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| author | Cherry Mui <cherryyz@google.com> | 2021-06-09 14:29:20 -0400 |
|---|---|---|
| committer | Cherry Mui <cherryyz@google.com> | 2021-06-11 20:52:41 +0000 |
| commit | c93d5d1a5245d4baa6824a2c88a6b79e3d895e4d (patch) | |
| tree | cdf4a2cba2535025be65dd368bdd0aaf93d233b9 /src/runtime/sys_linux_amd64.s | |
| parent | 2fe324858b31a672070f8529191d0769013b8488 (diff) | |
| download | go-c93d5d1a5245d4baa6824a2c88a6b79e3d895e4d.tar.xz | |
[dev.typeparams] all: always enable regabig on AMD64
Always enable regabig on AMD64, which enables the G register and
the X15 zero register. Remove the fallback path.
Also remove the regabig GOEXPERIMENT. On AMD64 it is always
enabled (this CL). Other architectures already have a G register,
except for 386, where there are too few registers and it is
unlikely that we will reserve one. (If we really do, we can just
add a new experiment).
Change-Id: I229cac0060f48fe58c9fdaabd38d6fa16b8a0855
Reviewed-on: https://go-review.googlesource.com/c/go/+/327272
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Diffstat (limited to 'src/runtime/sys_linux_amd64.s')
| -rw-r--r-- | src/runtime/sys_linux_amd64.s | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/src/runtime/sys_linux_amd64.s b/src/runtime/sys_linux_amd64.s index f22b7ad928..64ddc2354e 100644 --- a/src/runtime/sys_linux_amd64.s +++ b/src/runtime/sys_linux_amd64.s @@ -215,13 +215,7 @@ TEXT runtime·nanotime1(SB),NOSPLIT,$16-8 MOVQ SP, R12 // Save old SP; R12 unchanged by C code. -#ifdef GOEXPERIMENT_regabig MOVQ g_m(R14), BX // BX unchanged by C code. -#else - get_tls(CX) - MOVQ g(CX), AX - MOVQ g_m(AX), BX // BX unchanged by C code. -#endif // Set vdsoPC and vdsoSP for SIGPROF traceback. // Save the old values on stack and restore them on exit, @@ -236,11 +230,7 @@ TEXT runtime·nanotime1(SB),NOSPLIT,$16-8 MOVQ CX, m_vdsoPC(BX) MOVQ DX, m_vdsoSP(BX) -#ifdef GOEXPERIMENT_regabig CMPQ R14, m_curg(BX) // Only switch if on curg. -#else - CMPQ AX, m_curg(BX) // Only switch if on curg. -#endif JNE noswitch MOVQ m_g0(BX), DX |