| // 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 |
