Home | History | Annotate | Download | only in x86-atom
      1    /* Copyright (C) 2008 The Android Open Source Project
      2     *
      3     * Licensed under the Apache License, Version 2.0 (the "License");
      4     * you may not use this file except in compliance with the License.
      5     * You may obtain a copy of the License at
      6     *
      7     * http://www.apache.org/licenses/LICENSE-2.0
      8     *
      9     * Unless required by applicable law or agreed to in writing, software
     10     * distributed under the License is distributed on an "AS IS" BASIS,
     11     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12     * See the License for the specific language governing permissions and
     13     * limitations under the License.
     14     */
     15 
     16    /*
     17     * File: OP_USHR_LONG.S
     18     *
     19     * Code: Performs an unsigned shift right long operation. Uses no substitutions.
     20     *
     21     * For: ushr-long
     22     *
     23     * Description: Perform a binary shift operation using two source registers
     24     *              where one is the shift amount and the other is the value to shift.
     25     *
     26     * Format: AA|op CC|BB (23x)
     27     *
     28     * Syntax: op vAA, vBB, vCC
     29     */
     30 
     31     FETCH_CC    1, %eax                 # %eax<- CC
     32     FETCH_BB    1, %edx                 # %edx<- BB
     33     movsd        .LshiftMask, %xmm2     # %xmm2<- mask for the shift bits
     34     movss       (rFP, %eax, 4), %xmm0   # %xmm0<- vCC
     35     pand        %xmm2, %xmm0            # %xmm0<- masked shift bits
     36     movsd       (rFP, %edx, 4), %xmm1   # %xmm1<- vBB
     37     psrlq       %xmm0, %xmm1            # %xmm1<- shifted vBB
     38     movsd       %xmm1, (rFP, rINST, 4)  # vAA<- shifted vBB
     39     FINISH      2                       # jump to next instruction
     40