This patch is to add the support for float from/to long conversion

vectorization on port rs6000.

gcc/ChangeLog

2019-09-29  Kewen Lin  <linkw@gcc.gnu.org>

    * config/rs6000/vsx.md (vec_pack[su]_float_v2di): New define_expand.
    (vec_unpack_[su]fix_trunc_hi_v4sf): Likewise.
    (vec_unpack_[su]fix_trunc_lo_v4sf): Likewise.

gcc/testsuite/ChangeLog

2019-09-29  Kewen Lin  <linkw@gcc.gnu.org>

    * gcc.target/powerpc/conv-vectorize-1.c: New test.
    * gcc.target/powerpc/conv-vectorize-2.c: New test.

From-SVN: r276266

gcc/ChangeLog

+2019-09-29  Kewen Lin  <linkw@gcc.gnu.org>
+
+	* config/rs6000/vsx.md (vec_pack[su]_float_v2di): New define_expand.
+	(vec_unpack_[su]fix_trunc_hi_v4sf): Likewise.
+	(vec_unpack_[su]fix_trunc_lo_v4sf): Likewise.
+
 2019-09-28  Iain Sandoe  <iain@sandoe.co.uk>
 
 	* config/darwin.c (gen_macho_high): Amend to include the mode

gcc/config/rs6000/vsx.md

@@ -5544,3 +5544,48 @@
   operands[SFBOOL_TMP_VSX_DI] = gen_rtx_REG (DImode, regno_tmp_vsx);
   operands[SFBOOL_MTVSR_D_V4SF] = gen_rtx_REG (V4SFmode, regno_mtvsr_d);
 })
+
+;; Support signed/unsigned long long to float conversion vectorization.
+;; Note that any_float (pc) here is just for code attribute <su>.
+(define_expand "vec_pack<su>_float_v2di"
+  [(match_operand:V4SF 0 "vfloat_operand")
+   (match_operand:V2DI 1 "vint_operand")
+   (match_operand:V2DI 2 "vint_operand")
+   (any_float (pc))]
+  "TARGET_VSX"
+{
+  rtx r1 = gen_reg_rtx (V4SFmode);
+  rtx r2 = gen_reg_rtx (V4SFmode);
+  emit_insn (gen_vsx_xvcv<su>xdsp (r1, operands[1]));
+  emit_insn (gen_vsx_xvcv<su>xdsp (r2, operands[2]));
+  rs6000_expand_extract_even (operands[0], r1, r2);
+  DONE;
+})
+
+;; Support float to signed/unsigned long long conversion vectorization.
+;; Note that any_fix (pc) here is just for code attribute <su>.
+(define_expand "vec_unpack_<su>fix_trunc_hi_v4sf"
+  [(match_operand:V2DI 0 "vint_operand")
+   (match_operand:V4SF 1 "vfloat_operand")
+   (any_fix (pc))]
+  "TARGET_VSX"
+{
+  rtx reg = gen_reg_rtx (V4SFmode);
+  rs6000_expand_interleave (reg, operands[1], operands[1], BYTES_BIG_ENDIAN);
+  emit_insn (gen_vsx_xvcvsp<su>xds (operands[0], reg));
+  DONE;
+})
+
+;; Note that any_fix (pc) here is just for code attribute <su>.
+(define_expand "vec_unpack_<su>fix_trunc_lo_v4sf"
+  [(match_operand:V2DI 0 "vint_operand")
+   (match_operand:V4SF 1 "vfloat_operand")
+   (any_fix (pc))]
+  "TARGET_VSX"
+{
+  rtx reg = gen_reg_rtx (V4SFmode);
+  rs6000_expand_interleave (reg, operands[1], operands[1], !BYTES_BIG_ENDIAN);
+  emit_insn (gen_vsx_xvcvsp<su>xds (operands[0], reg));
+  DONE;
+})
+

gcc/testsuite/ChangeLog

+2019-09-29  Kewen Lin  <linkw@gcc.gnu.org>
+
+	* gcc.target/powerpc/conv-vectorize-1.c: New test.
+	* gcc.target/powerpc/conv-vectorize-2.c: New test.
+
 2019-09-28  Steven G. Kargl  <kargl@gcc.ngu.org>
 
 	PR fortran/91802

gcc/testsuite/gcc.target/powerpc/conv-vectorize-1.c

+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-O2 -ftree-vectorize -mvsx" } */
+
+/* Test vectorizer can exploit vector conversion instructions to convert
+   unsigned/signed long long to float.  */
+
+#include <stddef.h>
+
+#define SIZE 32
+#define ALIGN 16
+
+float sflt_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+float uflt_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+
+unsigned long long ulong_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+signed long long slong_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+
+void
+convert_slong_to_float (void)
+{
+  size_t i;
+
+  for (i = 0; i < SIZE; i++)
+    sflt_array[i] = (float) slong_array[i];
+}
+
+void
+convert_ulong_to_float (void)
+{
+  size_t i;
+
+  for (i = 0; i < SIZE; i++)
+    uflt_array[i] = (float) ulong_array[i];
+}
+
+/* { dg-final { scan-assembler {\mxvcvsxdsp\M} } } */
+/* { dg-final { scan-assembler {\mxvcvuxdsp\M} } } */

gcc/testsuite/gcc.target/powerpc/conv-vectorize-2.c

+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-O2 -ftree-vectorize -mvsx" } */
+
+/* Test vectorizer can exploit vector conversion instructions to convert
+   float to unsigned/signed long long.  */
+
+#include <stddef.h>
+
+#define SIZE 32
+#define ALIGN 16
+
+float sflt_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+float uflt_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+
+unsigned long long ulong_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+signed long long slong_array[SIZE] __attribute__ ((__aligned__ (ALIGN)));
+
+void
+convert_float_to_slong (void)
+{
+  size_t i;
+
+  for (i = 0; i < SIZE; i++)
+    slong_array[i] = (signed long long) sflt_array[i];
+}
+
+void
+convert_float_to_ulong (void)
+{
+  size_t i;
+
+  for (i = 0; i < SIZE; i++)
+    ulong_array[i] = (unsigned long long) uflt_array[i];
+}
+
+/* { dg-final { scan-assembler {\mxvcvspsxds\M} } } */
+/* { dg-final { scan-assembler {\mxvcvspuxds\M} } } */