[gcc r12-3832] AVX512FP16: Add expander for rint/nearbyinthf2.

[hongtao Liu]

https://gcc.gnu.org/g:cb8d916eef53327d922f5301bc2ce29735fb7e24

commit r12-3832-gcb8d916eef53327d922f5301bc2ce29735fb7e24
Author: liuhongt <hongtao.liu@intel.com>
Date:   Wed Sep 22 15:03:36 2021 +0800

    AVX512FP16: Add expander for rint/nearbyinthf2.
    
    gcc/ChangeLog:
    
            * config/i386/i386.md (rinthf2): New expander.
            (nearbyinthf2): New expander.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/i386/avx512fp16-builtin-round-1.c: Add new testcase.

Diff:
---
 gcc/config/i386/i386.md                            | 22 ++++++++++++++++++++++
 .../gcc.target/i386/avx512fp16-builtin-round-1.c   | 14 ++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 60d877668d5..4b13a59be82 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -18287,6 +18287,17 @@
    (set_attr "znver1_decode" "vector")
    (set_attr "mode" "XF")])
 
+(define_expand "rinthf2"
+  [(match_operand:HF 0 "register_operand")
+   (match_operand:HF 1 "nonimmediate_operand")]
+  "TARGET_AVX512FP16"
+{
+  emit_insn (gen_sse4_1_roundhf2 (operands[0],
+				  operands[1],
+				  GEN_INT (ROUND_MXCSR)));
+  DONE;
+})
+
 (define_expand "rint<mode>2"
   [(use (match_operand:MODEF 0 "register_operand"))
    (use (match_operand:MODEF 1 "nonimmediate_operand"))]
@@ -18320,6 +18331,17 @@
   "TARGET_USE_FANCY_MATH_387
    && !flag_trapping_math")
 
+(define_expand "nearbyinthf2"
+  [(match_operand:HF 0 "register_operand")
+   (match_operand:HF 1 "nonimmediate_operand")]
+  "TARGET_AVX512FP16"
+{
+  emit_insn (gen_sse4_1_roundhf2 (operands[0],
+				  operands[1],
+				  GEN_INT (ROUND_MXCSR | ROUND_NO_EXC)));
+  DONE;
+})
+
 (define_expand "nearbyint<mode>2"
   [(use (match_operand:MODEF 0 "register_operand"))
    (use (match_operand:MODEF 1 "nonimmediate_operand"))]
diff --git a/gcc/testsuite/gcc.target/i386/avx512fp16-builtin-round-1.c b/gcc/testsuite/gcc.target/i386/avx512fp16-builtin-round-1.c
index 3cab1526967..a1c6636e354 100644
--- a/gcc/testsuite/gcc.target/i386/avx512fp16-builtin-round-1.c
+++ b/gcc/testsuite/gcc.target/i386/avx512fp16-builtin-round-1.c
@@ -25,7 +25,21 @@ f4 (_Float16 x)
   return __builtin_roundevenf16 (x);
 }
 
+_Float16
+f5 (_Float16 x)
+{
+  return __builtin_rintf16 (x);
+}
+
+_Float16
+f6 (_Float16 x)
+{
+  return __builtin_nearbyintf16 (x);
+}
+
 /* { dg-final { scan-assembler-times "vrndscalesh\[ \\t\]+\\\$11\[^\n\r\]*xmm\[0-9\]" 1 } } */
 /* { dg-final { scan-assembler-times "vrndscalesh\[ \\t\]+\\\$10\[^\n\r\]*xmm\[0-9\]" 1 } } */
 /* { dg-final { scan-assembler-times "vrndscalesh\[ \\t\]+\\\$9\[^\n\r\]*xmm\[0-9\]" 1 } } */
 /* { dg-final { scan-assembler-times "vrndscalesh\[ \\t\]+\\\$8\[^\n\r\]*xmm\[0-9\]" 1 } } */
+/* { dg-final { scan-assembler-times "vrndscalesh\[ \\t\]+\\\$4\[^\n\r\]*xmm\[0-9\]" 1 } } */
+/* { dg-final { scan-assembler-times "vrndscalesh\[ \\t\]+\\\$12\[^\n\r\]*xmm\[0-9\]" 1 } } */