| buzbee | 1452bee | 2015-03-06 14:43:04 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Generic one-operand compare-and-branch operation. Provide a "revcmp" |
| 3 | * fragment that specifies the *reverse* comparison to perform, e.g. |
| 4 | * for "if-le" you would use "gt". |
| 5 | * |
| 6 | * for: if-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez |
| 7 | */ |
| 8 | /* if-cmp vAA, +BBBB */ |
| buzbee | 1452bee | 2015-03-06 14:43:04 -0800 | [diff] [blame] | 9 | mov r0, rINST, lsr #8 @ r0<- AA |
| 10 | GET_VREG r2, r0 @ r2<- vAA |
| Bill Buzbee | fd522f9 | 2016-02-11 22:37:42 +0000 | [diff] [blame] | 11 | FETCH_S rINST, 1 @ rINST<- branch offset, in code units |
| 12 | ldr lr, [rSELF, #THREAD_FLAGS_OFFSET] |
| buzbee | 1452bee | 2015-03-06 14:43:04 -0800 | [diff] [blame] | 13 | cmp r2, #0 @ compare (vA, 0) |
| buzbee | f1dcacc | 2016-02-24 14:24:24 -0800 | [diff] [blame^] | 14 | mov${revcmp} rINST, #2 |
| 15 | #if MTERP_PROFILE_BRANCHES |
| 16 | @ TUNING: once measurements are complete, remove #if and hand-schedule. |
| Bill Buzbee | fd522f9 | 2016-02-11 22:37:42 +0000 | [diff] [blame] | 17 | EXPORT_PC |
| 18 | mov r0, rSELF |
| 19 | add r1, rFP, #OFF_FP_SHADOWFRAME |
| 20 | mov r2, rINST |
| 21 | bl MterpProfileBranch @ (self, shadow_frame, offset) |
| 22 | cmp r0, #0 |
| 23 | bne MterpOnStackReplacement @ Note: offset must be in rINST |
| buzbee | 1452bee | 2015-03-06 14:43:04 -0800 | [diff] [blame] | 24 | #endif |
| buzbee | f1dcacc | 2016-02-24 14:24:24 -0800 | [diff] [blame^] | 25 | adds r1, rINST, rINST @ convert to bytes & set flags |
| 26 | FETCH_ADVANCE_INST_RB r1 @ update rPC, load rINST |
| 27 | bmi MterpCheckSuspendAndContinue |
| 28 | GET_INST_OPCODE ip @ extract opcode from rINST |
| 29 | GOTO_OPCODE ip @ jump to next instruction |