Changeset 89149 in vbox

Timestamp:

May 19, 2021 12:52:59 AM (4 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

144490

Message:

IPRT,bs3kit: Added ASMMultU64ByU32DivByU32 to bs3kit. bugref:10009

Location:

trunk

Files:

• include/iprt/mangling.h (modified) (1 diff)
• src/VBox/Runtime/common/asm/ASMMultU64ByU32DivByU32.asm (modified) (4 diffs)
• src/VBox/ValidationKit/bootsectors/bs3kit/Makefile.kmk (modified) (1 diff)

trunk/include/iprt/mangling.h

@@ -283 +283 @@
 # define ASMMemZeroPage                                 RT_MANGLER(ASMMemZeroPage)
 # define ASMMemZeroPage_EndProc                         RT_MANGLER(ASMMemZeroPage_EndProc)
+# define ASMMultU64ByU32DivByU32                        RT_MANGLER(ASMMultU64ByU32DivByU32)
+# define ASMMultU64ByU32DivByU32_EndProc                RT_MANGLER(ASMMultU64ByU32DivByU32_EndProc)
 # define ASMNopPause                                    RT_MANGLER(ASMNopPause)
 # define ASMNopPause_EndProc                            RT_MANGLER(ASMNopPause_EndProc)

trunk/src/VBox/Runtime/common/asm/ASMMultU64ByU32DivByU32.asm

@@ -40 +40 @@
 ;
 BEGINPROC_EXPORTED ASMMultU64ByU32DivByU32
-%ifdef RT_ARCH_AMD64
+%if ARCH_BITS == 64
 
  %ifdef ASM_CALL64_MSC
@@ -54 +54 @@
     div     r8
 
-%else ; X86
+%else ; 16 or 32 bit
     ;
     ; This implementation is converted from the GCC inline
@@ -60 +60 @@
     ; performance wise.
     ;
+ %if ARCH_BITS == 16
+    push    bp
+    mov     bp, sp
+    push    eax                         ; push all return registers to preserve high value (paranoia)
+    push    ebx
+    push    ecx
+    push    edx
+ %endif
     push    esi
     push    edi
 
-%define u64A_Lo     [esp + 04h + 08h]
-%define u64A_Hi     [esp + 08h + 08h]
-%define u32B        [esp + 0ch + 08h]
-%define u32C        [esp + 10h + 08h]
+ %if ARCH_BITS == 16
+  %define u64A_Lo     [bp + 4 + 04h]
+  %define u64A_Hi     [bp + 4 + 08h]
+  %define u32B        [bp + 4 + 0ch]
+  %define u32C        [bp + 4 + 10h]
+ %else
+  %define u64A_Lo     [esp + 04h + 08h]
+  %define u64A_Hi     [esp + 08h + 08h]
+  %define u32B        [esp + 0ch + 08h]
+  %define u32C        [esp + 10h + 08h]
+ %endif
 
     ; Load parameters into registers.
@@ -97 +112 @@
     pop     edi
     pop     esi
+ %if ARCH_BITS == 16
+    ;  DX:CX:BX:AX, where DX holds bits 15:0, CX bits 31:16, BX bits 47:32, and AX bits 63:48.
+    mov     ax, [bp - 4*4]              ; dx = bits 15:0
+    shr     eax, 16
+    mov     ax, [bp - 3*4]              ; cx = bits 31:16
+    mov     dx, [bp - 2*4]              ; bx = bits 47:32
+    shr     edx, 16
+    mov     dx, [bp - 1*4]              ; ax = bits 63:48
+    pop     edx
+    pop     ecx
+    pop     ebx
+    pop     eax
+    leave
+ %endif
 %endif
     ret

trunk/src/VBox/ValidationKit/bootsectors/bs3kit/Makefile.kmk

@@ -238 +238 @@
        ../../../Runtime/common/asm/ASMSetFlags.asm \
        ../../../Runtime/common/asm/ASMGetFlags.asm \
+       ../../../Runtime/common/asm/ASMMultU64ByU32DivByU32.asm \
 
 # The 16-bit BS3Kit library.