| // 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 |
