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40ef1faabc
Encode the flag results in an auxint field instead of having one opcode per flag state. This helps us handle the new *noov branches in a unified manner. This is only for arm, arm64 is in a subsequent CL. We could extend to other architectures as well, athough it would only be cleanup, no behavioral change. Update #39505 Change-Id: Ia46cea596faad540d1496c5915ab1274571543f0 Reviewed-on: https://go-review.googlesource.com/c/go/+/238077 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
31 lines
550 B
ArmAsm
31 lines
550 B
ArmAsm
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build amd64
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#include "textflag.h"
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TEXT ·asmAddFlags(SB),NOSPLIT,$0-24
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MOVQ x+0(FP), AX
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ADDQ y+8(FP), AX
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PUSHFQ
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POPQ AX
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MOVQ AX, ret+16(FP)
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RET
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TEXT ·asmSubFlags(SB),NOSPLIT,$0-24
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MOVQ x+0(FP), AX
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SUBQ y+8(FP), AX
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PUSHFQ
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POPQ AX
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MOVQ AX, ret+16(FP)
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RET
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TEXT ·asmAndFlags(SB),NOSPLIT,$0-24
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MOVQ x+0(FP), AX
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ANDQ y+8(FP), AX
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PUSHFQ
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POPQ AX
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MOVQ AX, ret+16(FP)
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RET
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