Add build system scaffolding and libc headers

1 files changed, 34 insertions, 0 deletions

diff --git a/include/arch/x86_64/bits/fenv.h b/include/arch/x86_64/bits/fenv.h
new file mode 100644
index 00000000..40bc9e25
--- /dev/null
+++ b/include/arch/x86_64/bits/fenv.h
@@ -0,0 +1,34 @@
+#define FE_INVALID   1
+#define __FE_DENORM  2
+#define FE_DIVBYZERO 4
+#define FE_OVERFLOW  8
+#define FE_UNDERFLOW 16
+#define FE_INEXACT   32
+
+#define FE_ALL_EXCEPT 63
+
+#define FE_TONEAREST  0
+#define FE_DOWNWARD   0x400
+#define FE_UPWARD     0x800
+#define FE_TOWARDZERO 0xc00
+
+typedef unsigned short fexcept_t;
+
+typedef struct {
+	unsigned short __control_word;
+	unsigned short __unused1;
+	unsigned short __status_word;
+	unsigned short __unused2;
+	unsigned short __tags;
+	unsigned short __unused3;
+	unsigned int __eip;
+	unsigned short __cs_selector;
+	unsigned int __opcode : 11;
+	unsigned int __unused4 : 5;
+	unsigned int __data_offset;
+	unsigned short __data_selector;
+	unsigned short __unused5;
+	unsigned int __mxcsr;
+} fenv_t;
+
+#define FE_DFL_ENV ((const fenv_t *)-1)