diff options
Diffstat (limited to 'gcc/config/i386/x86-tune-costs.h')
| -rw-r--r-- | gcc/config/i386/x86-tune-costs.h | 57 |
1 files changed, 31 insertions, 26 deletions
diff --git a/gcc/config/i386/x86-tune-costs.h b/gcc/config/i386/x86-tune-costs.h index a4a128c..7c8cb73 100644 --- a/gcc/config/i386/x86-tune-costs.h +++ b/gcc/config/i386/x86-tune-costs.h @@ -37,34 +37,37 @@ static stringop_algs ix86_size_memset[2] = { const struct processor_costs ix86_size_cost = {/* costs for tuning for size */ { - /* Start of register allocator costs. integer->integer move cost is 2. */ - 2, /* cost for loading QImode using movzbl */ - {2, 2, 2}, /* cost of loading integer registers + /* Start of register allocator costs. integer->integer move cost is 2 + and coststs are relative to it. movl %eax, %ebx is 2 bytes, so the + sizes coincides with average size of instruction encoding. */ + 3, /* cost for loading QImode using movzbl */ + /* Typical load/save from stack frame is 4 bytes with ebp and 5 with esp. */ + {5, 6, 5}, /* cost of loading integer registers in QImode, HImode and SImode. Relative to reg-reg move (2). */ - {2, 2, 2}, /* cost of storing integer registers */ + {5, 6, 5}, /* cost of storing integer registers */ 2, /* cost of reg,reg fld/fst */ - {2, 2, 2}, /* cost of loading fp registers + {5, 6, 5}, /* cost of loading fp registers in SFmode, DFmode and XFmode */ - {2, 2, 2}, /* cost of storing fp registers + {5, 6, 5}, /* cost of storing fp registers in SFmode, DFmode and XFmode */ 3, /* cost of moving MMX register */ - {3, 3}, /* cost of loading MMX registers + {6, 6}, /* cost of loading MMX registers in SImode and DImode */ - {3, 3}, /* cost of storing MMX registers + {6, 6}, /* cost of storing MMX registers in SImode and DImode */ - 3, 3, 3, /* cost of moving XMM,YMM,ZMM register */ - {3, 3, 3, 3, 3}, /* cost of loading SSE registers + 4, 4, 6, /* cost of moving XMM,YMM,ZMM register */ + {6, 6, 6, 6, 11}, /* cost of loading SSE registers in 32,64,128,256 and 512-bit */ - {3, 3, 3, 3, 3}, /* cost of storing SSE registers + {6, 6, 6, 6, 11}, /* cost of storing SSE registers in 32,64,128,256 and 512-bit */ - 3, 3, /* SSE->integer and integer->SSE moves */ - 3, 3, /* mask->integer and integer->mask moves */ - {2, 2, 2}, /* cost of loading mask register + 4, 4, /* SSE->integer and integer->SSE moves */ + 4, 4, /* mask->integer and integer->mask moves */ + {7, 7, 7}, /* cost of loading mask register in QImode, HImode, SImode. */ - {2, 2, 2}, /* cost if storing mask register + {7, 7, 7}, /* cost if storing mask register in QImode, HImode, SImode. */ - 2, /* cost of moving mask register. */ + 4, /* cost of moving mask register. */ /* End of register allocator costs. */ }, @@ -88,22 +91,24 @@ struct processor_costs ix86_size_cost = {/* costs for tuning for size */ 0, /* "large" insn */ 2, /* MOVE_RATIO */ 2, /* CLEAR_RATIO */ - {2, 2, 2}, /* cost of loading integer registers + /* These costs are relative to reg-reg move with cost of 2. Since it has + 2 bytes, this coincides with average instruction sizes. */ + {5, 6, 5}, /* cost of loading integer registers in QImode, HImode and SImode. Relative to reg-reg move (2). */ - {2, 2, 2}, /* cost of storing integer registers */ - {3, 3, 3, 3, 3}, /* cost of loading SSE register + {5, 6, 5}, /* cost of storing integer registers */ + {6, 6, 6, 6, 11}, /* cost of loading SSE register in 32bit, 64bit, 128bit, 256bit and 512bit */ - {3, 3, 3, 3, 3}, /* cost of storing SSE register + {6, 6, 6, 6, 11}, /* cost of storing SSE register in 32bit, 64bit, 128bit, 256bit and 512bit */ - {3, 3, 3, 3, 3}, /* cost of unaligned SSE load + {6, 6, 6, 6, 11}, /* cost of unaligned SSE load in 128bit, 256bit and 512bit */ - {3, 3, 3, 3, 3}, /* cost of unaligned SSE store + {6, 6, 6, 6, 11}, /* cost of unaligned SSE store in 128bit, 256bit and 512bit */ - 3, 3, 3, /* cost of moving XMM,YMM,ZMM register */ - 3, /* cost of moving SSE register to integer. */ - 5, 0, /* Gather load static, per_elt. */ - 5, 0, /* Gather store static, per_elt. */ + 4, 4, 6, /* cost of moving XMM,YMM,ZMM register */ + 4, /* cost of moving SSE register to integer. */ + COSTS_N_BYTES (5), 0, /* Gather load static, per_elt. */ + COSTS_N_BYTES (5), 0, /* Gather store static, per_elt. */ 0, /* size of l1 cache */ 0, /* size of l2 cache */ 0, /* size of prefetch block */ |