aorrlsh2_n.asm
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上传日期:2022-08-06
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- dnl AMD64 mpn_addlsh2_n and mpn_rsblsh2_n. R = 2*V +- U.
- dnl ("rsb" means reversed subtract, name mandated by mpn_sublsh2_n which
- dnl subtacts the shifted operand from the unshifted operand.)
- dnl Copyright 2009 Free Software Foundation, Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- 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 Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- C cycles/limb
- C K8,K9: 2
- C K10: 2
- C P4: ?
- C P6 core2: 3
- C P6 corei7: 2.75
- C P6 atom: ?
- C INPUT PARAMETERS
- define(`rp', `%rdi')
- define(`up', `%rsi')
- define(`vp', `%rdx')
- define(`n', `%rcx')
- ifdef(`OPERATION_addlsh2_n',`
- define(ADDSUB, `add')
- define(ADCSBB, `adc')
- define(func, mpn_addlsh2_n)')
- ifdef(`OPERATION_rsblsh2_n',`
- define(ADDSUB, `sub')
- define(ADCSBB, `sbb')
- define(func, mpn_rsblsh2_n)')
- MULFUNC_PROLOGUE(mpn_addlsh2_n mpn_rsblsh2_n)
- ASM_START()
- TEXT
- ALIGN(16)
- PROLOGUE(func)
- push %r12
- push %r13
- push %r14
- push %r15
- mov (vp), %r8
- lea (,%r8,4), %r12
- shr $62, %r8
- mov R32(n), R32(%rax)
- lea (rp,n,8), rp
- lea (up,n,8), up
- lea (vp,n,8), vp
- neg n
- and $3, R8(%rax)
- je L(b00)
- cmp $2, R8(%rax)
- jc L(b01)
- je L(b10)
- L(b11): mov 8(vp,n,8), %r10
- lea (%r8,%r10,4), %r14
- shr $62, %r10
- mov 16(vp,n,8), %r11
- lea (%r10,%r11,4), %r15
- shr $62, %r11
- ADDSUB (up,n,8), %r12
- ADCSBB 8(up,n,8), %r14
- ADCSBB 16(up,n,8), %r15
- sbb R32(%rax), R32(%rax) C save carry for next
- mov %r12, (rp,n,8)
- mov %r14, 8(rp,n,8)
- mov %r15, 16(rp,n,8)
- add $3, n
- js L(top)
- jmp L(end)
- L(b01): mov %r8, %r11
- ADDSUB (up,n,8), %r12
- sbb R32(%rax), R32(%rax) C save carry for next
- mov %r12, (rp,n,8)
- add $1, n
- js L(top)
- jmp L(end)
- L(b10): mov 8(vp,n,8), %r11
- lea (%r8,%r11,4), %r15
- shr $62, %r11
- ADDSUB (up,n,8), %r12
- ADCSBB 8(up,n,8), %r15
- sbb R32(%rax), R32(%rax) C save carry for next
- mov %r12, (rp,n,8)
- mov %r15, 8(rp,n,8)
- add $2, n
- js L(top)
- jmp L(end)
- L(b00): mov 8(vp,n,8), %r9
- mov 16(vp,n,8), %r10
- jmp L(e00)
- ALIGN(16)
- L(top): mov 16(vp,n,8), %r10
- mov (vp,n,8), %r8
- mov 8(vp,n,8), %r9
- lea (%r11,%r8,4), %r12
- shr $62, %r8
- L(e00): lea (%r8,%r9,4), %r13
- shr $62, %r9
- mov 24(vp,n,8), %r11
- lea (%r9,%r10,4), %r14
- shr $62, %r10
- lea (%r10,%r11,4), %r15
- shr $62, %r11
- add R32(%rax), R32(%rax) C restore carry
- ADCSBB (up,n,8), %r12
- ADCSBB 8(up,n,8), %r13
- ADCSBB 16(up,n,8), %r14
- ADCSBB 24(up,n,8), %r15
- mov %r12, (rp,n,8)
- mov %r13, 8(rp,n,8)
- mov %r14, 16(rp,n,8)
- sbb R32(%rax), R32(%rax) C save carry for next
- mov %r15, 24(rp,n,8)
- add $4, n
- js L(top)
- L(end):
- ifdef(`OPERATION_addlsh2_n',`
- sub R32(%r11), R32(%rax)
- neg R32(%rax)')
- ifdef(`OPERATION_rsblsh2_n',`
- add R32(%r11), R32(%rax)
- movslq R32(%rax), %rax')
- pop %r15
- pop %r14
- pop %r13
- pop %r12
- ret
- EPILOGUE()