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runtime: switch cputicks and switchToCrashStack0 on loong64 to regabi
goos: linux goarch: loong64 pkg: runtime cpu: Loongson-3A6000 @ 2500.00MHz | old.bench | new.bench | | sec/op | sec/op vs base | SelectUncontended 246.6n ± 0% 247.4n ± 0% +0.32% (p=0.000 n=10) SelectSyncContended 1.458µ ± 0% 1.461µ ± 0% +0.17% (p=0.000 n=10) SelectAsyncContended 246.6n ± 0% 247.5n ± 0% +0.36% (p=0.000 n=10) SelectNonblock 32.81n ± 0% 32.81n ± 0% ~ (p=1.000 n=10) SelectProdCons 653.8n ± 0% 652.2n ± 0% -0.24% (p=0.010 n=10) GoroutineSelect 2.204m ± 0% 2.172m ± 0% -1.46% (p=0.000 n=10) GoroutineForRange 1.775m ± 0% 1.748m ± 0% -1.54% (p=0.000 n=10) geomean 3.573µ 3.561µ -0.34% Change-Id: I6337cad72369e77e378b6e9bec6521d71b3f4fc5 Reviewed-on: https://go-review.googlesource.com/c/go/+/610175 Reviewed-by: Meidan Li <limeidan@loongson.cn> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Tim King <taking@google.com> Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn> Reviewed-by: Qiqi Huang <huangqiqi@loongson.cn> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Auto-Submit: Tim King <taking@google.com>
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@ -91,9 +91,8 @@ TEXT runtime·mstart(SB),NOSPLIT|TOPFRAME,$0
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RET // not reached
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// func cputicks() int64
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TEXT runtime·cputicks(SB),NOSPLIT,$0-8
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TEXT runtime·cputicks<ABIInternal>(SB),NOSPLIT,$0-8
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RDTIMED R0, R4
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MOVV R4, ret+0(FP)
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RET
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/*
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@ -213,19 +212,19 @@ noswitch:
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JMP (R4)
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// func switchToCrashStack0(fn func())
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TEXT runtime·switchToCrashStack0(SB), NOSPLIT, $0-8
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MOVV fn+0(FP), REGCTXT // context register
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MOVV g_m(g), R4 // curm
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TEXT runtime·switchToCrashStack0<ABIInternal>(SB),NOSPLIT,$0-8
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MOVV R4, REGCTXT // context register
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MOVV g_m(g), R5 // curm
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// set g to gcrash
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MOVV $runtime·gcrash(SB), g // g = &gcrash
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JAL runtime·save_g(SB)
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MOVV R4, g_m(g) // g.m = curm
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MOVV g, m_g0(R4) // curm.g0 = g
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MOVV R5, g_m(g) // g.m = curm
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MOVV g, m_g0(R5) // curm.g0 = g
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// switch to crashstack
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MOVV (g_stack+stack_hi)(g), R4
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ADDV $(-4*8), R4, R3
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MOVV (g_stack+stack_hi)(g), R5
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ADDV $(-4*8), R5, R3
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// call target function
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MOVV 0(REGCTXT), R6
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