Apple Microarchitecture Research by Dougall Johnson

M1/A14 P-core (Firestorm): Overview | Base Instructions | SIMD and FP Instructions
M1/A14 E-core (Icestorm):  Overview | Base Instructions | SIMD and FP Instructions

SHL (vector, 2D)

Test 1: uops

Code:

  shl v0.2d, v0.2d, #3
  movi v0.16b, 1
  movi v1.16b, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)03mmu table walk data (08)1e3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150061168625100010001000264521120182037203715713189510001000100020372037111001100073324221786100020382038203820382038
10042037160061168625100010001000264521120182037203715713189510001000100020372037111001100073216221786100020382038203820382038
10042037150061168625100010001000264521020182037203715713189510001000100020372037111001100073216221786100020382038203820382038
1004203715010561168625100010001000264521120182037203715713189510001000100020372037111001100073216221786100020382038203820382038
10042037150061168625100010001000264521120182037203715713189510001000100020372037111001100073216221786100020382038203820382038
10042037150061168625100010001000264521120182037203715713189510001000100020372037111001100073216221786100020382038203820382038
10042037150061168625100010001000264521120182037203715713189510001000100020372037111001100073216221786100020382038203820382038
10042037150061168625100010001000264521120182037203715713189510001000100020372037111001100073216221786100020382038203820382038
10042037160061168625100010001000264521020182037203715713189510001000100020372037111001100073216211786100020382038203820382038
10042037160061168625100010001000264521120182037203715713189510001000100020372037111001100073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  shl v0.2d, v0.2d, #3
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000000006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100004037102161119791100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000050787101161119791100001002003820038200382003820038
102042003715100000006119686251018210010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100006007101161119897100001002003820038200382003820038
1020420037150000001206119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100008007101161119791100001002003820038200382003820038
102042003715000000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100005037101161119791100001002003820038200382003820038
102042003715000000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
102042013215000000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100008007101161119791100001002003820038200382003820038
102042017815000000006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100009007101161119791100001002003820038200382003820038
102042003715000000006119686251010010010000109101525002847521020018200372003718421318745101002001000020010000200372003741102011009910010010000100004007101161119791100001002003820038200382003820038
10204200371500000000154419686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003741102011009910010010000100008007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)1e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001030640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001080640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001070640216221978610000102003820038200382003820038
1002420037151000611968625100101010000101000050284752102001820037200371844371876710010201000020100002003720037111002110910101000010490640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001013640216221978610000102003820038200382003820038
100242003714900061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003721100211091010100001031978640216221978610000102003820038200382003820038
100242003715100061196862510010101000010100007128487850200182003720037184433187671001020100002010000200372003711100211091010100001023640216221978610000102003820038200382003820038
10024200371510128861196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001016640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001013640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001026640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  shl v0.2d, v8.2d, #3
  shl v1.2d, v8.2d, #3
  shl v2.2d, v8.2d, #3
  shl v3.2d, v8.2d, #3
  shl v4.2d, v8.2d, #3
  shl v5.2d, v8.2d, #3
  shl v6.2d, v8.2d, #3
  shl v7.2d, v8.2d, #3
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)031e1f3a3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)l1d cache writeback (a8)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)dde0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200381500002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010003300111511816020035800001002003920039200392003920039
8020420038150000502580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000130111511816020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
8020420038150900292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
80204200381502100292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
80204200381500009282580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000100111511816020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3a3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000000000083258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000010305020161613102003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000005020121612122003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000010005020131613142003580000102003920039200392003920039
800242003814900000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020141614142003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020121613132003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020131613142003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020141613132003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000005020141614142003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000005020131614112003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020121612122003580000102003920139200392003920039