[release-branch.go1.25] Revert "crypto/internal/fips140/subtle: add assembly implemen...

This reverts commit 49d6777d87a0abb3eda032da95eff024156835f7.

Reason for revert: doesn't handle unaligned accesses correctly

Fixes #75790

Change-Id: Ia272245a6a2a91b305d411207430bad660ee355b
Reviewed-on: https://go-review.googlesource.com/c/go/+/709757
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
(cherry picked from commit a1661e776f57602b4d4470389a0246f9784fd722)
Reviewed-on: https://go-review.googlesource.com/c/go/+/709798
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

diff --git a/src/crypto/internal/fips140/subtle/xor_asm.go b/src/crypto/internal/fips140/subtle/xor_asm.go
index e10ea8b441429ba12846935328cdb7de9aafed4a..bb85aefef4013e248bb05363450fc338a5fe6350 100644 (file)
--- a/src/crypto/internal/fips140/subtle/xor_asm.go
+++ b/src/crypto/internal/fips140/subtle/xor_asm.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (amd64 || arm64 || mips64 || mips64le || ppc64 || ppc64le || riscv64) && !purego
+//go:build (amd64 || arm64 || ppc64 || ppc64le || riscv64) && !purego
 
 package subtle
 

diff --git a/src/crypto/internal/fips140/subtle/xor_generic.go b/src/crypto/internal/fips140/subtle/xor_generic.go
index 08af84de2a3dabc85ae9230be5056cf5e32e2eca..0b31eec60197d33cc194f022b2e4f473863790b5 100644 (file)
--- a/src/crypto/internal/fips140/subtle/xor_generic.go
+++ b/src/crypto/internal/fips140/subtle/xor_generic.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (!amd64 && !arm64 && !loong64 && !mips64 && !mips64le && !ppc64 && !ppc64le && !riscv64) || purego
+//go:build (!amd64 && !arm64 && !loong64 && !ppc64 && !ppc64le && !riscv64) || purego
 
 package subtle
 

diff --git a/src/crypto/internal/fips140/subtle/xor_mips64x.s b/src/crypto/internal/fips140/subtle/xor_mips64x.s
deleted file mode 100644 (file)
index e580235..0000000
--- a/src/crypto/internal/fips140/subtle/xor_mips64x.s
+++ /dev/null
@@ -1,153 +0,0 @@
-// Copyright 2025 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 (mips64 || mips64le) && !purego
-
-#include "textflag.h"
-
-// func xorBytes(dst, a, b *byte, n int)
-TEXT ·xorBytes(SB), NOSPLIT|NOFRAME, $0
-       MOVV    dst+0(FP), R1
-       MOVV    a+8(FP), R2
-       MOVV    b+16(FP), R3
-       MOVV    n+24(FP), R4
-
-xor_64_check:
-       SGTU    $64, R4, R5 // R5 = 1 if (64 > R4)
-       BNE     R5, xor_32_check
-xor_64:
-       MOVV    (R2), R6
-       MOVV    8(R2), R7
-       MOVV    16(R2), R8
-       MOVV    24(R2), R9
-       MOVV    (R3), R10
-       MOVV    8(R3), R11
-       MOVV    16(R3), R12
-       MOVV    24(R3), R13
-       XOR     R6, R10
-       XOR     R7, R11
-       XOR     R8, R12
-       XOR     R9, R13
-       MOVV    R10, (R1)
-       MOVV    R11, 8(R1)
-       MOVV    R12, 16(R1)
-       MOVV    R13, 24(R1)
-       MOVV    32(R2), R6
-       MOVV    40(R2), R7
-       MOVV    48(R2), R8
-       MOVV    56(R2), R9
-       MOVV    32(R3), R10
-       MOVV    40(R3), R11
-       MOVV    48(R3), R12
-       MOVV    56(R3), R13
-       XOR     R6, R10
-       XOR     R7, R11
-       XOR     R8, R12
-       XOR     R9, R13
-       MOVV    R10, 32(R1)
-       MOVV    R11, 40(R1)
-       MOVV    R12, 48(R1)
-       MOVV    R13, 56(R1)
-       ADDV    $64, R2
-       ADDV    $64, R3
-       ADDV    $64, R1
-       SUBV    $64, R4
-       SGTU    $64, R4, R5
-       BEQ     R0, R5, xor_64
-       BEQ     R0, R4, end
-
-xor_32_check:
-       SGTU    $32, R4, R5
-       BNE     R5, xor_16_check
-xor_32:
-       MOVV    (R2), R6
-       MOVV    8(R2), R7
-       MOVV    16(R2), R8
-       MOVV    24(R2), R9
-       MOVV    (R3), R10
-       MOVV    8(R3), R11
-       MOVV    16(R3), R12
-       MOVV    24(R3), R13
-       XOR     R6, R10
-       XOR     R7, R11
-       XOR     R8, R12
-       XOR     R9, R13
-       MOVV    R10, (R1)
-       MOVV    R11, 8(R1)
-       MOVV    R12, 16(R1)
-       MOVV    R13, 24(R1)
-       ADDV    $32, R2
-       ADDV    $32, R3
-       ADDV    $32, R1
-       SUBV    $32, R4
-       BEQ     R0, R4, end
-
-xor_16_check:
-       SGTU    $16, R4, R5
-       BNE     R5, xor_8_check
-xor_16:
-       MOVV    (R2), R6
-       MOVV    8(R2), R7
-       MOVV    (R3), R8
-       MOVV    8(R3), R9
-       XOR     R6, R8
-       XOR     R7, R9
-       MOVV    R8, (R1)
-       MOVV    R9, 8(R1)
-       ADDV    $16, R2
-       ADDV    $16, R3
-       ADDV    $16, R1
-       SUBV    $16, R4
-       BEQ     R0, R4, end
-
-xor_8_check:
-       SGTU    $8, R4, R5
-       BNE     R5, xor_4_check
-xor_8:
-       MOVV    (R2), R6
-       MOVV    (R3), R7
-       XOR     R6, R7
-       MOVV    R7, (R1)
-       ADDV    $8, R1
-       ADDV    $8, R2
-       ADDV    $8, R3
-       SUBV    $8, R4
-       BEQ     R0, R4, end
-
-xor_4_check:
-       SGTU    $4, R4, R5
-       BNE     R5, xor_2_check
-xor_4:
-       MOVW    (R2), R6
-       MOVW    (R3), R7
-       XOR     R6, R7
-       MOVW    R7, (R1)
-       ADDV    $4, R2
-       ADDV    $4, R3
-       ADDV    $4, R1
-       SUBV    $4, R4
-       BEQ     R0, R4, end
-
-xor_2_check:
-       SGTU    $2, R4, R5
-       BNE     R5, xor_1
-xor_2:
-       MOVH    (R2), R6
-       MOVH    (R3), R7
-       XOR     R6, R7
-       MOVH    R7, (R1)
-       ADDV    $2, R2
-       ADDV    $2, R3
-       ADDV    $2, R1
-       SUBV    $2, R4
-       BEQ     R0, R4, end
-
-xor_1:
-       MOVB    (R2), R6
-       MOVB    (R3), R7
-       XOR     R6, R7
-       MOVB    R7, (R1)
-
-end:
-       RET