syscall

func CallNFloat ¶ added in v0.4.1

func CallNFloat(fn uintptr, gpr [6]uintptr, sse [8]float64, stackArgs [9]uintptr, numStack int) (r1 uintptr, r2 uintptr, f1 float64)

CallNFloat calls a C function with up to 6 integer register arguments, 8 SSE arguments, and 9 stack-spill arguments (15 total).

gpr: first 6 GP register values (RDI, RSI, RDX, RCX, R8, R9) sse: 8 SSE register values (XMM0-XMM7) as float64 bit patterns stackArgs: additional arguments to push onto the stack before CALL numStack: how many entries in stackArgs are valid (0-9)

Returns:

• r1: RAX integer return value
• r2: RDX second integer return value (9-16 byte struct returns)
• f1: XMM0 float return value (bit pattern)