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Avoid clobbering non-volatile XMM registers

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This affects some Poly1305 assembler functions
which are only used for certain CPU types.

Remove those functions for Windows targets,
as a simple interim solution.

Fixes #21522

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21808)
This commit is contained in:
Bernd Edlinger 2023-08-22 16:07:30 +02:00
parent 9ff816106c
commit 7b8e27bc2e
1 changed files with 2 additions and 2 deletions
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4
crypto/poly1305/asm/poly1305-x86_64.pl
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@ -195,7 +195,7 @@ $code.=<<___ if ($avx>1);
bt \$`5+32`,%r9 # AVX2?
cmovc %rax,%r10
___
$code.=<<___ if ($avx>3);
$code.=<<___ if ($avx>3 && !$win64);
mov \$`(1<<31|1<<21|1<<16)`,%rax
shr \$32,%r9
and %rax,%r9
@ -2724,7 +2724,7 @@ $code.=<<___;
.cfi_endproc
.size poly1305_blocks_avx512,.-poly1305_blocks_avx512
___
if ($avx>3) {
if ($avx>3 && !$win64) {
########################################################################
# VPMADD52 version using 2^44 radix.
#