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dbgbrk32.asm
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dbgbrk32.asm
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; '$Header: P:/PVCS/MAX/STATUTIL/DBGBRK.ASV 1.0 25 Sep 1996 10:14:50 BOB $
TITLE DBGBRK.ASM
CPUFLAGS record $ID:1,$VIP:1,$VIF:1,$ACHI:1,$VMHI:1,$RFHI:1, \
$R0:1,$NT:1,$IOPL:2,$OF:1,$DF:1,$IF:1,$TF:1,$SF:1,$ZF:1,$R1:1,$AF:1,$R2:1,$PF:1,$R3:1,$CF:1
.386
.model FLAT,C
.code
OPTION READONLY
OPTION OLDSTRUCTS
NDPSW record $BUSY:1,$C3:1,$ST0:1,$ST1:1,$ST2:1,$C2:1,$C1:1,$C0:1,$IR:1, \
$XRSV2:1,$XFPRC:1,$XFUNF:1,$XFOVF:1,$XFZDV:1,$XFDOP:1,$XFIOP:1
public iAsmAdd64
iAsmAdd64 proc ; Start iAsmAdd64 procedure
COMMENT|
Add two signed 64-bit numbers,
handling overflow.
On entry:
Stack as per ADD64_STR
On exit:
EAX = 1 if successful
= 0 if not
|
ADD64_STR struct
dd ? ; Caller's EBP
dd ? ; Caller's return EIP
ADD64_RES dd ? ; Ptr to result
ADD64_LFT dq ? ; Left arg
ADD64_RHT dq ? ; Right arg
ADD64_STR ends
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
push ebx ; Save register
finit ; Initialize the FPU
fild [ebp].ADD64_LFT ; Load the left arg
fild [ebp].ADD64_RHT ; ... right ...
faddp st(1),st(0) ; Add 'em
fstsw ax ; Save the FPU Status Word from the FADDP
mov ebx,[ebp].ADD64_RES ; EBX => result
fistp qword ptr [ebx] ; Save in result
mov ebx,eax ; Copy the FSTSW word from the FADDP
fstsw ax ; Save the FPU Status Word from the FISTP
or eax,ebx ; Merge the two FSTSW flags
test eax,(mask $XFPRC) OR (mask $XFOVF) OR (mask $XFIOP) ; Test the Precision Exception, Overflow, and Invalid Operation flags
mov eax,0 ; Clear the result
setz al ; Return 0 or 1 from the <add>
pop ebx ; Restore register
pop ebp ; Restore
ret ; Return to caller
iAsmAdd64 endp ; End iAsmAdd64 procedure
public iAsmSub64
iAsmSub64 proc ; Start iAsmSub64 procedure
COMMENT|
Subtract two signed 64-bit numbers,
handling overflow.
On entry:
Stack as per SUB64_STR
On exit:
EAX = 1 if successful
= 0 if not
|
SUB64_STR struct
dd ? ; Caller's EBP
dd ? ; Caller's return EIP
SUB64_RES dd ? ; Ptr to result
SUB64_LFT dq ? ; Left arg
SUB64_RHT dq ? ; Right arg
SUB64_STR ends
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
push ebx ; Save register
finit ; Initialize the FPU
fild [ebp].SUB64_LFT ; Load the left arg
fild [ebp].SUB64_RHT ; ... right ...
fsubp st(1),st(0) ; Subtract 'em
fstsw ax ; Save the FPU Status Word from the FSUBP
mov ebx,[ebp].SUB64_RES ; EBX => result
fistp qword ptr [ebx] ; Save in result
mov ebx,eax ; Copy the FSTSW word from the FSUBP
fstsw ax ; Save the FPU Status Word from the FISTP
or eax,ebx ; Merge the two FSTSW flags
test eax,(mask $XFPRC) OR (mask $XFOVF) OR (mask $XFIOP) ; Test the Precision Exception, Overflow, and Invalid Operation flags
mov eax,0 ; Clear the result
setz al ; Return 0 or 1 from the <add>
pop ebx ; Restore register
pop ebp ; Restore
ret ; Return to caller
iAsmSub64 endp ; End iAsmSub64 procedure
public iAsmMul64
iAsmMul64 proc ; Start iAsmMul64 procedure
COMMENT|
Multiply two signed 64-bit numbers,
handling overflow.
