/* * Written by Jos� Fonseca <j_r_fonseca@yahoo.co.uk> */ /* * void _mesa_mmx_blend( struct gl_context *ctx, * GLuint n, * const GLubyte mask[], * GLchan rgba[][4], * CONST GLchan dest[][4] ) * */ ALIGNTEXT16 GLOBL GLNAME( TAG(_mesa_mmx_blend) ) HIDDEN( TAG(_mesa_mmx_blend) ) GLNAME( TAG(_mesa_mmx_blend) ): PUSH_L ( EBP ) MOV_L ( ESP, EBP ) PUSH_L ( ESI ) PUSH_L ( EDI ) PUSH_L ( EBX ) MOV_L ( REGOFF(12, EBP), ECX ) /* n */ CMP_L ( CONST(0), ECX) JE ( LLTAG(GMB_return) ) MOV_L ( REGOFF(16, EBP), EBX ) /* mask */ MOV_L ( REGOFF(20, EBP), EDI ) /* rgba */ MOV_L ( REGOFF(24, EBP), ESI ) /* dest */ INIT TEST_L ( CONST(4), EDI ) /* align rgba on an 8-byte boundary */ JZ ( LLTAG(GMB_align_end) ) CMP_B ( CONST(0), REGIND(EBX) ) /* *mask == 0 */ JE ( LLTAG(GMB_align_continue) ) /* runin */ #define ONE(x) x #define TWO(x) MAIN ( EDI, ESI ) #undef ONE #undef TWO LLTAG(GMB_align_continue): DEC_L ( ECX ) /* n -= 1 */ INC_L ( EBX ) /* mask += 1 */ ADD_L ( CONST(4), EDI ) /* rgba += 1 */ ADD_L ( CONST(4), ESI ) /* dest += 1 */ LLTAG(GMB_align_end): CMP_L ( CONST(2), ECX) JB ( LLTAG(GMB_loop_end) ) ALIGNTEXT16 LLTAG(GMB_loop_begin): CMP_W ( CONST(0), REGIND(EBX) ) /* *mask == 0 && *(mask + 1) == 0 */ JE ( LLTAG(GMB_loop_continue) ) /* main loop */ #define ONE(x) #define TWO(x) x MAIN ( EDI, ESI ) #undef ONE #undef TWO LLTAG(GMB_loop_continue): DEC_L ( ECX ) DEC_L ( ECX ) /* n -= 2 */ ADD_L ( CONST(2), EBX ) /* mask += 2 */ ADD_L ( CONST(8), EDI ) /* rgba += 2 */ ADD_L ( CONST(8), ESI ) /* dest += 2 */ CMP_L ( CONST(2), ECX ) JAE ( LLTAG(GMB_loop_begin) ) LLTAG(GMB_loop_end): CMP_L ( CONST(1), ECX ) JB ( LLTAG(GMB_done) ) CMP_B ( CONST(0), REGIND(EBX) ) /* *mask == 0 */ JE ( LLTAG(GMB_done) ) /* runout */ #define ONE(x) x #define TWO(x) MAIN ( EDI, ESI ) #undef ONE #undef TWO LLTAG(GMB_done): EMMS LLTAG(GMB_return): POP_L ( EBX ) POP_L ( EDI ) POP_L ( ESI ) MOV_L ( EBP, ESP ) POP_L ( EBP ) RET #undef TAG #undef LLTAG #undef INIT #undef MAIN