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authorRichard Henderson <rth@twiddle.net>2016-06-29 15:52:10 -0700
committerRichard Henderson <rth@twiddle.net>2016-10-26 08:29:00 -0700
commit0846beb36641e8f0c3ee55a5bb84d468b653c852 (patch)
tree13dfb9d1dc6ccf24a068164cac8df599299c044b
parent258dfaaad05a5fbe32a142b794e1df3e16501d0e (diff)
int128: Use __int128 if available
Reviewed-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
-rw-r--r--include/qemu/int128.h135
-rw-r--r--tests/test-int128.c22
2 files changed, 145 insertions, 12 deletions
diff --git a/include/qemu/int128.h b/include/qemu/int128.h
index 52aaf99811..64a7aca604 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_t 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;
+}
+
+static inline uint64_t int128_getlo(Int128 a)
+{
+ return a;
+}
+
+static inline int64_t int128_gethi(Int128 a)
+{
+ return a >> 64;
+}
+
+static inline Int128 int128_zero(void)
+{
+ return 0;
+}
+
+static inline Int128 int128_one(void)
+{
+ return 1;
+}
+
+static inline Int128 int128_2_64(void)
+{
+ return (Int128)1 << 64;
+}
+
+static inline Int128 int128_exts64(int64_t a)
+{
+ return a;
+}
+
+static inline Int128 int128_and(Int128 a, Int128 b)
+{
+ return a & b;
+}
+
+static inline Int128 int128_rshift(Int128 a, int n)
+{
+ return a >> n;
+}
+
+static inline Int128 int128_add(Int128 a, Int128 b)
+{
+ return a + b;
+}
+
+static inline Int128 int128_neg(Int128 a)
+{
+ return -a;
+}
+
+static inline Int128 int128_sub(Int128 a, Int128 b)
+{
+ return a - b;
+}
+
+static inline bool int128_nonneg(Int128 a)
+{
+ return a >= 0;
+}
+
+static inline bool int128_eq(Int128 a, Int128 b)
+{
+ return a == b;
+}
+
+static inline bool int128_ne(Int128 a, Int128 b)
+{
+ return a != b;
+}
+
+static inline bool int128_ge(Int128 a, Int128 b)
+{
+ return a >= b;
+}
+
+static inline bool int128_lt(Int128 a, Int128 b)
+{
+ return a < b;
+}
+
+static inline bool int128_le(Int128 a, Int128 b)
+{
+ return a <= b;
+}
+
+static inline bool int128_gt(Int128 a, Int128 b)
+{
+ return a > b;
+}
+
+static inline bool int128_nz(Int128 a)
+{
+ return a != 0;
+}
+
+static inline Int128 int128_min(Int128 a, Int128 b)
+{
+ return a < b ? a : b;
+}
+
+static inline Int128 int128_max(Int128 a, Int128 b)
+{
+ return a > b ? a : b;
+}
+
+static inline void int128_addto(Int128 *a, Int128 b)
+{
+ *a += b;
+}
+
+static inline void int128_subfrom(Int128 *a, Int128 b)
+{
+ *a -= b;
+}
+
+#else /* !CONFIG_INT128 */
typedef struct Int128 Int128;
@@ -153,4 +285,5 @@ static inline void int128_subfrom(Int128 *a, Int128 b)
*a = int128_sub(*a, b);
}
-#endif
+#endif /* CONFIG_INT128 */
+#endif /* INT128_H */
diff --git a/tests/test-int128.c b/tests/test-int128.c
index 4390123bd3..b86a3c76e6 100644
--- a/tests/test-int128.c
+++ b/tests/test-int128.c
@@ -41,7 +41,7 @@ static Int128 expand(uint32_t x)
uint64_t l, h;
l = expand16(x & 65535);
h = expand16(x >> 16);
- return (Int128) {l, h};
+ return (Int128) int128_make128(l, h);
};
static void test_and(void)
@@ -54,8 +54,8 @@ static void test_and(void)
Int128 b = expand(tests[j]);
Int128 r = expand(tests[i] & tests[j]);
Int128 s = int128_and(a, b);
- g_assert_cmpuint(r.lo, ==, s.lo);
- g_assert_cmpuint(r.hi, ==, s.hi);
+ g_assert_cmpuint(int128_getlo(r), ==, int128_getlo(s));
+ g_assert_cmpuint(int128_gethi(r), ==, int128_gethi(s));
}
}
}
@@ -70,8 +70,8 @@ static void test_add(void)
Int128 b = expand(tests[j]);
Int128 r = expand(tests[i] + tests[j]);
Int128 s = int128_add(a, b);
- g_assert_cmpuint(r.lo, ==, s.lo);
- g_assert_cmpuint(r.hi, ==, s.hi);
+ g_assert_cmpuint(int128_getlo(r), ==, int128_getlo(s));
+ g_assert_cmpuint(int128_gethi(r), ==, int128_gethi(s));
}
}
}
@@ -86,8 +86,8 @@ static void test_sub(void)
Int128 b = expand(tests[j]);
Int128 r = expand(tests[i] - tests[j]);
Int128 s = int128_sub(a, b);
- g_assert_cmpuint(r.lo, ==, s.lo);
- g_assert_cmpuint(r.hi, ==, s.hi);
+ g_assert_cmpuint(int128_getlo(r), ==, int128_getlo(s));
+ g_assert_cmpuint(int128_gethi(r), ==, int128_gethi(s));
}
}
}
@@ -100,8 +100,8 @@ static void test_neg(void)
Int128 a = expand(tests[i]);
Int128 r = expand(-tests[i]);
Int128 s = int128_neg(a);
- g_assert_cmpuint(r.lo, ==, s.lo);
- g_assert_cmpuint(r.hi, ==, s.hi);
+ g_assert_cmpuint(int128_getlo(r), ==, int128_getlo(s));
+ g_assert_cmpuint(int128_gethi(r), ==, int128_gethi(s));
}
}
@@ -180,8 +180,8 @@ test_rshift_one(uint32_t x, int n, uint64_t h, uint64_t l)
{
Int128 a = expand(x);
Int128 r = int128_rshift(a, n);
- g_assert_cmpuint(r.lo, ==, l);
- g_assert_cmpuint(r.hi, ==, h);
+ g_assert_cmpuint(int128_getlo(r), ==, l);
+ g_assert_cmpuint(int128_gethi(r), ==, h);
}
static void test_rshift(void)