diff --git a/gcc/match-sat-alu.pd b/gcc/match-sat-alu.pd
index 8c7bc0782a0..dfb2eb9800f 100644
--- a/gcc/match-sat-alu.pd
+++ b/gcc/match-sat-alu.pd
@@ -131,6 +131,15 @@ along with GCC; see the file COPYING3.  If not see
   /* SAT_U_SUB = (X - Y) * (X >= Y)  */
   (mult:c (minus @0 @1) (convert (ge @0 @1)))
   (if (types_match (type, @0, @1))))
+ /* The wrapped difference exceeds the minuend exactly when the subtraction
+    borrows, so a source that names the difference and then tests it against
+    the minuend is a saturating subtract.  */
+ (match (unsigned_integer_sat_sub @0 @1)
+  /* SAT_U_SUB = (X - Y) > X ? 0 : X - Y, and the commuted comparison.  */
+  (cond^ (gt:c (minus@2 @0 @1) @0) integer_zerop @2))
+ (match (unsigned_integer_sat_sub @0 @1)
+  /* SAT_U_SUB = (X - Y) <= X ? X - Y : 0, and the commuted comparison.  */
+  (cond^ (le:c (minus@2 @0 @1) @0) @2 integer_zerop))
  (match (unsigned_integer_sat_sub @0 @1)
   /* SAT_U_SUB = X - MIN (X, Y).  The MIN has to be single use: while it
      stays live the saturating subtract is computed beside it instead of
diff --git a/gcc/testsuite/gcc.target/aarch64/sat_u_sub_borrow-1.c b/gcc/testsuite/gcc.target/aarch64/sat_u_sub_borrow-1.c
new file mode 100644
index 00000000000..8b86cb92922
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sat_u_sub_borrow-1.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+typedef unsigned long long u64;
+
+/* The wrapped difference is larger than the minuend exactly when the
+   subtraction borrowed, so each of these is a saturating subtract.  */
+
+#define DEF(N, T)						\
+  T f1_##N (T a, T b) { T r = a - b; return r > a ? 0 : r; }	\
+  T f2_##N (T a, T b) { T r = a - b; if (r > a) r = 0; return r; } \
+  T f3_##N (T a, T b) { T r = a - b; return r <= a ? r : 0; }
+
+DEF (8, u8)
+DEF (16, u16)
+DEF (32, u32)
+DEF (64, u64)
+
+/* { dg-final { scan-tree-dump-times "\\.SAT_SUB " 12 "optimized" } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/saturating_arithmetic_1.c b/gcc/testsuite/gcc.target/aarch64/saturating_arithmetic_1.c
index 8fc1569845b..c73a024edec 100644
--- a/gcc/testsuite/gcc.target/aarch64/saturating_arithmetic_1.c
+++ b/gcc/testsuite/gcc.target/aarch64/saturating_arithmetic_1.c
@@ -19,7 +19,7 @@
 **	ret
 */
 /*
-** usub: { xfail *-*-* }
+** usub:
 **	dup	v([0-9]+).8b, w[01]
 **	dup	v([0-9]+).8b, w[01]
 **	uqsub	b([0-9]+), b\1, b\2
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_1.c b/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_1.c
index 6936e9a2704..4cfab740c40 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_1.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_1.c
@@ -39,7 +39,7 @@
 ** ...
 */
 /*
-** usubq: { xfail *-*-* }
+** usubq:
 ** ...
 **	ld1b\tz([0-9]+)\.b, .*
 **	ld1b\tz([0-9]+)\.b, .*
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_3.c b/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_3.c
index 14e2de59b1e..def7c82e256 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_3.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_3.c
@@ -40,7 +40,7 @@
 ** ...
 */
 /*
-** usubq: { xfail *-*-* }
+** usubq:
 ** ...
 **	ld1w\tz([0-9]+)\.s, .*
 **	ld1w\tz([0-9]+)\.s, .*
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_4.c b/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_4.c
index 05a5786b4ab..5b9f8740ed4 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_4.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/saturating_arithmetic_4.c
@@ -40,7 +40,7 @@
 ** ...
 */
 /*
-** usubq: { xfail *-*-* }
+** usubq:
 ** ...
 **	ld1d\tz([0-9]+)\.d, .*
 **	ld1d\tz([0-9]+)\.d, .*