1 /// @file 2 /// IPF specific application register reading functions 3 /// 4 /// Copyright (c) 2008, Intel Corporation. All rights reserved.<BR> 5 /// This program and the accompanying materials 6 /// are licensed and made available under the terms and conditions of the BSD License 7 /// which accompanies this distribution. The full text of the license may be found at 8 /// http://opensource.org/licenses/bsd-license.php. 9 /// 10 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 /// 13 /// 14 /// 15 16 17 18 //--------------------------------------------------------------------------------- 19 //++ 20 // AsmReadApplicationRegister 21 // 22 // Reads a 64-bit application register. 23 // 24 // Reads and returns the application register specified by Index. 25 // If Index is invalid then 0xFFFFFFFFFFFFFFFF is returned. This function is only available on IPF. 26 // 27 // Arguments : 28 // 29 // On Entry : The index of the application register to read. 30 // 31 // Return Value: The application register specified by Index. 32 // 33 //-- 34 //---------------------------------------------------------------------------------- 35 .text 36 .type AsmReadApplicationRegister, @function 37 .proc AsmReadApplicationRegister 38 .regstk 1, 0, 0, 0 39 40 AsmReadApplicationRegister:: 41 // 42 // ARs are defined in the ranges 0-44 and 64-66 (with some holes). 43 // Compact this list by subtracting 16 from the top range. 44 // 0-44, 64-66 -> 0-44, 48-50 45 // 46 mov r15=2 47 mov r14=pr // save predicates 48 cmp.leu p6,p7=64,in0 // p6 = AR# >= 64 49 ;; 50 (p7) cmp.leu p7,p0=48,in0 // p7 = 32 <= AR# < 64 51 (p6) add in0=-16,in0 // if (AR >= 64) AR# -= 16 52 ;; 53 (p7) mov r15=0 // if bad range (48-63) 54 ;; 55 mov ret0=-1 // in case of illegal AR # 56 shl r15=r15,in0 // r15 = 0x2 << AR# 57 ;; 58 mov pr=r15,-1 59 ;; 60 // 61 // At this point the predicates contain a bit field of the 62 // AR desired. (The bit is the AR+1, since pr0 is always 1.) 63 // 64 .pred.rel "mutex",p1,p2,p3,p4,p5,p6,p7,p8,p17,p18,p19,p20,p22,p25,\ 65 p26,p27,p28,p29,p30,p31,p33,p37,p41,p45,p49,p50,p51 66 (p1) mov ret0=ar.k0 // ar0 67 (p2) mov ret0=ar.k1 // ar1 68 (p3) mov ret0=ar.k2 // ar2 69 (p4) mov ret0=ar.k3 // ar3 70 (p5) mov ret0=ar.k4 // ar4 71 (p6) mov ret0=ar.k5 // ar5 72 (p7) mov ret0=ar.k6 // ar6 73 (p8) mov ret0=ar.k7 // ar7 74 75 (p17) mov ret0=ar.rsc // ar16 76 (p18) mov ret0=ar.bsp // ar17 77 (p19) mov ret0=ar.bspstore // ar18 78 (p20) mov ret0=ar.rnat // ar19 79 80 (p22) mov ret0=ar.fcr // ar21 [iA32] 81 82 (p25) mov ret0=ar.eflag // ar24 [iA32] 83 (p26) mov ret0=ar.csd // ar25 [iA32] 84 (p27) mov ret0=ar.ssd // ar26 [iA32] 85 (p28) mov ret0=ar.cflg // ar27 [iA32] 86 (p29) mov ret0=ar.fsr // ar28 [iA32] 87 (p30) mov ret0=ar.fir // ar29 [iA32] 88 (p31) mov ret0=ar.fdr // ar30 [iA32] 89 90 (p33) mov ret0=ar.ccv // ar32 91 92 (p37) mov ret0=ar.unat // ar36 93 94 (p41) mov ret0=ar.fpsr // ar40 95 96 (p45) mov ret0=ar.itc // ar44 97 98 // 99 // This is the translated (-16) range. 100 // 101 (p49) mov ret0=ar.pfs // ar64 102 (p50) mov ret0=ar.lc // ar65 103 (p51) mov ret0=ar.ec // ar66 104 105 // Restore predicates and return. 106 107 mov pr=r14,-1 108 br.ret.sptk b0 109 .endp 110
