wok diff linld/stuff/src/MEMCPY32.ASM @ rev 25697
dool: reduced size of package
| author | Hans-G?nter Theisgen |
|---|---|
| date | Sun May 12 07:10:04 2024 +0100 (2 weeks ago) |
| parents | 217c02cbbe8d |
| children |
line diff
1.1 --- a/linld/stuff/src/MEMCPY32.ASM Sun Mar 14 19:55:20 2021 +0000 1.2 +++ b/linld/stuff/src/MEMCPY32.ASM Sun May 12 07:10:04 2024 +0100 1.3 @@ -2,7 +2,7 @@ 1.4 ;****** This file is distributed under GPL 1.5 ;*************************************************************** 1.6 ideal 1.7 - %PAGESIZE 1000 1.8 + %PAGESIZE 255 1.9 %crefref 1.10 %noincl 1.11 %nomacs 1.12 @@ -24,6 +24,12 @@ 1.13 ;3+ NOPs also work fine (chkd on 386) 1.14 endm 1.15 1.16 +macro addzx_e rm,i 1.17 + db 66h 1.18 + add rm,i 1.19 + dw 0 1.20 +endm 1.21 + 1.22 segment _TEXT byte public use16 'CODE' 1.23 1.24 ;*************************************************************** 1.25 @@ -41,18 +47,19 @@ 1.26 1.27 ;****** Init *************************************************** 1.28 1.29 + push bp 1.30 + mov bp,sp 1.31 + ;cld 1.32 + pushf 1.33 + push ds 1.34 + 1.35 ifndef NO386 1.36 1.37 - enter 0,0 1.38 - ;cld 1.39 - pushf 1.40 - push ds es 1.41 pushad ; struct declared in VCPI.ASM 1.42 mov cl,4 1.43 movzx esi,[srcseg] 1.44 shl esi,cl 1.45 add esi,[srcofs] 1.46 - mov [srcofs],esi ; for memcpy_vcpi 1.47 mov edi,[dstofs] 1.48 1.49 ifndef pm_only 1.50 @@ -60,9 +67,8 @@ 1.51 shr eax,cl 1.52 mov edx,edi 1.53 shr edx,cl 1.54 - mov ecx,esi 1.55 - or ecx,edi 1.56 - shr ecx,20 ; >1mb ? 1.57 + lea ecx,[eax+edx] 1.58 + shr ecx,16 ; >1mb ? 1.59 jnz @@pmcopy 1.60 @@movlp: 1.61 mov ds,ax 1.62 @@ -84,13 +90,8 @@ 1.63 @@pmcopy: 1.64 else 1.65 1.66 - push bp 1.67 - mov bp,sp 1.68 - ;cld 1.69 - pushf 1.70 - push ds es 1.71 push si 1.72 - xor bx,bx 1.73 + push di 1.74 xor si,si 1.75 mov ax,[srcseg] 1.76 extrn N_LXLSH@4:near 1.77 @@ -98,32 +99,31 @@ 1.78 add [word srcofs],ax 1.79 adc [word srcofs+2],dx 1.80 @@2flat: 1.81 - les ax,[dword si+srcofs] ; srcofs, dstofs 1.82 - mov dx,es 1.83 + les dx,[dword si+srcofs] ; srcofs, dstofs 1.84 + mov di,dx ; dstofs 1.85 + mov ax,es 1.86 mov cl,4 1.87 @@loop: 1.88 - shr dx,1 1.89 - rcr ax,1 1.90 + shr ax,1 ; high 1.91 + rcr dx,1 ; low 1.92 loop @@loop 1.93 - or bx,dx ; >=1mb flag 1.94 - push ax ; srcseg, dstseg 1.95 + push dx ; srcseg, dstseg 1.96 + xchg ax,bx ; save/restore high srcreg 1.97 xor si,-6 1.98 jnz @@2flat 1.99 + or bx,ax ; srcseg & dstseg < 1mb ? clear C 1.100 pop dx ; dstseg 1.101 pop ax ; srcseg 1.102 - cmp bx,si ; <1mb ? 1.103 - jne @@pmcopy 1.104 - push di 1.105 -@@movlp: 1.106 + jnz @@pmcopy 1.107 +@@movlp: ; bx=cx=0 1.108 mov ds,ax 1.109 mov es,dx 1.110 inc ax 1.111 inc dx 1.112 mov cl,0Fh 1.113 mov si,cx 1.114 - mov di,cx 1.115 + and di,cx 1.116 and si,[word srcofs] 1.117 - and di,[word dstofs] 1.118 inc cx 1.119 sub [word sz],cx 1.120 ;jae @@movpara 1.121 @@ -134,9 +134,10 @@ 1.122 @@movpara: 1.123 rep movsb 1.124 jae @@movlp 1.125 +@@pmcopy: 1.126 pop di 1.127 - jmp @@done16 1.128 -@@pmcopy: 1.129 + pop si 1.130 + jc @@done16 1.131 p386 1.132 pushad ; struct declared in VCPI.ASM 1.133 mov esi,[srcofs] 1.134 @@ -146,6 +147,7 @@ 1.135 1.136 mov ecx,[sz] 1.137 jecxz @@done 1.138 + cli 1.139 1.140 ifdef VCPI 1.141 smsw ax 1.142 @@ -158,11 +160,22 @@ 1.143 jmp @@done 1.144 endif 1.145 @@real_mode: 1.146 - cli 1.147 oldGDTR = (pword srcseg) ; don't need src seg/ofs anymore 1.148 sgdt [oldGDTR] 1.149 1.150 ;****** Load gdtr ********************************************** 1.151 + ifdef LARGE_ZIMAGE 1.152 + local rflags: word, rds: word, \ 1.153 + reax: dword, recx: dword, redx: dword, rebx: dword, \ 1.154 + resp: dword, rebp: dword, resi: dword, redi: dword, \ 1.155 + GDTR: pword = LOCAL_SIZE 1.156 + mov eax,cs 1.157 + shl eax,4 1.158 + addzx_e ax,<offset gdt_memcpy> 1.159 + push eax ; gdt_base_memcpy 1.160 + push -1 ; gdt_limit 1.161 + endif 1.162 + 1.163 lgdt [GDTR] 1.164 1.165 ;****** Go into pm ********************************************* 1.166 @@ -192,21 +205,16 @@ 1.167 lcr0 eax 1.168 ;****** Return ************************************************* 1.169 lgdt [oldGDTR] 1.170 + ifdef LARGE_ZIMAGE 1.171 + add sp,6 1.172 + endif 1.173 @@done: 1.174 popad 1.175 p8086 1.176 @@done16: 1.177 - ifdef NO386 1.178 - pop si 1.179 - endif 1.180 - pop es ds 1.181 + pop ds 1.182 popf ; restore I & D 1.183 - ifndef NO386 1.184 - p386 1.185 - leave 1.186 - else 1.187 pop bp 1.188 - endif 1.189 ret 14 1.190 1.191 ;****** Const data ********************************************* 1.192 @@ -224,16 +232,15 @@ 1.193 ; base_med P S D A G ??l_hi base_hi 1.194 ; Pl E W D 1.195 endif 1.196 + ifndef LARGE_ZIMAGE 1.197 label GDTR pword 1.198 gdt_limit dw 0ffffh 1.199 global gdt_base_memcpy:word 1.200 gdt_base_memcpy dw offset gdt_memcpy,0 1.201 + endif 1.202 1.203 endp memcpy32 1.204 1.205 - global movedend:near 1.206 -movedend: 1.207 - 1.208 ends _TEXT 1.209 1.210 end