diff mbox series

[1/2] i386: Use scalar operand in floating point vec_dup patterns

Message ID 20181017150232.32208-1-hjl.tools@gmail.com
State New
Headers show
Series [1/2] i386: Use scalar operand in floating point vec_dup patterns | expand

Commit Message

H.J. Lu Oct. 17, 2018, 3:02 p.m. UTC
Since vector registers are also used for scalar floating point values,
we can use scalar operand in floating point vec_dup patterns, which
enables combiner to generate

(set (reg:V8SF 84)
     (vec_duplicate:V8SF (mem/c:SF (symbol_ref:DI ("y")))))

For AVX512 broadcast instructions from integer register operand, we only
need to broadcast integer to integer vectors.

gcc/

	PR target/87537
	* config/i386/i386-builtin-types.def: Replace
	CODE_FOR_avx2_vec_dupv4sf, CODE_FOR_avx2_vec_dupv8sf and
	CODE_FOR_avx2_vec_dupv4df with CODE_FOR_vec_dupv4sf,
	CODE_FOR_vec_dupv8sf and CODE_FOR_vec_dupv4df, respectively.
	* config/i386/i386.c (expand_vec_perm_1): Replace
	gen_avx512f_vec_dupv16sf_1, gen_avx2_vec_dupv8sf_1 and
	gen_avx512f_vec_dupv8df_1 with gen_avx512f_vec_dupv16sf,
	gen_vec_dupv8sf and gen_avx512f_vec_dupv8df, respectively.
	Duplicate them from scalar operand.
	* config/i386/i386.md (SF to DF splitter): Replace
	gen_avx512f_vec_dupv16sf_1 with gen_avx512f_vec_dupv16sf.
	* config/i386/sse.md (VF48_AVX512VL): New.
	(avx2_vec_dup<mode>): Removed.
	(avx2_vec_dupv8sf_1): Likewise.
	(avx512f_vec_dup<mode>_1): Likewise.
	(avx2_vec_dupv4df): Likewise.
	(<avx512>_vec_dup<mode><mask_name>:V48_AVX512VL): Likewise.
	(<avx512>_vec_dup<mode><mask_name>:VF48_AVX512VL): New.
	(<avx512>_vec_dup<mode><mask_name>:VI48_AVX512VL): Likewise.
	(<mask_codefor><avx512>_vec_dup_gpr<mode><mask_name>): Replace
	V48_AVX512VL with VI48_AVX512VL.
	(*avx_vperm_broadcast_<mode>): Replace gen_avx2_vec_dupv8sf with
	gen_vec_dupv8sf.

gcc/testsuite/

	PR target/87537
	* gcc.target/i386/avx2-vbroadcastss_ps256-1.c: Updated.
	* gcc.target/i386/avx512vl-vbroadcast-3.c: Likewise.
---
 gcc/config/i386/i386-builtin.def              |  6 +-
 gcc/config/i386/i386.c                        | 28 ++++++-
 gcc/config/i386/i386.md                       |  2 +-
 gcc/config/i386/sse.md                        | 82 ++++++-------------
 .../i386/avx2-vbroadcastss_ps256-1.c          |  3 +-
 .../gcc.target/i386/avx512vl-vbroadcast-3.c   |  5 +-
 6 files changed, 56 insertions(+), 70 deletions(-)
diff mbox series

