ( CONST(7), MA1 ) /* t1 >> 15 */ ;\
;\
TWO(PADDW ( MA2, MP2 )) /* t2 + (t2 >> 8) ~= (t2/255) << 8 */ ;\
TWO(PSRLW ( CONST(7), MA2 )) /* t2 >> 15 */ ;\
;\
PADDW ( MP1, MA1 ) /* t1 + (t1 >> 8) + (t1 >>15) ~= (t1/255) << 8 */ ;\
TWO(PADDW ( MP2, MA2 )) /* t2 + (t2 >> 8) + (t2 >>15) ~= (t2/255) << 8 */ ;\
;\
PADDW ( MQ1, MA1 ) /* (t1/255 + q1) << 8 */ ;\
TWO(PADDW ( MQ2, MA2 )) /* (t2/255 + q2) << 8 */ ;\
;\
PSRLW ( CONST(8), MA1 ) /* sa1 | sb1 | sg1 | sr1 */ ;\
TWO(PSRLW ( CONST(8), MA2 )) /* sa2 | sb2 | sg2 | sr2 */
/* common blending setup code
*
* note that M00 is a register with 0x0000000000000000 constant which can be easily obtained making
*
* PXOR ( M00, M00 )
*/
#define GMB_LOAD(rgba, dest, MPP, MQQ) \
ONE(MOVD ( REGIND(rgba), MPP )) /* | | | | qa1 | qb1 | qg1 | qr1 */ ;\
ONE(MOVD ( REGIND(dest), MQQ )) /* | | | | pa1 | pb1 | pg1 | pr1 */ ;\
;\
TWO(MOVQ ( REGIND(rgba), MPP )) /* qa2 | qb2 | qg2 | qr2 | qa1 | qb1 | qg1 | qr1 */ ;\
TWO(MOVQ ( REGIND(dest), MQQ )) /* pa2 | pb2 | pg2 | pr2 | pa1 | pb1 | pg1 | pr1 */
#define GMB_UNPACK(MP1, MQ1, MP2, MQ2, M00) \
TWO(MOVQ ( MP1, MP2 )) ;\
TWO(MOVQ ( MQ1, MQ2 )) ;\
;\
PUNPCKLBW ( M00, MQ1 ) /* qa1 | qb1 | qg1 | qr1 */ ;\
TWO(PUNPCKHBW ( M00, MQ2 )) /* qa2 | qb2 | qg2 | qr2 */ ;\
PUNPCKLBW ( M00, MP1 ) /* pa1 | pb1 | pg1 | pr1 */ ;\
TWO(PUNPCKHBW ( M00, MP2 )) /* pa2 | pb2 | pg2 | pr2 */
#define GMB_ALPHA(MP1, MA1, MP2, MA2) \
MOVQ ( MP1, MA1 ) ;\
TWO(MOVQ ( MP2, MA2 )) ;\
;\
PUNPCKHWD ( MA1, MA1 ) /* pa1 | pa1 | | */ ;\
TWO(PUNPCKHWD ( MA2, MA2 )) /* pa2 | pa2 | | */ ;\
PUNPCKHDQ ( MA1, MA1 ) /* pa1 | pa1 | pa1 | pa1 */ ;\
TWO(PUNPCKHDQ ( MA2, MA2 )) /* pa2 | pa2 | pa2 | pa2 */
#define GMB_PACK( MS1, MS2 ) \
PACKUSWB ( MS2, MS1 ) /* sa2 | sb2 | sg2 | sr2 | sa1 | sb1 | sg1 | sr1 */ ;\
#define GMB_STORE(rgba, MSS ) \
ONE(MOVD ( MSS, REGIND(rgba) )) /* | | | | sa1 | sb1 | sg1 | sr1 */ ;\
TWO(MOVQ ( MSS, REGIND(rgba) )) /* sa2 | sb2 | sg2 | sr2 | sa1 | sb1 | sg1 | sr1 */
SEG_DATA
ALIGNDATA8
const_0080:
D_LONG 0x00800080, 0x00800080
const_80:
D_LONG 0x80808080, 0x80808080
SEG_TEXT
/* Blend transparency function
*/
#define TAG(x) x##_transparency
#define INIT \
PXOR ( MM0, MM0 ) /* 0x0000 | 0x0000 | 0x0000 | 0x0000 */
#define MAIN( rgba, dest ) \
GMB_LOAD( rgba, dest, MM1, MM2 ) ;\
GMB_UNPACK( MM1, MM2, MM4, MM5, MM0 ) ;\
GMB_ALPHA( MM1, MM3, MM4, MM6 ) ;\
GMB_LERP_GSC( MM1, MM2, MM3, MM4, MM5, MM6 ) ;\
GMB_PACK( MM3, MM6 ) ;\
GMB_STORE( rgba, MM3 )
#include "mmx_blendtmp.h"
/* Blend add function
*
* FIXME: Add some loop unrolling here...
