Agner's CPU blog

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Testp and github

Last post by agner « 2024-10-31, 15:32:35
Replies: 1
by alto_gmx » 2024-10-31, 11:50:04

1 Replies

3962 Views

Last post by agner
2024-10-31, 15:32:35
Is using BSF instruction instead of using GNU C __builtin_ctz inefficient?

Last post by agner « 2023-12-25, 8:34:40
Replies: 1
by pauljurczak » 2023-12-25, 7:35:06

1 Replies

31552 Views

Last post by agner
2023-12-25, 8:34:40
Efficiency of array<Vec32uc, 8> vs. ContainerV<Vec32uc, 8>

Last post by agner « 2023-12-23, 15:21:10
Replies: 1
by pauljurczak » 2023-12-23, 6:33:45

1 Replies

23413 Views

Last post by agner
2023-12-23, 15:21:10
Intel's "cripple AMD" function

Last post by agner « 2023-09-06, 10:06:59
Replies: 6
by agner » 2019-12-30, 12:35:23

6 Replies

367928 Views

Last post by agner
2023-09-06, 10:06:59
Suggestion: Stop using "vector" for computer science

Last post by agner « 2023-08-27, 5:39:08
Replies: 1
by freelancer_U » 2023-08-26, 14:22:31

1 Replies

36788 Views

Last post by agner
2023-08-27, 5:39:08
Testp Question

Last post by agner « 2023-08-25, 6:22:49
Replies: 1
by mineiro » 2023-08-25, 3:13:11

1 Replies

35834 Views

Last post by agner
2023-08-25, 6:22:49
Intel AVX10 & APX announcement

Last post by Vladislav_152378 « 2023-07-31, 14:31:51
Replies: 7
by Vladislav_152378 » 2023-07-30, 2:50:37

7 Replies

217349 Views

Last post by Vladislav_152378
2023-07-31, 14:31:51
AMD processors do allow you to change the CPUID string

Last post by agner « 2023-07-20, 17:17:54
Replies: 1
by Neville C » 2023-07-20, 16:01:01

1 Replies

40517 Views

Last post by agner
2023-07-20, 17:17:54
VZEROUPPER issue with Zen4 in 32-bit mode?

Last post by slowjuggler « 2023-07-14, 16:55:11
Replies: 3
by jkivilin » 2023-06-03, 16:10:59

3 Replies

83848 Views

Last post by slowjuggler
2023-07-14, 16:55:11
Branch Predictor and Instruction Pipelining, how can I prove the existence of it?

Last post by agner « 2023-04-18, 6:09:05
Replies: 3
by 王家才 » 2023-02-10, 20:01:26

3 Replies

66220 Views

Last post by agner
2023-04-18, 6:09:05
AMD Zen 4 Ryzen 7000 series with AVX-512 support

Last post by Vladislav_152378 « 2023-04-07, 22:17:58
Replies: 10
by mniem » 2022-08-02, 20:53:36
1

2
10 Replies

184974 Views

Last post by Vladislav_152378
2023-04-07, 22:17:58
AMD 'heavy equipment' CPUs

Last post by DamageX « 2022-12-27, 20:41:33
Replies: 1
by DamageX » 2022-12-05, 20:01:05

1 Replies

48025 Views

Last post by DamageX
2022-12-27, 20:41:33
Question about your Testp

Last post by agner « 2022-11-20, 6:22:08
Replies: 1
by hinggor » 2022-11-20, 2:22:48

1 Replies

48068 Views

Last post by agner
2022-11-20, 6:22:08
Which C++ compiler is best?

Last post by Rustom « 2022-09-19, 12:31:12
Replies: 3
by agner » 2022-08-09, 8:35:04

3 Replies

76192 Views

Last post by Rustom
2022-09-19, 12:31:12
C++ Vector class library

Last post by agner « 2022-08-07, 9:53:28
Replies: 5
by agner » 2019-12-30, 7:15:57

5 Replies

109453 Views

Last post by agner
2022-08-07, 9:53:28
inconsistent port usage about CALL vs PUSH&JMP

Last post by katsu « 2022-07-23, 13:49:46
Replies: 2
by katsu » 2022-07-23, 8:46:28

2 Replies

70822 Views

Last post by katsu
2022-07-23, 13:49:46
Intel's new Chimera: Alder Lake

Last post by agner « 2022-06-28, 6:35:28
Replies: 14
by agner » 2022-04-24, 16:56:59
1

2
14 Replies

708431 Views

Last post by agner
2022-06-28, 6:35:28
AVX or SSE code performance question

Last post by agner « 2022-04-30, 12:02:34
Replies: 1
by enuinc » 2022-04-30, 8:18:00

1 Replies

55206 Views

Last post by agner
2022-04-30, 12:02:34
INTEL X86，why do align access and non-align access have same performance?

Last post by agner « 2021-12-20, 12:28:04
Replies: 1
by hankin » 2021-12-20, 9:03:58

1 Replies

55292 Views

Last post by agner
2021-12-20, 12:28:04
ARMV8 fundamental data type atomicity

Last post by hankin « 2021-12-20, 11:36:13
Replies: 2
by hankin » 2021-12-10, 16:34:48

2 Replies

62072 Views

Last post by hankin
2021-12-20, 11:36:13
Forwardcom: A project towards the ideal computer

Last post by agner « 2021-11-06, 16:04:41
Replies: 7
by agner » 2019-12-30, 6:53:45

7 Replies

155844 Views

Last post by agner
2021-11-06, 16:04:41
Clarification on Intel Haswell microarchitecture pipeline

Last post by cianfa72 « 2021-11-04, 16:12:01
Replies: 2
by cianfa72 » 2021-11-03, 18:08:01

2 Replies

65536 Views

Last post by cianfa72
2021-11-04, 16:12:01
Memory load μops on P4/P4E microarchitecture

Last post by cianfa72 « 2021-11-04, 15:50:17
Replies: 2
by cianfa72 » 2021-11-04, 10:32:24

2 Replies

64144 Views

Last post by cianfa72
2021-11-04, 15:50:17
Intel Floating Point Executing 3 to 4 Times Faster Than it Should. MAKES NO SENSE

Last post by agner « 2021-11-01, 12:09:04
Replies: 4
by Elhardt » 2021-10-04, 5:09:12

4 Replies

92611 Views

Last post by agner
2021-11-01, 12:09:04
Two 5800X Questions

Last post by richieadam « 2021-10-01, 16:44:52

by richieadam » 2021-10-01, 16:44:52

0 Replies

80244 Views

Last post by richieadam
2021-10-01, 16:44:52

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