Patch

diff --git a/gcc/config/i386/i386-builtin.def b/gcc/config/i386/i386-builtin.def
index dc4c70c7ea3..922f9ea2544 100644
--- a/gcc/config/i386/i386-builtin.def
+++ b/gcc/config/i386/i386-builtin.def
@@ -1194,9 +1194,9 @@  BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_interleave_lowv16hi, "__builtin_ia32_
 BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_interleave_lowv8si, "__builtin_ia32_punpckldq256", IX86_BUILTIN_PUNPCKLDQ256, UNKNOWN, (int) V8SI_FTYPE_V8SI_V8SI)
 BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_interleave_lowv4di, "__builtin_ia32_punpcklqdq256", IX86_BUILTIN_PUNPCKLQDQ256, UNKNOWN, (int) V4DI_FTYPE_V4DI_V4DI)
 BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_xorv4di3, "__builtin_ia32_pxor256", IX86_BUILTIN_PXOR256, UNKNOWN, (int) V4DI_FTYPE_V4DI_V4DI)
-BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_vec_dupv4sf, "__builtin_ia32_vbroadcastss_ps", IX86_BUILTIN_VBROADCASTSS_PS, UNKNOWN, (int) V4SF_FTYPE_V4SF)
-BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_vec_dupv8sf, "__builtin_ia32_vbroadcastss_ps256", IX86_BUILTIN_VBROADCASTSS_PS256, UNKNOWN, (int) V8SF_FTYPE_V4SF)
-BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_vec_dupv4df, "__builtin_ia32_vbroadcastsd_pd256", IX86_BUILTIN_VBROADCASTSD_PD256, UNKNOWN, (int) V4DF_FTYPE_V2DF)
+BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_vec_dupv4sf, "__builtin_ia32_vbroadcastss_ps", IX86_BUILTIN_VBROADCASTSS_PS, UNKNOWN, (int) V4SF_FTYPE_V4SF)
+BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_vec_dupv8sf, "__builtin_ia32_vbroadcastss_ps256", IX86_BUILTIN_VBROADCASTSS_PS256, UNKNOWN, (int) V8SF_FTYPE_V4SF)
+BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_vec_dupv4df, "__builtin_ia32_vbroadcastsd_pd256", IX86_BUILTIN_VBROADCASTSD_PD256, UNKNOWN, (int) V4DF_FTYPE_V2DF)
 BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_vbroadcasti128_v4di, "__builtin_ia32_vbroadcastsi256", IX86_BUILTIN_VBROADCASTSI256, UNKNOWN, (int) V4DI_FTYPE_V2DI)
 BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_pblenddv4si, "__builtin_ia32_pblendd128", IX86_BUILTIN_PBLENDD128, UNKNOWN, (int) V4SI_FTYPE_V4SI_V4SI_INT)
 BDESC (OPTION_MASK_ISA_AVX2, CODE_FOR_avx2_pblenddv8si, "__builtin_ia32_pblendd256", IX86_BUILTIN_PBLENDD256, UNKNOWN, (int) V8SI_FTYPE_V8SI_V8SI_INT)
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 3ab6b205eb6..efddcbdcc24 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -45980,6 +45980,7 @@  expand_vec_perm_1 (struct expand_vec_perm_d *d)
 	{
 	  /* Use vpbroadcast{b,w,d}.  */
 	  rtx (*gen) (rtx, rtx) = NULL;
+	  machine_mode scalar_mode = VOIDmode;
 	  switch (d->vmode)
 	    {
 	    case E_V64QImode:
@@ -46010,15 +46011,18 @@  expand_vec_perm_1 (struct expand_vec_perm_d *d)
 	      gen = gen_avx2_pbroadcastv8hi;
 	      break;
 	    case E_V16SFmode:
+	      scalar_mode = SFmode;
 	      if (TARGET_AVX512F)
-		gen = gen_avx512f_vec_dupv16sf_1;
+		gen = gen_avx512f_vec_dupv16sf;
 	      break;
 	    case E_V8SFmode:
-	      gen = gen_avx2_vec_dupv8sf_1;
+	      scalar_mode = SFmode;
+	      gen = gen_vec_dupv8sf;
 	      break;
 	    case E_V8DFmode:
+	      scalar_mode = DFmode;
 	      if (TARGET_AVX512F)
-		gen = gen_avx512f_vec_dupv8df_1;
+		gen = gen_avx512f_vec_dupv8df;
 	      break;
 	    case E_V8DImode:
 	      if (TARGET_AVX512F)
@@ -46030,7 +46034,23 @@  expand_vec_perm_1 (struct expand_vec_perm_d *d)
 	  if (gen != NULL)
 	    {
 	      if (!d->testing_p)
-		emit_insn (gen (d->target, d->op0));
+		{
+		  if (scalar_mode == VOIDmode)
+		    emit_insn (gen (d->target, d->op0));
+		  else
+		    {
+		      rtx op = d->op0;
+		      unsigned int oppos = 0;
+		      if (SUBREG_P (op))
+			{
+			  op = SUBREG_REG (op);
+			  oppos = SUBREG_BYTE (op);
+			}
+		      emit_insn (gen (d->target,
+				      gen_rtx_SUBREG (scalar_mode,
+						      op, oppos)));
+		    }
+		}
 	      return true;
 	    }
 	}
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 7fb2b144f47..4a6fa077db5 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -4399,7 +4399,7 @@ 
       else
 	{
 	  rtx tmp = lowpart_subreg (V16SFmode, operands[3], V4SFmode);
-	  emit_insn (gen_avx512f_vec_dupv16sf_1 (tmp, tmp));
+	  emit_insn (gen_avx512f_vec_dupv16sf (tmp, tmp));
 	}
     }
   else
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index ff9f81535a9..13dc7370fd3 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -304,6 +304,10 @@ 
 (define_mode_iterator VF_512
   [V16SF V8DF])
 
