| /* |
| * Written by José Fonseca <j_r_fonseca@yahoo.co.uk> |
| */ |
| |
| |
| /* |
| * void _mesa_mmx_blend( GLcontext *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 |
