mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-19 12:58:13 +00:00
514 lines
18 KiB
C
514 lines
18 KiB
C
#if defined(ED25519_GCC_32BIT_SSE_CHOOSE)
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#define HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS
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DONNA_NOINLINE static void
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ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) {
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int32_t breg = (int32_t)b;
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uint32_t sign = (uint32_t)breg >> 31;
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uint32_t mask = ~(sign - 1);
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uint32_t u = (breg + mask) ^ mask;
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__asm__ __volatile__ (
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/* ysubx+xaddy */
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"movl %0, %%eax ;\n"
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"movd %%eax, %%xmm6 ;\n"
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"pshufd $0x00, %%xmm6, %%xmm6 ;\n"
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"pxor %%xmm0, %%xmm0 ;\n"
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"pxor %%xmm1, %%xmm1 ;\n"
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"pxor %%xmm2, %%xmm2 ;\n"
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"pxor %%xmm3, %%xmm3 ;\n"
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/* 0 */
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"movl $0, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movl $1, %%ecx ;\n"
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"movd %%ecx, %%xmm4 ;\n"
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"pxor %%xmm5, %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 1 */
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"movl $1, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 0(%1), %%xmm4 ;\n"
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"movdqa 16(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 32(%1), %%xmm4 ;\n"
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"movdqa 48(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 2 */
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"movl $2, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 96(%1), %%xmm4 ;\n"
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"movdqa 112(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 128(%1), %%xmm4 ;\n"
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"movdqa 144(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 3 */
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"movl $3, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 192(%1), %%xmm4 ;\n"
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"movdqa 208(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 224(%1), %%xmm4 ;\n"
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"movdqa 240(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 4 */
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"movl $4, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 288(%1), %%xmm4 ;\n"
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"movdqa 304(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 320(%1), %%xmm4 ;\n"
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"movdqa 336(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 5 */
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"movl $5, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 384(%1), %%xmm4 ;\n"
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"movdqa 400(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 416(%1), %%xmm4 ;\n"
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"movdqa 432(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 6 */
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"movl $6, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 480(%1), %%xmm4 ;\n"
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"movdqa 496(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 512(%1), %%xmm4 ;\n"
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"movdqa 528(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 7 */
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"movl $7, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 576(%1), %%xmm4 ;\n"
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"movdqa 592(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 608(%1), %%xmm4 ;\n"
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"movdqa 624(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* 8 */
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"movl $8, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 672(%1), %%xmm4 ;\n"
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"movdqa 688(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm0 ;\n"
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"por %%xmm5, %%xmm1 ;\n"
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"movdqa 704(%1), %%xmm4 ;\n"
