| /* Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * File: OP_CMPL_FLOAT.S |
| * |
| * Code: Provides a "nan" variable to specify the return value for |
| * NaN. Provides a variable "sod" which appends a "s" or a "d" |
| * to the move and comparison instructions, depending on if we |
| * are working with a float or a double. For instructions |
| * cmpx-float and cmpx-double, the x will be eiher a g or a l |
| * to specify positive or negative bias for NaN. |
| * |
| * For: cmpg-double, dmpg-float, cmpl-double, cmpl-float |
| * |
| * Description: Perform the indicated floating point or long comparison, |
| * storing 0 if the two arguments are equal, 1 if the second |
| * argument is larger, or -1 if the first argument is larger. |
| * |
| * Format: AA|op CC|BB (23x) |
| * |
| * Syntax: op vAA, vBB, vCC |
| */ |
| |
| %default { "nan":"$0xFFFFFFFF" , "sod":"s" } |
| |
| FETCH_BB 1, %ecx # %ecx<- BB |
| FETCH_CC 1, %edx # %edx<- CC |
| |
| fld$sod (rFP, %edx, 4) |
| fld$sod (rFP, %ecx, 4) |
| |
| fucompp |
| fnstsw %ax |
| sahf |
| |
| FFETCH_ADV 2, %eax # %eax<- next instruction hi; fetch, advance |
| ja .L${opcode}_greater |
| jp .L${opcode}_finalNan |
| jz .L${opcode}_final |
| |
| .L${opcode}_less: |
| movl $$0xFFFFFFFF, (rFP, rINST, 4) # vAA<- less than |
| FGETOP_JMP 2, %eax # jump to next instruction; getop, jmp |
| |
| %break |
| .L${opcode}_greater: |
| movl $$0x1, (rFP, rINST, 4) # vAA<- greater than |
| FGETOP_JMP 2, %eax # jump to next instruction; getop, jmp |
| |
| .L${opcode}_final: |
| movl $$0x0, (rFP, rINST, 4) # vAA<- equal |
| FGETOP_JMP 2, %eax # jump to next instruction; getop, jmp |
| |
| .L${opcode}_finalNan: |
| movl $nan, (rFP, rINST, 4) # vAA<- NaN |
| FGETOP_JMP 2, %eax # jump to next instruction; getop, jmp |
