Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
lib/crypto: arm/blake2s: Fix some comments
Fix the indices in some comments in blake2s-core.S.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20251102021553.176587-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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lib/crypto/arm/blake2s-core.S
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lib/crypto/arm/blake2s-core.S
···
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// Execute one round of BLAKE2s by updating the state matrix v[0..15]. v[0..9]
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// are in r0..r9. The stack pointer points to 8 bytes of scratch space for
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// spilling v[8..9], then to v[9..15], then to the message block. r10-r12 and
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// spilling v[8..9], then to v[10..15], then to the message block. r10-r12 and
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// r14 are free to use. The macro arguments s0-s15 give the order in which the
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// message words are used in this round.
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//
···
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.Lcopy_block_done:
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str r1, [sp, #68] // Update message pointer
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// Calculate v[8..15]. Push v[9..15] onto the stack, and leave space
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// Calculate v[8..15]. Push v[10..15] onto the stack, and leave space
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// for spilling v[8..9]. Leave v[8..9] in r8-r9.
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mov r14, r0 // r14 = ctx
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adr r12, .Lblake2s_IV
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ldmia r12!, {r8-r9} // load IV[0..1]
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__ldrd r0, r1, r14, 40 // load f[0..1]
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ldm r12, {r2-r7} // load IV[3..7]
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ldm r12, {r2-r7} // load IV[2..7]
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eor r4, r4, r10 // v[12] = IV[4] ^ t[0]
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eor r5, r5, r11 // v[13] = IV[5] ^ t[1]
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eor r6, r6, r0 // v[14] = IV[6] ^ f[0]
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eor r7, r7, r1 // v[15] = IV[7] ^ f[1]
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push {r2-r7} // push v[9..15]
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push {r2-r7} // push v[10..15]
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sub sp, sp, #8 // leave space for v[8..9]
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// Load h[0..7] == v[0..7].