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| author | Robert Griesemer <gri@golang.org> | 2010-04-30 14:41:04 -0700 |
|---|---|---|
| committer | Robert Griesemer <gri@golang.org> | 2010-04-30 14:41:04 -0700 |
| commit | 161b44c76a78ea2b2f04d8c3ba8c8292edac54b4 (patch) | |
| tree | 57fc2a6b6b8434f6f0c61191c3177beeb24610ea | |
| parent | c66b49845c2b8915a033f9957bdcea4a57223125 (diff) | |
| download | go-161b44c76a78ea2b2f04d8c3ba8c8292edac54b4.tar.gz go-161b44c76a78ea2b2f04d8c3ba8c8292edac54b4.zip | |
big/arith: assembly routines for 386 long shifts (2nd round)
R=rsc
CC=golang-dev
https://golang.org/cl/986044
| -rw-r--r-- | src/pkg/big/arith_386.s | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/src/pkg/big/arith_386.s b/src/pkg/big/arith_386.s index 4ccf217ed2..22fde9ccbf 100644 --- a/src/pkg/big/arith_386.s +++ b/src/pkg/big/arith_386.s @@ -101,24 +101,24 @@ E4: CMPL BX, BP // i < n // func shlVW(z, x *Word, s Word, n int) (c Word) TEXT ·shlVW(SB),7,$0 - NOP - JMP ·shlVW_g(SB) // TODO(gri) remove once code below works - MOVL z+0(FP), DI MOVL x+4(FP), SI MOVL s+8(FP), CX - MOVL n+12(FP), BP + MOVL n+12(FP), BX + LEAL (DI)(BX*4), DI + LEAL (SI)(BX*4), SI + NEGL BX // i = -n MOVL $0, AX // c = 0 - MOVL $0, BX // i = 0 JMP E8 -L8: MOVL (SI)(BX*8), DX +L8: MOVL (SI)(BX*4), DX + MOVL DX, BP SHLL CX, DX:AX - MOVL DX, (DI)(BX*8) - MOVL (SI)(BX*8), AX // reload (not enough regs to save original DX) + MOVL DX, (DI)(BX*4) + MOVL BP, AX ADDL $1, BX // i++ -E8: CMPL BX, BP // i < n +E8: CMPL BX, $0 // i < 0 JL L8 MOVL $0, DX @@ -129,9 +129,6 @@ E8: CMPL BX, BP // i < n // func shrVW(z, x *Word, s Word, n int) (c Word) TEXT ·shrVW(SB),7,$0 - NOP - JMP ·shrVW_g(SB) // TODO(gri) remove once code below works - MOVL z+0(FP), DI MOVL x+4(FP), SI MOVL s+8(FP), CX @@ -139,10 +136,10 @@ TEXT ·shrVW(SB),7,$0 MOVL $0, AX // c = 0 JMP E9 -L9: MOVL (SI)(BX*8), DX +L9: MOVL (SI)(BX*4), DX MOVL DX, BP SHRL CX, DX:AX - MOVL DX, (DI)(BX*8) + MOVL DX, (DI)(BX*4) MOVL BP, AX E9: SUBL $1, BX // i-- @@ -161,9 +158,9 @@ TEXT ·mulAddVWW(SB),7,$0 MOVL y+8(FP), BP MOVL r+12(FP), CX // c = r MOVL n+16(FP), BX - LEAL (SI)(BX*4), SI - LEAL (DI)(BX*4), DI - NEGL BX // i = -n + LEAL (DI)(BX*4), DI + LEAL (SI)(BX*4), SI + NEGL BX // i = -n JMP E5 L5: MOVL (SI)(BX*4), AX @@ -187,8 +184,8 @@ TEXT ·addMulVVW(SB),7,$0 MOVL x+4(FP), SI MOVL y+8(FP), BP MOVL n+12(FP), BX - LEAL (SI)(BX*4), SI - LEAL (DI)(BX*4), DI + LEAL (DI)(BX*4), DI + LEAL (SI)(BX*4), SI NEGL BX // i = -n MOVL $0, CX // c = 0 JMP E6 |