--- /dev/null
+dnl AMD64 mpn_mul_2 -- Multiply an n-limb vector with a 2-limb vector and
+dnl store the result in a third limb vector.
+
+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: 2.275
+C K10: 2.275
+C P4: ?
+C P6-15: 4.0
+
+C This code is the result of running a code generation and optimization tool
+C suite written by David Harvey and Torbjorn Granlund.
+
+C TODO
+C * Work on feed-in and wind-down code.
+C * Convert "mov $0" to "xor".
+C * Adjust initial lea to save some bytes.
+C * Perhaps adjust n from n_param&3 value?
+C * Replace with 2.25 c/l sequence.
+
+C INPUT PARAMETERS
+define(`rp', `%rdi')
+define(`up', `%rsi')
+define(`n_param',`%rdx')
+define(`vp', `%rcx')
+
+define(`v0', `%r8')
+define(`v1', `%r9')
+define(`w0', `%rbx')
+define(`w1', `%rcx')
+define(`w2', `%rbp')
+define(`w3', `%r10')
+define(`n', `%r11')
+
+ASM_START()
+ TEXT
+ ALIGN(16)
+PROLOGUE(mpn_mul_2)
+ push %rbx
+ push %rbp
+
+ mov (vp), v0
+ mov 8(vp), v1
+
+ mov (up), %rax
+
+ mov n_param, n
+ neg n
+ lea -8(up,n_param,8), up
+ lea -8(rp,n_param,8), rp
+
+ and $3, R32(n_param)
+ jz L(m2p0)
+ cmp $2, R32(n_param)
+ jc L(m2p1)
+ jz L(m2p2)
+L(m2p3):
+ mul v0
+ xor R32(w3), R32(w3)
+ mov %rax, w1
+ mov %rdx, w2
+ mov 8(up,n,8), %rax
+ add $-1, n
+ mul v1
+ add %rax, w2
+ jmp L(m23)
+L(m2p0):
+ mul v0
+ xor R32(w2), R32(w2)
+ mov %rax, w0
+ mov %rdx, w1
+ jmp L(m20)
+L(m2p1):
+ mul v0
+ xor R32(w3), R32(w3)
+ xor R32(w0), R32(w0)
+ xor R32(w1), R32(w1)
+ add $1, n
+ jmp L(m2top)
+L(m2p2):
+ mul v0
+ xor R32(w0), R32(w0)
+ xor R32(w1), R32(w1)
+ mov %rax, w2
+ mov %rdx, w3
+ mov 8(up,n,8), %rax
+ add $-2, n
+ jmp L(m22)
+
+
+ ALIGN(32)
+L(m2top):
+ add %rax, w3
+ adc %rdx, w0
+ mov 0(up,n,8), %rax
+ adc $0, R32(w1)
+ mov $0, R32(w2)
+ mul v1
+ add %rax, w0
+ mov w3, 0(rp,n,8)
+ adc %rdx, w1
+ mov 8(up,n,8), %rax
+ mul v0
+ add %rax, w0
+ adc %rdx, w1
+ adc $0, R32(w2)
+L(m20): mov 8(up,n,8), %rax
+ mul v1
+ add %rax, w1
+ adc %rdx, w2
+ mov 16(up,n,8), %rax
+ mov $0, R32(w3)
+ mul v0
+ add %rax, w1
+ mov 16(up,n,8), %rax
+ adc %rdx, w2
+ adc $0, R32(w3)
+ mul v1
+ add %rax, w2
+ mov w0, 8(rp,n,8)
+L(m23): adc %rdx, w3
+ mov 24(up,n,8), %rax
+ mul v0
+ mov $0, R32(w0)
+ add %rax, w2
+ adc %rdx, w3
+ mov w1, 16(rp,n,8)
+ mov 24(up,n,8), %rax
+ mov $0, R32(w1)
+ adc $0, R32(w0)
+L(m22): mul v1
+ add %rax, w3
+ mov w2, 24(rp,n,8)
+ adc %rdx, w0
+ mov 32(up,n,8), %rax
+ mul v0
+ add $4, n
+ js L(m2top)
+
+
+ add %rax, w3
+ adc %rdx, w0
+ adc $0, R32(w1)
+ mov (up), %rax
+ mul v1
+ mov w3, (rp)
+ add %rax, w0
+ adc %rdx, w1
+ mov w0, 8(rp)
+ mov w1, %rax
+
+ pop %rbp
+ pop %rbx
+ ret
+EPILOGUE()
projects / msp430-gcc.git / blobdiff