| // Derived from Inferno's libkern/getfcr-amd64.s | |
| // http://code.google.com/p/inferno-os/source/browse/libkern/getfcr-amd64.s | |
| // | |
| // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. | |
| // Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved. | |
| // Portions Copyright 2009 The Go Authors. All rights reserved. | |
| // | |
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |
| // of this software and associated documentation files (the "Software"), to deal | |
| // in the Software without restriction, including without limitation the rights | |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| // copies of the Software, and to permit persons to whom the Software is | |
| // furnished to do so, subject to the following conditions: | |
| // | |
| // The above copyright notice and this permission notice shall be included in | |
| // all copies or substantial portions of the Software. | |
| // | |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
| // THE SOFTWARE. | |
| TEXT ·SetFPControl(SB), 7, $8 | |
| // Set new | |
| MOVL p+0(FP), DI | |
| XORL $(0x3F<<7), DI | |
| ANDL $0xFFC0, DI | |
| WAIT | |
| STMXCSR 0(SP) | |
| MOVL 0(SP), AX | |
| ANDL $~0x3F, AX | |
| ORL DI, AX | |
| MOVL AX, 0(SP) | |
| LDMXCSR 0(SP) | |
| RET | |
| TEXT ·GetFPControl(SB), 7, $0 | |
| WAIT | |
| STMXCSR 0(SP) | |
| MOVWLZX 0(SP), AX | |
| ANDL $0xFFC0, AX | |
| XORL $(0x3F<<7), AX | |
| MOVL AX, ret+0(FP) | |
| RET | |
| TEXT ·SetFPStatus(SB), $0 | |
| MOVL p+0(FP), DI | |
| ANDL $0x3F, DI | |
| WAIT | |
| STMXCSR 0(SP) | |
| MOVL 0(SP), AX | |
| ANDL $~0x3F, AX | |
| ORL DI, AX | |
| MOVL AX, 0(SP) | |
| LDMXCSR 0(SP) | |
| RET | |
| TEXT ·GetFPStatus(SB), $0 | |
| WAIT | |
| STMXCSR 0(SP) | |
| MOVL 0(SP), AX | |
| ANDL $0x3F, AX | |
| MOVL AX, ret+0(FP) | |
| RET |