x86: Add vec_duplicate<mode> expander

Add vec_duplicate<mode> expander for SSE2 if we can move from GPR to SSE
register directly.

	* config/i386/i386-expand.c (ix86_expand_vector_init_duplicate):
	Make it global.
	* config/i386/i386-protos.h (ix86_expand_vector_init_duplicate):
	New prototype.
	* config/i386/sse.md (INT_BROADCAST_MODE): New mode iterator.
	(vec_duplicate<mode>): New expander.

diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
index 07381410ad57f4e9fb1e3143baaf7273a22e3ff6..5c9170e3a1d56cdc8c642e00947e71ed4afdb781 100644 (file)
--- a/gcc/config/i386/i386-expand.c
+++ b/gcc/config/i386/i386-expand.c
@@ -93,9 +93,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "i386-builtins.h"
 #include "i386-expand.h"
 
-static bool ix86_expand_vector_init_duplicate (bool, machine_mode, rtx,
-                                              rtx);
-
 /* Split one or more double-mode RTL references into pairs of half-mode
    references.  The RTL can be REG, offsettable MEM, integer constant, or
    CONST_DOUBLE.  "operands" is a pointer to an array of double-mode RTLs to
@@ -13909,7 +13906,7 @@ static bool expand_vec_perm_1 (struct expand_vec_perm_d *d);
 /* A subroutine of ix86_expand_vector_init.  Store into TARGET a vector
    with all elements equal to VAR.  Return true if successful.  */
 
-static bool
+bool
 ix86_expand_vector_init_duplicate (bool mmx_ok, machine_mode mode,
                                   rtx target, rtx val)
 {

diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h
index 71745b9a1eadc389dc0e6658434106b0a604d7fb..51376fcc454faa6b2ce9a2ff4809a6366e20de26 100644 (file)
--- a/gcc/config/i386/i386-protos.h
+++ b/gcc/config/i386/i386-protos.h
@@ -258,6 +258,8 @@ extern void ix86_expand_mul_widen_hilo (rtx, rtx, rtx, bool, bool);
 extern void ix86_expand_sse2_mulv4si3 (rtx, rtx, rtx);
 extern void ix86_expand_sse2_mulvxdi3 (rtx, rtx, rtx);
 extern void ix86_expand_sse2_abs (rtx, rtx);
+extern bool ix86_expand_vector_init_duplicate (bool, machine_mode, rtx,
+                                              rtx);
 
 /* In i386-c.c  */
 extern void ix86_target_macros (void);

diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index d3f5a74f7638cc3b2324aa259a13576df34e8a20..f0b450ab4be63175c38abdb866122647ed09aee3 100644 (file)
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -24814,3 +24814,34 @@
   "TARGET_WIDEKL"
   "aes<aeswideklvariant>\t{%0}"
   [(set_attr "type" "other")])
+
+;; Modes handled by broadcast patterns.  NB: Allow V64QI and V32HI with
+;; TARGET_AVX512F since ix86_expand_vector_init_duplicate can expand
+;; without TARGET_AVX512BW which is used by memset vector broadcast
+;; expander to XI with:
+;;     vmovd           %edi, %xmm15
+;;     vpbroadcastb    %xmm15, %ymm15
+;;     vinserti64x4    $0x1, %ymm15, %zmm15, %zmm15
+
+(define_mode_iterator INT_BROADCAST_MODE
+  [(V64QI "TARGET_AVX512F") (V32QI "TARGET_AVX") V16QI
+   (V32HI "TARGET_AVX512F") (V16HI "TARGET_AVX") V8HI
+   (V16SI "TARGET_AVX512F") (V8SI "TARGET_AVX") V4SI
+   (V8DI "TARGET_AVX512F && TARGET_64BIT")
+   (V4DI "TARGET_AVX && TARGET_64BIT") (V2DI "TARGET_64BIT")])
+
+;; Broadcast from an integer.  NB: Enable broadcast only if we can move
+;; from GPR to SSE register directly.
+(define_expand "vec_duplicate<mode>"
+  [(set (match_operand:INT_BROADCAST_MODE 0 "register_operand")
+       (vec_duplicate:INT_BROADCAST_MODE
+         (match_operand:<ssescalarmode> 1 "nonimmediate_operand")))]
+  "TARGET_SSE2 && TARGET_INTER_UNIT_MOVES_TO_VEC"
+{
+  if (!ix86_expand_vector_init_duplicate (false,
+                                         GET_MODE (operands[0]),
+                                         operands[0],
+                                         operands[1]))
+    gcc_unreachable ();
+  DONE;
+})