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// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build !math_big_pure_go #include "textflag.h" // This file provides fast assembly versions for the elementary // arithmetic operations on vectors implemented in arith.go. // func addVV(z, x, y []Word) (c Word) TEXT ·addVV(SB),NOSPLIT,$0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL y+24(FP), CX MOVL z_len+4(FP), BP MOVL $0, BX // i = 0 MOVL $0, DX // c = 0 JMP E1 L1: MOVL (SI)(BX*4), AX ADDL DX, DX // restore CF ADCL (CX)(BX*4), AX SBBL DX, DX // save CF MOVL AX, (DI)(BX*4) ADDL $1, BX // i++ E1: CMPL BX, BP // i < n JL L1 NEGL DX MOVL DX, c+36(FP) RET // func subVV(z, x, y []Word) (c Word) // (same as addVV except for SBBL instead of ADCL and label names) TEXT ·subVV(SB),NOSPLIT,$0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL y+24(FP), CX MOVL z_len+4(FP), BP MOVL $0, BX // i = 0 MOVL $0, DX // c = 0 JMP E2 L2: MOVL (SI)(BX*4), AX ADDL DX, DX // restore CF SBBL (CX)(BX*4), AX SBBL DX, DX // save CF MOVL AX, (DI)(BX*4) ADDL $1, BX // i++ E2: CMPL BX, BP // i < n JL L2 NEGL DX MOVL DX, c+36(FP) RET // func addVW(z, x []Word, y Word) (c Word) TEXT ·addVW(SB),NOSPLIT,$0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL y+24(FP), AX // c = y MOVL z_len+4(FP), BP MOVL $0, BX // i = 0 JMP E3 L3: ADDL (SI)(BX*4), AX MOVL AX, (DI)(BX*4) SBBL AX, AX // save CF NEGL AX ADDL $1, BX // i++ E3: CMPL BX, BP // i < n JL L3 MOVL AX, c+28(FP) RET // func subVW(z, x []Word, y Word) (c Word) TEXT ·subVW(SB),NOSPLIT,$0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL y+24(FP), AX // c = y MOVL z_len+4(FP), BP MOVL $0, BX // i = 0 JMP E4 L4: MOVL (SI)(BX*4), DX SUBL AX, DX MOVL DX, (DI)(BX*4) SBBL AX, AX // save CF NEGL AX ADDL $1, BX // i++ E4: CMPL BX, BP // i < n JL L4 MOVL AX, c+28(FP) RET // func shlVU(z, x []Word, s uint) (c Word) TEXT ·shlVU(SB),NOSPLIT,$0 MOVL z_len+4(FP), BX // i = z SUBL $1, BX // i-- JL X8b // i < 0 (n <= 0) // n > 0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL s+24(FP), CX MOVL (SI)(BX*4), AX // w1 = x[n-1] MOVL $0, DX SHLL CX, AX, DX // w1>>ŝ MOVL DX, c+28(FP) CMPL BX, $0 JLE X8a // i <= 0 // i > 0 L8: MOVL AX, DX // w = w1 MOVL -4(SI)(BX*4), AX // w1 = x[i-1] SHLL CX, AX, DX // w<<s | w1>>ŝ MOVL DX, (DI)(BX*4) // z[i] = w<<s | w1>>ŝ SUBL $1, BX // i-- JG L8 // i > 0 // i <= 0 X8a: SHLL CX, AX // w1<<s MOVL AX, (DI) // z[0] = w1<<s RET X8b: MOVL $0, c+28(FP) RET // func shrVU(z, x []Word, s uint) (c Word) TEXT ·shrVU(SB),NOSPLIT,$0 MOVL z_len+4(FP), BP SUBL $1, BP // n-- JL X9b // n < 0 (n <= 0) // n > 0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL s+24(FP), CX MOVL (SI), AX // w1 = x[0] MOVL $0, DX SHRL CX, AX, DX // w1<<ŝ MOVL DX, c+28(FP) MOVL $0, BX // i = 0 JMP E9 // i < n-1 L9: MOVL AX, DX // w = w1 MOVL 4(SI)(BX*4), AX // w1 = x[i+1] SHRL CX, AX, DX // w>>s | w1<<ŝ MOVL DX, (DI)(BX*4) // z[i] = w>>s | w1<<ŝ ADDL $1, BX // i++ E9: CMPL BX, BP JL L9 // i < n-1 // i >= n-1 X9a: SHRL CX, AX // w1>>s MOVL AX, (DI)(BP*4) // z[n-1] = w1>>s RET X9b: MOVL $0, c+28(FP) RET // func mulAddVWW(z, x []Word, y, r Word) (c Word) TEXT ·mulAddVWW(SB),NOSPLIT,$0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL y+24(FP), BP MOVL r+28(FP), CX // c = r MOVL z_len+4(FP), BX LEAL (DI)(BX*4), DI LEAL (SI)(BX*4), SI NEGL BX // i = -n JMP E5 L5: MOVL (SI)(BX*4), AX MULL BP ADDL CX, AX ADCL $0, DX MOVL AX, (DI)(BX*4) MOVL DX, CX ADDL $1, BX // i++ E5: CMPL BX, $0 // i < 0 JL L5 MOVL CX, c+32(FP) RET // func addMulVVW(z, x []Word, y Word) (c Word) TEXT ·addMulVVW(SB),NOSPLIT,$0 MOVL z+0(FP), DI MOVL x+12(FP), SI MOVL y+24(FP), BP MOVL z_len+4(FP), BX LEAL (DI)(BX*4), DI LEAL (SI)(BX*4), SI NEGL BX // i = -n MOVL $0, CX // c = 0 JMP E6 L6: MOVL (SI)(BX*4), AX MULL BP ADDL CX, AX ADCL $0, DX ADDL AX, (DI)(BX*4) ADCL $0, DX MOVL DX, CX ADDL $1, BX // i++ E6: CMPL BX, $0 // i < 0 JL L6 MOVL CX, c+28(FP) RET