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"movdqa 720(%1), %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"por %%xmm4, %%xmm2 ;\n"
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"por %%xmm5, %%xmm3 ;\n"
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/* conditional swap based on sign */
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"movl %3, %%ecx ;\n"
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"movl %2, %%eax ;\n"
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"xorl $1, %%ecx ;\n"
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"movd %%ecx, %%xmm6 ;\n"
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"pxor %%xmm7, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm6, %%xmm6 ;\n"
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"pxor %%xmm0, %%xmm2 ;\n"
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"pxor %%xmm1, %%xmm3 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa %%xmm2, %%xmm4 ;\n"
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"movdqa %%xmm3, %%xmm5 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"pand %%xmm7, %%xmm5 ;\n"
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"pxor %%xmm4, %%xmm0 ;\n"
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"pxor %%xmm5, %%xmm1 ;\n"
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"pxor %%xmm0, %%xmm2 ;\n"
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"pxor %%xmm1, %%xmm3 ;\n"
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/* store ysubx */
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"movd %%xmm0, %%ecx ;\n"
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"movl %%ecx, %%edx ;\n"
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"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 0(%%eax) ;\n"
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"movd %%xmm0, %%ecx ;\n"
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"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
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"shrdl $26, %%ecx, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 4(%%eax) ;\n"
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"movd %%xmm0, %%edx ;\n"
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"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
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"shrdl $19, %%edx, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 8(%%eax) ;\n"
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"movd %%xmm0, %%ecx ;\n"
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"shrdl $13, %%ecx, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 12(%%eax) ;\n"
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"movd %%xmm1, %%edx ;\n"
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"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
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"shrl $6, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 16(%%eax) ;\n"
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"movl %%edx, %%ecx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 20(%%eax) ;\n"
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"movd %%xmm1, %%edx ;\n"
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"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
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"shrdl $25, %%edx, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 24(%%eax) ;\n"
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"movd %%xmm1, %%ecx ;\n"
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"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
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"shrdl $19, %%ecx, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 28(%%eax) ;\n"
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"movd %%xmm1, %%edx ;\n"
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"shrdl $12, %%edx, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 32(%%eax) ;\n"
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"shrl $6, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"xorl %%ecx, %%ecx ;\n"
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"movl %%edx, 36(%%eax) ;\n"
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"movl %%ecx, 40(%%eax) ;\n"
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"movl %%ecx, 44(%%eax) ;\n"
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/* store xaddy */
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"addl $48, %%eax ;\n"
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"movdqa %%xmm2, %%xmm0 ;\n"
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"movdqa %%xmm3, %%xmm1 ;\n"
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"movd %%xmm0, %%ecx ;\n"
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"movl %%ecx, %%edx ;\n"
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"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 0(%%eax) ;\n"
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"movd %%xmm0, %%ecx ;\n"
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"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
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"shrdl $26, %%ecx, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 4(%%eax) ;\n"