*/
#define TAG(x) x##_add
#define INIT
#define MAIN( rgba, dest ) \
ONE(MOVD ( REGIND(rgba), MM1 )) /* | | | | qa1 | qb1 | qg1 | qr1 */ ;\
ONE(MOVD ( REGIND(dest), MM2 )) /* | | | | pa1 | pb1 | pg1 | pr1 */ ;\
ONE(PADDUSB ( MM2, MM1 )) ;\
ONE(MOVD ( MM1, REGIND(rgba) )) /* | | | | sa1 | sb1 | sg1 | sr1 */ ;\
;\
TWO(MOVQ ( REGIND(rgba), MM1 )) /* qa2 | qb2 | qg2 | qr2 | qa1 | qb1 | qg1 | qr1 */ ;\
TWO(PADDUSB ( REGIND(dest), MM1 )) /* sa2 | sb2 | sg2 | sr2 | sa1 | sb1 | sg1 | sr1 */ ;\
TWO(MOVQ ( MM1, REGIND(rgba) ))
#include "mmx_blendtmp.h"
/* Blend min function
*/
#define TAG(x) x##_min
#define INIT \
MOVQ ( CONTENT(const_80), MM7 ) /* 0x80| 0x80| 0x80| 0x80| 0x80| 0x80| 0x80| 0x80*/
#define MAIN( rgba, dest ) \
GMB_LOAD( rgba, dest, MM1, MM2 ) ;\
MOVQ ( MM1, MM3 ) ;\
MOVQ ( MM2, MM4 ) ;\
PXOR ( MM7, MM3 ) /* unsigned -> signed */ ;\
PXOR ( MM7, MM4 ) /* unsigned -> signed */ ;\
PCMPGTB ( MM3, MM4 ) /* q > p ? 0xff : 0x00 */ ;\
PAND ( MM4, MM1 ) /* q > p ? p : 0 */ ;\
PANDN ( MM2, MM4 ) /* q > p ? 0 : q */ ;\
POR ( MM1, MM4 ) /* q > p ? p : q */ ;\
GMB_STORE( rgba, MM4 )
#include "mmx_blendtmp.h"
/* Blend max function
*/
#define TAG(x) x##_max
#define INIT \
MOVQ ( CONTENT(const_80), MM7 ) /* 0x80| 0x80| 0x80| 0x80| 0x80| 0x80| 0x80| 0x80*/
#define MAIN( rgba, dest ) \
GMB_LOAD( rgba, dest, MM1, MM2 ) ;\
MOVQ ( MM1, MM3 ) ;\
MOVQ ( MM2, MM4 ) ;\
PXOR ( MM7, MM3 ) /* unsigned -> signed */ ;\
PXOR ( MM7, MM4 ) /* unsigned -> signed */ ;\
PCMPGTB ( MM3, MM4 ) /* q > p ? 0xff : 0x00 */ ;\
PAND ( MM4, MM2 ) /* q > p ? q : 0 */ ;\
PANDN ( MM1, MM4 ) /* q > p ? 0 : p */ ;\
POR ( MM2, MM4 ) /* q > p ? p : q */ ;\
GMB_STORE( rgba, MM4 )
#include "mmx_blendtmp.h"
/* Blend modulate function
*/
#define TAG(x) x##_modulate
#define INIT \
PXOR ( MM0, MM0 ) /* 0x0000 | 0x0000 | 0x0000 | 0x0000 */ ;\
MOVQ ( CONTENT(const_0080), MM7 ) /* 0x0080 | 0x0080 | 0x0080 | 0x0080 */
#define MAIN( rgba, dest ) \
GMB_LOAD( rgba, dest, MM1, MM2 ) ;\
GMB_UNPACK( MM1, MM2, MM4, MM5, MM0 ) ;\
GMB_MULT_GSR( MM1, MM2, MM4, MM5, MM7 ) ;\
GMB_PACK( MM2, MM5 ) ;\
GMB_STORE( rgba, MM2 )
#include "mmx_blendtmp.h"
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