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

FRECPE (vector, 2D)

Test 1: uops

Code:

  frecpe v0.2d, v0.2d
  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)03mmu table walk data (08)l2 tlb miss data (0b)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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037230006119002510001000100010445113018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
10043037230006119002510001000100010445103018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
10043037230006119002510001000100010445113018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
10043037230006119002510001000100010445113018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
10043037220006119002510001000100010445113018303730372738328951000100010003037303711100110001073116112919100030383038303830383038
10043037230006119002510001000100010445103018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
10043037220006119002510001000100010445113018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
10043037230006119002510001000100010445103018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
10043037230006119002510001000100010445103018303730372738328951000100010003037303711100110000073116112919100030383038303830383038
1004303723000611900251000100010001044510301830373037273832895100010001000303730371110011000010873116112919100030383038303830383038

Test 2: Latency 1->2

Code:

  frecpe v0.2d, 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): 3.0037

retire uop (01)cycle (02)0318191e3f4e51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250012611990025101001001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003003830038300383003830038
10204300372250006119900251010010010000100100005001067451300183003730037286231628745101002001000020010000300373003711102011009910010010000100107101161129919100001003003830038300383003830038
1020430037225000611990025101001001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003003830038300383003830038
1020430037225000611990025101001001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003013230038300383003830038
1020430037225000611990043101321001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003003830038300383003830038
1020430037225000611990025101001001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003003830038300383003830038
1020430037225000611990025101001001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100037101161129919100001003003830038300383003830038
1020430037225000611990025101001001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003003830038300383003830038
1020430037225000611990025101001001000010010000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003013230038300853003830038
1020430037225000611990025101001001000010210000500106745130018300373003728588328745101002001000020010000300373003711102011009910010010000100007101161129919100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 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)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250004006119900251001010100001010000501067451030018300373003728610328767100102010000201000030037300371110021109101010000100000006403162229919010000103003830038300383003830038
10024300372250000006119900251001010100001010000501067451030018300373003728610328767100102010000201000030037300371110021109101010000100000006402162229919010000103003830038300383003830038
10024300372250000006119900251001010100001010000501067451030018300373003728610328767100102010000201000030037300371110021109101010000100000006402162229919010000103003830038300383003830038
10024300372250000006119900251001010100001010000501067451030018300373003728610328767100102010000201000030037300371110021109101010000100000006402162229919010000103003830038300383003830038
10024300372240100006119900251001010100001010000501067451130018300373003728610328895100102010000201000030037300371110021109101010000100000006402162229919010000103003830231300383003830038
10024300372250100006119900251001010100001010000551067451130018300373003728610328767100102010000201000030037300371110021109101010000100000306402162229919010000103003830038300383003830038
100243003722500000061199001351006912100561210294661068368130270303673036728734328767100962010000201000030367303688110021109101010000100003006402162229919010000103003830038300383003830038
10024300372250000006119900251001010100001010000501067451030018300373003728610328767100102010000201000030037300371110021109101010000100000006402162229919010000103003830038300383003830038
10024300372250000006119900251001010100001010000501067451130018300373003728610328767100102010000201000030037300371110021109101010000100000006402162229919010000103003830038300383003830038
10024300372250000006119900251001010100001010000501067451130018300373003728610328767100102010000201000030037300371110021109101010000100000006402162229919010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

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

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 1.0005

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)1e1f3f51schedule 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)6061696d6emap 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)cdcfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204800416000100392580100100800001008000050064000000800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080040
802048003959900088602580100100800001008000050064000010800208008880039699716699938010020080008200800088003980039118020110099100100800001000000111516800160080036800001008004080040800408004080040
80204800396000000392580100100800001008000050064000000800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080040
80204800396000000392580100100800001008000050064000000800208003980089699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080040
80204800395990000392580100100800001008000050064000000800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080040
80204800396000000392580100100800001008000050064000000800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080040
80204800395990000392580100100800001008000050064021510800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080112800001008004080040800408004080040
80204800395990000392580100100800001008000050064000000800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080040
80204801375990000392580100100800001008000050064000000800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080040
80204800395990012027362580100100800001008000050064000000800208003980039699716699938010020080008200800088003980039118020110099100100800001000000111511700160080036800001008004080040800408004080088

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 1.0005

retire uop (01)cycle (02)0318191e3f51schedule 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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024800406000005025800101080000108000050640000080020800398003969986370019800102080000208000080039800391180021109101080000100005020516428003480000108004080040800408004080040
80024800395990005025800101080000108000050640000080020800398003969986370019800102080000208000080039800391180021109101080000102005020216548003480000108004080040800408004080040
800248003960000050258001010800001080000506400000800208003980039699863700198001020800002080000800398003911800211091010800001000395020216448003480000108004080040800408004080040
80024800396000005025800101080000108000050640000080020800398003969986370019800102080000208000080039800391180021109101080000100005020216428003480000108004080040800408004080040
80024800395990005025800101080000108000050640000180020800398003969986370019800102080000208000080039800391180021109101080000100005020416248003480000108004080040800408004080040
80024800396000065025800101080000108000050640000180058800398003969986370019800102080000208000080039800391180021109101080000100005020316348003480000108004080040800408004080040
80024800395993005080800341080000108000050640000080120800398003969986370019800102080000208000080039800391180021109101080000100035020416248003480000108018980189800908004080040
80024800395992205025800581080000108000050640000080020800398003970018370019800102080000208000080039800391180021109101080000100005020416248003480000108004080040802608004080040
800248003959900015525800101080000108000050640000080020800398003969986370019800102080000208000080039800391180021109101080000100005020316448003480000108004080040800408004080040
80024800395990005025800101080000108000050640000080020800398003969986370019800102080000208000080039800391180021109101080000100005020416628003480000108004080040800408004080040