two calls to external lib in one FFI call using NativeBoost

test3

"__gmpz_add (mpz_t gmpz, mpz_t op1, mpz_t op2)"
	<primitive: #primitiveNativeCall module: #NativeBoostPlugin>

	^ NBFFICallout cdecl: #( void (mpz_t gmpz, mpz_t gmpz, mpz_t gmpz, ))
	emitCall: [:gen | | asm  proxy gmpzAddFcnPtr sa sb sc|
		asm := gen asm.
		proxy := gen proxy.


        	sa := gen reserveTemp.
       	sb := gen reserveTemp.
        	sc := gen reserveTemp.

		"save args"
       	 asm
          		 mov: asm ESP ptr to:  asm EAX;
             	mov: asm EAX to: sa;   "a -> sa "
            	mov: asm ESP ptr + 4 to: asm EAX;
			mov: asm EAX to: sb;  "b -> sb"
			mov: asm ESP ptr + 8 to: asm EAX;
			mov: asm EAX to: sc . "c -> sc"


		gmpzAddFcnPtr := self nbGetSymbolAddress: '__gmpz_add' module:self nbLibraryNameOrHandle.
		  asm mov: gmpzAddFcnPtr asUImm to: asm EAX.
   		asm call: asm EAX.

		asm cdeclCall: [:call |

	"push function arguments (note, cdecl push order is from right to left )"
		asm
			push: sc;
           		push: sb;
			push: sa.


		"get a function addres"
   		gmpzAddFcnPtr := self nbGetSymbolAddress: '__gmpz_add' module:self nbLibraryNameOrHandle.


		"put a function address into EAX, and call function"

  		 asm mov: gmpzAddFcnPtr asUImm to: asm EAX.
   		asm call: asm EAX.


	] alignment: gen stackAlignment .

	]