RISC-V: Support FP llrint auto vectorization

This patch would like to support the FP llrint auto vectorization.

* long long llrint (double)

This will be the CVT from DF => DI from the standard name's perpsective,
which has been covered in previous PATCH(es). Thus, this patch only add
some test cases.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/unop/test-math.h: Add type int64_t.
	* gcc.target/riscv/rvv/autovec/unop/math-llrint-0.c: New test.
	* gcc.target/riscv/rvv/autovec/unop/math-llrint-run-0.c: New test.
	* gcc.target/riscv/rvv/autovec/vls/math-llrint-0.c: New test.

Signed-off-by: Pan Li <pan2.li@intel.com>

gcc/testsuite/gcc.target/riscv/rvv/autovec/unop/math-llrint-0.c

+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fno-vect-cost-model -ffast-math -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "test-math.h"
+
+/*
+** test_double_int64_t___builtin_llrint:
+**   ...
+**   vsetvli\s+[atx][0-9]+,\s*zero,\s*e64,\s*m1,\s*ta,\s*ma
+**   vfcvt\.x\.f\.v\s+v[0-9]+,\s*v[0-9]+
+**   ...
+*/
+TEST_UNARY_CALL_CVT (double, int64_t, __builtin_llrint)

gcc/testsuite/gcc.target/riscv/rvv/autovec/unop/math-llrint-run-0.c

+/* { dg-do run { target { riscv_v && rv64 } } } */
+/* { dg-additional-options "-std=c99 -O3 -ftree-vectorize -fno-vect-cost-model -ffast-math" } */
+
+#include "test-math.h"
+
+#define ARRAY_SIZE 128
+
+double in[ARRAY_SIZE];
+int64_t out[ARRAY_SIZE];
+int64_t ref[ARRAY_SIZE];
+
+TEST_UNARY_CALL_CVT (double, int64_t, __builtin_llrint)
+TEST_ASSERT (int64_t)
+
+TEST_INIT_CVT (double, 1.2, int64_t, __builtin_llrint (1.2), 1)
+TEST_INIT_CVT (double, -1.2, int64_t, __builtin_llrint (-1.2), 2)
+TEST_INIT_CVT (double, 0.5, int64_t, __builtin_llrint (0.5), 3)
+TEST_INIT_CVT (double, -0.5, int64_t, __builtin_llrint (-0.5), 4)
+TEST_INIT_CVT (double, 0.1, int64_t, __builtin_llrint (0.1), 5)
+TEST_INIT_CVT (double, -0.1, int64_t, __builtin_llrint (-0.1), 6)
+TEST_INIT_CVT (double, 3.0, int64_t, __builtin_llrint (3.0), 7)
+TEST_INIT_CVT (double, -3.0, int64_t, __builtin_llrint (-3.0), 8)
+TEST_INIT_CVT (double, 4503599627370495.5, int64_t, __builtin_llrint (4503599627370495.5), 9)
+TEST_INIT_CVT (double, 4503599627370497.0, int64_t, __builtin_llrint (4503599627370497.0), 10)
+TEST_INIT_CVT (double, -4503599627370495.5, int64_t, __builtin_llrint (-4503599627370495.5), 11)
+TEST_INIT_CVT (double, -4503599627370496.0, int64_t, __builtin_llrint (-4503599627370496.0), 12)
+TEST_INIT_CVT (double, 0.0, int64_t, __builtin_llrint (-0.0), 13)
+TEST_INIT_CVT (double, -0.0, int64_t, __builtin_llrint (-0.0), 14)
+TEST_INIT_CVT (double, 9223372036854774784.0, int64_t, __builtin_llrint (9223372036854774784.0), 15)
+TEST_INIT_CVT (double, 9223372036854775808.0, int64_t, __builtin_llrint (9223372036854775808.0), 16)
+TEST_INIT_CVT (double, -9223372036854775808.0, int64_t, __builtin_llrint (-9223372036854775808.0), 17)
+TEST_INIT_CVT (double, -9223372036854777856.0, int64_t, __builtin_llrint (-9223372036854777856.0), 18)
+TEST_INIT_CVT (double, __builtin_inf (), int64_t, __builtin_llrint (__builtin_inf ()), 19)
+TEST_INIT_CVT (double, -__builtin_inf (), int64_t, __builtin_llrint (-__builtin_inf ()), 20)
+TEST_INIT_CVT (double, __builtin_nan (""), int64_t, 0x7fffffffffffffff, 21)
+
+int
+main ()
+{
+  RUN_TEST_CVT (double, int64_t, 1, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 2, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 3, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 4, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 5, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 6, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 7, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 8, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 9, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 10, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 11, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 12, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 13, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 14, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 15, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 16, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 17, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 18, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 19, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 20, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+  RUN_TEST_CVT (double, int64_t, 21, __builtin_llrint, in, out, ref, ARRAY_SIZE);
+
+  return 0;
+}

gcc/testsuite/gcc.target/riscv/rvv/autovec/unop/test-math.h

@@ -68,6 +68,8 @@
 #define FRM_RMM 4
 #define FRM_DYN 7
 
+typedef long long int64_t;
+
 static inline void
 set_rm (unsigned rm)
 {

gcc/testsuite/gcc.target/riscv/rvv/autovec/vls/math-llrint-0.c

+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv_zvl4096b -mabi=lp64d -O3 --param=riscv-autovec-lmul=m8 -ffast-math -fdump-tree-optimized" } */
+
+#include "def.h"
+
+DEF_OP_V_CVT (llrint, 1, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 2, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 4, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 8, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 16, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 32, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 64, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 128, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 256, double, int64_t, __builtin_llrint)
+DEF_OP_V_CVT (llrint, 512, double, int64_t, __builtin_llrint)
+
+/* { dg-final { scan-assembler-not {csrr} } } */
+/* { dg-final { scan-tree-dump-not "1,1" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "2,2" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "4,4" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "16,16" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "32,32" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "64,64" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "128,128" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "256,256" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "512,512" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "1024,1024" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "2048,2048" "optimized" } } */
+/* { dg-final { scan-tree-dump-not "4096,4096" "optimized" } } */
+/* { dg-final { scan-assembler-times {vfcvt\.x\.f\.v\s+v[0-9]+,\s*v[0-9]+} 9 } } */