[PATCH 53/62] AVX512FP16: Add expander for sqrthf2.

[liuhongt <hongtao.liu@intel.com>]

gcc/ChangeLog:

	* config/i386/i386-features.c (i386-features.c): Handle
	E_HFmode.
	* config/i386/i386.md (sqrthf2): New expander.
	(*sqrt<mode>2_sse): Extend to MODEFH.
	* config/i386/sse.md
	(*<sse>_vmsqrt<mode>2<mask_scalar_name><round_scalar_name>):
	Extend to VFH_128.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx512fp16-builtin-sqrt-1.c: New test.
	* gcc.target/i386/avx512fp16vl-builtin-sqrt-1.c: New test.
---
 gcc/config/i386/i386-features.c               | 15 +++++++++++----
 gcc/config/i386/i386.md                       | 12 +++++++++---
 gcc/config/i386/sse.md                        |  8 ++++----
 .../i386/avx512fp16-builtin-sqrt-1.c          | 18 ++++++++++++++++++
 .../i386/avx512fp16vl-builtin-sqrt-1.c        | 19 +++++++++++++++++++
 5 files changed, 61 insertions(+), 11 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/i386/avx512fp16-builtin-sqrt-1.c
 create mode 100644 gcc/testsuite/gcc.target/i386/avx512fp16vl-builtin-sqrt-1.c

diff --git a/gcc/config/i386/i386-features.c b/gcc/config/i386/i386-features.c
index a25769ae478..0b5a1a3af53 100644
--- a/gcc/config/i386/i386-features.c
+++ b/gcc/config/i386/i386-features.c
@@ -2238,15 +2238,22 @@ remove_partial_avx_dependency (void)
 
 	  rtx zero;
 	  machine_mode dest_vecmode;
-	  if (dest_mode == E_SFmode)
+	  switch (dest_mode)
 	    {
+	    case E_HFmode:
+	      dest_vecmode = V8HFmode;
+	      zero = gen_rtx_SUBREG (V8HFmode, v4sf_const0, 0);
+	      break;
+	    case E_SFmode:
 	      dest_vecmode = V4SFmode;
 	      zero = v4sf_const0;
-	    }
-	  else
-	    {
+	      break;
+	    case E_DFmode:
 	      dest_vecmode = V2DFmode;
 	      zero = gen_rtx_SUBREG (V2DFmode, v4sf_const0, 0);
+	      break;
+	    default:
+	      gcc_unreachable ();
 	    }
 
 	  /* Change source to vector mode.  */
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index a85c23d74f1..81c893c60de 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -16561,9 +16561,9 @@ (define_expand "rsqrtsf2"
 })
 
 (define_insn "*sqrt<mode>2_sse"
-  [(set (match_operand:MODEF 0 "register_operand" "=v,v,v")
-	(sqrt:MODEF
-	  (match_operand:MODEF 1 "nonimmediate_operand" "0,v,m")))]
+  [(set (match_operand:MODEFH 0 "register_operand" "=v,v,v")
+	(sqrt:MODEFH
+	  (match_operand:MODEFH 1 "nonimmediate_operand" "0,v,m")))]
   "SSE_FLOAT_MODE_P (<MODE>mode) && TARGET_SSE_MATH"
   "@
    %vsqrt<ssemodesuffix>\t{%d1, %0|%0, %d1}
@@ -16583,6 +16583,12 @@ (define_insn "*sqrt<mode>2_sse"
 	    ]
 	    (symbol_ref "true")))])
 
+(define_expand "sqrthf2"
+  [(set (match_operand:HF 0 "register_operand")
+	(sqrt:HF
+	  (match_operand:HF 1 "nonimmediate_operand")))]
+  "TARGET_AVX512FP16")
+
 (define_expand "sqrt<mode>2"
   [(set (match_operand:MODEF 0 "register_operand")
 	(sqrt:MODEF
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 2c3dba5bdb0..b47e7f0b82a 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -2389,12 +2389,12 @@ (define_insn "<sse>_vmsqrt<mode>2<mask_scalar_name><round_scalar_name>"
    (set_attr "mode" "<ssescalarmode>")])
 
 (define_insn "*<sse>_vmsqrt<mode>2<mask_scalar_name><round_scalar_name>"
-  [(set (match_operand:VF_128 0 "register_operand" "=x,v")
-	(vec_merge:VF_128
-	  (vec_duplicate:VF_128
+  [(set (match_operand:VFH_128 0 "register_operand" "=x,v")
+	(vec_merge:VFH_128
+	  (vec_duplicate:VFH_128
 	    (sqrt:<ssescalarmode>
 	      (match_operand:<ssescalarmode> 1 "nonimmediate_operand" "xm,<round_scalar_constraint>")))
-	  (match_operand:VF_128 2 "register_operand" "0,v")
+	  (match_operand:VFH_128 2 "register_operand" "0,v")
 	  (const_int 1)))]
   "TARGET_SSE"
   "@
diff --git a/gcc/testsuite/gcc.target/i386/avx512fp16-builtin-sqrt-1.c b/gcc/testsuite/gcc.target/i386/avx512fp16-builtin-sqrt-1.c
new file mode 100644
index 00000000000..38cdf23fef7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/avx512fp16-builtin-sqrt-1.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -mavx512fp16" } */
+
+_Float16
+f1 (_Float16 x)
+{
+  return __builtin_sqrtf16 (x);
+}
+
+void
+f2 (_Float16* __restrict psrc, _Float16* __restrict pdst)
+{
+  for (int i = 0; i != 32; i++)
+    pdst[i] = __builtin_sqrtf16 (psrc[i]);
+}
+
+/* { dg-final { scan-assembler-times "vsqrtsh\[^\n\r\]*xmm\[0-9\]" 1 } } */
+/* { dg-final { scan-assembler-times "vsqrtph\[^\n\r\]*zmm\[0-9\]" 1 } } */
diff --git a/gcc/testsuite/gcc.target/i386/avx512fp16vl-builtin-sqrt-1.c b/gcc/testsuite/gcc.target/i386/avx512fp16vl-builtin-sqrt-1.c
new file mode 100644
index 00000000000..08deb3ea470
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/avx512fp16vl-builtin-sqrt-1.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -mavx512fp16 -mavx512vl" } */
+
+void
+f1 (_Float16* __restrict psrc, _Float16* __restrict pdst)
+{
+  for (int i = 0; i != 8; i++)
+    pdst[i] = __builtin_sqrtf16 (psrc[i]);
+}
+
+void
+f2 (_Float16* __restrict psrc, _Float16* __restrict pdst)
+{
+  for (int i = 0; i != 16; i++)
+    pdst[i] = __builtin_sqrtf16 (psrc[i]);
+}
+
+/* { dg-final { scan-assembler-times "vsqrtph\[^\n\r\]*xmm\[0-9\]" 1 } } */
+/* { dg-final { scan-assembler-times "vsqrtph\[^\n\r\]*ymm\[0-9\]" 1 } } */
-- 
2.18.1