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[prefix] Make unlzma.S compatible with 386 class CPUs

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Replace the bswap instruction with xchgb and roll and change the
module architecture from i486 to i386 to be consistent with the rest
of the project.

Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Jaromir Capik
2026-01-12 02:40:28 +01:00
committed by Michael Brown
parent d0ea2b1bb8
commit 641ea020f1
1 changed files with 4 additions and 2 deletions
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6
src/arch/x86/prefix/unlzma.S
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@@ -45,7 +45,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
.section ".note.GNU-stack", "", @progbits
.code32
.arch i486
.arch i386
.section ".prefix.lib", "ax", @progbits
#ifdef CODE16
@@ -962,7 +962,9 @@ decompress:
ADDR32 lodsb /* discard initial byte */
print_hex_byte %al
ADDR32 lodsl
bswapl %eax
xchgb %al, %ah
roll $16, %eax
xchgb %al, %ah
print_hex_dword %eax
print_character $('\n')
movl %eax, rc_code(%ebp)