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Re-enable trace stitching.

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Thanks to Vyacheslav Egorov.
This commit is contained in:
Mike Pall
2015-08-29 23:22:29 +02:00
parent ad29314c2c
commit a3a6866d4c
13 changed files with 60 additions and 84 deletions
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13
src/vm_arm.dasc
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@@ -2086,7 +2086,7 @@ static void build_subroutines(BuildCtx *ctx)
| // RA = resultptr, CARG4 = meta base
| ldr RB, SAVE_MULTRES
| ldr INS, [PC, #-4]
| ldr CARG3, [CARG4, #-24] // Save previous trace number.
| ldr TRACE:CARG3, [CARG4, #-24] // Save previous trace.
| subs RB, RB, #8
| decode_RA8 RC, INS // Call base.
| beq >2
@@ -2101,23 +2101,20 @@ static void build_subroutines(BuildCtx *ctx)
| decode_RA8 RA, INS
| decode_RB8 RB, INS
| add RA, RA, RB
| ldr CARG1, [DISPATCH, #DISPATCH_J(trace)]
|3:
| cmp RA, RC
| mvn CARG2, #~LJ_TNIL
| bhi >9 // More results wanted?
|
| ldr TRACE:RA, [CARG1, CARG3, lsl #2]
| cmp TRACE:RA, #0
| beq ->cont_nop
| ldrh RC, TRACE:RA->link
| cmp RC, CARG3
| ldrh RA, TRACE:CARG3->traceno
| ldrh RC, TRACE:CARG3->link
| cmp RC, RA
| beq ->cont_nop // Blacklisted.
| cmp RC, #0
| bne =>BC_JLOOP // Jump to stitched trace.
|
| // Stitch a new trace to the previous trace.
| str CARG3, [DISPATCH, #DISPATCH_J(exitno)]
| str RA, [DISPATCH, #DISPATCH_J(exitno)]
| str L, [DISPATCH, #DISPATCH_J(L)]
| str BASE, L->base
| sub CARG1, DISPATCH, #-GG_DISP2J