Kyle Isom
c13c868e77
Vendor dependencies and expose mcproxyctl binary via nix build. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
30 lines
697 B
ArmAsm
30 lines
697 B
ArmAsm
#include "textflag.h"
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// func callStrtod(fn uintptr, s uintptr, p uintptr) float64
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TEXT ·callStrtod(SB), NOSPLIT, $0
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// 1. Initialize FPU
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// This ensures the x87 stack is empty (Tag Word = FFFF).
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// Without this, garbage on the stack causes the result push to overflow -> NaN.
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FINIT
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// 2. Load arguments from Go stack
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MOVL fn+0(FP), AX // Function pointer
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MOVL s+4(FP), CX // String pointer
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MOVL p+8(FP), DX // Endptr pointer
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// 3. Setup C stack for __cdecl
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SUBL $8, SP
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MOVL DX, 4(SP) // Push endptr
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MOVL CX, 0(SP) // Push str
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// 4. Call the C function
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CALL AX
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// 5. Clean up stack
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ADDL $8, SP
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// 6. Store FPU result (ST0) into Go return slot
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FMOVD F0, ret+12(FP)
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RET
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