+(define_mode_iterator VF48_AVX512VL
+  [V16SF (V8SF "TARGET_AVX512VL") (V4SF "TARGET_AVX512VL")
+   V8DF  (V4DF "TARGET_AVX512VL") (V2DF "TARGET_AVX512VL")])
+
 (define_mode_iterator VI48_AVX512VL
   [V16SI (V8SI  "TARGET_AVX512VL") (V4SI  "TARGET_AVX512VL")
    V8DI  (V4DI  "TARGET_AVX512VL") (V2DI  "TARGET_AVX512VL")])
@@ -6776,42 +6780,6 @@ 
    (set_attr "prefix" "orig,maybe_evex")
    (set_attr "mode" "SF")])
 
-(define_insn "avx2_vec_dup<mode>"
-  [(set (match_operand:VF1_128_256 0 "register_operand" "=v")
-	(vec_duplicate:VF1_128_256
-	  (vec_select:SF
-	    (match_operand:V4SF 1 "register_operand" "v")
-	    (parallel [(const_int 0)]))))]
-  "TARGET_AVX2"
-  "vbroadcastss\t{%1, %0|%0, %1}"
-  [(set_attr "type" "sselog1")
-    (set_attr "prefix" "maybe_evex")
-    (set_attr "mode" "<MODE>")])
-
-(define_insn "avx2_vec_dupv8sf_1"
-  [(set (match_operand:V8SF 0 "register_operand" "=v")
-	(vec_duplicate:V8SF
-	  (vec_select:SF
-	    (match_operand:V8SF 1 "register_operand" "v")
-	    (parallel [(const_int 0)]))))]
-  "TARGET_AVX2"
-  "vbroadcastss\t{%x1, %0|%0, %x1}"
-  [(set_attr "type" "sselog1")
-    (set_attr "prefix" "maybe_evex")
-    (set_attr "mode" "V8SF")])
-
-(define_insn "avx512f_vec_dup<mode>_1"
-  [(set (match_operand:VF_512 0 "register_operand" "=v")
-	(vec_duplicate:VF_512
-	  (vec_select:<ssescalarmode>
-	    (match_operand:VF_512 1 "register_operand" "v")
-	    (parallel [(const_int 0)]))))]
-  "TARGET_AVX512F"
-  "vbroadcast<bcstscalarsuff>\t{%x1, %0|%0, %x1}"
-  [(set_attr "type" "sselog1")
-    (set_attr "prefix" "evex")
-    (set_attr "mode" "<MODE>")])
-
 ;; Although insertps takes register source, we prefer
 ;; unpcklps with register source since it is shorter.
 (define_insn "*vec_concatv2sf_sse4_1"
@@ -17721,18 +17689,6 @@ 
    (set_attr "prefix" "vex")
    (set_attr "mode" "OI")])
 
