diff options
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/mkpreempt.go | 13 | ||||
| -rw-r--r-- | src/runtime/preempt_amd64.s | 7 |
2 files changed, 0 insertions, 20 deletions
diff --git a/src/runtime/mkpreempt.go b/src/runtime/mkpreempt.go index 17544d6b21..08500a90d5 100644 --- a/src/runtime/mkpreempt.go +++ b/src/runtime/mkpreempt.go @@ -264,19 +264,6 @@ func genAMD64() { l.save() - // Apparently, the signal handling code path in darwin kernel leaves - // the upper bits of Y registers in a dirty state, which causes - // many SSE operations (128-bit and narrower) become much slower. - // Clear the upper bits to get to a clean state. See issue #37174. - // It is safe here as Go code don't use the upper bits of Y registers. - p("#ifdef GOOS_darwin") - p("#ifndef hasAVX") - p("CMPB internal∕cpu·X86+const_offsetX86HasAVX(SB), $0") - p("JE 2(PC)") - p("#endif") - p("VZEROUPPER") - p("#endif") - lSSE.save() p("CALL ·asyncPreempt2(SB)") lSSE.restore() diff --git a/src/runtime/preempt_amd64.s b/src/runtime/preempt_amd64.s index 94a84fb74c..8e3ed0d7c5 100644 --- a/src/runtime/preempt_amd64.s +++ b/src/runtime/preempt_amd64.s @@ -27,13 +27,6 @@ TEXT ·asyncPreempt(SB),NOSPLIT|NOFRAME,$0-0 MOVQ R13, 88(SP) MOVQ R14, 96(SP) MOVQ R15, 104(SP) - #ifdef GOOS_darwin - #ifndef hasAVX - CMPB internal∕cpu·X86+const_offsetX86HasAVX(SB), $0 - JE 2(PC) - #endif - VZEROUPPER - #endif MOVUPS X0, 112(SP) MOVUPS X1, 128(SP) MOVUPS X2, 144(SP) |