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PPC: Add coroutine.resume/wrap_aux/yield() fast functions.

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Mike Pall 2010-10-07 02:16:44 +02:00
parent 9f14e03d6e
commit 9d201c972a
1 changed files with 122 additions and 2 deletions
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124
src/buildvm_ppc.dasc
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@ -1192,17 +1192,137 @@ static void build_subroutines(BuildCtx *ctx)
|.macro coroutine_resume_wrap, resume
|.if resume
|.ffunc_1 coroutine_resume
| evmergehi TMP0, L:CARG1, L:CARG1
|.else
|.ffunc coroutine_wrap_aux
| lwz L:CARG1, CFUNC:RB->upvalue[0].gcr
|.endif
| NYI
|.if resume
| cmpwi TMP0, LJ_TTHREAD
| bne ->fff_fallback
|.endif
| lbz TMP0, L:CARG1->status
| lwz TMP1, L:CARG1->cframe
| lwz CARG2, L:CARG1->top
| cmplwi cr0, TMP0, LUA_YIELD
| lwz TMP2, L:CARG1->base
| cmplwi cr1, TMP1, 0
| lwz TMP0, L:CARG1->maxstack
| cmplw cr7, CARG2, TMP2
| lwz PC, FRAME_PC(BASE)
| crorc 4*cr6+lt, 4*cr0+gt, 4*cr1+eq // st>LUA_YIELD || cframe!=0
| add TMP2, CARG2, NARGS8:RC
| crandc 4*cr6+gt, 4*cr7+eq, 4*cr0+eq // base==top && st!=LUA_YIELD
| cmplw cr1, TMP2, TMP0
| cror 4*cr6+lt, 4*cr6+lt, 4*cr6+gt
| stw PC, SAVE_PC
| cror 4*cr6+lt, 4*cr6+lt, 4*cr1+gt // cond1 || cond2 || stackov
| stw BASE, L->base
| blt cr6, ->fff_fallback
|1:
|.if resume
| addi BASE, BASE, 8 // Keep resumed thread in stack for GC.
| subi NARGS8:RC, NARGS8:RC, 8
| subi TMP2, TMP2, 8
|.endif
| stw TMP2, L:CARG1->top
| li TMP1, 0
| stw BASE, L->top
|2: // Move args to coroutine.
| cmpw TMP1, NARGS8:RC
| evlddx TMP0, BASE, TMP1
| beq >3
| evstddx TMP0, CARG2, TMP1
| addi TMP1, TMP1, 8
| b <2
|3:
| li CARG3, 0
| mr L:SAVE0, L:CARG1
| li CARG4, 0
| bl ->vm_resume // (lua_State *L, TValue *base, 0, 0)
| // Returns thread status.
|4:
| lwz TMP2, L:SAVE0->base
| cmplwi CRET1, LUA_YIELD
| lwz TMP3, L:SAVE0->top
| li_vmstate INTERP
| lwz BASE, L->base
| st_vmstate
| bgt >8
| sub RD, TMP3, TMP2
| lwz TMP0, L->maxstack
| cmplwi RD, 0
| add TMP1, BASE, RD
| beq >6 // No results?
| cmplw TMP1, TMP0
| li TMP1, 0
| bgt >9 // Need to grow stack?
|
| subi TMP3, RD, 8
| stw TMP2, L:SAVE0->top // Clear coroutine stack.
|5: // Move results from coroutine.
| cmplw TMP1, TMP3
| evlddx TMP0, TMP2, TMP1
| evstddx TMP0, BASE, TMP1
| addi TMP1, TMP1, 8
| bne <5
|6:
| andi. TMP0, PC, FRAME_TYPE
|.if resume
| li TMP1, LJ_TTRUE
| la RA, -8(BASE)
| stw TMP1, -8(BASE) // Prepend true to results.
| addi RD, RD, 16
|.else
| mr RA, BASE
| addi RD, RD, 8
|.endif
|7:
| stw PC, SAVE_PC
| mr MULTRES, RD
| beq ->BC_RET_Z
| b ->vm_return
|
|8: // Coroutine returned with error (at co->top-1).
|.if resume
| andi. TMP0, PC, FRAME_TYPE
| la TMP3, -8(TMP3)
| li TMP1, LJ_TFALSE
| evldd TMP0, 0(TMP3)
| stw TMP3, L:SAVE0->top // Remove error from coroutine stack.
| li RD, (2+1)*8
| stw TMP1, -8(BASE) // Prepend false to results.
| la RA, -8(BASE)
| evstdd TMP0, 0(BASE) // Copy error message.
| b <7
|.else
| mr CARG1, L
| mr CARG2, L:SAVE0
| bl extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co)
|.endif
|
|9: // Handle stack expansion on return from yield.
| mr CARG1, L
| srwi CARG2, RD, 3
| bl extern lj_state_growstack // (lua_State *L, int n)
| li CRET1, 0
| b <4
|.endmacro
|
| coroutine_resume_wrap 1 // coroutine.resume
| coroutine_resume_wrap 0 // coroutine.wrap
|
|.ffunc coroutine_yield
| NYI
| lwz TMP0, L->cframe
| add TMP1, BASE, NARGS8:RC
| stw BASE, L->base
| andi. TMP0, TMP0, CFRAME_RESUME
| stw TMP1, L->top
| li CRET1, LUA_YIELD
| beq ->fff_fallback
| stw ZERO, L->cframe
| stb CRET1, L->status
| b ->vm_leave_unw
|
|//-- Math library -------------------------------------------------------
|