On entry:
Stack as per MUL64_STR
On exit:
EAX = 1 if successful
= 0 if not
|
MUL64_STR struct
dd ? ; Caller's EBP
dd ? ; Caller's return EIP
MUL64_RES dd ? ; Ptr to result
MUL64_LFT dq ? ; Left arg
MUL64_RHT dq ? ; Right arg
MUL64_STR ends
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
push ebx ; Save register
finit ; Initialize the FPU
fild [ebp].MUL64_LFT ; Load the left arg
fild [ebp].MUL64_RHT ; ... right ...
fmulp st(1),st(0) ; Multiply 'em
fstsw ax ; Save the FPU Status Word from the FMULP
mov ebx,[ebp].MUL64_RES ; EBX => result
fistp qword ptr [ebx] ; Save in result
mov ebx,eax ; Copy the FSTSW word from the FMULP
fstsw ax ; Save the FPU Status Word from the FISTP
or eax,ebx ; Merge the two FSTSW flags
test eax,(mask $XFPRC) OR (mask $XFOVF) OR (mask $XFIOP) ; Test the Precision Exception, Overflow, and Invalid Operation flags
mov eax,0 ; Clear the result
setz al ; Return 0 or 1 from the <mul>
pop ebx ; Restore register
pop ebp ; Restore register
ret ; Return to caller
iAsmMul64 endp ; End iAsmMul64 procedure
public iAsmMulPiInt
iAsmMulPiInt proc ; Start iAsmMulPiInt procedure
COMMENT|
Multiply a signed 64-bit number by Pi.
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
MULPI_STR struct
dd ? ; Caller's EBP
dd ? ; Caller's return EIP
MULPI_RES dd ? ; Ptr to result
MULPI_RHT dd ? ; Ptr to right arg
MULPI_STR ends
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
fldpi ; Load Pi
mov eax,[ebp].MULPI_RHT ; EAX => integer right arg
fild qword ptr [eax] ; Load the integer right arg
fmulp st(1),st(0) ; Multiply 'em
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmMulPiInt endp ; End iAsmMulPiInt procedure
public iAsmMulPiFlt
iAsmMulPiFlt proc ; Start iAsmMulPiFlt procedure
COMMENT|
Multiply a signed 64-bit number by Pi.
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
fldpi ; Load Pi
mov eax,[ebp].MULPI_RHT ; EAX => float right arg
fld qword ptr [eax] ; Load the float right arg
fmulp st(1),st(0) ; Multiply 'em
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmMulPiFlt endp ; End iAsmMulPiFlt procedure
public iAsmCircle4Int
iAsmCircle4Int proc ; Start iAsmCircle4Int procedure
COMMENT|
Compute (1 + R * 2) * 0.5
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => integer right arg
fild qword ptr [eax] ; Load the integer right arg
fld st(0) ; R R
fmulp st(1),st(0) ; R*R
fld1 ; 1 R*R
faddp st(1),st(0) ; 1+R*R
fsqrt ; (1+R*R)*0.5
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle4Int endp ; End iAsmCircle4Int procedure
public iAsmCircle4Flt
iAsmCircle4Flt proc ; Start iAsmCircle4Flt procedure
COMMENT|
Compute (1 + R * 2) * 0.5
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => float right arg
fld qword ptr [eax] ; Load the float right arg
fld st(0) ; R R
fmulp st(1),st(0) ; R*R
fld1 ; 1 R*R
faddp st(1),st(0) ; 1+R*R
fsqrt ; (1+R*R)*0.5
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle4Flt endp ; End iAsmCircle4Flt procedure
public iAsmCircle3Int
iAsmCircle3Int proc ; Start iAsmCircle3Int procedure
COMMENT|
Compute tan(R)
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => integer right arg
fild qword ptr [eax] ; Load the integer right arg
fsincos ; cos(R) sin(R)
fdivp st(1),st(0) ; tan(R)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle3Int endp ; End iAsmCircle3Int procedure
public iAsmCircle3Flt
iAsmCircle3Flt proc ; Start iAsmCircle3Flt procedure
COMMENT|
Compute tan(R)
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => float right arg
fld qword ptr [eax] ; Load the float right arg
fsincos ; cos(R) sin(R)
fdivp st(1),st(0) ; tan(R)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle3Flt endp ; End iAsmCircle3Flt procedure
