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Diffstat (limited to 'src/runtime/vlop_386.s')
| -rw-r--r-- | src/runtime/vlop_386.s | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/runtime/vlop_386.s b/src/runtime/vlop_386.s new file mode 100644 index 000000000..ce8e7d064 --- /dev/null +++ b/src/runtime/vlop_386.s @@ -0,0 +1,56 @@ +// Inferno's libkern/vlop-386.s +// http://code.google.com/p/inferno-os/source/browse/libkern/vlop-386.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. + +#include "textflag.h" + +/* + * C runtime for 64-bit divide. + */ + +// runtime·_mul64x32(r *uint64, a uint64, b uint32) uint32 +// sets *r = low 64 bits of 96-bit product a*b; returns high 32 bits. +TEXT runtime·_mul64by32(SB), NOSPLIT, $0 + MOVL r+0(FP), CX + MOVL a+4(FP), AX + MULL b+12(FP) + MOVL AX, 0(CX) + MOVL DX, BX + MOVL a+8(FP), AX + MULL b+12(FP) + ADDL AX, BX + ADCL $0, DX + MOVL BX, 4(CX) + MOVL DX, AX + MOVL AX, ret+16(FP) + RET + +TEXT runtime·_div64by32(SB), NOSPLIT, $0 + MOVL r+12(FP), CX + MOVL a+0(FP), AX + MOVL a+4(FP), DX + DIVL b+8(FP) + MOVL DX, 0(CX) + MOVL AX, ret+16(FP) + RET |