-(define_insn "avx2_vec_dupv4df"
-  [(set (match_operand:V4DF 0 "register_operand" "=v")
-	(vec_duplicate:V4DF
-	  (vec_select:DF
-	    (match_operand:V2DF 1 "register_operand" "v")
-	    (parallel [(const_int 0)]))))]
-  "TARGET_AVX2"
-  "vbroadcastsd\t{%1, %0|%0, %1}"
-  [(set_attr "type" "sselog1")
-   (set_attr "prefix" "maybe_evex")
-   (set_attr "mode" "V4DF")])
-
 (define_insn "<avx512>_vec_dup<mode>_1"
   [(set (match_operand:VI_AVX512BW 0 "register_operand" "=v,v")
 	(vec_duplicate:VI_AVX512BW
@@ -17748,11 +17704,9 @@ 
    (set_attr "mode" "<sseinsnmode>")])
 
 (define_insn "<avx512>_vec_dup<mode><mask_name>"
-  [(set (match_operand:V48_AVX512VL 0 "register_operand" "=v")
-	(vec_duplicate:V48_AVX512VL
-	  (vec_select:<ssescalarmode>
-	    (match_operand:<ssexmmmode> 1 "nonimmediate_operand" "vm")
-	    (parallel [(const_int 0)]))))]
+  [(set (match_operand:VF48_AVX512VL 0 "register_operand" "=v")
+	(vec_duplicate:VF48_AVX512VL
+	  (match_operand:<ssescalarmode> 1 "nonimmediate_operand" "vm")))]
   "TARGET_AVX512F"
 {
   /*  There is no DF broadcast (in AVX-512*) to 128b register.
@@ -17766,6 +17720,18 @@ 
    (set_attr "prefix" "evex")
    (set_attr "mode" "<sseinsnmode>")])
 
+(define_insn "<avx512>_vec_dup<mode><mask_name>"
+  [(set (match_operand:VI48_AVX512VL 0 "register_operand" "=v")
+	(vec_duplicate:VI48_AVX512VL
+	  (vec_select:<ssescalarmode>
+	    (match_operand:<ssexmmmode> 1 "nonimmediate_operand" "vm")
+	    (parallel [(const_int 0)]))))]
+  "TARGET_AVX512F"
+  "v<sseintprefix>broadcast<bcstscalarsuff>\t{%1, %0<mask_operand2>|%0<mask_operand2>, %<iptr>1}"
+  [(set_attr "type" "ssemov")
+   (set_attr "prefix" "evex")
+   (set_attr "mode" "<sseinsnmode>")])
+
 (define_insn "<avx512>_vec_dup<mode><mask_name>"
   [(set (match_operand:VI12_AVX512VL 0 "register_operand" "=v")
 	(vec_duplicate:VI12_AVX512VL
@@ -17815,8 +17781,8 @@ 
    (set_attr "mode" "<sseinsnmode>")])
 
 (define_insn "<mask_codefor><avx512>_vec_dup_gpr<mode><mask_name>"
-  [(set (match_operand:V48_AVX512VL 0 "register_operand" "=v,v")
-	(vec_duplicate:V48_AVX512VL
+  [(set (match_operand:VI48_AVX512VL 0 "register_operand" "=v,v")
+	(vec_duplicate:VI48_AVX512VL
 	  (match_operand:<ssescalarmode> 1 "nonimmediate_operand" "vm,r")))]
   "TARGET_AVX512F"
   "v<sseintprefix>broadcast<bcstscalarsuff>\t{%1, %0<mask_operand2>|%0<mask_operand2>, %1}"
@@ -17825,8 +17791,7 @@ 
    (set_attr "mode" "<sseinsnmode>")
    (set (attr "enabled")
      (if_then_else (eq_attr "alternative" "1")
-	(symbol_ref "GET_MODE_CLASS (<ssescalarmode>mode) == MODE_INT
-		     && (<ssescalarmode>mode != DImode || TARGET_64BIT)")
+	(symbol_ref "<ssescalarmode>mode != DImode || TARGET_64BIT")
 	(const_int 1)))])
 