public iAsmCircle2Int
iAsmCircle2Int proc ; Start iAsmCircle2Int procedure
COMMENT|
Compute cos(R)
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => integer right arg
fild qword ptr [eax] ; Load the integer right arg
fcos ; cos(R)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle2Int endp ; End iAsmCircle2Int procedure
public iAsmCircle2Flt
iAsmCircle2Flt proc ; Start iAsmCircle2Flt procedure
COMMENT|
Compute cos(R)
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => float right arg
fld qword ptr [eax] ; Load the float right arg
fcos ; cos(R)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle2Flt endp ; End iAsmCircle2Flt procedure
public iAsmCircle1Int
iAsmCircle1Int proc ; Start iAsmCircle1Int procedure
COMMENT|
Compute sin(R)
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => integer right arg
fild qword ptr [eax] ; Load the integer right arg
fsin ; sin(R)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle1Int endp ; End iAsmCircle1Int procedure
public iAsmCircle1Flt
iAsmCircle1Flt proc ; Start iAsmCircle1Flt procedure
COMMENT|
Compute sin(R)
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => float right arg
fld qword ptr [eax] ; Load the float right arg
fsin ; sin(R)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle1Flt endp ; End iAsmCircle1Flt procedure
public iAsmCircle0Int
iAsmCircle0Int proc ; Start iAsmCircle0Int procedure
COMMENT|
Compute (1 - R * 2) * 0.5
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => integer right arg
fild qword ptr [eax] ; Load the integer right arg
fld st(0) ; R R
fmulp st(1),st(0) ; R*R
fchs ; -R*R
fld1 ; 1 -R*R
faddp st(1),st(0) ; 1-R*R
fsqrt ; (1-R*R)*0.5
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle0Int endp ; End iAsmCircle0Int procedure
public iAsmCircle0Flt
iAsmCircle0Flt proc ; Start iAsmCircle0Flt procedure
COMMENT|
Compute (1 - R * 2) * 0.5
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => float right arg
fld qword ptr [eax] ; Load the float right arg
fld st(0) ; R R
fmulp st(1),st(0) ; R*R
fchs ; -R*R
fld1 ; 1 -R*R
faddp st(1),st(0) ; 1-R*R
fsqrt ; (1-R*R)*0.5
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircle0Flt endp ; End iAsmCircle0Flt procedure
public iAsmCircleN4Int
iAsmCircleN4Int proc ; Start iAsmCircleN4Int procedure
COMMENT|
Compute (R + 1) × sqrt ((R - 1) / (R + 1))
a.k.a. ((-1) + R * 2) * 0.5
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => integer right arg
fild qword ptr [eax] ; Load the integer right arg
fld st(0) ; R R
fld1 ; 1 R R
faddp st(1),st(0) ; R+1 R
fld1 ; 1 R+1 R
fsubp st(2),st(0) ; R-1 R+1
fld st(1) ; R+1 R-1 R+1
fdivp st(1),st(0) ; (R-1)/(R+1) R+1
fsqrt ; sqrt(...) R+1
fmulp st(1),st(0) ; sqrt(...) * (R+1)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircleN4Int endp ; End iAsmCircleN4Int procedure
public iAsmCircleN4Flt
iAsmCircleN4Flt proc ; Start iAsmCircleN4Flt procedure
COMMENT|
Compute (R + 1) × sqrt ((R - 1) / (R + 1))
a.k.a. ((-1) + R * 2) * 0.5
On entry:
Stack as per MULPI_STR
On exit:
EAX = clobbered
|
push ebp ; Prepare to address the stack
mov ebp,esp ; Hello, Mr. Stack
finit ; Initialize the FPU
mov eax,[ebp].MULPI_RHT ; EAX => float right arg
fld qword ptr [eax] ; Load the float right arg
fld st(0) ; R R
fld1 ; 1 R R
faddp st(1),st(0) ; R+1 R
fld1 ; 1 R+1 R
fsubp st(2),st(0) ; R-1 R+1
fld st(1) ; R+1 R-1 R+1
fdivp st(1),st(0) ; (R-1)/(R+1) R+1
fsqrt ; sqrt(...) R+1
fmulp st(1),st(0) ; sqrt(...) * (R+1)
mov eax,[ebp].MUL64_RES ; EAX => result
fstp qword ptr [eax] ; Save in result
pop ebp ; Restore
ret ; Return to caller
iAsmCircleN4Flt endp ; End iAsmCircleN4Flt procedure
end