Apple M1 Microarchitecture Research by Dougall Johnson

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

UQADD (vector, 2S)

Test 1: uops

Code:

  uqadd v0.2s, v0.2s, v1.2s
  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)031e3f4e51inst 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
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000373116112630100030383038303830383038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
1004303723546125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372308225482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
1004303723010325482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
1004303722126125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
1004303723396125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  uqadd v0.2s, v0.2s, v1.2s
  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)03181e3f4e51inst 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)9fa0a8a9accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102043003722500612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
1020430037225004252954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722506612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722400612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722401625362954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000007102162229634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)03080b18191e1f3f4e51inst 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)9fa0a1a6a8a9acc2cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002430037225000012061295482510010131000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000046402162229630010000103003830038300383003830038
1002430037225000021061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
1002430037224000024061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722400009061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  uqadd v0.2s, v1.2s, v0.2s
  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)033f4e51inst 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)9fa6a8acbranch mispredict (cb)cdcfd0d2d5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020430037225612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038
1020430037225612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010001000710001161129634100001003003830038300383003830038
1020430037225612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038
1020430037225612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038
102043003722518952954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038
1020430037225612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038
1020430037225612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038
1020430037225612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830083
1020430037225612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038
102043003722518872954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000710001161129634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)03071e3f4e51inst 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)5e60696d6edispatch 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)9fa0a8accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10024300372240061295482510010101000010100005042773130130018300373003728287328767100102010000202000030037300371110021109101010000100006422162229630010000103003830038300383003830038
10024300372250180189295482510010101000010100005042773130030018300373003728287328767100102010000202000030037300371110021109101010000100006402162229630010000103003830038300383003830038
10024300372250061295482510012121000012100005042773130130018300373003728287328767100102010000202000030037300371110021109101010000100006403163429632210000103003830038300383003830038
10024300372250061295482510010101000010100005042773130130018300373003728287328767100102010000202000030037300371110021109101010000100006402162229630010000103003830038300383003830038
10024300372250061295482510012101000012100006042773130030018300373003728287328767100102010000202000030037300371110021109101010000100006402162329632010000103003830038300383003830038
10024300372250061295482510010101000010100005042773130130018300373003728287328767100102010000202000030037300371110021109101010000100006404164229630010000103003830038300383003830038
10024300372251061295482510010101000010100006042773130030018300373003728287328767100102010000202000030037300371110021109101010000100006402162229630010000103003830038300383003830038
10024300372250061295482510010101000010100006042773130030018300373003728287328767100102010000202000030037300371110021109101010000100006402162229630010000103003830038300383003830038
10024300372250061295482510012121000012100006042773130030018300373003728287328767100122010000202000030037300371110021109101010000100006402162229630010000103003830038300383003830038
100243003722500736295482510010101000010100005042773130130018300373003728287328767100102010000202000030037300371110021109101010000100006402162229630010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  uqadd v0.2s, v8.2s, v9.2s
  uqadd v1.2s, v8.2s, v9.2s
  uqadd v2.2s, v8.2s, v9.2s
  uqadd v3.2s, v8.2s, v9.2s
  uqadd v4.2s, v8.2s, v9.2s
  uqadd v5.2s, v8.2s, v9.2s
  uqadd v6.2s, v8.2s, v9.2s
  uqadd v7.2s, v8.2s, v9.2s
  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 (01)cycle (02)03181e1f3f51inst 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)72scheduler 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)9fa0a1a8accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000000511021611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000000511011611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000003511011611200360800001002004020040200402004020040
8020420039150000706258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000003511011611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000000511011611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000003511011611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000000511011611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000000511011611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000006511011611200360800001002004020040200402004020040
802042003915000041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000000511011611200360800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire (01)cycle (02)033f51inst 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)9fa1a8acc5cfd5d6dbddinst fetch restart (de)e0ea? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
800242003915040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020416034200365580000102004020040200402004020040
800242003915040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020316034200362280000102004020040200402004020040
800242003915040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020416043200362280000102004020040200402004020040
80024200391504025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100030502041604320036080000102004020040200402004020040
80024200391504025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100000502041604320036080000102004020040200402004020040
80024200391504025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100030502041604320036080000102004020040200402004020040
80024200391506125800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100000502041604320036080000102004020040200402004020040
80024200391504025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100000502041604420036080000102004020040200402004020040
80024200391504025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100000502031603420036080000102004020040200402004020040
800242003915040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000305020316034200362080000102004020040200402004020040