Apple M1 Microarchitecture Research by Dougall Johnson

Firestorm: Overview | Base Instructions | SIMD and FP Instructions
Icestorm:  Overview | Base Instructions | SIMD and FP Instructions

SMINV (vector, 8H)

Test 1: uops

Code:

  sminv h0, v0.8h
  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 (01)cycle (02)03081e3f4e51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op fp/simd (7e)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
1004303722006125472510001000100039816013018303730372414328951000100020003037303711100110000073316332629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100020003037303711100110000073216332629100030383038303830383038
100430372200612547251000100010003981601301830373037241432895100010002000303730371110011000015073316332629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100020003037303711100110000073316332629100030383038303830383038
1004303722006125472510001000100039816013018303730372414328951000100020003037303711100110000073316332629100030383038303830383038
1004303722006125472510001000100039816013018303730372414328951000100020003037303711100110000073316332629100030383038303830383038
1004303722006125472510001000100039816013018303730372414328951000100020003037303711100110000073316332629100030383038303830383038
1004303722006125472510001000100039816003018303730372414328951000100020003037303711100110000073216232629100030383038303830383038
1004303722006125472510001000100039816003018303730372414328951000100020003037303711100110000073316332629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100020003037303711100110000073316332629100030383038303830383038

Test 2: Latency 1->2

Code:

  sminv h0, v0.8h
  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 (01)cycle (02)031e3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696b6d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a8cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102043003722502662954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129780100001003003830038300383003830038
10204300372240612954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
102043003722501242954725101001001000010010000500427716003001803003730037282643287451010020010000200200003003730037111020110099100100100001000007101161129633100001003003830038300383003830038
102043003722405362954725101001001000010010000500427716013001833003730037282643287451010020010000200200003003730037111020110099100100100001000017101161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)0307080a0b18191e1f3a3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a6a7a8a9acc2cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10024300372320000000006129538811001010100081010000664277160030018300373003728286112893310010201000020200003017630037111002110910101000010002010006404165529629010000103003830038300383003830038
10024300372320000001501612954713410010101000010100005042771600301263003730037282863287671001020100002020000300373003711100211091010100001000000000810109681029991310000103051430549307953098130976
1002430894247202017162151160401080329457208101041510088211088261428932803023830462303172831643289351100226111472422302303683032581100211091010100001044010422198273010148101029847210000103036830370304193083530368
10024300372352000106145288006490294482131009322100962011200934308256030378305113036828328452889711514201099620200003003730037111002110910101000010420110306405165529629510000103003830038301703050930038
1002430037232210000132917607712952925100101010000101150050427716003001830037300372828632876710010221115020200003003730037111002110910101000010000000006405164629629010000103003830038300383003830038
1002430037233002094000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000000006406166529629010000103003830038300383003830038
10024300372320000000006129547251001010100001010000504277160030018300373003728286328767100102010000202000030037300852110021109101010000100000000064012806529629010000103003830038300383003830038
10024300372250000000005362954725100101010000101000050427716003001830037300372828632876710010201000020203323003730037111002110910101000010000012606405166529629010000103008630038300863003830038
1002430037232000000000612954725100101010000101000055427716003001830037300372828632876710010201000020200003003730037111002110910101000010000000006405165529629010000103003830038300383003830038
1002430037224000000000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000000006405165529629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sminv h0, v8.8h
  sminv h1, v8.8h
  sminv h2, v8.8h
  sminv h3, v8.8h
  sminv h4, v8.8h
  sminv h5, v8.8h
  sminv h6, v8.8h
  sminv h7, v8.8h
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2506

retire (01)cycle (02)031e3a3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)696b6d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8acc5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8020420058150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640820200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080116500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020088
8020420039150003025801081008000810080020500640132200200200392003999776999080120200800322001600642003920039118020110099100100800001000011151182160020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire (01)cycle (02)030708090b18191e1f3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a6a8a9acc2cfd5d6daddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
80024200511500000000082258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050206160752003680000102004020040200402004020040
800242003915000000012040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050205160572003680000102004020040200402004020040
80024200391500000000040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050205160752003680000102004020040200402004020040
80024200391500000030040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050205160752003680000102004020040200402004020040
800242003915000000000705258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050455160772003680000102004020040200402004020040
80024200391500000000040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000009050945160772003680000102004020040200402004020040
80024200391500000000040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050207160752003680000102004020040200402004020040
80024200391500000000040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050207160752003680000102004020040200402004020040
80024200391500000000040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050205160572003680000102004020040200402004020040
80024200391500000000040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000000050205160572003680000102004020040200402004020040