Fixes for Windows ARM64 (#251)

* aarch64_fpmath.h: deal with LLP64 (Windows ARM64)

use uint64_t instead of unsigned long, as unsigned long is only 32 bits on Windows

* Make.inc: WINNT aarch64 long double is double

Add to list along with Darwin

Author: jeremyd2019

Make.inc

@@ -151,7 +151,7 @@ ifneq ($(filter $(ARCH),i387 amd64),)
 # `long double` is the same as `double`. 
 LONG_DOUBLE_NOT_DOUBLE := 1
 else ifeq ($(ARCH), aarch64)
-ifneq ($(OS),Darwin)
+ifeq ($(filter $(OS),Darwin WINNT),)
 LONG_DOUBLE_NOT_DOUBLE := 1
 endif
 endif

src/aarch64_fpmath.h

@@ -30,15 +30,15 @@
 union IEEEl2bits {
 	long double	e;
 	struct {
-		unsigned long	manl	:64;
-		unsigned long	manh	:48;
+		uint64_t	manl	:64;
+		uint64_t	manh	:48;
 		unsigned int	exp	:15;
 		unsigned int	sign	:1;
 	} bits;
 	/* TODO andrew: Check the packing here */
 	struct {
-		unsigned long	manl	:64;
-		unsigned long	manh	:48;
+		uint64_t	manl	:64;
+		uint64_t	manh	:48;
 		unsigned int	expsign	:16;
 	} xbits;
 };