| buzbee | 1452bee | 2015-03-06 14:43:04 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Generic 32-bit floating-point operation. Provide an "instr" line that |
| 3 | * specifies an instruction that performs "s2 = s0 op s1". Because we |
| 4 | * use the "softfp" ABI, this must be an instruction, not a function call. |
| 5 | * |
| 6 | * For: add-float, sub-float, mul-float, div-float |
| 7 | */ |
| 8 | /* floatop vAA, vBB, vCC */ |
| 9 | FETCH r0, 1 @ r0<- CCBB |
| 10 | mov r9, rINST, lsr #8 @ r9<- AA |
| 11 | mov r3, r0, lsr #8 @ r3<- CC |
| 12 | and r2, r0, #255 @ r2<- BB |
| 13 | VREG_INDEX_TO_ADDR r3, r3 @ r3<- &vCC |
| 14 | VREG_INDEX_TO_ADDR r2, r2 @ r2<- &vBB |
| 15 | flds s1, [r3] @ s1<- vCC |
| 16 | flds s0, [r2] @ s0<- vBB |
| 17 | |
| 18 | FETCH_ADVANCE_INST 2 @ advance rPC, load rINST |
| 19 | $instr @ s2<- op |
| 20 | GET_INST_OPCODE ip @ extract opcode from rINST |
| 21 | VREG_INDEX_TO_ADDR r9, r9 @ r9<- &vAA |
| 22 | fsts s2, [r9] @ vAA<- s2 |
| 23 | GOTO_OPCODE ip @ jump to next instruction |