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Add trace stitching.

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This commit is contained in:
Mike Pall
2013-12-25 02:55:25 +01:00
parent 6e02c210c4
commit b5d741fa7e
17 changed files with 422 additions and 69 deletions
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58
src/vm_mips.dasc
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@@ -2011,6 +2011,60 @@ static void build_subroutines(BuildCtx *ctx)
| jr CRET1
|. lw INS, -4(PC)
|
|->cont_stitch: // Trace stitching.
|.if JIT
| // RA = resultptr, RB = meta base
| lw INS, -4(PC)
| lw TMP3, -24+LO(RB) // Save previous trace number.
| decode_RA8a RC, INS
| addiu AT, MULTRES, -8
| decode_RA8b RC
| beqz AT, >2
|. addu RC, BASE, RC // Call base.
|1: // Move results down.
| ldc1 f0, 0(RA)
| addiu AT, AT, -8
| addiu RA, RA, 8
| sdc1 f0, 0(RC)
| bnez AT, <1
|. addiu RC, RC, 8
|2:
| decode_RA8a RA, INS
| decode_RB8a RB, INS
| decode_RA8b RA
| decode_RB8b RB
| addu RA, RA, RB
| lw TMP1, DISPATCH_J(trace)(DISPATCH)
| addu RA, BASE, RA
|3:
| sltu AT, RC, RA
| bnez AT, >9 // More results wanted?
|. sll TMP2, TMP3, 2
|
| addu TMP2, TMP1, TMP2
| lw TRACE:TMP2, 0(TMP2)
| lhu RD, TRACE:TMP2->link
| beq RD, TMP3, ->cont_nop // Blacklisted.
|. load_got lj_dispatch_stitch
| bnez RD, =>BC_JLOOP // Jump to stitched trace.
|. sll RD, RD, 3
|
| // Stitch a new trace to the previous trace.
| sw TMP3, DISPATCH_J(exitno)(DISPATCH)
| sw L, DISPATCH_J(L)(DISPATCH)
| sw BASE, L->base
| addiu CARG1, DISPATCH, GG_DISP2J
| call_intern lj_dispatch_stitch // (jit_State *J, const BCIns *pc)
|. move CARG2, PC
| b ->cont_nop
|. lw BASE, L->base
|
|9:
| sw TISNIL, HI(RC)
| b <3
|. addiu RC, RC, 8
|.endif
|
|->vm_profhook: // Dispatch target for profiler hook.
#if LJ_HASPROFILE
| load_got lj_dispatch_profile
@@ -2091,13 +2145,13 @@ static void build_subroutines(BuildCtx *ctx)
| sw BASE, L->base
|1:
| bltz CRET1, >3 // Check for error from exit.
|. lw LFUNC:TMP1, FRAME_FUNC(BASE)
|. lw LFUNC:RB, FRAME_FUNC(BASE)
| lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float).
| sll MULTRES, CRET1, 3
| li TISNIL, LJ_TNIL
| sw MULTRES, SAVE_MULTRES
| mtc1 TMP3, TOBIT
| lw TMP1, LFUNC:TMP1->pc
| lw TMP1, LFUNC:RB->pc
| sw r0, DISPATCH_GL(jit_base)(DISPATCH)
| lw KBASE, PC2PROTO(k)(TMP1)
| cvt.d.s TOBIT, TOBIT