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Diffstat (limited to 'arch/sparc64/lib/checksum.S')
| -rw-r--r-- | arch/sparc64/lib/checksum.S | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/arch/sparc64/lib/checksum.S b/arch/sparc64/lib/checksum.S deleted file mode 100644 index 1d230f693dc..00000000000 --- a/arch/sparc64/lib/checksum.S +++ /dev/null @@ -1,173 +0,0 @@ -/* checksum.S: Sparc V9 optimized checksum code. - * - * Copyright(C) 1995 Linus Torvalds - * Copyright(C) 1995 Miguel de Icaza - * Copyright(C) 1996, 2000 David S. Miller - * Copyright(C) 1997 Jakub Jelinek - * - * derived from: - * Linux/Alpha checksum c-code - * Linux/ix86 inline checksum assembly - * RFC1071 Computing the Internet Checksum (esp. Jacobsons m68k code) - * David Mosberger-Tang for optimized reference c-code - * BSD4.4 portable checksum routine - */ - - .text - -csum_partial_fix_alignment: - /* We checked for zero length already, so there must be - * at least one byte. - */ - be,pt %icc, 1f - nop - ldub [%o0 + 0x00], %o4 - add %o0, 1, %o0 - sub %o1, 1, %o1 -1: andcc %o0, 0x2, %g0 - be,pn %icc, csum_partial_post_align - cmp %o1, 2 - blu,pn %icc, csum_partial_end_cruft - nop - lduh [%o0 + 0x00], %o5 - add %o0, 2, %o0 - sub %o1, 2, %o1 - ba,pt %xcc, csum_partial_post_align - add %o5, %o4, %o4 - - .align 32 - .globl csum_partial -csum_partial: /* %o0=buff, %o1=len, %o2=sum */ - prefetch [%o0 + 0x000], #n_reads - clr %o4 - prefetch [%o0 + 0x040], #n_reads - brz,pn %o1, csum_partial_finish - andcc %o0, 0x3, %g0 - - /* We "remember" whether the lowest bit in the address - * was set in %g7. Because if it is, we have to swap - * upper and lower 8 bit fields of the sum we calculate. - */ - bne,pn %icc, csum_partial_fix_alignment - andcc %o0, 0x1, %g7 - -csum_partial_post_align: - prefetch [%o0 + 0x080], #n_reads - andncc %o1, 0x3f, %o3 - - prefetch [%o0 + 0x0c0], #n_reads - sub %o1, %o3, %o1 - brz,pn %o3, 2f - prefetch [%o0 + 0x100], #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. - */ - prefetch [%o0 + 0x140], #n_reads -1: lduw [%o0 + 0x00], %o5 - lduw [%o0 + 0x04], %g1 - lduw [%o0 + 0x08], %g2 - add %o4, %o5, %o4 - lduw [%o0 + 0x0c], %g3 - add %o4, %g1, %o4 - lduw [%o0 + 0x10], %o5 - add %o4, %g2, %o4 - lduw [%o0 + 0x14], %g1 - add %o4, %g3, %o4 - lduw [%o0 + 0x18], %g2 - add %o4, %o5, %o4 - lduw [%o0 + 0x1c], %g3 - add %o4, %g1, %o4 - lduw [%o0 + 0x20], %o5 - add %o4, %g2, %o4 - lduw [%o0 + 0x24], %g1 - add %o4, %g3, %o4 - lduw [%o0 + 0x28], %g2 - add %o4, %o5, %o4 - lduw [%o0 + 0x2c], %g3 - add %o4, %g1, %o4 - lduw [%o0 + 0x30], %o5 - add %o4, %g2, %o4 - lduw [%o0 + 0x34], %g1 - add %o4, %g3, %o4 - lduw [%o0 + 0x38], %g2 - add %o4, %o5, %o4 - lduw [%o0 + 0x3c], %g3 - add %o4, %g1, %o4 - prefetch [%o0 + 0x180], #n_reads - add %o4, %g2, %o4 - subcc %o3, 0x40, %o3 - add %o0, 0x40, %o0 - bne,pt %icc, 1b - add %o4, %g3, %o4 - -2: and %o1, 0x3c, %o3 - brz,pn %o3, 2f - sub %o1, %o3, %o1 -1: lduw [%o0 + 0x00], %o5 - subcc %o3, 0x4, %o3 - add %o0, 0x4, %o0 - bne,pt %icc, 1b - add %o4, %o5, %o4 - -2: - /* fold 64-->32 */ - srlx %o4, 32, %o5 - srl %o4, 0, %o4 - add %o4, %o5, %o4 - srlx %o4, 32, %o5 - srl %o4, 0, %o4 - add %o4, %o5, %o4 - - /* fold 32-->16 */ - sethi %hi(0xffff0000), %g1 - srl %o4, 16, %o5 - andn %o4, %g1, %g2 - add %o5, %g2, %o4 - srl %o4, 16, %o5 - andn %o4, %g1, %g2 - add %o5, %g2, %o4 - -csum_partial_end_cruft: - /* %o4 has the 16-bit sum we have calculated so-far. */ - cmp %o1, 2 - blu,pt %icc, 1f - nop - lduh [%o0 + 0x00], %o5 - sub %o1, 2, %o1 - add %o0, 2, %o0 - add %o4, %o5, %o4 -1: brz,pt %o1, 1f - nop - ldub [%o0 + 0x00], %o5 - sub %o1, 1, %o1 - add %o0, 1, %o0 - sllx %o5, 8, %o5 - add %o4, %o5, %o4 -1: - /* fold 32-->16 */ - sethi %hi(0xffff0000), %g1 - srl %o4, 16, %o5 - andn %o4, %g1, %g2 - add %o5, %g2, %o4 - srl %o4, 16, %o5 - andn %o4, %g1, %g2 - add %o5, %g2, %o4 - -1: brz,pt %g7, 1f - nop - - /* We started with an odd byte, byte-swap the result. */ - srl %o4, 8, %o5 - and %o4, 0xff, %g1 - sll %g1, 8, %g1 - or %o5, %g1, %o4 - -1: addcc %o2, %o4, %o2 - addc %g0, %o2, %o2 - -csum_partial_finish: - retl - srl %o2, 0, %o0 |