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PPC: Add helper function for folding arithmetic ops.

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Mike Pall 2010-09-08 00:14:36 +02:00
parent 932193baa6
commit b2aa08c75c
1 changed files with 27 additions and 1 deletions
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28
src/buildvm_ppc.dasc
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@ -981,7 +981,33 @@ static void build_subroutines(BuildCtx *ctx)
|// Compute x op y for basic arithmetic operators (+ - * / % ^ and unary -)
|// and basic math functions. ORDER ARITH
|->vm_foldarith:
| NYI
| evmergelo CARG2, CARG1, CARG2
| cmplwi CARG5, 1
| evmergelo CARG4, CARG3, CARG4
| beq >1; bgt >2
| efdadd CRET2, CARG2, CARG4; evmergehi CRET1, CRET2, CRET2; blr
|1:
| efdsub CRET2, CARG2, CARG4; evmergehi CRET1, CRET2, CRET2; blr
|2:
| cmplwi CARG5, 3; beq >1; bgt >2
| efdmul CRET2, CARG2, CARG4; evmergehi CRET1, CRET2, CRET2; blr
|1:
| efddiv CRET2, CARG2, CARG4; evmergehi CRET1, CRET2, CRET2; blr
|2:
| cmplwi CARG5, 5; beq >1; bgt >2
| evmr CARG3, CARG2; efddiv CRET2, CARG2, CARG4
| mflr SAVE0; bl ->vm_floor; mtlr SAVE0
| efdmul CRET2, CRET2, CARG4; efdsub CRET2, CARG3, CRET2
| evmergehi CRET1, CRET2, CRET2; blr
|1:
| b extern pow
|2:
| cmplwi CARG5, 7; beq >1; bgt >2
| xoris CARG1, CARG1, 0x8000; blr
|1:
| rlwinm CARG1, CARG1, 0, 1, 31; blr
|2:
| NYI // Other operations only needed by JIT compiler.
|
|//-----------------------------------------------------------------------
|//-- Miscellaneous functions --------------------------------------------