835-2.diff

diff --git a/gcc/config/arm/neon.md b/gcc/config/arm/neon.md
index 654d9d5..f2dbcc4 100644
--- a/gcc/config/arm/neon.md
+++ b/gcc/config/arm/neon.md
@@ -548,6 +548,33 @@
                     (const_string "neon_mul_<V_elem_ch><q>")))]
 )

+(define_expand "div<mode>3"
+  [(set (match_operand:VCVTF 0 "s_register_operand" "=w")
+        (div:VCVTF (match_operand:VCVTF 1 "s_register_operand" "w")
+         (match_operand:VCVTF 2 "s_register_operand" "w")))]
+  "TARGET_NEON && !optimize_size
+   && flag_unsafe_math_optimizations && flag_reciprocal_math"
+  {
+    rtx rec = gen_reg_rtx (<MODE>mode);
+    rtx vrecps_temp = gen_reg_rtx (<MODE>mode);
+
+    /* Reciprocal estimate.  */
+    emit_insn (gen_neon_vrecpe<mode> (rec, operands[2]));
+
+    /* Perform 2 iterations of newton-raphson method.  */
+    for (int i = 0; i < 2; i++)
+      {
+   emit_insn (gen_neon_vrecps<mode> (vrecps_temp, rec, operands[2]));
+   emit_insn (gen_mul<mode>3 (rec, rec, vrecps_temp));
+      }
+
+    /* We now have reciprocal in rec, perform operands[0] = operands[1] * rec.  */
+    emit_insn (gen_mul<mode>3 (operands[0], operands[1], rec));
+    DONE;
+  }
+)
+
+
 (define_insn "mul<mode>3add<mode>_neon"
   [(set (match_operand:VDQW 0 "s_register_operand" "=w")
         (plus:VDQW (mult:VDQW (match_operand:VDQW 2 "s_register_operand" "w")
diff --git a/gcc/testsuite/gcc.target/arm/vect-div-1.c b/gcc/testsuite/gcc.target/arm/vect-div-1.c
new file mode 100644
index 0000000..e562ef3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/vect-div-1.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_v8_neon_ok } */
+/* { dg-options "-O2 -funsafe-math-optimizations -ftree-vectorize -fdump-tree-vect-all" } */
+/* { dg-add-options arm_v8_neon } */
+
+void
+foo (int len, float * __restrict p, float *__restrict x)
+{
+  len = len & ~31;
+  for (int i = 0; i < len; i++)
+    p[i] = p[i] / x[i];
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
diff --git a/gcc/testsuite/gcc.target/arm/vect-div-2.c b/gcc/testsuite/gcc.target/arm/vect-div-2.c
new file mode 100644
index 0000000..8e15d0a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/vect-div-2.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_v8_neon_ok } */
+/* { dg-options "-O2 -funsafe-math-optimizations -fno-reciprocal-math -ftree-vectorize -fdump-tree-vect-all" } */
+/* { dg-add-options arm_v8_neon } */
+
+void
+foo (int len, float * __restrict p, float *__restrict x)
+{
+  len = len & ~31;
+  for (int i = 0; i < len; i++)
+    p[i] = p[i] / x[i];
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" } } */