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

SSHL (vector, 2D)

Test 1: uops

Code:

  sshl v0.2d, v0.2d, v1.2d
  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)031e3f4e51schedule 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)l1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
100420371548611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
100420371566611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
100420371518611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037156611687251000100010002646800201820372037157231895100010002000203720371110011000273116111787100020382038203820382038
10042037159611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  sshl v0.2d, v0.2d, v1.2d
  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)18191e1f3a3f4e51schedule 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)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150000000008219687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680020018200372003718422318745101002061000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
1020420037151000000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680120126200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
1020420037150000009006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
10204200371500000021006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
102042003715000000435006119687251010010010000100100005002847680120018200372003718422318745101002001017220020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)191e1f3f4e51schedule 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)60696b6d6emap 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 miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000024061196872510010101000010100005028476801200180200372003718444318767100102010000202000020037200371110021109101010000100010006402162219785010000102003820038200382003820038
100242003715000000726196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
10024200371500006061196872510010101000010100005028476800200180200372003718444318767101642010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
10024200371500000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
10024200371500000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
100242003715000000147196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
10024200371500000061196872510010101000010100005028476801200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
10024200371500000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
10024200371500000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219851010000102003820038200382003820038
1002420037150000210061196872510010101000010100005028476801200180200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  sshl v0.2d, v1.2d, v0.2d
  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)031e3f4e51schedule 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)696d6emap 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)acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715002961968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
102042003715036611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
102042003715018841968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161120034100001002003820038200382003820038
102042003715007261968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100050007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037150228611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100030007101161119791100001002003820038200382003820038
10204200371500821968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)1e3f4e51schedule 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)60696b6d6emap 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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242008415113010319687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010010640216221978510000102003820038200382003820038
100242003715001210319687251001010100001110000502847680020018020037200371844431876710010201000020200002003720037111002110910101000010010640216221978510000102003820038200382003820038
10024200371500786119687251001010100001010000502847680020018020037200371844431876710010201000020200002003720037111002110910101000010003640216221978510000102003820038200382003820038
10024200371500366119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680020018020037200371844431876710010201000020200002003720037111002110910101000010003640216221978510000102003820038200382003820038
10024200371500156119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010220640216221978510000102003820038200382008620038
1002420037150036119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
1002420037150096119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
10024200371500156119687251001010100001010000502847680020018020037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
10024200371500696119687251001010100001010000552847680120018020037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  sshl v0.2d, v8.2d, v9.2d
  sshl v1.2d, v8.2d, v9.2d
  sshl v2.2d, v8.2d, v9.2d
  sshl v3.2d, v8.2d, v9.2d
  sshl v4.2d, v8.2d, v9.2d
  sshl v5.2d, v8.2d, v9.2d
  sshl v6.2d, v8.2d, v9.2d
  sshl v7.2d, v8.2d, v9.2d
  movi v8.16b, 9
  movi v9.16b, 10

(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)03mmu table walk data (08)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)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591500038402452580100100800001008000050064000002006920038200389973399968010020080000200160000200382003811802011009910010080000100000000051148169920035800001002003920039200392003920039
8020420038150000002452580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100000000051149169920035800001002003920039200392003920039
80204200381490001202452580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100000000051149169920035800001002003920039200392003920039
8020420038150000002452580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100000030051147167720035800001002003920039200392003920039
80204200381500009024525801001008000010080000500640000120019200382003899733100238010020080000200160000200922003811802011009910010080000100005000051149167720035800001002003920039200982009020039
80204200381501036024525801001008000010080000500640000020019201932019499731210153807142008058420216116620192203497180201100991001008000010020122823005220161029920035800001002003920039200392003920039
80204200381500004502452580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100000000051149169920035800001002003920039200392003920039
8020420038150000300287258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010004000005114416101020085800001002003920039200392003920039
802042003815000030024525801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511495291120035800001002003920039200392003920039
80204200861610100024525801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511416169920035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3f51schedule 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)accfd0d5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420047150231392580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010000502007167520035080000102003920039200392003920039
80024200381500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502005167520035080000102003920039200392003920039
800242003815066392580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010009502007167520035080000102003920039200392003920039
8002420038150967042580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502007167520035080000102003920039200392003920039
80024200381500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502007167520035080000102003920039200392003920039
800242003815024392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502005167720035880000102003920039200392003920039
80024200381500392580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010000502007168520035080000102003920039200392003920039
800242003815015392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502005167520035080000102003920039200392003920039
8002420038150275142580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010000502005167520035080000102003920039200392003920039
80024200381500392580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010000502007165720035080000102003920039200392003920039