sanchayanmaity/gem5
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

X86: Fix the indexing for ah in byte division instructions.

Browse source
This commit is contained in:
Gabe Black 2009-08-05 03:03:41 -07:00
parent abe8fb3844
commit 664d50b439
1 changed files with 27 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

54
src/arch/x86/isa/insts/general_purpose/arithmetic/multiply_and_divide.py
View file

@ -229,7 +229,7 @@ def macroop IMUL_R_P_I
def macroop DIV_B_R
{
# Do the initial part of the division
div1 rsi, reg, dataSize=1
div1 ah, reg, dataSize=1
#These are split out so we can initialize the number of bits in the
#second register
@ -244,7 +244,7 @@ divLoopTop:
#Unload the answer
divq rax, dataSize=1
divr rsi, dataSize=1
divr ah, dataSize=1
};
def macroop DIV_B_M
@ -252,7 +252,7 @@ def macroop DIV_B_M
ld t2, seg, sib, disp
# Do the initial part of the division
div1 rsi, t2, dataSize=1
div1 ah, t2, dataSize=1
#These are split out so we can initialize the number of bits in the
#second register
@ -267,7 +267,7 @@ divLoopTop:
#Unload the answer
divq rax, dataSize=1
divr rsi, dataSize=1
divr ah, dataSize=1
};
def macroop DIV_B_P
@ -276,7 +276,7 @@ def macroop DIV_B_P
ld t2, seg, riprel, disp
# Do the initial part of the division
div1 rsi, t2, dataSize=1
div1 ah, t2, dataSize=1
#These are split out so we can initialize the number of bits in the
#second register
@ -291,7 +291,7 @@ divLoopTop:
#Unload the answer
divq rax, dataSize=1
divr rsi, dataSize=1
divr ah, dataSize=1
};
#
@ -384,7 +384,7 @@ def macroop IDIV_B_R
# Negate dividend
sub t1, t0, rax, flags=(ECF,), dataSize=1
ruflag t4, 3
sub t2, t0, rsi, dataSize=1
sub t2, t0, ah, dataSize=1
sub t2, t2, t4
#Find the sign of the divisor
@ -398,11 +398,11 @@ def macroop IDIV_B_R
#Find the sign of the dividend
#FIXME!!! This depends on shifts setting the carry flag correctly.
slli t0, rsi, 1, flags=(ECF,), dataSize=1
slli t0, ah, 1, flags=(ECF,), dataSize=1
# Put the dividend's absolute value into t1 and t2
mov t1, t1, rax, flags=(nCECF,), dataSize=1
mov t2, t2, rsi, flags=(nCECF,), dataSize=1
mov t2, t2, ah, flags=(nCECF,), dataSize=1
# Do the initial part of the division
div1 t2, t3, dataSize=1
@ -429,10 +429,10 @@ divLoopTop:
# Negate the remainder
sub t4, t0, t6, dataSize=1
# If the dividend was negitive, put the negated remainder in rsi.
mov rsi, rsi, t4, (CECF,), dataSize=1
# Otherwise put the regular remainder in rsi.
mov rsi, rsi, t6, (nCECF,), dataSize=1
# If the dividend was negitive, put the negated remainder in ah.
mov ah, ah, t4, (CECF,), dataSize=1
# Otherwise put the regular remainder in ah.
mov ah, ah, t6, (nCECF,), dataSize=1
# Negate the quotient.
sub t4, t0, t5, dataSize=1
@ -455,7 +455,7 @@ def macroop IDIV_B_M
# Negate dividend
sub t1, t0, rax, flags=(ECF,), dataSize=1
ruflag t4, 3
sub t2, t0, rsi, dataSize=1
sub t2, t0, ah, dataSize=1
sub t2, t2, t4
ld t3, seg, sib, disp
@ -471,11 +471,11 @@ def macroop IDIV_B_M
#Find the sign of the dividend
#FIXME!!! This depends on shifts setting the carry flag correctly.
slli t0, rsi, 1, flags=(ECF,), dataSize=1
slli t0, ah, 1, flags=(ECF,), dataSize=1
# Put the dividend's absolute value into t1 and t2
mov t1, t1, rax, flags=(nCECF,), dataSize=1
mov t2, t2, rsi, flags=(nCECF,), dataSize=1
mov t2, t2, ah, flags=(nCECF,), dataSize=1
# Do the initial part of the division
div1 t2, t3, dataSize=1
@ -502,10 +502,10 @@ divLoopTop:
# Negate the remainder
sub t4, t0, t6, dataSize=1
# If the dividend was negitive, put the negated remainder in rsi.
mov rsi, rsi, t4, (CECF,), dataSize=1
# Otherwise put the regular remainder in rsi.
mov rsi, rsi, t6, (nCECF,), dataSize=1
# If the dividend was negitive, put the negated remainder in ah.
mov ah, ah, t4, (CECF,), dataSize=1
# Otherwise put the regular remainder in ah.
mov ah, ah, t6, (nCECF,), dataSize=1
# Negate the quotient.
sub t4, t0, t5, dataSize=1
@ -528,7 +528,7 @@ def macroop IDIV_B_P
# Negate dividend
sub t1, t0, rax, flags=(ECF,), dataSize=1
ruflag t4, 3
sub t2, t0, rsi, dataSize=1
sub t2, t0, ah, dataSize=1
sub t2, t2, t4
rdip t7
@ -545,11 +545,11 @@ def macroop IDIV_B_P
#Find the sign of the dividend
#FIXME!!! This depends on shifts setting the carry flag correctly.
slli t0, rsi, 1, flags=(ECF,), dataSize=1
slli t0, ah, 1, flags=(ECF,), dataSize=1
# Put the dividend's absolute value into t1 and t2
mov t1, t1, rax, flags=(nCECF,), dataSize=1
mov t2, t2, rsi, flags=(nCECF,), dataSize=1
mov t2, t2, ah, flags=(nCECF,), dataSize=1
# Do the initial part of the division
div1 t2, t3, dataSize=1
@ -576,10 +576,10 @@ divLoopTop:
# Negate the remainder
sub t4, t0, t6, dataSize=1
# If the dividend was negitive, put the negated remainder in rsi.
mov rsi, rsi, t4, (CECF,), dataSize=1
# Otherwise put the regular remainder in rsi.
mov rsi, rsi, t6, (nCECF,), dataSize=1
# If the dividend was negitive, put the negated remainder in ah.
mov ah, ah, t4, (CECF,), dataSize=1
# Otherwise put the regular remainder in ah.
mov ah, ah, t6, (nCECF,), dataSize=1
# Negate the quotient.
sub t4, t0, t5, dataSize=1