This patch adds a new tuning model for the NVIDIA Olympus core.
The values used here are based on the Software Optimization Guide
that will be published imminently.
Bootstrapped and tested on aarch64-linux-gnu, no regression.
OK for trunk?
OK to backport to GCC 15?
Signed-off-by: Jennifer Schmitz <jschm...@nvidia.com>
Co-Authored-By: Dhruv Chawla <dhr...@nvidia.com>
gcc/ChangeLog:
* config/aarch64/aarch64-cores.def (olympus): Use olympus tuning
model.
* config/aarch64/aarch64.cc: Include olympus.h.
* config/aarch64/tuning_models/olympus.h: New file.
---
gcc/config/aarch64/aarch64-cores.def | 2 +-
gcc/config/aarch64/aarch64.cc | 1 +
gcc/config/aarch64/tuning_models/olympus.h | 210 +++++++++++++++++++++
3 files changed, 212 insertions(+), 1 deletion(-)
create mode 100644 gcc/config/aarch64/tuning_models/olympus.h
diff --git a/gcc/config/aarch64/aarch64-cores.def
b/gcc/config/aarch64/aarch64-cores.def
index 8040409d283..6f11cc0983a 100644
--- a/gcc/config/aarch64/aarch64-cores.def
+++ b/gcc/config/aarch64/aarch64-cores.def
@@ -224,7 +224,7 @@ AARCH64_CORE("neoverse-v3ae", neoversev3ae, cortexa57,
V9_2A, (SVE2_BITPERM, RNG
AARCH64_CORE("demeter", demeter, cortexa57, V9A, (I8MM, BF16, SVE2_BITPERM,
RNG, MEMTAG, PROFILE), neoversev2, 0x41, 0xd4f, -1)
/* NVIDIA ('N') cores. */
-AARCH64_CORE("olympus", olympus, cortexa57, V9_2A, (SVE2_BITPERM, RNG, LS64,
MEMTAG, PROFILE, FAMINMAX, FP8FMA, FP8DOT2, FP8DOT4, LUT, SVE2_AES, SVE2_SHA3,
SVE2_SM4), neoversev3, 0x4e, 0x10, -1)
+AARCH64_CORE("olympus", olympus, cortexa57, V9_2A, (SVE2_BITPERM, RNG, LS64,
MEMTAG, PROFILE, FAMINMAX, FP8FMA, FP8DOT2, FP8DOT4, LUT, SVE2_AES, SVE2_SHA3,
SVE2_SM4), olympus, 0x4e, 0x10, -1)
/* Armv9-A big.LITTLE processors. */
AARCH64_CORE("gb10", gb10, cortexa57, V9_2A, (SVE2_BITPERM, SVE2_AES,
SVE2_SHA3, SVE2_SM4, MEMTAG, PROFILE), cortexx925, 0x41, AARCH64_BIG_LITTLE
(0xd85, 0xd87), -1)
diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 0485f695941..58fef7198ba 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -429,6 +429,7 @@ static const struct aarch64_flag_desc
aarch64_tuning_flags[] =
#include "tuning_models/neoversev2.h"
#include "tuning_models/neoversev3.h"
#include "tuning_models/neoversev3ae.h"
+#include "tuning_models/olympus.h"
#include "tuning_models/a64fx.h"
#include "tuning_models/fujitsu_monaka.h"
diff --git a/gcc/config/aarch64/tuning_models/olympus.h
b/gcc/config/aarch64/tuning_models/olympus.h
new file mode 100644
index 00000000000..268789db019
--- /dev/null
+++ b/gcc/config/aarch64/tuning_models/olympus.h
@@ -0,0 +1,210 @@
+/* Tuning model description for the NVIDIA Olympus core.
+ Copyright The GNU Toolchain Authors.
+
+ This file is part of GCC.
