changeset f7f0d361d6fc in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=f7f0d361d6fc
description:
X86: Fix the indexing for ah in byte division instructions.
diffstat:
1 file changed, 27 insertions(+), 27 deletions(-)
src/arch/x86/isa/insts/general_purpose/arithmetic/multiply_and_divide.py | 54
+++++-----
diffs (171 lines):
diff -r d959f578ae42 -r f7f0d361d6fc
src/arch/x86/isa/insts/general_purpose/arithmetic/multiply_and_divide.py
--- a/src/arch/x86/isa/insts/general_purpose/arithmetic/multiply_and_divide.py
Wed Aug 05 03:03:28 2009 -0700
+++ b/src/arch/x86/isa/insts/general_purpose/arithmetic/multiply_and_divide.py
Wed Aug 05 03:03:41 2009 -0700
@@ -229,7 +229,7 @@
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 @@
#Unload the answer
divq rax, dataSize=1
- divr rsi, dataSize=1
+ divr ah, dataSize=1
};
def macroop DIV_B_M
@@ -252,7 +252,7 @@
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 @@
#Unload the answer
divq rax, dataSize=1
- divr rsi, dataSize=1
+ divr ah, dataSize=1
};
def macroop DIV_B_P
@@ -276,7 +276,7 @@
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 @@
#Unload the answer
divq rax, dataSize=1
- divr rsi, dataSize=1
+ divr ah, dataSize=1
};
#
@@ -384,7 +384,7 @@
# 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 @@
#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 @@
# 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 @@
# 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 @@
#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 @@
# 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 @@
# 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 @@
#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 @@
# 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
_______________________________________________
m5-dev mailing list
[email protected]
http://m5sim.org/mailman/listinfo/m5-dev
