--- /dev/null
+dnl AMD64 mpn_addlsh1_n, mpn_sublsh1_n -- rp[] = up[] +- (vp[] << 1),
+dnl optimized for Pentium 4.
+
+dnl Copyright 2008 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: 3.8
+C K10: 4.8
+C P4: 5.8
+C P6-15: ?
+
+
+C INPUT PARAMETERS
+define(`rp',`%rdi')
+define(`up',`%rsi')
+define(`vp',`%rdx')
+define(`n', `%rcx')
+
+ifdef(`OPERATION_addlsh1_n', `
+ define(ADDSUB, add)
+ define(func, mpn_addlsh1_n)')
+ifdef(`OPERATION_sublsh1_n', `
+ define(ADDSUB, sub)
+ define(func, mpn_sublsh1_n)')
+
+MULFUNC_PROLOGUE(mpn_addlsh1_n mpn_sublsh1_n)
+
+ASM_START()
+ TEXT
+ ALIGN(16)
+PROLOGUE(func)
+ push %rbx
+ push %r12
+ push %rbp
+
+ mov (vp), %r9
+ shl %r9
+ mov 4(vp), R32(%rbp)
+
+ xor R32(%rbx), R32(%rbx)
+
+ mov R32(n), R32(%rax)
+ and $3, R32(%rax)
+ jne L(n00) C n = 0, 4, 8, ...
+
+ mov (up), %r8
+ mov 8(up), %r10
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r8
+ mov 8(vp), %r9
+ lea (%rbp,%r9,2), %r9
+ setc R8(%rax)
+ mov 12(vp), R32(%rbp)
+ lea -16(rp), rp
+ jmp L(L00)
+
+L(n00): cmp $2, R32(%rax)
+ jnc L(n01) C n = 1, 5, 9, ...
+ mov (up), %r11
+ lea -8(rp), rp
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r11
+ setc R8(%rbx)
+ dec n
+ jz L(1) C jump for n = 1
+ mov 8(up), %r8
+ mov 8(vp), %r9
+ lea (%rbp,%r9,2), %r9
+ mov 12(vp), R32(%rbp)
+ lea 8(up), up
+ lea 8(vp), vp
+ jmp L(L01)
+
+L(n01): jne L(n10) C n = 2, 6, 10, ...
+ mov (up), %r12
+ mov 8(up), %r11
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r12
+ mov 8(vp), %r9
+ lea (%rbp,%r9,2), %r9
+ setc R8(%rax)
+ mov 12(vp), R32(%rbp)
+ lea 16(up), up
+ lea 16(vp), vp
+ jmp L(L10)
+
+L(n10): mov (up), %r10
+ mov 8(up), %r12
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r10
+ mov 8(vp), %r9
+ lea (%rbp,%r9,2), %r9
+ setc R8(%rbx)
+ mov 12(vp), R32(%rbp)
+ lea -24(rp), rp
+ lea -8(up), up
+ lea -8(vp), vp
+ jmp L(L11)
+
+L(c0): mov $1, R8(%rbx)
+ jmp L(rc0)
+L(c1): mov $1, R8(%rax)
+ jmp L(rc1)
+L(c2): mov $1, R8(%rbx)
+ jmp L(rc2)
+
+ ALIGN(16)
+L(top): mov (up), %r8 C not on critical path
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r11 C not on critical path
+ mov (vp), %r9
+ lea (%rbp,%r9,2), %r9
+ setc R8(%rbx) C save carry out
+ mov 4(vp), R32(%rbp)
+ mov %r12, (rp)
+ ADDSUB %rax, %r11 C apply previous carry out
+ jc L(c0) C jump if ripple
+L(rc0):
+L(L01): mov 8(up), %r10
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r8
+ mov 8(vp), %r9
+ lea (%rbp,%r9,2), %r9
+ setc R8(%rax)
+ mov 12(vp), R32(%rbp)
+ mov %r11, 8(rp)
+ ADDSUB %rbx, %r8
+ jc L(c1)
+L(rc1):
+L(L00): mov 16(up), %r12
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r10
+ mov 16(vp), %r9
+ lea (%rbp,%r9,2), %r9
+ setc R8(%rbx)
+ mov 20(vp), R32(%rbp)
+ mov %r8, 16(rp)
+ ADDSUB %rax, %r10
+ jc L(c2)
+L(rc2):
+L(L11): mov 24(up), %r11
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r12
+ mov 24(vp), %r9
+ lea (%rbp,%r9,2), %r9
+ lea 32(up), up
+ lea 32(vp), vp
+ setc R8(%rax)
+ mov -4(vp), R32(%rbp)
+ mov %r10, 24(rp)
+ ADDSUB %rbx, %r12
+ jc L(c3)
+L(rc3): lea 32(rp), rp
+L(L10): sub $4, n
+ ja L(top)
+
+L(end):
+ shr $31, R32(%rbp)
+ ADDSUB %r9, %r11
+ setc R8(%rbx)
+ mov %r12, (rp)
+ ADDSUB %rax, %r11
+ jnc L(1)
+ mov $1, R8(%rbx)
+L(1): mov %r11, 8(rp)
+ lea (%rbx,%rbp), R32(%rax)
+ pop %rbp
+ pop %r12
+ pop %rbx
+ emms
+ ret
+L(c3): mov $1, R8(%rax)
+ jmp L(rc3)
+EPILOGUE()
+ASM_END()
projects / msp430-gcc.git / blobdiff