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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/sparc/lib/GENmemcpy.S | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | arch/sparc/lib/GENmemcpy.S | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/arch/sparc/lib/GENmemcpy.S b/arch/sparc/lib/GENmemcpy.S new file mode 100644 index 000000000..114340a0d --- /dev/null +++ b/arch/sparc/lib/GENmemcpy.S @@ -0,0 +1,142 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* GENmemcpy.S: Generic sparc64 memcpy. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ + +#ifdef __KERNEL__ +#include <linux/linkage.h> +#define GLOBAL_SPARE %g7 +#else +#define GLOBAL_SPARE %g5 +#endif + +#ifndef EX_LD +#define EX_LD(x,y) x +#endif + +#ifndef EX_ST +#define EX_ST(x,y) x +#endif + +#ifndef LOAD +#define LOAD(type,addr,dest) type [addr], dest +#endif + +#ifndef STORE +#define STORE(type,src,addr) type src, [addr] +#endif + +#ifndef FUNC_NAME +#define FUNC_NAME GENmemcpy +#endif + +#ifndef PREAMBLE +#define PREAMBLE +#endif + +#ifndef XCC +#define XCC xcc +#endif + + .register %g2,#scratch + .register %g3,#scratch + + .text + +#ifndef EX_RETVAL +#define EX_RETVAL(x) x +ENTRY(GEN_retl_o4_1) + add %o4, %o2, %o4 + retl + add %o4, 1, %o0 +ENDPROC(GEN_retl_o4_1) +ENTRY(GEN_retl_g1_8) + add %g1, %o2, %g1 + retl + add %g1, 8, %o0 +ENDPROC(GEN_retl_g1_8) +ENTRY(GEN_retl_o2_4) + retl + add %o2, 4, %o0 +ENDPROC(GEN_retl_o2_4) +ENTRY(GEN_retl_o2_1) + retl + add %o2, 1, %o0 +ENDPROC(GEN_retl_o2_1) +#endif + + .align 64 + + .globl FUNC_NAME + .type FUNC_NAME,#function +FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */ + srlx %o2, 31, %g2 + cmp %g2, 0 + tne %XCC, 5 + PREAMBLE + mov %o0, GLOBAL_SPARE + + cmp %o2, 0 + be,pn %XCC, 85f + or %o0, %o1, %o3 + cmp %o2, 16 + blu,a,pn %XCC, 80f + or %o3, %o2, %o3 + + xor %o0, %o1, %o4 + andcc %o4, 0x7, %g0 + bne,a,pn %XCC, 90f + sub %o0, %o1, %o3 + + and %o0, 0x7, %o4 + sub %o4, 0x8, %o4 + sub %g0, %o4, %o4 + sub %o2, %o4, %o2 +1: subcc %o4, 1, %o4 + EX_LD(LOAD(ldub, %o1, %g1),GEN_retl_o4_1) + EX_ST(STORE(stb, %g1, %o0),GEN_retl_o4_1) + add %o1, 1, %o1 + bne,pt %XCC, 1b + add %o0, 1, %o0 + + andn %o2, 0x7, %g1 + sub %o2, %g1, %o2 +1: subcc %g1, 0x8, %g1 + EX_LD(LOAD(ldx, %o1, %g2),GEN_retl_g1_8) + EX_ST(STORE(stx, %g2, %o0),GEN_retl_g1_8) + add %o1, 0x8, %o1 + bne,pt %XCC, 1b + add %o0, 0x8, %o0 + + brz,pt %o2, 85f + sub %o0, %o1, %o3 + ba,a,pt %XCC, 90f + + .align 64 +80: /* 0 < len <= 16 */ + andcc %o3, 0x3, %g0 + bne,pn %XCC, 90f + sub %o0, %o1, %o3 + +1: + subcc %o2, 4, %o2 + EX_LD(LOAD(lduw, %o1, %g1),GEN_retl_o2_4) + EX_ST(STORE(stw, %g1, %o1 + %o3),GEN_retl_o2_4) + bgu,pt %XCC, 1b + add %o1, 4, %o1 + +85: retl + mov EX_RETVAL(GLOBAL_SPARE), %o0 + + .align 32 +90: + subcc %o2, 1, %o2 + EX_LD(LOAD(ldub, %o1, %g1),GEN_retl_o2_1) + EX_ST(STORE(stb, %g1, %o1 + %o3),GEN_retl_o2_1) + bgu,pt %XCC, 90b + add %o1, 1, %o1 + retl + mov EX_RETVAL(GLOBAL_SPARE), %o0 + + .size FUNC_NAME, .-FUNC_NAME |