/ This Source Code Form is subject to the terms of the Mozilla Public / License, v. 2.0. If a copy of the MPL was not distributed with this / file, You can obtain one at http://mozilla.org/MPL/2.0/. / ------------------------------------------------------------------------ / / Implementation of s_mpv_mul_set_vec which exploits / the 64X64->128 bit unsigned multiply instruction. / / ------------------------------------------------------------------------ / r = a * digit, r and a are vectors of length len / returns the carry digit / r and a are 64 bit aligned. / / uint64_t / s_mpv_mul_set_vec64(uint64_t *r, uint64_t *a, int len, uint64_t digit) / .text; .align 16; .globl s_mpv_mul_set_vec64; .type s_mpv_mul_set_vec64, @function; s_mpv_mul_set_vec64: xorq %rax, %rax / if (len == 0) return (0) testq %rdx, %rdx jz .L17 movq %rdx, %r8 / Use r8 for len; %rdx is used by mul xorq %r9, %r9 / cy = 0 .L15: cmpq $8, %r8 / 8 - len jb .L16 movq 0(%rsi), %rax / rax = a[0] movq 8(%rsi), %r11 / prefetch a[1] mulq %rcx / p = a[0] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 0(%rdi) / r[0] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 16(%rsi), %r11 / prefetch a[2] mulq %rcx / p = a[1] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 8(%rdi) / r[1] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 24(%rsi), %r11 / prefetch a[3] mulq %rcx / p = a[2] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 16(%rdi) / r[2] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 32(%rsi), %r11 / prefetch a[4] mulq %rcx / p = a[3] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 24(%rdi) / r[3] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 40(%rsi), %r11 / prefetch a[5] mulq %rcx / p = a[4] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 32(%rdi) / r[4] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 48(%rsi), %r11 / prefetch a[6] mulq %rcx / p = a[5] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 40(%rdi) / r[5] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 56(%rsi), %r11 / prefetch a[7] mulq %rcx / p = a[6] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 48(%rdi) / r[6] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax mulq %rcx / p = a[7] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 56(%rdi) / r[7] = lo(p) movq %rdx, %r9 / cy = hi(p) addq $64, %rsi addq $64, %rdi subq $8, %r8 jz .L17 jmp .L15 .L16: movq 0(%rsi), %rax mulq %rcx / p = a[0] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 0(%rdi) / r[0] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L17 movq 8(%rsi), %rax mulq %rcx / p = a[1] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 8(%rdi) / r[1] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L17 movq 16(%rsi), %rax mulq %rcx / p = a[2] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 16(%rdi) / r[2] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L17 movq 24(%rsi), %rax mulq %rcx / p = a[3] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 24(%rdi) / r[3] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L17 movq 32(%rsi), %rax mulq %rcx / p = a[4] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 32(%rdi) / r[4] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L17 movq 40(%rsi), %rax mulq %rcx / p = a[5] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 40(%rdi) / r[5] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L17 movq 48(%rsi), %rax mulq %rcx / p = a[6] * digit addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 48(%rdi) / r[6] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L17 .L17: movq %r9, %rax ret .size s_mpv_mul_set_vec64, .