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Diffstat (limited to 'src/pkg/math/fltasm_amd64.s')
| -rw-r--r-- | src/pkg/math/fltasm_amd64.s | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/pkg/math/fltasm_amd64.s b/src/pkg/math/fltasm_amd64.s new file mode 100644 index 000000000..66442cd30 --- /dev/null +++ b/src/pkg/math/fltasm_amd64.s @@ -0,0 +1,67 @@ +// 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 |