#if defined(ED25519_GCC_64BIT_32BIT_CHOOSE) #define HAVE_GE25519_SCALARMULT_BASE_CHOOSE_NIELS DONNA_NOINLINE static void ge25519_scalarmult_base_choose_niels(ge25519_niels *t, const uint8_t table[256][96], uint32_t pos, signed char b) { int64_t breg = (int64_t)b; uint64_t sign = (uint64_t)breg >> 63; uint64_t mask = ~(sign - 1); uint64_t u = (breg + mask) ^ mask; __asm__ __volatile__ ( /* ysubx+xaddy+t2d */ "movq %0, %%rax ;\n" "movd %%rax, %%xmm14 ;\n" "pshufd $0x00, %%xmm14, %%xmm14 ;\n" "pxor %%xmm0, %%xmm0 ;\n" "pxor %%xmm1, %%xmm1 ;\n" "pxor %%xmm2, %%xmm2 ;\n" "pxor %%xmm3, %%xmm3 ;\n" "pxor %%xmm4, %%xmm4 ;\n" "pxor %%xmm5, %%xmm5 ;\n" /* 0 */ "movq $0, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movq $1, %%rax ;\n" "movd %%rax, %%xmm6 ;\n" "pxor %%xmm7, %%xmm7 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm6, %%xmm2 ;\n" "por %%xmm7, %%xmm3 ;\n" /* 1 */ "movq $1, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 0(%1), %%xmm6 ;\n" "movdqa 16(%1), %%xmm7 ;\n" "movdqa 32(%1), %%xmm8 ;\n" "movdqa 48(%1), %%xmm9 ;\n" "movdqa 64(%1), %%xmm10 ;\n" "movdqa 80(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* 2 */ "movq $2, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 96(%1), %%xmm6 ;\n" "movdqa 112(%1), %%xmm7 ;\n" "movdqa 128(%1), %%xmm8 ;\n" "movdqa 144(%1), %%xmm9 ;\n" "movdqa 160(%1), %%xmm10 ;\n" "movdqa 176(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* 3 */ "movq $3, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 192(%1), %%xmm6 ;\n" "movdqa 208(%1), %%xmm7 ;\n" "movdqa 224(%1), %%xmm8 ;\n" "movdqa 240(%1), %%xmm9 ;\n" "movdqa 256(%1), %%xmm10 ;\n" "movdqa 272(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* 4 */ "movq $4, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 288(%1), %%xmm6 ;\n" "movdqa 304(%1), %%xmm7 ;\n" "movdqa 320(%1), %%xmm8 ;\n" "movdqa 336(%1), %%xmm9 ;\n" "movdqa 352(%1), %%xmm10 ;\n" "movdqa 368(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* 5 */ "movq $5, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 384(%1), %%xmm6 ;\n" "movdqa 400(%1), %%xmm7 ;\n" "movdqa 416(%1), %%xmm8 ;\n" "movdqa 432(%1), %%xmm9 ;\n" "movdqa 448(%1), %%xmm10 ;\n" "movdqa 464(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* 6 */ "movq $6, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 480(%1), %%xmm6 ;\n" "movdqa 496(%1), %%xmm7 ;\n" "movdqa 512(%1), %%xmm8 ;\n" "movdqa 528(%1), %%xmm9 ;\n" "movdqa 544(%1), %%xmm10 ;\n" "movdqa 560(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* 7 */ "movq $7, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 576(%1), %%xmm6 ;\n" "movdqa 592(%1), %%xmm7 ;\n" "movdqa 608(%1), %%xmm8 ;\n" "movdqa 624(%1), %%xmm9 ;\n" "movdqa 640(%1), %%xmm10 ;\n" "movdqa 656(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* 8 */ "movq $8, %%rax ;\n" "movd %%rax, %%xmm15 ;\n" "pshufd $0x00, %%xmm15, %%xmm15 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa 672(%1), %%xmm6 ;\n" "movdqa 688(%1), %%xmm7 ;\n" "movdqa 704(%1), %%xmm8 ;\n" "movdqa 720(%1), %%xmm9 ;\n" "movdqa 736(%1), %%xmm10 ;\n" "movdqa 752(%1), %%xmm11 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pand %%xmm15, %%xmm8 ;\n" "pand %%xmm15, %%xmm9 ;\n" "pand %%xmm15, %%xmm10 ;\n" "pand %%xmm15, %%xmm11 ;\n" "por %%xmm6, %%xmm0 ;\n" "por %%xmm7, %%xmm1 ;\n" "por %%xmm8, %%xmm2 ;\n" "por %%xmm9, %%xmm3 ;\n" "por %%xmm10, %%xmm4 ;\n" "por %%xmm11, %%xmm5 ;\n" /* conditionally swap ysubx and xaddy */ "movq %3, %%rax ;\n" "xorq $1, %%rax ;\n" "movd %%rax, %%xmm14 ;\n" "pxor %%xmm15, %%xmm15 ;\n" "pshufd $0x00, %%xmm14, %%xmm14 ;\n" "pxor %%xmm0, %%xmm2 ;\n" "pxor %%xmm1, %%xmm3 ;\n" "pcmpeqd %%xmm14, %%xmm15 ;\n" "movdqa %%xmm2, %%xmm6 ;\n" "movdqa %%xmm3, %%xmm7 ;\n" "pand %%xmm15, %%xmm6 ;\n" "pand %%xmm15, %%xmm7 ;\n" "pxor %%xmm6, %%xmm0 ;\n" "pxor %%xmm7, %%xmm1 ;\n" "pxor %%xmm0, %%xmm2 ;\n" "pxor %%xmm1, %%xmm3 ;\n" /* store ysubx */ "xorq %%rax, %%rax ;\n" "movd %%xmm0, %%rcx ;\n" "movd %%xmm0, %%r8 ;\n" "movd %%xmm1, %%rsi ;\n" "pshufd $0xee, %%xmm0, %%xmm0 ;\n" "pshufd $0xee, %%xmm1, %%xmm1 ;\n" "movd %%xmm0, %%rdx ;\n" "movd %%xmm1, %%rdi ;\n" "shrdq $51, %%rdx, %%r8 ;\n" "shrdq $38, %%rsi, %%rdx ;\n" "shrdq $25, %%rdi, %%rsi ;\n" "shrq $12, %%rdi ;\n" "movq %%rcx, %%r9 ;\n" "movq %%r8, %%r10 ;\n" "movq %%rdx, %%r11 ;\n" "movq %%rsi, %%r12 ;\n" "movq %%rdi, %%r13 ;\n" "shrq $26, %%r9 ;\n" "shrq $26, %%r10 ;\n" "shrq $26, %%r11 ;\n" "shrq $26, %%r12 ;\n" "shrq $26, %%r13 ;\n" "andl $0x3ffffff, %%ecx ;\n" "andl $0x1ffffff, %%r9d ;\n" "andl $0x3ffffff, %%r8d ;\n" "andl $0x1ffffff, %%r10d ;\n" "andl $0x3ffffff, %%edx ;\n" "andl $0x1ffffff, %%r11d ;\n" "andl $0x3ffffff, %%esi ;\n" "andl $0x1ffffff, %%r12d ;\n" "andl $0x3ffffff, %%edi ;\n" "andl $0x1ffffff, %%r13d ;\n" "movl %%ecx, 0(%2) ;\n" "movl %%r9d, 4(%2) ;\n" "movl %%r8d, 8(%2) ;\n" "movl %%r10d, 12(%2) ;\n" "movl %%edx, 16(%2) ;\n" "movl %%r11d, 20(%2) ;\n" "movl %%esi, 24(%2) ;\n" "movl %%r12d, 28(%2) ;\n" "movl %%edi, 32(%2) ;\n" "movl %%r13d, 36(%2) ;\n" /* store xaddy */ "movd %%xmm2, %%rcx ;\n" "movd %%xmm2, %%r8 ;\n" "movd %%xmm3, %%rsi ;\n" "pshufd $0xee, %%xmm2, %%xmm2 ;\n" "pshufd $0xee, %%xmm3, %%xmm3 ;\n" "movd %%xmm2, %%rdx ;\n" "movd %%xmm3, %%rdi ;\n" "shrdq $51, %%rdx, %%r8 ;\n" "shrdq $38, %%rsi, %%rdx ;\n" "shrdq $25, %%rdi, %%rsi ;\n" "shrq $12, %%rdi ;\n" "movq %%rcx, %%r9 ;\n" "movq %%r8, %%r10 ;\n" "movq %%rdx, %%r11 ;\n" "movq %%rsi, %%r12 ;\n" "movq %%rdi, %%r13 ;\n" "shrq $26, %%r9 ;\n" "shrq $26, %%r10 ;\n" "shrq $26, %%r11 ;\n" "shrq $26, %%r12 ;\n" "shrq $26, %%r13 ;\n" "andl $0x3ffffff, %%ecx ;\n" "andl $0x1ffffff, %%r9d ;\n" "andl $0x3ffffff, %%r8d ;\n" "andl $0x1ffffff, %%r10d ;\n" "andl $0x3ffffff, %%edx ;\n" "andl $0x1ffffff, %%r11d ;\n" "andl $0x3ffffff, %%esi ;\n" "andl $0x1ffffff, %%r12d ;\n" "andl $0x3ffffff, %%edi ;\n" "andl $0x1ffffff, %%r13d ;\n" "movl %%ecx, 40(%2) ;\n" "movl %%r9d, 44(%2) ;\n" "movl %%r8d, 48(%2) ;\n" "movl %%r10d, 52(%2) ;\n" "movl %%edx, 56(%2) ;\n" "movl %%r11d, 60(%2) ;\n" "movl %%esi, 64(%2) ;\n" "movl %%r12d, 68(%2) ;\n" "movl %%edi, 72(%2) ;\n" "movl %%r13d, 76(%2) ;\n" /* extract t2d */ "xorq %%rax, %%rax ;\n" "movd %%xmm4, %%rcx ;\n" "movd %%xmm4, %%r8 ;\n" "movd %%xmm5, %%rsi ;\n" "pshufd $0xee, %%xmm4, %%xmm4 ;\n" "pshufd $0xee, %%xmm5, %%xmm5 ;\n" "movd %%xmm4, %%rdx ;\n" "movd %%xmm5, %%rdi ;\n" "shrdq $51, %%rdx, %%r8 ;\n" "shrdq $38, %%rsi, %%rdx ;\n" "shrdq $25, %%rdi, %%rsi ;\n" "shrq $12, %%rdi ;\n" "movq %%rcx, %%r9 ;\n" "movq %%r8, %%r10 ;\n" "movq %%rdx, %%r11 ;\n" "movq %%rsi, %%r12 ;\n" "movq %%rdi, %%r13 ;\n" "shrq $26, %%r9 ;\n" "shrq $26, %%r10 ;\n" "shrq $26, %%r11 ;\n" "shrq $26, %%r12 ;\n" "shrq $26, %%r13 ;\n" "andl $0x3ffffff, %%ecx ;\n" "andl $0x1ffffff, %%r9d ;\n" "andl $0x3ffffff, %%r8d ;\n" "andl $0x1ffffff, %%r10d ;\n" "andl $0x3ffffff, %%edx ;\n" "andl $0x1ffffff, %%r11d ;\n" "andl $0x3ffffff, %%esi ;\n" "andl $0x1ffffff, %%r12d ;\n" "andl $0x3ffffff, %%edi ;\n" "andl $0x1ffffff, %%r13d ;\n" "movd %%ecx, %%xmm0 ;\n" "movd %%r9d, %%xmm4 ;\n" "movd %%r8d, %%xmm8 ;\n" "movd %%r10d, %%xmm3 ;\n" "movd %%edx, %%xmm1 ;\n" "movd %%r11d, %%xmm5 ;\n" "movd %%esi, %%xmm6 ;\n" "movd %%r12d, %%xmm7 ;\n" "movd %%edi, %%xmm2 ;\n" "movd %%r13d, %%xmm9 ;\n" "punpckldq %%xmm4, %%xmm0 ;\n" "punpckldq %%xmm3, %%xmm8 ;\n" "punpckldq %%xmm5, %%xmm1 ;\n" "punpckldq %%xmm7, %%xmm6 ;\n" "punpckldq %%xmm9, %%xmm2 ;\n" "punpcklqdq %%xmm8, %%xmm0 ;\n" "punpcklqdq %%xmm6, %%xmm1 ;\n" /* set up 2p in to 3/4 */ "movl $0x7ffffda, %%ecx ;\n" "movl $0x3fffffe, %%edx ;\n" "movl $0x7fffffe, %%eax ;\n" "movd %%ecx, %%xmm3 ;\n" "movd %%edx, %%xmm5 ;\n" "movd %%eax, %%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 t2d */ "movdqa %%xmm0, 80(%2) ;\n" "movdqa %%xmm1, 96(%2) ;\n" "movd %%xmm2, %%rax ;\n" "movq %%rax, 112(%2) ;\n" : : "m"(u), "r"(&table[pos * 8]), "r"(t), "m"(sign) /* %0 = u, %1 = table, %2 = t, %3 = sign */ : "%rax", "%rcx", "%rdx", "%rdi", "%rsi", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm14", "%xmm14", "cc", "memory" ); } #endif /* defined(ED25519_GCC_64BIT_32BIT_CHOOSE) */