-s_mpv_mul_set_vec64 / ------------------------------------------------------------------------ / / Implementation of s_mpv_mul_add_vec which exploits / the 64X64->128 bit unsigned multiply instruction. / / ------------------------------------------------------------------------ / r += a * digit, r and a are vectors of length len / returns the carry digit / r and a are 64 bit aligned. / / uint64_t / s_mpv_mul_add_vec64(uint64_t *r, uint64_t *a, int len, uint64_t digit) / .text; .align 16; .globl s_mpv_mul_add_vec64; .type s_mpv_mul_add_vec64, @function; s_mpv_mul_add_vec64: xorq %rax, %rax / if (len == 0) return (0) testq %rdx, %rdx jz .L27 movq %rdx, %r8 / Use r8 for len; %rdx is used by mul xorq %r9, %r9 / cy = 0 .L25: cmpq $8, %r8 / 8 - len jb .L26 movq 0(%rsi), %rax / rax = a[0] movq 0(%rdi), %r10 / r10 = r[0] movq 8(%rsi), %r11 / prefetch a[1] mulq %rcx / p = a[0] * digit addq %r10, %rax adcq $0, %rdx / p += r[0] movq 8(%rdi), %r10 / prefetch r[1] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 0(%rdi) / r[0] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 16(%rsi), %r11 / prefetch a[2] mulq %rcx / p = a[1] * digit addq %r10, %rax adcq $0, %rdx / p += r[1] movq 16(%rdi), %r10 / prefetch r[2] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 8(%rdi) / r[1] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 24(%rsi), %r11 / prefetch a[3] mulq %rcx / p = a[2] * digit addq %r10, %rax adcq $0, %rdx / p += r[2] movq 24(%rdi), %r10 / prefetch r[3] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 16(%rdi) / r[2] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 32(%rsi), %r11 / prefetch a[4] mulq %rcx / p = a[3] * digit addq %r10, %rax adcq $0, %rdx / p += r[3] movq 32(%rdi), %r10 / prefetch r[4] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 24(%rdi) / r[3] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 40(%rsi), %r11 / prefetch a[5] mulq %rcx / p = a[4] * digit addq %r10, %rax adcq $0, %rdx / p += r[4] movq 40(%rdi), %r10 / prefetch r[5] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 32(%rdi) / r[4] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 48(%rsi), %r11 / prefetch a[6] mulq %rcx / p = a[5] * digit addq %r10, %rax adcq $0, %rdx / p += r[5] movq 48(%rdi), %r10 / prefetch r[6] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 40(%rdi) / r[5] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax movq 56(%rsi), %r11 / prefetch a[7] mulq %rcx / p = a[6] * digit addq %r10, %rax adcq $0, %rdx / p += r[6] movq 56(%rdi), %r10 / prefetch r[7] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 48(%rdi) / r[6] = lo(p) movq %rdx, %r9 / cy = hi(p) movq %r11, %rax mulq %rcx / p = a[7] * digit addq %r10, %rax adcq $0, %rdx / p += r[7] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 56(%rdi) / r[7] = lo(p) movq %rdx, %r9 / cy = hi(p) addq $64, %rsi addq $64, %rdi subq $8, %r8 jz .L27 jmp .L25 .L26: movq 0(%rsi), %rax movq 0(%rdi), %r10 mulq %rcx / p = a[0] * digit addq %r10, %rax adcq $0, %rdx / p += r[0] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 0(%rdi) / r[0] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L27 movq 8(%rsi), %rax movq 8(%rdi), %r10 mulq %rcx / p = a[1] * digit addq %r10, %rax adcq $0, %rdx / p += r[1] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 8(%rdi) / r[1] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L27 movq 16(%rsi), %rax movq 16(%rdi), %r10 mulq %rcx / p = a[2] * digit addq %r10, %rax adcq $0, %rdx / p += r[2] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 16(%rdi) / r[2] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L27 movq 24(%rsi), %rax movq 24(%rdi), %r10 mulq %rcx / p = a[3] * digit addq %r10, %rax adcq $0, %rdx / p += r[3] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 24(%rdi) / r[3] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L27 movq 32(%rsi), %rax movq 32(%rdi), %r10 mulq %rcx / p = a[4] * digit addq %r10, %rax adcq $0, %rdx / p += r[4] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 32(%rdi) / r[4] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L27 movq 40(%rsi), %rax movq 40(%rdi), %r10 mulq %rcx / p = a[5] * digit addq %r10, %rax adcq $0, %rdx / p += r[5] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 40(%rdi) / r[5] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L27 movq 48(%rsi), %rax movq 48(%rdi), %r10 mulq %rcx / p = a[6] * digit addq %r10, %rax adcq $0, %rdx / p += r[6] addq %r9, %rax adcq $0, %rdx / p += cy movq %rax, 48(%rdi) / r[6] = lo(p) movq %rdx, %r9 / cy = hi(p) decq %r8 jz .L27 .L27: movq %r9, %rax ret .size s_mpv_mul_add_vec64, .-s_mpv_mul_add_vec64