File 2001-src-common-crc32c_intel_fast.patch of Package ceph-ceph-15.2.17

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File 2001-src-common-crc32c_intel_fast.patch of Package ceph-ceph-15.2.17

--- ceph-15.2.2/src/common/crc32c_intel_fast_zero_asm.s.orig	2020-05-26 08:34:32.226201974 -0400
+++ ceph-15.2.2/src/common/crc32c_intel_fast_zero_asm.s	2020-05-26 17:19:32.497201974 -0400
@@ -1,5 +1,5 @@
 ;
-; Copyright 2012-2013 Intel Corporation All Rights Reserved.
+; Copyright 2012-2015 Intel Corporation All Rights Reserved.
 ; All rights reserved.
 ;
 ; http://opensource.org/licenses/BSD-3-Clause
@@ -59,6 +59,19 @@
 	xor     rbx, rbx                ;; rbx = crc1 = 0;
 	xor     r10, r10                ;; r10 = crc2 = 0;
 
+	cmp	len, %%bSize*3*2
+	jbe	%%non_prefetch
+
+ %assign i 0
+ %rep %%bSize/8 - 1
+	crc32   rax, bufptmp  ;; update crc0
+	crc32   rbx, bufptmp  ;; update crc1
+	crc32   r10, bufptmp  ;; update crc2
+	%assign i (i+8)
+ %endrep
+	jmp %%next %+ %1
+
+%%non_prefetch:
  %assign i 0
  %rep %%bSize/8 - 1
 	crc32   rax, bufptmp  ;; update crc0
@@ -66,6 +79,8 @@
 	crc32   r10, bufptmp  ;; update crc2
 	%assign i (i+8)
  %endrep
+
+%%next %+ %1:
 	crc32   rax, bufptmp  ;; update crc0
 	crc32   rbx, bufptmp  ;; update crc1
 ; SKIP  ;crc32  r10, bufptmp  ;; update crc2
@@ -180,12 +195,15 @@
 %define crc_init_dw     r8d
 %endif
 
-
+	endbranch
 	push    rdi
 	push    rbx
 
 	mov     rax, crc_init           ;; rax = crc_init;
 
+	cmp	len, 8
+	jb	less_than_8
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; 1) ALIGN: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

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File 2001-src-common-crc32c_intel_fast.patch of Package ceph-ceph-15.2.17

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