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"movd %%xmm0, %%edx ;\n"
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"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
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"shrdl $19, %%edx, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 8(%%eax) ;\n"
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"movd %%xmm0, %%ecx ;\n"
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"shrdl $13, %%ecx, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 12(%%eax) ;\n"
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"movd %%xmm1, %%edx ;\n"
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"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
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"shrl $6, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 16(%%eax) ;\n"
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"movl %%edx, %%ecx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 20(%%eax) ;\n"
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"movd %%xmm1, %%edx ;\n"
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"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
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"shrdl $25, %%edx, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 24(%%eax) ;\n"
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"movd %%xmm1, %%ecx ;\n"
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"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
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"shrdl $19, %%ecx, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"movl %%edx, 28(%%eax) ;\n"
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"movd %%xmm1, %%edx ;\n"
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"shrdl $12, %%edx, %%ecx ;\n"
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"andl $0x3ffffff, %%ecx ;\n"
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"movl %%ecx, 32(%%eax) ;\n"
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"shrl $6, %%edx ;\n"
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"andl $0x1ffffff, %%edx ;\n"
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"xorl %%ecx, %%ecx ;\n"
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"movl %%edx, 36(%%eax) ;\n"
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"movl %%ecx, 40(%%eax) ;\n"
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"movl %%ecx, 44(%%eax) ;\n"
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/* t2d */
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"movl %0, %%eax ;\n"
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"movd %%eax, %%xmm6 ;\n"
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"pshufd $0x00, %%xmm6, %%xmm6 ;\n"
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"pxor %%xmm0, %%xmm0 ;\n"
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"pxor %%xmm1, %%xmm1 ;\n"
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/* 0 */
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"movl $0, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"pxor %%xmm0, %%xmm0 ;\n"
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"pxor %%xmm1, %%xmm1 ;\n"
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/* 1 */
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"movl $1, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 64(%1), %%xmm3 ;\n"
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"movdqa 80(%1), %%xmm4 ;\n"
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"pand %%xmm7, %%xmm3 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"por %%xmm3, %%xmm0 ;\n"
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"por %%xmm4, %%xmm1 ;\n"
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/* 2 */
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"movl $2, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 160(%1), %%xmm3 ;\n"
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"movdqa 176(%1), %%xmm4 ;\n"
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"pand %%xmm7, %%xmm3 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"por %%xmm3, %%xmm0 ;\n"
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"por %%xmm4, %%xmm1 ;\n"
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/* 3 */
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"movl $3, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 256(%1), %%xmm3 ;\n"
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"movdqa 272(%1), %%xmm4 ;\n"
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"pand %%xmm7, %%xmm3 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"por %%xmm3, %%xmm0 ;\n"
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"por %%xmm4, %%xmm1 ;\n"
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/* 4 */
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"movl $4, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 352(%1), %%xmm3 ;\n"
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"movdqa 368(%1), %%xmm4 ;\n"
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"pand %%xmm7, %%xmm3 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"por %%xmm3, %%xmm0 ;\n"
