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Unify Lua number to FFI integer conversions.

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Phew. #1411
This commit is contained in:
Mike Pall
2025-11-27 17:45:17 +01:00
parent 3215838aa7
commit f80b349d54
41 changed files with 1070 additions and 434 deletions
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36
src/vm_arm64.dasc
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@@ -2156,6 +2156,42 @@ static void build_subroutines(BuildCtx *ctx)
| ret
|
|//-----------------------------------------------------------------------
|//-- Number conversion functions ----------------------------------------
|//-----------------------------------------------------------------------
|
|// int64_t lj_vm_num2int_check(double x)
|->vm_num2int_check:
| fcvtzs CRET1w, FARG1
| scvtf FARG2, CRET1w
| fcmp FARG2, FARG1
| bne >1
| ret
|1:
| mov CRET1, #0x8000000080000000
| ret
|
|// int64_t lj_vm_num2i64(double x)
|->vm_num2i64:
| fcvtzs CRET1, FARG1
| ret
|
|// uint64_t lj_vm_num2u64(double x)
|->vm_num2u64:
| fcvtzs CRET1, FARG1
| fcvtzu CARG2, FARG1
| cmn CRET1, #1 // Set overflow if CRET1 == INT64_MAX.
| csel CRET1, CRET1, CARG2, vc // No overflow ? i64 : u64.
| ret
|
|// int32_t lj_vm_tobit(double x)
|->vm_tobit:
| movz CRET1, #0x4338, lsl #48 // 2^52 + 2^51.
| fmov FARG2, CRET1
| fadd FARG1, FARG1, FARG2
| fmov CRET1w, s0
| ret
|
|//-----------------------------------------------------------------------
|//-- Miscellaneous functions --------------------------------------------
|//-----------------------------------------------------------------------
|