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_FLOAT_TO_INT.S 18 * 19 * Code: Converts a float to a int. Uses no substitutions. 20 * 21 * For: float-to-int 22 * 23 * Description: Convert the float in source register to a int 24 * and store the result in the destintation register 25 * 26 * Format: B|A|op (12x) 27 * 28 * Syntax: op vA, vB 29 */ 30 31 movl rINST, %edx # %edx<- BA 32 shr $$4, rINST # rINST<- B 33 and $$15, %edx # %edx<- A 34 flds (rFP, rINST, 4) # push vB to floating point stack 35 fildl .LintMax # push max int value 36 fildl .LintMin # push min int value 37 fucomip %st(2), %st(0) # check for negInf 38 jae .L${opcode}_negInf # handle negInf 39 fucomip %st(1), %st(0) # check for posInf or NaN 40 jc .L${opcode}_nanInf # handle posInf or NaN 41 jmp .L${opcode}_break # do conversion 42 %break 43 44 .L${opcode}_break: 45 fnstcw -2(%esp) # save control word 46 orl $$0xc00, -2(%esp) # reset control 47 fldcw -2(%esp) # load control word 48 xorl $$0xc00, -2(%esp) # reset control 49 fistpl (rFP, %edx, 4) # move converted int 50 fldcw -2(%esp) # load saved control word 51 FINISH 1 # jump to next instruction 52 53 .L${opcode}_nanInf: 54 jnp .L${opcode}_posInf # handle posInf 55 fstps (rFP, %edx, 4) # pop floating point stack 56 movl $$0x00000000, (rFP, %edx, 4) # vA<- NaN 57 FINISH 1 # jump to next instruction 58 59 .L${opcode}_posInf: 60 fstps (rFP, %edx, 4) # pop floating point stack 61 movl $$0x7FFFFFFF, (rFP, %edx, 4) # vA<- posInf 62 FINISH 1 # jump to next instruction 63 64 .L${opcode}_negInf: 65 fstps (rFP, %edx, 4) # pop floating point stack 66 fstps (rFP, %edx, 4) # pop floating point stack 67 movl $$0x80000000, (rFP, %edx, 4) # vA<- negInf 68 FINISH 1 # jump to next instruction 69
