OSchip
/
llvm-project
mirror of https://github.com/THU-DSP-LAB/llvm-project.git
13
0
Fork 2
Code Issues Packages Projects Releases Wiki Activity

[X86] Improve LOOP/LOOPE/LOOPNE schedule on SandyBridge model 

D138359 was reporting that this override was superfluous, but it had never been setup - I took the numbers from uops.info (I couldn't find an estimate in Intel docs).
This commit is contained in:
Simon Pilgrim 2022-11-20 12:13:02 +00:00
parent 420d02bb55
commit 357f1c4ef1
4 changed files with 35 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
llvm/lib/Target/X86/X86SchedSandyBridge.td
View File

@ -615,7 +615,6 @@ def SBWriteResGroup2 : SchedWriteRes<[SBPort5]> {
}
def: InstRW<[SBWriteResGroup2], (instrs FDECSTP, FINCSTP, FFREE, FFREEP, FNOP,
LD_Frr, ST_Frr, ST_FPrr)>;
def: InstRW<[SBWriteResGroup2], (instrs LOOP, LOOPE, LOOPNE)>; // FIXME: This seems wrong compared to other Intel CPUs.
def: InstRW<[SBWriteResGroup2], (instrs RET64)>;
def SBWriteResGroup4 : SchedWriteRes<[SBPort05]> {
@ -736,6 +735,20 @@ def SBWriteResGroup29_2 : SchedWriteRes<[SBPort5,SBPort015]> {
}
def: InstRW<[SBWriteResGroup29_2], (instrs PAUSE)>;
def SBWriteResGroup30 : SchedWriteRes<[SBPort1,SBPort5,SBPort015]> {
let Latency = 3;
let NumMicroOps = 8;
let ResourceCycles = [1,3,4];
}
def: InstRW<[SBWriteResGroup30], (instrs LOOP)>;
def SBWriteResGroup31 : SchedWriteRes<[SBPort1,SBPort5,SBPort015,SBPort05]> {
let Latency = 4;
let NumMicroOps = 12;
let ResourceCycles = [1,3,6,2];
}
def: InstRW<[SBWriteResGroup31], (instrs LOOPE, LOOPNE)>;
def SBWriteResGroup76 : SchedWriteRes<[SBPort05]> {
let Latency = 5;
let NumMicroOps = 8;

14
llvm/test/tools/llvm-mca/X86/Barcelona/resources-x86_64.s
View File

@ -1394,9 +1394,9 @@ xorq (%rax), %rdi
# CHECK-NEXT: 3 7 0.67 U lodsw (%rsi), %ax
# CHECK-NEXT: 2 6 0.50 U lodsl (%rsi), %eax
# CHECK-NEXT: 2 6 0.50 U lodsq (%rsi), %rax
# CHECK-NEXT: 1 1 1.00 U loop 0
# CHECK-NEXT: 1 1 1.00 U loope 0
# CHECK-NEXT: 1 1 1.00 U loopne 0
# CHECK-NEXT: 8 3 3.00 U loop 0
# CHECK-NEXT: 12 4 4.00 U loope 0
# CHECK-NEXT: 12 4 4.00 U loopne 0
# CHECK-NEXT: 5 8 1.00 U movsb (%rsi), %es:(%rdi)
# CHECK-NEXT: 5 8 1.00 U movsw (%rsi), %es:(%rdi)
# CHECK-NEXT: 5 8 1.00 U movsl (%rsi), %es:(%rdi)
@ -1960,7 +1960,7 @@ xorq (%rax), %rdi
# CHECK: Resource pressure per iteration:
# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6.0] [6.1]
# CHECK-NEXT: 160.00 - 658.17 310.67 361.00 686.17 455.50 455.50
# CHECK-NEXT: 160.00 - 665.50 319.00 361.00 699.50 455.50 455.50
# CHECK: Resource pressure by instruction:
# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6.0] [6.1] Instructions:
@ -2324,9 +2324,9 @@ xorq (%rax), %rdi
# CHECK-NEXT: - - 0.67 0.67 - 0.67 0.50 0.50 lodsw (%rsi), %ax
# CHECK-NEXT: - - 0.33 0.33 - 0.33 0.50 0.50 lodsl (%rsi), %eax
# CHECK-NEXT: - - 0.33 0.33 - 0.33 0.50 0.50 lodsq (%rsi), %rax
# CHECK-NEXT: - - - - - 1.00 - - loop 0
# CHECK-NEXT: - - - - - 1.00 - - loope 0
# CHECK-NEXT: - - - - - 1.00 - - loopne 0
# CHECK-NEXT: - - 1.33 2.33 - 4.33 - - loop 0
# CHECK-NEXT: - - 3.00 3.00 - 6.00 - - loope 0
# CHECK-NEXT: - - 3.00 3.00 - 6.00 - - loopne 0
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsb (%rsi), %es:(%rdi)
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsw (%rsi), %es:(%rdi)
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsl (%rsi), %es:(%rdi)

