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ARM: Add getmetatable(), setmetatable() and tonumber() fast functions.

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Mike Pall 2011-04-08 02:42:04 +02:00
parent 0046f955eb
commit 1f4f805c96
1 changed files with 58 additions and 4 deletions
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62
src/buildvm_arm.dasc
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@ -723,18 +723,72 @@ static void build_subroutines(BuildCtx *ctx)
|//-- Base library: getters and setters --------------------------------- |//-- Base library: getters and setters ---------------------------------
| |
|.ffunc_1 getmetatable |.ffunc_1 getmetatable
| NYI | checktp CARG2, LJ_TTAB
| cmnne CARG2, #-LJ_TUDATA
| bne >6
|1: // Field metatable must be at same offset for GCtab and GCudata!
| ldr TAB:RB, TAB:CARG1->metatable
|2:
| mvn CARG2, #~LJ_TNIL
| ldr STR:RC, [DISPATCH, #DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])]
| cmp TAB:RB, #0
| beq ->fff_restv
| ldr CARG3, TAB:RB->hmask
| ldr CARG4, STR:RC->hash
| ldr NODE:INS, TAB:RB->node
| and CARG3, CARG3, CARG4 // idx = str->hash & tab->hmask
| add CARG3, CARG3, CARG3, lsl #1
| add NODE:INS, NODE:INS, CARG3, lsl #3 // node = tab->node + idx*3*8
|3: // Rearranged logic, because we expect _not_ to find the key.
| ldrd CARG34, NODE:INS->key // STALL: early NODE:INS.
| ldrd CARG12, NODE:INS->val
| ldr NODE:INS, NODE:INS->next
| cmp CARG3, STR:RC
| checktpeq CARG4, LJ_TSTR
| beq >5
| cmp NODE:INS, #0
| bne <3
|4:
| mov CARG1, RB // Use metatable as default result.
| mvn CARG2, #~LJ_TTAB
| b ->fff_restv
|5:
| checktp CARG2, LJ_TNIL
| bne ->fff_restv
| b <4
|
|6:
| checktp CARG2, LJ_TISNUM
| mvnhs CARG2, CARG2
| movlo CARG2, #~LJ_TISNUM
| add CARG4, DISPATCH, CARG2, lsl #2
| ldr TAB:RB, [CARG4, #DISPATCH_GL(gcroot[GCROOT_BASEMT])]
| b <2
| |
|.ffunc_2 setmetatable |.ffunc_2 setmetatable
| NYI | // Fast path: no mt for table yet and not clearing the mt.
| checktp CARG2, LJ_TTAB
| ldreq TAB:RB, TAB:CARG1->metatable
| checktpeq CARG4, LJ_TTAB
| ldrbeq CARG4, TAB:CARG1->marked
| cmpeq TAB:RB, #0
| bne ->fff_fallback
| tst CARG4, #LJ_GC_BLACK // isblack(table)
| str TAB:CARG3, TAB:CARG1->metatable
| beq ->fff_restv
| barrierback TAB:CARG1, CARG4, CARG3
| b ->fff_restv
| |
|.ffunc rawget |.ffunc rawget
| NYI | NYI
| |
|//-- Base library: conversions ------------------------------------------ |//-- Base library: conversions ------------------------------------------
| |
|.ffunc tonumber |.ffunc_1 tonumber
| NYI | // Only handles the number case inline (without a base argument).
| checktp CARG2, LJ_TISNUM
| bls ->fff_restv
| b ->fff_fallback
| |
|.ffunc_1 tostring |.ffunc_1 tostring
| // Only handles the string or number case inline. | // Only handles the string or number case inline.