| // Test result extraction of mac instructions. | |
| // Test basic edge values | |
| // UNSIGNED FRACTIONAL mode into SINGLE destination register | |
| // test ops: "+=" | |
| # mach: bfin | |
| .include "testutils.inc" | |
| start | |
| // load r0=0x80000001 | |
| // load r1=0x80007fff | |
| // load r2=0xf000ffff | |
| // load r3=0x0000007f | |
| // load r4=0x00000080 | |
| loadsym P0, data0; | |
| R0 = [ P0 ++ ]; | |
| R1 = [ P0 ++ ]; | |
| R2 = [ P0 ++ ]; | |
| R3 = [ P0 ++ ]; | |
| R4 = [ P0 ++ ]; | |
| // extraction with no saturation (truncate) | |
| // 0x8000 * 0x7fff = 0x003fff8000 -> 0x3fff | |
| A1 = A0 = 0; | |
| R5.H = (A1 += R0.H * R1.L), R5.L = (A0 += R0.H * R1.L) (TFU); | |
| DBGA ( R5.L , 0x3fff ); | |
| DBGA ( R5.H , 0x3fff ); | |
| // extraction with no saturation (round) | |
| // 0x8000 * 0x7fff = 0x003fff8000 -> 0x4000 | |
| A1 = A0 = 0; | |
| R5.H = (A1 += R0.H * R1.L), R5.L = (A0 += R0.H * R1.L) (FU); | |
| DBGA ( R5.L , 0x4000 ); | |
| DBGA ( R5.H , 0x4000 ); | |
| // extraction with no saturation | |
| // 0xffff * 0xffff = 0x00fffe0001 -> 0xfffe | |
| A1 = A0 = 0; | |
| R5.H = (A1 += R2.L * R2.L), R5.L = (A0 += R2.L * R2.L) (FU); | |
| DBGA ( R5.L , 0xfffe ); | |
| DBGA ( R5.H , 0xfffe ); | |
| // extraction with saturation | |
| //0x7ffffe0001 -> 0xffff | |
| A1 = A0 = 0; | |
| A1.x = R3.L; | |
| A0.x = R3.L; | |
| R5.H = (A1 += R2.L * R2.L), R5.L = (A0 += R2.L * R2.L) (FU); | |
| DBGA ( R5.L , 0xffff ); | |
| DBGA ( R5.H , 0xffff ); | |
| pass | |
| .data | |
| data0: | |
| .dw 0x0001 | |
| .dw 0x8000 | |
| .dw 0x7fff | |
| .dw 0x8000 | |
| .dw 0xffff | |
| .dw 0xf000 | |
| .dw 0x007f | |
| .dw 0x0000 | |
| .dw 0x0080 | |
| .dw 0x0000 |