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-rw-r--r--amd64/include/u.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/amd64/include/u.h b/amd64/include/u.h
index 3ca236942..17a684368 100644
--- a/amd64/include/u.h
+++ b/amd64/include/u.h
@@ -20,6 +20,10 @@ typedef unsigned char u8int;
typedef unsigned short u16int;
typedef unsigned int u32int;
typedef unsigned long long u64int;
+typedef signed char s8int;
+typedef signed short s16int;
+typedef signed int s32int;
+typedef signed long long s64int;
/* MXCSR */
/* fcr */