On 09/09/2016 10:19 AM, Alex Bennée wrote:
Richard Henderson <r...@twiddle.net> writes:
Signed-off-by: Richard Henderson <r...@twiddle.net>
---
include/qemu/int128.h | 135 +++++++++++++++++++++++++++++++++++++++++++++++++-
tests/test-int128.c | 22 ++++----
2 files changed, 145 insertions(+), 12 deletions(-)
diff --git a/include/qemu/int128.h b/include/qemu/int128.h
index 52aaf99..08f1db1 100644
--- a/include/qemu/int128.h
+++ b/include/qemu/int128.h
@@ -1,6 +1,138 @@
#ifndef INT128_H
#define INT128_H
+#ifdef CONFIG_INT128
+
+typedef __int128 Int128;
+
+static inline Int128 int128_make64(uint64_t a)
+{
+ return a;
+}
+
+static inline uint64_t int128_get64(Int128 a)
+{
+ uint64_t r = a;
+ assert(r == a);
+ return r;
+}
So is _get64 just an alias for getlo? It looks fragile for the time
someone has a > 64 bit number stuffed in before they fetch it.
You'll note that this interface is not my invention. However...
It's asserting that we *don't* have a > 64 bit number stuffed in. Prior to me
adding make_int128, the only way to get a > 64 bit number was via arithmetic.
r~