14
llvm/test/tools/llvm-mca/X86/Generic/resources-x86_64.s
View File

@ -1394,9 +1394,9 @@ xorq (%rax), %rdi
# CHECK-NEXT: 3 7 0.67 U lodsw (%rsi), %ax
# CHECK-NEXT: 2 6 0.50 U lodsl (%rsi), %eax
# CHECK-NEXT: 2 6 0.50 U lodsq (%rsi), %rax
# CHECK-NEXT: 1 1 1.00 U loop 0
# CHECK-NEXT: 1 1 1.00 U loope 0
# CHECK-NEXT: 1 1 1.00 U loopne 0
# CHECK-NEXT: 8 3 3.00 U loop 0
# CHECK-NEXT: 12 4 4.00 U loope 0
# CHECK-NEXT: 12 4 4.00 U loopne 0
# CHECK-NEXT: 5 8 1.00 U movsb (%rsi), %es:(%rdi)
# CHECK-NEXT: 5 8 1.00 U movsw (%rsi), %es:(%rdi)
# CHECK-NEXT: 5 8 1.00 U movsl (%rsi), %es:(%rdi)
@ -1960,7 +1960,7 @@ xorq (%rax), %rdi
# CHECK: Resource pressure per iteration:
# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6.0] [6.1]
# CHECK-NEXT: 160.00 - 658.17 310.67 361.00 686.17 455.50 455.50
# CHECK-NEXT: 160.00 - 665.50 319.00 361.00 699.50 455.50 455.50
# CHECK: Resource pressure by instruction:
# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6.0] [6.1] Instructions:
@ -2324,9 +2324,9 @@ xorq (%rax), %rdi
# CHECK-NEXT: - - 0.67 0.67 - 0.67 0.50 0.50 lodsw (%rsi), %ax
# CHECK-NEXT: - - 0.33 0.33 - 0.33 0.50 0.50 lodsl (%rsi), %eax
# CHECK-NEXT: - - 0.33 0.33 - 0.33 0.50 0.50 lodsq (%rsi), %rax
# CHECK-NEXT: - - - - - 1.00 - - loop 0
# CHECK-NEXT: - - - - - 1.00 - - loope 0
# CHECK-NEXT: - - - - - 1.00 - - loopne 0
# CHECK-NEXT: - - 1.33 2.33 - 4.33 - - loop 0
# CHECK-NEXT: - - 3.00 3.00 - 6.00 - - loope 0
# CHECK-NEXT: - - 3.00 3.00 - 6.00 - - loopne 0
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsb (%rsi), %es:(%rdi)
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsw (%rsi), %es:(%rdi)
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsl (%rsi), %es:(%rdi)

14
llvm/test/tools/llvm-mca/X86/SandyBridge/resources-x86_64.s
View File

@ -1394,9 +1394,9 @@ xorq (%rax), %rdi
# CHECK-NEXT: 3 7 0.67 U lodsw (%rsi), %ax
# CHECK-NEXT: 2 6 0.50 U lodsl (%rsi), %eax
# CHECK-NEXT: 2 6 0.50 U lodsq (%rsi), %rax
# CHECK-NEXT: 1 1 1.00 U loop 0
# CHECK-NEXT: 1 1 1.00 U loope 0
# CHECK-NEXT: 1 1 1.00 U loopne 0
# CHECK-NEXT: 8 3 3.00 U loop 0
# CHECK-NEXT: 12 4 4.00 U loope 0
# CHECK-NEXT: 12 4 4.00 U loopne 0
# CHECK-NEXT: 5 8 1.00 U movsb (%rsi), %es:(%rdi)
# CHECK-NEXT: 5 8 1.00 U movsw (%rsi), %es:(%rdi)
# CHECK-NEXT: 5 8 1.00 U movsl (%rsi), %es:(%rdi)
@ -1960,7 +1960,7 @@ xorq (%rax), %rdi
# CHECK: Resource pressure per iteration:
# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6.0] [6.1]
# CHECK-NEXT: 160.00 - 658.17 310.67 361.00 686.17 455.50 455.50
# CHECK-NEXT: 160.00 - 665.50 319.00 361.00 699.50 455.50 455.50
# CHECK: Resource pressure by instruction:
# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6.0] [6.1] Instructions:
@ -2324,9 +2324,9 @@ xorq (%rax), %rdi
# CHECK-NEXT: - - 0.67 0.67 - 0.67 0.50 0.50 lodsw (%rsi), %ax
# CHECK-NEXT: - - 0.33 0.33 - 0.33 0.50 0.50 lodsl (%rsi), %eax
# CHECK-NEXT: - - 0.33 0.33 - 0.33 0.50 0.50 lodsq (%rsi), %rax
# CHECK-NEXT: - - - - - 1.00 - - loop 0
# CHECK-NEXT: - - - - - 1.00 - - loope 0
# CHECK-NEXT: - - - - - 1.00 - - loopne 0
# CHECK-NEXT: - - 1.33 2.33 - 4.33 - - loop 0
# CHECK-NEXT: - - 3.00 3.00 - 6.00 - - loope 0
# CHECK-NEXT: - - 3.00 3.00 - 6.00 - - loopne 0
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsb (%rsi), %es:(%rdi)
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsw (%rsi), %es:(%rdi)
# CHECK-NEXT: - - 0.67 0.67 1.00 0.67 1.00 1.00 movsl (%rsi), %es:(%rdi)