Thanks for confirming, Peter. I've opened up a new issue https://github.com/golang/go/issues/76866 On Tuesday, 16 December 2025 at 23:11:51 UTC peterGo wrote:
> Stephen, > > Old Intel i3-3220T and new Intel Ultra 7 258V. > > --- > > Intel i3-3220T: > > ~/go/src$ ./all.bash > > ##### Test execution environment. > # GOARCH: amd64 > # CPU: Intel(R) Core(TM) i3-3220T CPU @ 2.80GHz > # GOOS: linux > # OS Version: Linux 6.8.0-90-generic #91-Ubuntu SMP PREEMPT_DYNAMIC Tue > Nov 18 14:14:30 UTC 2025 x86_64 > > > ##### GOEXPERIMENT=simd go test simd/archsimd/... > ok simd/archsimd 0.018s > SIGILL: illegal instruction > PC=0x548760 m=0 sigcode=2 > > instruction bytes: 0xc5 0xfd 0xfd 0xc1 0xc3 0xcc 0xcc 0xcc 0xcc 0xcc 0xcc > 0xcc 0xcc 0xcc 0xcc 0xcc > > ~/go/src$ go version > go version go1.26-devel_65b71c11d4 Tue Dec 16 13:08:47 2025 -0800 > linux/amd64 > > Intel® Core™ i3-3220T Processor > > https://www.intel.com/content/www/us/en/products/sku/65694/intel-core-i33220t-processor-3m-cache-2-80-ghz/specifications.html > Specifications > Advanced Technologies > Instruction Set Extensions > Intel® SSE4.1, Intel® SSE4.2, Intel® AVX > > AND > > Intel Ultra 7 258V: > > ~/go/src$ ./all.bash > > ##### Test execution environment. > # GOARCH: amd64 > # CPU: Intel(R) Core(TM) Ultra 7 258V > # GOOS: linux > # OS Version: Linux 6.14.0-37-generic #37~24.04.1-Ubuntu SMP > PREEMPT_DYNAMIC Thu Nov 20 10:25:38 UTC 2 x86_64 > > > ##### GOEXPERIMENT=simd go test simd/archsimd/... > ok simd/archsimd 0.006s > SIGILL: illegal instruction > PC=0x57ba1c m=7 sigcode=2 > instruction bytes: 0x62 0xf2 0x75 0x8 0x50 0xd0 0x90 0x90 0x90 0xc5 0xfa > 0x7f 0x54 0x24 0x60 0x31 > > ~/go/src$ go version > go version go1.26-devel_65b71c11d4 Tue Dec 16 13:08:47 2025 -0800 > linux/amd64 > > Intel® Core™ Ultra 7 Processor 258V > > https://www.intel.com/content/www/us/en/products/sku/240957/intel-core-ultra-7-processor-258v-12m-cache-up-to-4-80-ghz/specifications.html > Advanced Technologies > Instruction Set Extensions > Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 > > Peter > > > On Tuesday, December 16, 2025 at 4:25:48 PM UTC-5 Stephen Illingworth > wrote: > >> I'm building Go1.26rc1 from source (all.bash) >> >> The testing phase fails with the SIMD test. >> >> ##### GOEXPERIMENT=simd go test simd/archsimd/... >> ok simd/archsimd 0.096s >> SIGILL: illegal instruction >> PC=0x548760 m=2 sigcode=2 >> instruction bytes: 0xc5 0xfd 0xfd 0xc1 0xc3 0xcc 0xcc 0xcc 0xcc 0xcc 0xcc >> 0xcc 0xcc 0xcc 0xcc 0xcc >> >> I have an older amd64 CPU (i3-3225) which has limited SIMD instructions. >> >> >> With regards to testing, all tests following this failure are "skipped >> due to earlier error" >> >> Should GOEXPERIMENT tests be an automatic part of the test suite? (I >> hadn't specified any GOEXPERIMENTs) >> >> >> >> >> -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/golang-nuts/1287769b-f854-4629-bcc3-460d102e4a76n%40googlegroups.com.
