include/qemu/host-utils: Remove unused code in the *_overflow wrappers

According to commit cec07c0b612975 the code in the #else paths was required
for GCC < 5.0 and Clang < 3.8. We don't support such old compilers
at all anymore, so we can remove these lines now. We keep the wrapper
function, though, since they are easier to read and help to make sure that
the parameters have the right types.

Message-Id: <20220701025132.303469-1-thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

diff --git a/include/qemu/host-utils.h b/include/qemu/host-utils.h
index bc743f5e32db4a624c2b2a729136c8143251e715..29f3a998788080fb2094168c6eda0d870da4a627 100644 (file)
--- a/include/qemu/host-utils.h
+++ b/include/qemu/host-utils.h
@@ -376,12 +376,7 @@ static inline uint64_t uabs64(int64_t v)
  */
 static inline bool sadd32_overflow(int32_t x, int32_t y, int32_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return ((*ret ^ x) & ~(x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -394,12 +389,7 @@ static inline bool sadd32_overflow(int32_t x, int32_t y, int32_t *ret)
  */
 static inline bool sadd64_overflow(int64_t x, int64_t y, int64_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return ((*ret ^ x) & ~(x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -412,12 +402,7 @@ static inline bool sadd64_overflow(int64_t x, int64_t y, int64_t *ret)
  */
 static inline bool uadd32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return *ret < x;
-#endif
 }
 
 /**
@@ -430,12 +415,7 @@ static inline bool uadd32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
  */
 static inline bool uadd64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return *ret < x;
-#endif
 }
 
 /**
@@ -449,12 +429,7 @@ static inline bool uadd64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
  */
 static inline bool ssub32_overflow(int32_t x, int32_t y, int32_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return ((*ret ^ x) & (x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -468,12 +443,7 @@ static inline bool ssub32_overflow(int32_t x, int32_t y, int32_t *ret)
  */
 static inline bool ssub64_overflow(int64_t x, int64_t y, int64_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return ((*ret ^ x) & (x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -487,12 +457,7 @@ static inline bool ssub64_overflow(int64_t x, int64_t y, int64_t *ret)
  */
 static inline bool usub32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return x < y;
-#endif
 }
 
 /**
@@ -506,12 +471,7 @@ static inline bool usub32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
  */
 static inline bool usub64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return x < y;
-#endif
 }
 
 /**
@@ -524,13 +484,7 @@ static inline bool usub64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
  */
 static inline bool smul32_overflow(int32_t x, int32_t y, int32_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    int64_t z = (int64_t)x * y;
-    *ret = z;
-    return *ret != z;
-#endif
 }
 
 /**
@@ -543,14 +497,7 @@ static inline bool smul32_overflow(int32_t x, int32_t y, int32_t *ret)
  */
 static inline bool smul64_overflow(int64_t x, int64_t y, int64_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    uint64_t hi, lo;
-    muls64(&lo, &hi, x, y);
-    *ret = lo;
-    return hi != ((int64_t)lo >> 63);
-#endif
 }
 
 /**
@@ -563,13 +510,7 @@ static inline bool smul64_overflow(int64_t x, int64_t y, int64_t *ret)
  */
 static inline bool umul32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    uint64_t z = (uint64_t)x * y;
-    *ret = z;
-    return z > UINT32_MAX;
-#endif
 }
 
 /**
@@ -582,13 +523,7 @@ static inline bool umul32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
  */
 static inline bool umul64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    uint64_t hi;
-    mulu64(ret, &hi, x, y);
-    return hi != 0;
-#endif
 }
 
 /*