s390: add alignment hints to vector load and store (142c52d7) · Commits · 戴 / test

The z14 introduced alignment hints to increase the performance of vector loads and stores. The kernel uses an implicit alignmenet of 8 bytes for the vector registers, set the alignment hint to 3. Reviewed-by:

Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:

Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/vx-insn.h

+4 −4

Original line number	Diff line number	Diff line
		@@ -363,23 +363,23 @@
		.endm

		/* VECTOR LOAD MULTIPLE */
		.macro VLM vfrom, vto, disp, base
		.macro VLM vfrom, vto, disp, base, hint=3
		VX_NUM v1, \vfrom
		VX_NUM v3, \vto
		GR_NUM b2, \base /* Base register */
		.word 0xE700 \| ((v1&15) << 4) \| (v3&15)
		.word (b2 << 12) \| (\disp)
		MRXBOPC 0, 0x36, v1, v3
		MRXBOPC \hint, 0x36, v1, v3
		.endm

		/* VECTOR STORE MULTIPLE */
		.macro VSTM vfrom, vto, disp, base
		.macro VSTM vfrom, vto, disp, base, hint=3
		VX_NUM v1, \vfrom
		VX_NUM v3, \vto
		GR_NUM b2, \base /* Base register */
		.word 0xE700 \| ((v1&15) << 4) \| (v3&15)
		.word (b2 << 12) \| (\disp)
		MRXBOPC 0, 0x3E, v1, v3
		MRXBOPC \hint, 0x3E, v1, v3
		.endm

		/* VECTOR PERMUTE */

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