From: Xi Ruoyao <xry111@xry111.site>
Date: Sun, 26 Nov 2023 11:49:48 +0000 (+0800)
Subject: LoongArch64 assembly pack: Really implement OPENSSL_rdtsc
X-Git-Tag: openssl-3.3.0-alpha1~452
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a607546e6e4e2f96df707324fe892342594cd7ff;p=thirdparty%2Fopenssl.git

LoongArch64 assembly pack: Really implement OPENSSL_rdtsc

LoongArch [rdtimel.w][1] instruction reads the low 32 bits of the
64-bit stable counter, implement OPENSSL_rdtsc with it instead of always
returning 0.

[1]:https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#_rdtimelh_w_rdtime_d

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22823)
---

diff --git a/crypto/loongarch64cpuid.pl b/crypto/loongarch64cpuid.pl
index d16a8e98f22..8a84caca923 100644
--- a/crypto/loongarch64cpuid.pl
+++ b/crypto/loongarch64cpuid.pl
@@ -101,8 +101,8 @@ $code.=<<___;
 .globl OPENSSL_rdtsc
 .type   OPENSSL_rdtsc,\@function
 OPENSSL_rdtsc:
-    move    $a0,$zero
-    jr      $ra
+    rdtimel.w $a0,$zero
+    jr        $ra
 ___
 }