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From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Scott Wood <oss@buserror.net>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v8 23/23] powerpc32: Remove one insn in mulhdu
Date: Tue,  9 Feb 2016 17:08:33 +0100 (CET)	[thread overview]
Message-ID: <f4875d57b151fbae932fd991c5e26357e2f6a7b3.1455032446.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <cover.1455032446.git.christophe.leroy@c-s.fr>

Remove one instruction in mulhdu

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
v2: new
v3: no change
v4: no change
v5: no change
v6: no change
v8: no change

 arch/powerpc/kernel/misc_32.S | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 3ec5a22..bf5160f 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -91,17 +91,16 @@ _GLOBAL(mulhdu)
 	addc	r7,r0,r7
 	addze	r4,r4
 1:	beqlr	cr1		/* all done if high part of A is 0 */
-	mr	r10,r3
 	mullw	r9,r3,r5
-	mulhwu	r3,r3,r5
+	mulhwu	r10,r3,r5
 	beq	2f
-	mullw	r0,r10,r6
-	mulhwu	r8,r10,r6
+	mullw	r0,r3,r6
+	mulhwu	r8,r3,r6
 	addc	r7,r0,r7
 	adde	r4,r4,r8
-	addze	r3,r3
+	addze	r10,r10
 2:	addc	r4,r4,r9
-	addze	r3,r3
+	addze	r3,r10
 	blr
 
 /*
-- 
2.1.0

      parent reply	other threads:[~2016-02-09 16:08 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-09 16:07 [PATCH v8 00/23] powerpc/8xx: Use large pages for RAM and IMMR and other improvments Christophe Leroy
2016-02-09 16:07 ` [PATCH v8 01/23] powerpc/8xx: Save r3 all the time in DTLB miss handler Christophe Leroy
2016-02-09 16:07 ` [PATCH v8 02/23] powerpc/8xx: Map linear kernel RAM with 8M pages Christophe Leroy
2016-02-09 16:07 ` [PATCH v8 03/23] powerpc: Update documentation for noltlbs kernel parameter Christophe Leroy
2016-02-09 16:07 ` [PATCH v8 04/23] powerpc/8xx: move setup_initial_memory_limit() into 8xx_mmu.c Christophe Leroy
2016-02-09 16:07 ` [PATCH v8 05/23] powerpc32: Fix pte_offset_kernel() to return NULL for bad pages Christophe Leroy
2016-02-09 16:07 ` [PATCH v8 06/23] powerpc32: refactor x_mapped_by_bats() and x_mapped_by_tlbcam() together Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 07/23] powerpc/8xx: Fix vaddr for IMMR early remap Christophe Leroy
2016-03-11 22:51   ` [v8,07/23] " Scott Wood
2016-02-09 16:08 ` [PATCH v8 08/23] powerpc/8xx: Map IMMR area with 512k page at a fixed address Christophe Leroy
2016-03-11 23:15   ` [v8, " Scott Wood
2016-03-12  9:55     ` christophe leroy
2016-02-09 16:08 ` [PATCH v8 09/23] powerpc/8xx: CONFIG_PIN_TLB unneeded for CONFIG_PPC_EARLY_DEBUG_CPM Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 10/23] powerpc/8xx: map more RAM at startup when needed Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 11/23] powerpc32: Remove useless/wrong MMU:setio progress message Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 12/23] powerpc32: remove ioremap_base Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 13/23] powerpc/8xx: Add missing SPRN defines into reg_8xx.h Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 14/23] powerpc/8xx: Handle CPU6 ERRATA directly in mtspr() macro Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 15/23] powerpc/8xx: remove special handling of CPU6 errata in set_dec() Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 16/23] powerpc/8xx: rewrite set_context() in C Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 17/23] powerpc/8xx: rewrite flush_instruction_cache() " Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 18/23] powerpc: add inline functions for cache related instructions Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 19/23] powerpc32: Remove clear_pages() and define clear_page() inline Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 20/23] powerpc32: move xxxxx_dcache_range() functions inline Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 21/23] powerpc: Simplify test in __dma_sync() Christophe Leroy
2016-02-09 16:08 ` [PATCH v8 22/23] powerpc32: small optimisation in flush_icache_range() Christophe Leroy
2016-02-09 16:08 ` Christophe Leroy [this message]

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