summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorGabe Black <gblack@eecs.umich.edu>2007-07-20 14:59:14 -0700
committerGabe Black <gblack@eecs.umich.edu>2007-07-20 14:59:14 -0700
commitd926de462a6580b09a05d7a2fdf7eae699f51915 (patch)
tree77896744647183cc013745ba95a93ee0486eef43
parentec5f66190e7169acf76edd715ccda309806daf87 (diff)
downloadgem5-d926de462a6580b09a05d7a2fdf7eae699f51915.tar.xz
Implement the increment and decrement instructions, and the two operand form of signed multiplication.
--HG-- extra : convert_revision : d87df4b1b5470bed1d963dfe8e2ffa1403718342
-rw-r--r--src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py42
-rw-r--r--src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py26
2 files changed, 66 insertions, 2 deletions
diff --git a/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py b/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py
index c504d47ce..eed39c10c 100644
--- a/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py
+++ b/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py
@@ -53,7 +53,47 @@
#
# Authors: Gabe Black
-microcode = ""
+microcode = '''
+def macroop INC_R
+{
+ addi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+};
+
+def macroop INC_M
+{
+ ld t1, ds, [scale, index, base], disp
+ addi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
+ st t1, ds, [scale, index, base], disp
+};
+
+def macroop INC_P
+{
+ rdip t7
+ ld t1, ds, [0, t0, t7], disp
+ addi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+ st t1, ds, [0, t0, t7], disp
+};
+
+def macroop DEC_R
+{
+ subi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+};
+
+def macroop DEC_M
+{
+ ld t1, ds, [scale, index, base], disp
+ subi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
+ st t1, ds, [scale, index, base], disp
+};
+
+def macroop DEC_P
+{
+ rdip t7
+ ld t1, ds, [0, t0, t7], disp
+ subi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+ st t1, ds, [0, t0, t7], disp
+};
+'''
#let {{
# class DEC(Inst):
# "GenFault ${new UnimpInstFault}"
diff --git a/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py b/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py
index 662022e6a..8697bef65 100644
--- a/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py
+++ b/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py
@@ -53,7 +53,31 @@
#
# Authors: Gabe Black
-microcode = ""
+microcode = '''
+
+#
+# Two operand signed multiply. These should set the CF and OF flags if the
+# result is too large for the destination register
+#
+
+def macroop IMUL_R_R
+{
+ mul1s reg, reg, regm
+};
+
+def macroop IMUL_R_M
+{
+ ld t1, ds, [scale, index, base], disp
+ mul1s reg, reg, t1
+};
+
+def macroop IMUL_R_P
+{
+ rdip t7
+ ld t1, ds, [scale, index, base], disp
+ mul1s reg, reg, t1
+};
+'''
#let {{
# class MUL(Inst):
# "GenFault ${new UnimpInstFault}"