Add build system scaffolding and libc headers

1 files changed, 33 insertions, 0 deletions

diff --git a/include/arch/x86_64/asm/fpmath.h b/include/arch/x86_64/asm/fpmath.h
new file mode 100644
index 00000000..43ee6cfb
--- /dev/null
+++ b/include/arch/x86_64/asm/fpmath.h
@@ -0,0 +1,33 @@
+#ifndef __ASM_FPMATH_H
+#define __ASM_FPMATH_H
+
+union l2bits {
+	long double e;
+	struct {
+		unsigned int manl : 32;
+		unsigned int manh : 32;
+		unsigned int exp : 15;
+		unsigned int sign : 1;
+		unsigned int junkl : 16;
+		unsigned int junkh : 32;
+	} bits;
+	struct {
+		unsigned long man : 64;
+		unsigned int expsign : 16;
+		unsigned long junk : 48;
+	} xbits;
+};
+
+#define LDBL_NBIT      0x80000000
+#define mask_nbit_l(u) ((u).bits.manh &= ~LDBL_NBIT)
+
+#define LDBL_MANH_SIZE 32
+#define LDBL_MANL_SIZE 32
+
+#define LDBL_TO_ARRAY32(u, a)                     \
+	do {                                      \
+		(a)[0] = (uint32_t)(u).bits.manl; \
+		(a)[1] = (uint32_t)(u).bits.manh; \
+	} while (0)
+
+#endif