 (define_insn "vec_dupv4sf"
@@ -18155,8 +18120,7 @@ 
 	     or VSHUFF128.  */
 	  gcc_assert (<MODE>mode == V8SFmode);
 	  if ((mask & 1) == 0)
-	    emit_insn (gen_avx2_vec_dupv8sf (op0,
-					     gen_lowpart (V4SFmode, op0)));
+	    emit_insn (gen_vec_dupv8sf (op0, gen_lowpart (V4SFmode, op0)));
 	  else
 	    emit_insn (gen_avx512vl_shuf_f32x4_1 (op0, op0, op0,
 						  GEN_INT (4), GEN_INT (5),
diff --git a/gcc/testsuite/gcc.target/i386/avx2-vbroadcastss_ps256-1.c b/gcc/testsuite/gcc.target/i386/avx2-vbroadcastss_ps256-1.c
index dfac3916b08..3ff7497aa21 100644
--- a/gcc/testsuite/gcc.target/i386/avx2-vbroadcastss_ps256-1.c
+++ b/gcc/testsuite/gcc.target/i386/avx2-vbroadcastss_ps256-1.c
@@ -1,6 +1,7 @@ 
 /* { dg-do compile } */
 /* { dg-options "-mavx2 -O2" } */
-/* { dg-final { scan-assembler "vbroadcastss\[ \\t\]+\[^\n\]*%xmm\[0-9\]" } } */
+/* { dg-final { scan-assembler "vbroadcastss\[ \\t\]+\[^\n\]*%ymm\[0-9\]" } } */
+/* { dg-final { scan-assembler-not "vmovaps\[\t \]*\[^,\]*,%xmm\[0-9\]" } } */
 
 #include <immintrin.h>
 
diff --git a/gcc/testsuite/gcc.target/i386/avx512vl-vbroadcast-3.c b/gcc/testsuite/gcc.target/i386/avx512vl-vbroadcast-3.c
index 7233398cd64..1c62364dac4 100644
--- a/gcc/testsuite/gcc.target/i386/avx512vl-vbroadcast-3.c
+++ b/gcc/testsuite/gcc.target/i386/avx512vl-vbroadcast-3.c
@@ -151,8 +151,8 @@  f16 (V2 *x)
 }
 
 /* { dg-final { scan-assembler-times "vbroadcastss\[^\n\r]*%\[re\]di\[^\n\r]*%xmm16" 4 } } */
-/* { dg-final { scan-assembler-times "vbroadcastss\[^\n\r]*%xmm16\[^\n\r]*%ymm16" 3 } } */
-/* { dg-final { scan-assembler-times "vbroadcastss\[^\n\r]*%\[re\]di\[^\n\r]*%ymm16" 3 } } */
+/* { dg-final { scan-assembler-times "vbroadcastss\[^\n\r]*%xmm16\[^\n\r]*%ymm16" 1 } } */
+/* { dg-final { scan-assembler-times "vbroadcastss\[^\n\r]*%\[re\]di\[^\n\r]*%ymm16" 4 } } */
 /* { dg-final { scan-assembler-times "vpermilps\[^\n\r]*\\\$0\[^\n\r]*%xmm16\[^\n\r]*%xmm16" 1 } } */
 /* { dg-final { scan-assembler-times "vpermilps\[^\n\r]*\\\$85\[^\n\r]*%xmm16\[^\n\r]*%xmm16" 1 } } */
 /* { dg-final { scan-assembler-times "vpermilps\[^\n\r]*\\\$170\[^\n\r]*%xmm16\[^\n\r]*%xmm16" 1 } } */
@@ -160,3 +160,4 @@  f16 (V2 *x)
 /* { dg-final { scan-assembler-times "vpermilps\[^\n\r]*\\\$0\[^\n\r]*%ymm16\[^\n\r]*%ymm16" 1 } } */
 /* { dg-final { scan-assembler-times "vpermilps\[^\n\r]*\\\$85\[^\n\r]*%ymm16\[^\n\r]*%ymm16" 2 } } */
 /* { dg-final { scan-assembler-times "vshuff32x4\[^\n\r]*\\\$3\[^\n\r]*%ymm16\[^\n\r]*%ymm16\[^\n\r]*%ymm16" 2 } } */
+/* { dg-final { scan-assembler-times "vshuff32x4\[^\n\r]*\\\$0\[^\n\r]*%ymm16\[^\n\r]*%ymm16\[^\n\r]*%ymm16" 1 } } */