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Code Issues Releases Wiki Activity

Hopefully remove the remaining %ecx clobbering cases in chacha_386

This commit is contained in:
Frank Denis 2018-05-01 11:50:01 +02:00
parent 8509cc1bd7
commit 084bfe67fd
1 changed files with 7 additions and 4 deletions
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11
vendor/github.com/aead/chacha20/chacha/chacha_386.s generated vendored
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@ -41,7 +41,8 @@ TEXT ·supportsSSSE3(SB), NOSPLIT, $0-1
CPUID
SHRL $9, CX
ANDL $1, CX
MOVB CX, ret+0(FP)
MOVB CX, DX
MOVB DX, ret+0(FP)
RET
#define Dst DI
@ -163,18 +164,19 @@ CHACHA_LOOP:
JMP GENERATE_KEYSTREAM // There is at least one more plaintext byte
BUFFER_KEYSTREAM:
MOVL Len, Rounds // Use Rounds as tmp. register for Len - we don't need Rounds anymore
MOVL block+24(FP), State
MOVOU X4, 0(State)
MOVOU X5, 16(State)
MOVOU X6, 32(State)
MOVOU X7, 48(State)
MOVL Len, Rounds // Use Rounds as tmp. register for Len - we don't need Rounds anymore
FINALIZE(Dst, Src, State, Rounds, Tmp0, Tmp1)
DONE:
MOVL Len, Tmp0 // Number of bytes written to the keystream buffer - 0 iff Len mod 64 == 0
MOVL Tmp0, ret+36(FP)
MOVL state+28(FP), State
MOVOU X3, 3*16(State)
MOVL Len, ret+36(FP) // Number of bytes written to the keystream buffer - 0 iff Len mod 64 == 0
RET
#undef State
@ -267,10 +269,11 @@ BUFFER_KEYSTREAM:
MOVL Stack, Tmp2 // set BP to SP so that DONE resets SP correctly
DONE:
MOVL Len, Tmp0
MOVL Tmp0, ret+36(FP)
MOVL Tmp2, Stack // restore stack pointer
MOVL state+28(FP), Tmp0
MOVOU X3, 3*16(Tmp0)
MOVL Len, ret+36(FP)
RET
#undef Dst