+
+ GCC is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ GCC is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_AARCH64_H_OLYMPUS
+#define GCC_AARCH64_H_OLYMPUS
+
+#include "generic.h"
+
+static struct cpu_regmove_cost olympus_regmove_cost =
+{
+ 1, /* GP2GP */
+ /* Spilling to int<->fp instead of memory is recommended so set
+ realistic costs compared to memmov_cost. */
+ 3, /* GP2FP */
+ 3, /* FP2GP */
+ 2 /* FP2FP */
+};
+
+static advsimd_vec_cost olympus_advsimd_vector_cost =
+{
+ 2, /* int_stmt_cost */
+ 2, /* fp_stmt_cost */
+ 2, /* ld2_st2_permute_cost */
+ 2, /* ld3_st3_permute_cost */
+ 3, /* ld4_st4_permute_cost */
+ 2, /* permute_cost */
+ 5, /* reduc_i8_cost */
+ 3, /* reduc_i16_cost */
+ 3, /* reduc_i32_cost */
+ 2, /* reduc_i64_cost */
+ 4, /* reduc_f16_cost */
+ 4, /* reduc_f32_cost */
+ 4, /* reduc_f64_cost */
+ 2, /* store_elt_extra_cost */
+ 8, /* vec_to_scalar_cost */
+ 4, /* scalar_to_vec_cost */
+ 6, /* align_load_cost */
+ 6, /* unalign_load_cost */
+ 1, /* unalign_store_cost */
+ 1 /* store_cost */
+};
+
+static sve_vec_cost olympus_sve_vector_cost =
+{
+ {
+ 2, /* int_stmt_cost */
+ 2, /* fp_stmt_cost */
+ 2, /* ld2_st2_permute_cost */
+ 3, /* ld3_st3_permute_cost */
+ 3, /* ld4_st4_permute_cost */
+ 2, /* permute_cost */
+ 9, /* reduc_i8_cost */
+ 8, /* reduc_i16_cost */
+ 6, /* reduc_i32_cost */
+ 2, /* reduc_i64_cost */
+ 8, /* reduc_f16_cost */
+ 6, /* reduc_f32_cost */
+ 4, /* reduc_f64_cost */
+ 2, /* store_elt_extra_cost */
+ 8, /* vec_to_scalar_cost */
+ 4, /* scalar_to_vec_cost */
+ 4, /* align_load_cost */
+ 6, /* unalign_load_cost */
+ 1, /* unalign_store_cost */
+ 1 /* store_cost */
+ },
+ 3, /* clast_cost */
+ 10, /* fadda_f16_cost */
+ 6, /* fadda_f32_cost */
+ 4, /* fadda_f64_cost */
+ 14, /* gather_load_x32_cost */
+ 12, /* gather_load_x64_cost */
+ 42, /* gather_load_x32_init_cost */
+ 24, /* gather_load_x64_init_cost */
+ 1 /* scatter_store_elt_cost */
+};
+
+static aarch64_scalar_vec_issue_info olympus_scalar_issue_info =
+{
+ 4, /* loads_stores_per_cycle */
+ 2, /* stores_per_cycle */
+ 8, /* general_ops_per_cycle */
+ 0, /* fp_simd_load_general_ops */
+ 1 /* fp_simd_store_general_ops */
+};
+
+static aarch64_advsimd_vec_issue_info olympus_advsimd_issue_info =
+{
+ {
+ 3, /* loads_stores_per_cycle */
+ 2, /* stores_per_cycle */
+ 6, /* general_ops_per_cycle */
+ 0, /* fp_simd_load_general_ops */
+ 1 /* fp_simd_store_general_ops */
+ },
+ 2, /* ld2_st2_general_ops */
+ 2, /* ld3_st3_general_ops */
+ 3 /* ld4_st4_general_ops */
+};
+
+static aarch64_sve_vec_issue_info olympus_sve_issue_info =