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"por %%xmm4, %%xmm1 ;\n"
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/* 5 */
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"movl $5, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
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"movdqa 448(%1), %%xmm3 ;\n"
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"movdqa 464(%1), %%xmm4 ;\n"
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"pand %%xmm7, %%xmm3 ;\n"
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"pand %%xmm7, %%xmm4 ;\n"
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"por %%xmm3, %%xmm0 ;\n"
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"por %%xmm4, %%xmm1 ;\n"
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/* 6 */
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"movl $6, %%eax ;\n"
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"movd %%eax, %%xmm7 ;\n"
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"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
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"pcmpeqd %%xmm6, %%xmm7 ;\n"
|
|
"movdqa 544(%1), %%xmm3 ;\n"
|
|
"movdqa 560(%1), %%xmm4 ;\n"
|
|
"pand %%xmm7, %%xmm3 ;\n"
|
|
"pand %%xmm7, %%xmm4 ;\n"
|
|
"por %%xmm3, %%xmm0 ;\n"
|
|
"por %%xmm4, %%xmm1 ;\n"
|
|
|
|
/* 7 */
|
|
"movl $7, %%eax ;\n"
|
|
"movd %%eax, %%xmm7 ;\n"
|
|
"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
|
|
"pcmpeqd %%xmm6, %%xmm7 ;\n"
|
|
"movdqa 640(%1), %%xmm3 ;\n"
|
|
"movdqa 656(%1), %%xmm4 ;\n"
|
|
"pand %%xmm7, %%xmm3 ;\n"
|
|
"pand %%xmm7, %%xmm4 ;\n"
|
|
"por %%xmm3, %%xmm0 ;\n"
|
|
"por %%xmm4, %%xmm1 ;\n"
|
|
|
|
/* 8 */
|
|
"movl $8, %%eax ;\n"
|
|
"movd %%eax, %%xmm7 ;\n"
|
|
"pshufd $0x00, %%xmm7, %%xmm7 ;\n"
|
|
"pcmpeqd %%xmm6, %%xmm7 ;\n"
|
|
"movdqa 736(%1), %%xmm3 ;\n"
|
|
"movdqa 752(%1), %%xmm4 ;\n"
|
|
"pand %%xmm7, %%xmm3 ;\n"
|
|
"pand %%xmm7, %%xmm4 ;\n"
|
|
"por %%xmm3, %%xmm0 ;\n"
|
|
"por %%xmm4, %%xmm1 ;\n"
|
|
|
|
/* store t2d */
|
|
"movl %2, %%eax ;\n"
|
|
"addl $96, %%eax ;\n"
|
|
"movd %%xmm0, %%ecx ;\n"
|
|
"movl %%ecx, %%edx ;\n"
|
|
"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
|
|
"andl $0x3ffffff, %%ecx ;\n"
|
|
"movl %%ecx, 0(%%eax) ;\n"
|
|
"movd %%xmm0, %%ecx ;\n"
|
|
"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
|
|
"shrdl $26, %%ecx, %%edx ;\n"
|
|
"andl $0x1ffffff, %%edx ;\n"
|
|
"movl %%edx, 4(%%eax) ;\n"
|
|
"movd %%xmm0, %%edx ;\n"
|
|
"pshufd $0x39, %%xmm0, %%xmm0 ;\n"
|
|
"shrdl $19, %%edx, %%ecx ;\n"
|
|
"andl $0x3ffffff, %%ecx ;\n"
|
|
"movl %%ecx, 8(%%eax) ;\n"
|
|
"movd %%xmm0, %%ecx ;\n"
|
|
"shrdl $13, %%ecx, %%edx ;\n"
|
|
"andl $0x1ffffff, %%edx ;\n"
|
|
"movl %%edx, 12(%%eax) ;\n"
|
|
"movd %%xmm1, %%edx ;\n"
|
|
"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
|
|
"shrl $6, %%ecx ;\n"
|
|
"andl $0x3ffffff, %%ecx ;\n"
|
|
"movl %%ecx, 16(%%eax) ;\n"
|
|
"movl %%edx, %%ecx ;\n"
|
|
"andl $0x1ffffff, %%edx ;\n"
|
|
"movl %%edx, 20(%%eax) ;\n"
|
|
"movd %%xmm1, %%edx ;\n"
|
|
"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
|
|
"shrdl $25, %%edx, %%ecx ;\n"
|
|
"andl $0x3ffffff, %%ecx ;\n"
|
|
"movl %%ecx, 24(%%eax) ;\n"
|
|
"movd %%xmm1, %%ecx ;\n"
|
|
"pshufd $0x39, %%xmm1, %%xmm1 ;\n"
|
|
"shrdl $19, %%ecx, %%edx ;\n"
|
|
"andl $0x1ffffff, %%edx ;\n"
|
|
"movl %%edx, 28(%%eax) ;\n"
|
|
"movd %%xmm1, %%edx ;\n"
|
|
"movd %%xmm1, %%edx ;\n"
|
|
"shrdl $12, %%edx, %%ecx ;\n"
|
|
"andl $0x3ffffff, %%ecx ;\n"
|
|
"movl %%ecx, 32(%%eax) ;\n"
|
|
"shrl $6, %%edx ;\n"
|
|
"andl $0x1ffffff, %%edx ;\n"
|
|
"xorl %%ecx, %%ecx ;\n"
|
|
"movl %%edx, 36(%%eax) ;\n"
|
|
"movl %%ecx, 40(%%eax) ;\n"
|
|
"movl %%ecx, 44(%%eax) ;\n"
|
|
"movdqa 0(%%eax), %%xmm0 ;\n"
|
|
"movdqa 16(%%eax), %%xmm1 ;\n"
|
|
"movdqa 32(%%eax), %%xmm2 ;\n"
|
|
|
|
/* conditionally negate t2d */
|
|
|
|
/* set up 2p in to 3/4 */
|
|
"movl $0x7ffffda, %%ecx ;\n"
|
|
"movl $0x3fffffe, %%edx ;\n"
|
|
"movd %%ecx, %%xmm3 ;\n"
|
|
"movd %%edx, %%xmm5 ;\n"
|
|
"movl $0x7fffffe, %%ecx ;\n"
|
|
"movd %%ecx, %%xmm4 ;\n"
|
|
"punpckldq %%xmm5, %%xmm3 ;\n"
|
|
"punpckldq %%xmm5, %%xmm4 ;\n"
|
|
"punpcklqdq %%xmm4, %%xmm3 ;\n"
|
|
"movdqa %%xmm4, %%xmm5 ;\n"
|
|
"punpcklqdq %%xmm4, %%xmm4 ;\n"
|
|
|
|
/* subtract and conditionally move */
|
|
"movl %3, %%ecx ;\n"
|
|
"sub $1, %%ecx ;\n"
|
|
"movd %%ecx, %%xmm6 ;\n"
|
|
"pshufd $0x00, %%xmm6, %%xmm6 ;\n"
|
|
"movdqa %%xmm6, %%xmm7 ;\n"
|
|
"psubd %%xmm0, %%xmm3 ;\n"
|
|
"psubd %%xmm1, %%xmm4 ;\n"
|
|
"psubd %%xmm2, %%xmm5 ;\n"
|
|
"pand %%xmm6, %%xmm0 ;\n"
|
|
"pand %%xmm6, %%xmm1 ;\n"
|
|
"pand %%xmm6, %%xmm2 ;\n"
|
|
"pandn %%xmm3, %%xmm6 ;\n"
|
|
"movdqa %%xmm7, %%xmm3 ;\n"
|
|
"pandn %%xmm4, %%xmm7 ;\n"
|
|
"pandn %%xmm5, %%xmm3 ;\n"
|
|
"por %%xmm6, %%xmm0 ;\n"
|
|
"por %%xmm7, %%xmm1 ;\n"
|
|
"por %%xmm3, %%xmm2 ;\n"
|
|
|
|
/* store */
|
|
"movdqa %%xmm0, 0(%%eax) ;\n"
|
|
"movdqa %%xmm1, 16(%%eax) ;\n"
|
|
"movdqa %%xmm2, 32(%%eax) ;\n"
|
|
:
|
|
: "m"(u), "r"(&table[pos * 8]), "m"(t), "m"(sign) /* %0 = u, %1 = table, %2 = t, %3 = sign */
|
|
: "%eax", "%ecx", "%edx", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "cc", "memory"
|
|
);
|
|
}
|
|
|
|
#endif /* defined(ED25519_GCC_32BIT_SSE_CHOOSE) */
|
|
|