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Fix 256 byte assembly slowdown

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This commit is contained in:
Juliusz Sosinowicz
2019-06-12 00:52:42 +02:00
parent a48981c3c6
commit 911c8df185
1 changed files with 3 additions and 3 deletions
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6
wolfcrypt/src/port/arm/armv8-chacha.c
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@ -974,11 +974,10 @@ static WC_INLINE int wc_Chacha_encrypt_256(const word32 input[CHACHA_CHUNK_WORDS
// The paper NEON crypto by Daniel J. Bernstein and Peter Schwabe was used to optimize for ARM
// https://cryptojedi.org/papers/neoncrypto-20120320.pdf
".align 2 \n\t"
"LDR r14, %[input] \n\t" // load input address
"MOV r11, #1 \n\t"
"LDM r14, { r0-r12 } \n\t"
"STRD r10, r11, %[x_10] \n\t"
// r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12
// 0 1 2 3 4 5 6 7 8 9 10 11 12
"VMOV d0, r0, r1 \n\t"
@ -986,14 +985,15 @@ static WC_INLINE int wc_Chacha_encrypt_256(const word32 input[CHACHA_CHUNK_WORDS
"VMOV d2, r4, r5 \n\t"
"VMOV d3, r6, r7 \n\t"
"VMOV d4, r8, r9 \n\t"
"STRD r10, r11, %[x_10] \n\t"
"VMOV d5, r10, r11 \n\t"
"LDRD r11, r10, [r14, #4*14] \n\t"
"VMOV q4, q0 \n\t"
"VMOV q5, q1 \n\t"
"VMOV q6, q2 \n\t"
"VMOV q8, q0 \n\t"
"VMOV q9, q1 \n\t"
"VMOV q10, q2 \n\t"
"LDRD r11, r10, [r14, #4*14] \n\t"
// r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12
// 0 1 2 3 4 5 6 7 8 9 15 14 12
"VMOV d7, r11, r10 \n\t"