From 61b03ade93b0f47dd888cd5228f017979c494263 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Wed, 15 Sep 2021 14:15:10 +0800 Subject: [PATCH] x86: Update -mtune=tremont Initial -mtune=tremont update 1. Use Haswell scheduling model. 2. Assume that stack engine allows to execute push&pop instructions in parall. 3. Prepare for scheduling pass as -mtune=generic. 4. Use the same issue rate as -mtune=generic. 5. Enable partial_reg_dependency. 6. Disable accumulate_outgoing_args 7. Enable use_leave 8. Enable push_memory 9. Disable four_jump_limit 10. Disable opt_agu 11. Disable avoid_lea_for_addr 12. Disable avoid_mem_opnd_for_cmove 13. Enable misaligned_move_string_pro_epilogues 14. Enable use_cltd 16. Enable avoid_false_dep_for_bmi 17. Enable avoid_mfence 18. Disable expand_abs 19. Enable sse_typeless_stores 20. Enable sse_load0_by_pxor 21. Disable split_mem_opnd_for_fp_converts 22. Disable slow_pshufb 23. Enable partial_reg_dependency This is the first patch to tune for Tremont. With all patches applied, performance impacts on SPEC CPU 2017 are: 500.perlbench_r 1.81% 502.gcc_r 0.57% 505.mcf_r 1.16% 520.omnetpp_r 0.00% 523.xalancbmk_r 0.00% 525.x264_r 4.55% 531.deepsjeng_r 0.00% 541.leela_r 0.39% 548.exchange2_r 1.13% 557.xz_r 0.00% geomean for intrate 0.95% 503.bwaves_r 0.00% 507.cactuBSSN_r 6.94% 508.namd_r 12.37% 510.parest_r 1.01% 511.povray_r 3.70% 519.lbm_r 36.61% 521.wrf_r 8.79% 526.blender_r 2.91% 527.cam4_r 6.23% 538.imagick_r 0.28% 544.nab_r 21.99% 549.fotonik3d_r 3.63% 554.roms_r -1.20% geomean for fprate 7.50% gcc/ChangeLog * common/config/i386/i386-common.c: Use Haswell scheduling model for Tremont. * config/i386/i386.c (ix86_sched_init_global): Prepare for Tremont scheduling pass. * config/i386/x86-tune-sched.c (ix86_issue_rate): Change Tremont issue rate to 4. (ix86_adjust_cost): Handle Tremont. * config/i386/x86-tune.def (X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY): Enable for Tremont. (X86_TUNE_USE_LEAVE): Likewise. (X86_TUNE_PUSH_MEMORY): Likewise. (X86_TUNE_MISALIGNED_MOVE_STRING_PRO_EPILOGUES): Likewise. (X86_TUNE_USE_CLTD): Likewise. (X86_TUNE_AVOID_FALSE_DEP_FOR_BMI): Likewise. (X86_TUNE_AVOID_MFENCE): Likewise. (X86_TUNE_SSE_TYPELESS_STORES): Likewise. (X86_TUNE_SSE_LOAD0_BY_PXOR): Likewise. (X86_TUNE_ACCUMULATE_OUTGOING_ARGS): Disable for Tremont. (X86_TUNE_FOUR_JUMP_LIMIT): Likewise. (X86_TUNE_OPT_AGU): Likewise. (X86_TUNE_AVOID_LEA_FOR_ADDR): Likewise. (X86_TUNE_AVOID_MEM_OPND_FOR_CMOVE): Likewise. (X86_TUNE_EXPAND_ABS): Likewise. (X86_TUNE_SPLIT_MEM_OPND_FOR_FP_CONVERTS): Likewise. (X86_TUNE_SLOW_PSHUFB): Likewise. --- gcc/common/config/i386/i386-common.c | 2 +- gcc/config/i386/i386.c | 1 + gcc/config/i386/x86-tune-sched.c | 2 ++ gcc/config/i386/x86-tune.def | 37 ++++++++++++++++++------------------ 4 files changed, 23 insertions(+), 19 deletions(-) diff --git a/gcc/common/config/i386/i386-common.c b/gcc/common/config/i386/i386-common.c index 00c65ba..2c9e1cc 100644 --- a/gcc/common/config/i386/i386-common.c +++ b/gcc/common/config/i386/i386-common.c @@ -1935,7 +1935,7 @@ const pta processor_alias_table[] = M_CPU_TYPE (INTEL_GOLDMONT), P_PROC_SSE4_2}, {"goldmont-plus", PROCESSOR_GOLDMONT_PLUS, CPU_GLM, PTA_GOLDMONT_PLUS, M_CPU_TYPE (INTEL_GOLDMONT_PLUS), P_PROC_SSE4_2}, - {"tremont", PROCESSOR_TREMONT, CPU_GLM, PTA_TREMONT, + {"tremont", PROCESSOR_TREMONT, CPU_HASWELL, PTA_TREMONT, M_CPU_TYPE (INTEL_TREMONT), P_PROC_SSE4_2}, {"knl", PROCESSOR_KNL, CPU_SLM, PTA_KNL, M_CPU_TYPE (INTEL_KNL), P_PROC_AVX512F}, diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 337ea29..afc2674 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -16976,6 +16976,7 @@ ix86_sched_init_global (FILE *, int, int) case PROCESSOR_NEHALEM: case PROCESSOR_SANDYBRIDGE: case PROCESSOR_HASWELL: + case PROCESSOR_TREMONT: case PROCESSOR_GENERIC: /* Do not perform multipass scheduling for pre-reload schedule to save compile time. */ diff --git a/gcc/config/i386/x86-tune-sched.c b/gcc/config/i386/x86-tune-sched.c index 2e5ee4e..56ada99 100644 --- a/gcc/config/i386/x86-tune-sched.c +++ b/gcc/config/i386/x86-tune-sched.c @@ -71,6 +71,7 @@ ix86_issue_rate (void) case PROCESSOR_NEHALEM: case PROCESSOR_SANDYBRIDGE: case PROCESSOR_HASWELL: + case PROCESSOR_TREMONT: case PROCESSOR_GENERIC: return 4; @@ -429,6 +430,7 @@ ix86_adjust_cost (rtx_insn *insn, int dep_type, rtx_insn *dep_insn, int cost, case PROCESSOR_NEHALEM: case PROCESSOR_SANDYBRIDGE: case PROCESSOR_HASWELL: + case PROCESSOR_TREMONT: case PROCESSOR_GENERIC: /* Stack engine allows to execute push&pop instructions in parall. */ if ((insn_type == TYPE_PUSH || insn_type == TYPE_POP) diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def index 2f221b1..385e275b 100644 --- a/gcc/config/i386/x86-tune.def +++ b/gcc/config/i386/x86-tune.def @@ -62,7 +62,7 @@ DEF_TUNE (X86_TUNE_PARTIAL_REG_DEPENDENCY, "partial_reg_dependency", that can be partly masked by careful scheduling of moves. */ DEF_TUNE (X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY, "sse_partial_reg_dependency", m_PPRO | m_P4_NOCONA | m_CORE_ALL | m_BONNELL | m_AMDFAM10 - | m_BDVER | m_ZNVER | m_GENERIC) + | m_BDVER | m_ZNVER | m_TREMONT | m_GENERIC) /* X86_TUNE_SSE_SPLIT_REGS: Set for machines where the type and dependencies are resolved on SSE register parts instead of whole registers, so we may @@ -136,7 +136,7 @@ DEF_TUNE (X86_TUNE_FUSE_ALU_AND_BRANCH, "fuse_alu_and_branch", DEF_TUNE (X86_TUNE_ACCUMULATE_OUTGOING_ARGS, "accumulate_outgoing_args", m_PPRO | m_P4_NOCONA | m_BONNELL | m_SILVERMONT | m_KNL | m_KNM | m_INTEL - | m_GOLDMONT | m_GOLDMONT_PLUS | m_TREMONT | m_ATHLON_K8) + | m_GOLDMONT | m_GOLDMONT_PLUS | m_ATHLON_K8) /* X86_TUNE_PROLOGUE_USING_MOVE: Do not use push/pop in prologues that are considered on critical path. */ @@ -150,14 +150,15 @@ DEF_TUNE (X86_TUNE_EPILOGUE_USING_MOVE, "epilogue_using_move", /* X86_TUNE_USE_LEAVE: Use "leave" instruction in epilogues where it fits. */ DEF_TUNE (X86_TUNE_USE_LEAVE, "use_leave", - m_386 | m_CORE_ALL | m_K6_GEODE | m_AMD_MULTIPLE | m_GENERIC) + m_386 | m_CORE_ALL | m_K6_GEODE | m_AMD_MULTIPLE | m_TREMONT + | m_GENERIC) /* X86_TUNE_PUSH_MEMORY: Enable generation of "push mem" instructions. Some chips, like 486 and Pentium works faster with separate load and push instructions. */ DEF_TUNE (X86_TUNE_PUSH_MEMORY, "push_memory", m_386 | m_P4_NOCONA | m_CORE_ALL | m_K6_GEODE | m_AMD_MULTIPLE - | m_GENERIC) + | m_TREMONT | m_GENERIC) /* X86_TUNE_SINGLE_PUSH: Enable if single push insn is preferred over esp subtraction. */ @@ -198,8 +199,7 @@ DEF_TUNE (X86_TUNE_PAD_RETURNS, "pad_returns", than 4 branch instructions in the 16 byte window. */ DEF_TUNE (X86_TUNE_FOUR_JUMP_LIMIT, "four_jump_limit", m_PPRO | m_P4_NOCONA | m_BONNELL | m_SILVERMONT | m_KNL | m_KNM - | m_GOLDMONT | m_GOLDMONT_PLUS | m_TREMONT | m_INTEL | m_ATHLON_K8 - | m_AMDFAM10) + | m_GOLDMONT | m_GOLDMONT_PLUS | m_INTEL | m_ATHLON_K8 | m_AMDFAM10) /*****************************************************************************/ /* Integer instruction selection tuning */ @@ -240,11 +240,11 @@ DEF_TUNE (X86_TUNE_INTEGER_DFMODE_MOVES, "integer_dfmode_moves", /* X86_TUNE_OPT_AGU: Optimize for Address Generation Unit. This flag will impact LEA instruction selection. */ DEF_TUNE (X86_TUNE_OPT_AGU, "opt_agu", m_BONNELL | m_SILVERMONT | m_KNL - | m_KNM | m_GOLDMONT | m_GOLDMONT_PLUS | m_TREMONT | m_INTEL) + | m_KNM | m_GOLDMONT | m_GOLDMONT_PLUS | m_INTEL) /* X86_TUNE_AVOID_LEA_FOR_ADDR: Avoid lea for address computation. */ DEF_TUNE (X86_TUNE_AVOID_LEA_FOR_ADDR, "avoid_lea_for_addr", - m_BONNELL | m_SILVERMONT | m_GOLDMONT | m_GOLDMONT_PLUS | m_TREMONT + m_BONNELL | m_SILVERMONT | m_GOLDMONT | m_GOLDMONT_PLUS | m_KNL | m_KNM) /* X86_TUNE_SLOW_IMUL_IMM32_MEM: Imul of 32-bit constant and memory is @@ -263,7 +263,7 @@ DEF_TUNE (X86_TUNE_SLOW_IMUL_IMM8, "slow_imul_imm8", a conditional move. */ DEF_TUNE (X86_TUNE_AVOID_MEM_OPND_FOR_CMOVE, "avoid_mem_opnd_for_cmove", m_BONNELL | m_SILVERMONT | m_GOLDMONT | m_GOLDMONT_PLUS | m_KNL - | m_KNM | m_TREMONT | m_INTEL) + | m_KNM | m_INTEL) /* X86_TUNE_SINGLE_STRINGOP: Enable use of single string operations, such as MOVS and STOS (without a REP prefix) to move/set sequences of bytes. */ @@ -282,7 +282,8 @@ DEF_TUNE (X86_TUNE_PREFER_KNOWN_REP_MOVSB_STOSB, FIXME: This may actualy be a win on more targets than listed here. */ DEF_TUNE (X86_TUNE_MISALIGNED_MOVE_STRING_PRO_EPILOGUES, "misaligned_move_string_pro_epilogues", - m_386 | m_486 | m_CORE_ALL | m_AMD_MULTIPLE | m_GENERIC) + m_386 | m_486 | m_CORE_ALL | m_AMD_MULTIPLE | m_TREMONT + | m_GENERIC) /* X86_TUNE_USE_SAHF: Controls use of SAHF. */ DEF_TUNE (X86_TUNE_USE_SAHF, "use_sahf", @@ -294,7 +295,7 @@ DEF_TUNE (X86_TUNE_USE_SAHF, "use_sahf", /* X86_TUNE_USE_CLTD: Controls use of CLTD and CTQO instructions. */ DEF_TUNE (X86_TUNE_USE_CLTD, "use_cltd", ~(m_PENT | m_LAKEMONT | m_BONNELL | m_SILVERMONT | m_KNL | m_KNM | m_INTEL - | m_K6 | m_GOLDMONT | m_GOLDMONT_PLUS | m_TREMONT)) + | m_K6 | m_GOLDMONT | m_GOLDMONT_PLUS)) /* X86_TUNE_USE_BT: Enable use of BT (bit test) instructions. */ DEF_TUNE (X86_TUNE_USE_BT, "use_bt", @@ -305,7 +306,7 @@ DEF_TUNE (X86_TUNE_USE_BT, "use_bt", /* X86_TUNE_AVOID_FALSE_DEP_FOR_BMI: Avoid false dependency for bit-manipulation instructions. */ DEF_TUNE (X86_TUNE_AVOID_FALSE_DEP_FOR_BMI, "avoid_false_dep_for_bmi", - m_SANDYBRIDGE | m_CORE_AVX2 | m_GENERIC) + m_SANDYBRIDGE | m_CORE_AVX2 | m_TREMONT | m_GENERIC) /* X86_TUNE_ADJUST_UNROLL: This enables adjusting the unroll factor based on hardware capabilities. Bdver3 hardware has a loop buffer which makes @@ -321,14 +322,14 @@ DEF_TUNE (X86_TUNE_ONE_IF_CONV_INSN, "one_if_conv_insn", /* X86_TUNE_AVOID_MFENCE: Use lock prefixed instructions instead of mfence. */ DEF_TUNE (X86_TUNE_AVOID_MFENCE, "avoid_mfence", - m_CORE_ALL | m_BDVER | m_ZNVER | m_GENERIC) + m_CORE_ALL | m_BDVER | m_ZNVER | m_TREMONT | m_GENERIC) /* X86_TUNE_EXPAND_ABS: This enables a new abs pattern by generating instructions for abs (x) = (((signed) x >> (W-1) ^ x) - (signed) x >> (W-1)) instead of cmove or SSE max/abs instructions. */ DEF_TUNE (X86_TUNE_EXPAND_ABS, "expand_abs", m_CORE_ALL | m_SILVERMONT | m_KNL | m_KNM | m_GOLDMONT - | m_GOLDMONT_PLUS | m_TREMONT ) + | m_GOLDMONT_PLUS) /*****************************************************************************/ /* 387 instruction selection tuning */ @@ -386,13 +387,13 @@ DEF_TUNE (X86_TUNE_SSE_PACKED_SINGLE_INSN_OPTIMAL, "sse_packed_single_insn_optim /* X86_TUNE_SSE_TYPELESS_STORES: Always movaps/movups for 128bit stores. */ DEF_TUNE (X86_TUNE_SSE_TYPELESS_STORES, "sse_typeless_stores", - m_AMD_MULTIPLE | m_CORE_ALL | m_GENERIC) + m_AMD_MULTIPLE | m_CORE_ALL | m_TREMONT | m_GENERIC) /* X86_TUNE_SSE_LOAD0_BY_PXOR: Always use pxor to load0 as opposed to xorps/xorpd and other variants. */ DEF_TUNE (X86_TUNE_SSE_LOAD0_BY_PXOR, "sse_load0_by_pxor", m_PPRO | m_P4_NOCONA | m_CORE_ALL | m_BDVER | m_BTVER | m_ZNVER - | m_GENERIC) + | m_TREMONT | m_GENERIC) /* X86_TUNE_INTER_UNIT_MOVES_TO_VEC: Enable moves in from integer to SSE registers. If disabled, the moves will be done by storing @@ -419,7 +420,7 @@ DEF_TUNE (X86_TUNE_INTER_UNIT_CONVERSIONS, "inter_unit_conversions", fp converts to destination register. */ DEF_TUNE (X86_TUNE_SPLIT_MEM_OPND_FOR_FP_CONVERTS, "split_mem_opnd_for_fp_converts", m_SILVERMONT | m_KNL | m_KNM | m_GOLDMONT | m_GOLDMONT_PLUS - | m_TREMONT | m_INTEL) + | m_INTEL) /* X86_TUNE_USE_VECTOR_FP_CONVERTS: Prefer vector packed SSE conversion from FP to FP. This form of instructions avoids partial write to the @@ -434,7 +435,7 @@ DEF_TUNE (X86_TUNE_USE_VECTOR_CONVERTS, "use_vector_converts", m_AMDFAM10) /* X86_TUNE_SLOW_SHUFB: Indicates tunings with slow pshufb instruction. */ DEF_TUNE (X86_TUNE_SLOW_PSHUFB, "slow_pshufb", m_BONNELL | m_SILVERMONT | m_KNL | m_KNM | m_GOLDMONT - | m_GOLDMONT_PLUS | m_TREMONT | m_INTEL) + | m_GOLDMONT_PLUS | m_INTEL) /* X86_TUNE_AVOID_4BYTE_PREFIXES: Avoid instructions requiring 4+ bytes of prefixes. */ DEF_TUNE (X86_TUNE_AVOID_4BYTE_PREFIXES, "avoid_4byte_prefixes", -- 2.7.4