+{
+ {
+ {
+ 3, /* loads_stores_per_cycle */
+ 2, /* stores_per_cycle */
+ 6, /* general_ops_per_cycle */
+ 0, /* fp_simd_load_general_ops */
+ 1 /* fp_simd_store_general_ops */
+ },
+ 2, /* ld2_st2_general_ops */
+ 2, /* ld3_st3_general_ops */
+ 3 /* ld4_st4_general_ops */
+ },
+ 2, /* pred_ops_per_cycle */
+ 1, /* while_pred_ops */
+ 0, /* int_cmp_pred_ops */
+ 0, /* fp_cmp_pred_ops */
+ 1, /* gather_scatter_pair_general_ops */
+ 1 /* gather_scatter_pair_pred_ops */
+};
+
+static aarch64_vec_issue_info olympus_vec_issue_info =
+{
+ &olympus_scalar_issue_info,
+ &olympus_advsimd_issue_info,
+ &olympus_sve_issue_info
+};
+
+/* Olympus costs for vector insn classes. */
+static struct cpu_vector_cost olympus_vector_cost =
+{
+ 1, /* scalar_int_stmt_cost */
+ 2, /* scalar_fp_stmt_cost */
+ 4, /* scalar_load_cost */
+ 1, /* scalar_store_cost */
+ 1, /* cond_taken_branch_cost */
+ 1, /* cond_not_taken_branch_cost */
+ &olympus_advsimd_vector_cost, /* advsimd */
+ &olympus_sve_vector_cost, /* sve */
+ &olympus_vec_issue_info /* issue_info */
+};
+
+/* Olympus prefetch settings (which disable prefetch). */
+static cpu_prefetch_tune olympus_prefetch_tune =
+{
+ 0, /* num_slots */
+ -1, /* l1_cache_size */
+ 64, /* l1_cache_line_size */
+ -1, /* l2_cache_size */
+ true, /* prefetch_dynamic_strides */
+ -1, /* minimum_stride */
+ -1 /* default_opt_level */
+};
+
+static struct tune_params olympus_tunings =
+{
+ &cortexa76_extra_costs,
+ &generic_armv9_a_addrcost_table,
+ &olympus_regmove_cost,
+ &olympus_vector_cost,
+ &generic_branch_cost,
+ &generic_approx_modes,
+ SVE_128, /* sve_width */
+ { 4, /* load_int. */
+ 1, /* store_int. */
+ 6, /* load_fp. */
+ 3, /* store_fp. */
+ 5, /* load_pred. */
+ 1 /* store_pred. */
+ }, /* memmov_cost. */
+ 10, /* issue_rate */
+ AARCH64_FUSE_NEOVERSE_BASE, /* fusible_ops */
+ "32:16", /* function_align. */
+ "4", /* jump_align. */
+ "32:16", /* loop_align. */
+ 8, /* int_reassoc_width. */
+ 6, /* fp_reassoc_width. */
+ 4, /* fma_reassoc_width. */
+ 6, /* vec_reassoc_width. */
+ 2, /* min_div_recip_mul_sf. */
+ 2, /* min_div_recip_mul_df. */
+ 0, /* max_case_values. */
+ tune_params::AUTOPREFETCHER_WEAK, /* autoprefetcher_model. */
+ (AARCH64_EXTRA_TUNE_BASE
+ | AARCH64_EXTRA_TUNE_CSE_SVE_VL_CONSTANTS
+ | AARCH64_EXTRA_TUNE_MATCHED_VECTOR_THROUGHPUT
+ | AARCH64_EXTRA_TUNE_AVOID_PRED_RMW), /* tune_flags. */
+ &olympus_prefetch_tune,
+ AARCH64_LDP_STP_POLICY_ALWAYS, /* ldp_policy_model. */
+ AARCH64_LDP_STP_POLICY_ALWAYS /* stp_policy_model. */
+};
+
+#endif /* GCC_AARCH64_H_OLYMPUS. */
--
2.34.1
