Module Name: src Committed By: jakllsch Date: Wed Dec 29 22:40:46 UTC 2010
Modified Files: src/sys/arch/i386/stand/lib: bios_disk.S Log Message: Utilize movz[bw]l to save a few instrutions and bytes of .text. To generate a diff of this commit: cvs rdiff -u -r1.19 -r1.20 src/sys/arch/i386/stand/lib/bios_disk.S Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/arch/i386/stand/lib/bios_disk.S diff -u src/sys/arch/i386/stand/lib/bios_disk.S:1.19 src/sys/arch/i386/stand/lib/bios_disk.S:1.20 --- src/sys/arch/i386/stand/lib/bios_disk.S:1.19 Sat Nov 21 11:52:57 2009 +++ src/sys/arch/i386/stand/lib/bios_disk.S Wed Dec 29 22:40:46 2010 @@ -1,4 +1,4 @@ -/* $NetBSD: bios_disk.S,v 1.19 2009/11/21 11:52:57 dsl Exp $ */ +/* $NetBSD: bios_disk.S,v 1.20 2010/12/29 22:40:46 jakllsch Exp $ */ /* * Ported to boot 386BSD by Julian Elischer (jul...@tfs.com) Sept 1992 @@ -82,8 +82,7 @@ calll _C_LABEL(real_to_prot) # back to protected mode .code32 - xorl %eax, %eax - movw %bx, %ax # return value in %ax + movzwl %bx, %eax # return value in %eax pop %edi pop %edx @@ -146,7 +145,7 @@ calll _C_LABEL(real_to_prot) # back to protected mode .code32 - andl $0xffff, %eax + movzwl %ax, %eax # return value in %eax pop %edi pop %esi @@ -246,8 +245,7 @@ calll _C_LABEL(real_to_prot) # switch back .code32 - xorl %eax, %eax - movb %dl, %al # return value in %ax + movzbl %dl, %eax # return value in %eax cmpw $0xaa55, %bx sete %dl @@ -304,8 +302,7 @@ calll _C_LABEL(real_to_prot) # back to protected mode .code32 - xorl %eax, %eax - movw %bx, %ax # return value in %ax + movzwl %bx, %eax # return value in %eax pop %edi pop %esi @@ -346,8 +343,7 @@ calll _C_LABEL(real_to_prot) # back to protected mode .code32 - xorl %eax, %eax - movb %bl, %al # return value in %ax + movzbl %bl, %eax # return value in %eax pop %edi pop %esi