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// Inferno's libkern/vlop-386.s // https://bitbucket.org/inferno-os/inferno-os/src/master/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(lo64 *uint64, a uint64, b uint32) (hi32 uint32) // sets *lo64 = low 64 bits of 96-bit product a*b; returns high 32 bits. TEXT runtime·_mul64by32(SB), NOSPLIT, $0 MOVL lo64+0(FP), CX MOVL a_lo+4(FP), AX MULL b+12(FP) MOVL AX, 0(CX) MOVL DX, BX MOVL a_hi+8(FP), AX MULL b+12(FP) ADDL AX, BX ADCL $0, DX MOVL BX, 4(CX) MOVL DX, AX MOVL AX, hi32+16(FP) RET TEXT runtime·_div64by32(SB), NOSPLIT, $0 MOVL r+12(FP), CX MOVL a_lo+0(FP), AX MOVL a_hi+4(FP), DX DIVL b+8(FP) MOVL DX, 0(CX) MOVL AX, q+16(FP) RET