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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 // The paper NEON crypto by Daniel J. Bernstein and Peter Schwabe was used to optimize for ARM
// https://cryptojedi.org/papers/neoncrypto-20120320.pdf // https://cryptojedi.org/papers/neoncrypto-20120320.pdf
".align 2 \n\t"
"LDR r14, %[input] \n\t" // load input address "LDR r14, %[input] \n\t" // load input address
"MOV r11, #1 \n\t"
"LDM r14, { r0-r12 } \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 // 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 // 0 1 2 3 4 5 6 7 8 9 10 11 12
"VMOV d0, r0, r1 \n\t" "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 d2, r4, r5 \n\t"
"VMOV d3, r6, r7 \n\t" "VMOV d3, r6, r7 \n\t"
"VMOV d4, r8, r9 \n\t" "VMOV d4, r8, r9 \n\t"
"STRD r10, r11, %[x_10] \n\t"
"VMOV d5, r10, r11 \n\t" "VMOV d5, r10, r11 \n\t"
"LDRD r11, r10, [r14, #4*14] \n\t"
"VMOV q4, q0 \n\t" "VMOV q4, q0 \n\t"
"VMOV q5, q1 \n\t" "VMOV q5, q1 \n\t"
"VMOV q6, q2 \n\t" "VMOV q6, q2 \n\t"
"VMOV q8, q0 \n\t" "VMOV q8, q0 \n\t"
"VMOV q9, q1 \n\t" "VMOV q9, q1 \n\t"
"VMOV q10, q2 \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 // 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 // 0 1 2 3 4 5 6 7 8 9 15 14 12
"VMOV d7, r11, r10 \n\t" "VMOV d7, r11, r10 \n\t"