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>

diff --git a/src/runtime/asm_loong64.s b/src/runtime/asm_loong64.s
index c6e46f5f69285c54152a43df3c49c9189568889c..7391fb1338b0c81505aaf3353b75948848e0dc6e 100644 (file)
--- a/src/runtime/asm_loong64.s
+++ b/src/runtime/asm_loong64.s
@@ -91,9 +91,8 @@ TEXT runtime·mstart(SB),NOSPLIT|TOPFRAME,$0
        RET // not reached
 
 // func cputicks() int64
-TEXT runtime·cputicks(SB),NOSPLIT,$0-8
+TEXT runtime·cputicks<ABIInternal>(SB),NOSPLIT,$0-8
        RDTIMED R0, R4
-       MOVV    R4, ret+0(FP)
        RET
 
 /*
@@ -213,19 +212,19 @@ noswitch:
        JMP     (R4)
 
 // func switchToCrashStack0(fn func())
-TEXT runtime·switchToCrashStack0(SB), NOSPLIT, $0-8
-       MOVV    fn+0(FP), REGCTXT       // context register
-       MOVV    g_m(g), R4      // curm
+TEXT runtime·switchToCrashStack0<ABIInternal>(SB),NOSPLIT,$0-8
+       MOVV    R4, REGCTXT     // context register
+       MOVV    g_m(g), R5      // curm
 
        // set g to gcrash
        MOVV    $runtime·gcrash(SB), g // g = &gcrash
        JAL     runtime·save_g(SB)
-       MOVV    R4, g_m(g)      // g.m = curm
-       MOVV    g, m_g0(R4)     // curm.g0 = g
+       MOVV    R5, g_m(g)      // g.m = curm
+       MOVV    g, m_g0(R5)     // curm.g0 = g
 
        // switch to crashstack
-       MOVV    (g_stack+stack_hi)(g), R4
-       ADDV    $(-4*8), R4, R3
+       MOVV    (g_stack+stack_hi)(g), R5
+       ADDV    $(-4*8), R5, R3
 
        // call target function
        MOVV    0(REGCTXT), R6