diff options
Diffstat (limited to 'gmp-6.3.0/mpn/x86_64/missing.asm')
| -rw-r--r-- | gmp-6.3.0/mpn/x86_64/missing.asm | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/x86_64/missing.asm b/gmp-6.3.0/mpn/x86_64/missing.asm new file mode 100644 index 0000000..9b65c89 --- /dev/null +++ b/gmp-6.3.0/mpn/x86_64/missing.asm @@ -0,0 +1,130 @@ + + dnl AMD64 MULX/ADX simulation support. + +dnl Contributed to the GNU project by Torbjörn Granlund. + +dnl Copyright 2013 Free Software Foundation, Inc. + +dnl This file is part of the GNU MP Library. +dnl +dnl The GNU MP Library is free software; you can redistribute it and/or modify +dnl it under the terms of either: +dnl +dnl * the GNU Lesser General Public License as published by the Free +dnl Software Foundation; either version 3 of the License, or (at your +dnl option) any later version. +dnl +dnl or +dnl +dnl * the GNU General Public License as published by the Free Software +dnl Foundation; either version 2 of the License, or (at your option) any +dnl later version. +dnl +dnl or both in parallel, as here. +dnl +dnl The GNU MP Library is distributed in the hope that it will be useful, but +dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +dnl for more details. +dnl +dnl You should have received copies of the GNU General Public License and the +dnl GNU Lesser General Public License along with the GNU MP Library. If not, +dnl see https://www.gnu.org/licenses/. + + +include(`../config.m4') + +ASM_START() + +C Fake the MULX instruction +C +C Accept the single explicit parameter on the stack, return the two result +C words on the stack. This calling convention means that we need to move the +C return address up. +C +PROLOGUE(__gmp_mulx) + lea -8(%rsp), %rsp + push %rax + push %rdx + pushfq C preserve all flags + mov 32(%rsp), %rax C move retaddr... + mov %rax, 24(%rsp) C ...up the stack + mov 40(%rsp), %rax C input parameter + mul %rdx + mov %rax, 32(%rsp) + mov %rdx, 40(%rsp) + popfq C restore eflags + pop %rdx + pop %rax + ret +EPILOGUE() +PROTECT(__gmp_mulx) + + +C Fake the ADOX instruction +C +C Accept the two parameters on the stack, return the result word on the stack. +C This calling convention means that we need to move the return address down. +C +PROLOGUE(__gmp_adox) + push %rcx + push %rbx + push %rax + mov 32(%rsp), %rcx C src2 + mov 24(%rsp), %rax C move retaddr... + mov %rax, 32(%rsp) C ...down the stack + pushfq +C copy 0(%rsp):11 to 0(%rsp):0 + mov (%rsp), %rbx + shr %rbx + bt $10, %rbx + adc %rbx, %rbx + push %rbx +C put manipulated flags into eflags, execute a plain adc + popfq + adc %rcx, 48(%rsp) +C copy CF to 0(%rsp):11 + pop %rbx + sbb R32(%rax), R32(%rax) + and $0x800, R32(%rax) + and $0xfffffffffffff7ff, %rbx + or %rax, %rbx + push %rbx +C put manipulated flags into eflags + popfq + pop %rax + pop %rbx + pop %rcx + lea 8(%rsp), %rsp + ret +EPILOGUE() +PROTECT(__gmp_adox) + + +C Fake the ADCX instruction +C +C Accept the two parameters on the stack, return the result word on the stack. +C This calling convention means that we need to move the return address down. +C +PROLOGUE(__gmp_adcx) + push %rcx + push %rbx + push %rax + mov 32(%rsp), %rcx C src2 + mov 24(%rsp), %rax C move retaddr... + mov %rax, 32(%rsp) C ...down the stack + pushfq + adc %rcx, 48(%rsp) + pop %rbx + sbb R32(%rax), R32(%rax) + and $`'0xfffffffffffffffe, %rbx + sub %rax, %rbx + push %rbx + popfq + pop %rax + pop %rbx + pop %rcx + lea 8(%rsp), %rsp + ret +EPILOGUE() +PROTECT(__gmp_adcx) |