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From: Yinyu Cai <caiyinyu@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] LoongArch: Micro-optimize LD_PCREL Date: Tue, 29 Aug 2023 04:33:10 +0000 (GMT) [thread overview] Message-ID: <20230829043310.756AF3857731@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3efa26749e4d28768558330353dc15c6f325ed4e commit 3efa26749e4d28768558330353dc15c6f325ed4e Author: Xi Ruoyao <xry111@xry111.site> Date: Sun Aug 27 00:36:51 2023 +0800 LoongArch: Micro-optimize LD_PCREL We are requiring Binutils >= 2.41, so explicit relocation syntax is always supported by the assembler. Use it to reduce one instruction. Signed-off-by: Xi Ruoyao <xry111@xry111.site> Diff: --- sysdeps/unix/sysv/linux/loongarch/pointer_guard.h | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/sysdeps/unix/sysv/linux/loongarch/pointer_guard.h b/sysdeps/unix/sysv/linux/loongarch/pointer_guard.h index b25e353b37..d6c78687d4 100644 --- a/sysdeps/unix/sysv/linux/loongarch/pointer_guard.h +++ b/sysdeps/unix/sysv/linux/loongarch/pointer_guard.h @@ -19,17 +19,15 @@ #ifndef POINTER_GUARD_H #define POINTER_GUARD_H -/* Load a got-relative EXPR into G, using T. - Note G and T are register names. */ +/* Load a got-relative EXPR into register G. */ #define LD_GLOBAL(G, EXPR) \ la.global G, EXPR; \ REG_L G, G, 0; -/* Load a pc-relative EXPR into G, using T. - Note G and T are register names. */ +/* Load a pc-relative EXPR into register G. */ #define LD_PCREL(G, EXPR) \ - la.pcrel G, EXPR; \ - REG_L G, G, 0; + pcalau12i G, %pc_hi20(EXPR); \ + REG_L G, G, %pc_lo12(EXPR); #if (IS_IN (rtld) \ || (!defined SHARED && (IS_IN (libc) \
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