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cpu: replace specific instructions with WORD in the function get_cpucfg on loong64

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The CPUCFG instruction on loong64 was introduced in Go1.24, which caused
compilation errors when using this feature in Go1.23 and earlier versions.

Change-Id: I68891bbfc527194ecdafebac3398e700bfb53c2f
Reviewed-on: https://go-review.googlesource.com/c/sys/+/656915
Reviewed-by: Meidan Li <limeidan@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
This commit is contained in:
Guoqi Chen
2025-03-12 17:52:00 -07:00
committed by abner chenc
parent b8f7da6c5a
commit 7401cce313
1 changed files with 2 additions and 1 deletions
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cpu/cpu_loong64.s
+2 -1
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@@ -7,6 +7,7 @@
// func get_cpucfg(reg uint32) uint32 // func get_cpucfg(reg uint32) uint32
TEXT ·get_cpucfg(SB), NOSPLIT|NOFRAME, $0 TEXT ·get_cpucfg(SB), NOSPLIT|NOFRAME, $0
MOVW reg+0(FP), R5 MOVW reg+0(FP), R5
CPUCFG R5, R4 // CPUCFG R5, R4 = 0x00006ca4
WORD $0x00006ca4
MOVW R4, ret+8(FP) MOVW R4, ret+8(FP)
RET RET