/* SPDX-License-Identifier: GPL-2.0 */ /* csum_copy.S: Checksum+copy code for sparc64 * * Copyright (C) 2005 David S. Miller <davem@davemloft.net> 90 :/* We checked for zero length already, so there must be * at least one byte. 1 f0 x00, %o4))1 , %o0sub %o2, 1 , %o20 x00))1 , %o11 : andcc %o0, 0 x2, %g080 f2 60 f0 x00, %o5))2 , %o0sub %o2, 2 , %o20 x00))2 , %o180 f/* %o0=src, %o1=dst, %o2=len */ 0 x000, #n_reads)1 , %o3clr %o40 x3, %g095 f0 x040, #n_reads)70 f0 x3, %g0/* We "remember" whether the lowest bit in the address * was set in GLOBAL_SPARE. Because if it is, we have to swap * upper and lower 8 bit fields of the sum we calculate. 90 b0 x1, GLOBAL_SPARE80 :0 x080, #n_reads)0 x3f, %g30 x0c0, #n_reads)sub %o2, %g3, %o22 f0 x100, #n_reads)/* So that we don't need to use the non-pairing * add-with-carry instructions we accumulate 32-bit * values into a 64-bit register. At the end of the * loop we fold it down to 32-bits and so on. 1 f0 x140, #n_reads)align 32 1 : EX_LD(LOAD(lduw, %o0 + 0 x00, %o5))0 x04, %g1))0 x08, %g2))0 x00))0 x0c, %o5))0 x04))0 x10, %g1))0 x08))0 x14, %g2))0 x0c))0 x18, %o5))0 x10))0 x1c, %g1))0 x14))0 x20, %g2))0 x18))0 x24, %o5))0 x1c))0 x28, %g1))0 x20))0 x2c, %g2))0 x24))0 x30, %o5))0 x28))0 x34, %g1))0 x2c))0 x38, %g2))0 x30))0 x3c, %o5))0 x34))0 x180, #n_reads)0 x38))0 x40, %g30 x40, %o00 x3c))1 b0 x40, %o12 : and %o2, 0 x3c, %g32 fsub %o2, %g3, %o21 : EX_LD(LOAD(lduw, %o0 + 0 x00, %o5))0 x4, %g30 x4, %o00 x00))1 b0 x4, %o12 :/* fold 64-->32 */ srlx %o4, 32 , %o5srl %o4, 0 , %o4srlx %o4, 32 , %o5srl %o4, 0 , %o4/* fold 32-->16 */ sethi %hi (0 xffff0000), %g1srl %o4, 16 , %o5srl %o4, 16 , %o560 :/* %o4 has the 16-bit sum we have calculated so-far. */ 2 1 f0 x00, %o5))sub %o2, 2 , %o22 , %o00 x00))0 x2, %o11 : brz,pt %o2, 1 f0 x00, %o5))sub %o2, 1 , %o21 , %o00 x00))sllx %o5, 8 , %o51 , %o11 :/* fold 32-->16 */ sethi %hi (0 xffff0000), %g1srl %o4, 16 , %o5srl %o4, 16 , %o51 : brz,pt GLOBAL_SPARE, 1 f/* We started with an odd byte, byte-swap the result. */ srl %o4, 8 , %o50 xff, %g1sll %g1, 8 , %g11 : addcc %o3, %o4, %o370 :srl %o3, 0 , %o095 : mov 0 , GLOBAL_SPARE4 f1 , %o5 1 fsrl %o2, 1 , %g1 sub %o2, 1 , %o2 1 , %o0 srl %o2, 1 , %g11 , %o11 : brz,a,pn %g1, 3 f1 , %g02 , %g0 1 fsrl %g1, 1 , %g1sub %o2, 2 , %o2 srl %o4, 8 , %g2sub %g1, 1 , %g1 1 ))2 , %o0 srl %g1, 1 , %g12 , %o11 : brz,a,pn %g1, 2 f 2 , %g05 : srl %o4, 24 , %g2srl %o4, 16 , %g3srl %o4, 8 , %g21 ))4 , %o02 ))3 ))4 , %o11 , %g15 bsll GLOBAL_SPARE, 16 , %g2srl GLOBAL_SPARE, 16 , GLOBAL_SPAREsrl %g2, 16 , %g22 , %g02 : be,a,pt %icc, 3 f 1 , %g01 , %g0srl %o4, 8 , %g22 , %o0 1 ))2 , %o13 : be,a,pt %icc, 1 f sll GLOBAL_SPARE, 16 , %o4sll %g2, 8 , %o4 sll GLOBAL_SPARE, 16 , %o41 : addcc %o4, GLOBAL_SPARE, GLOBAL_SPAREsrl GLOBAL_SPARE, 16 , %o44 fsrl GLOBAL_SPARE, 8 , %o40 xff, %g20 xff, %o4sll %g2, 8 , %g24 : addcc %o3, GLOBAL_SPARE, %o3srl %o0, 0 , %o0size FUNC_NAME, .-FUNC_NAME
Messung V0.5 in Prozent C=96 H=92 G=93
