Author: hager <sven.ha...@uni-duesseldorf.de>
Branch: ppc-jit-backend
Changeset: r50764:c6c19fd92a42
Date: 2011-12-20 17:28 +0100
http://bitbucket.org/pypy/pypy/changeset/c6c19fd92a42/
Log: making jump conditions more clear
diff --git a/pypy/jit/backend/ppc/ppcgen/codebuilder.py
b/pypy/jit/backend/ppc/ppcgen/codebuilder.py
--- a/pypy/jit/backend/ppc/ppcgen/codebuilder.py
+++ b/pypy/jit/backend/ppc/ppcgen/codebuilder.py
@@ -1003,16 +1003,21 @@
self.b(target_ofs)
def b_cond_offset(self, offset, condition):
+ BI = condition[0]
+ BO = condition[1]
+
pos = self.currpos()
target_ofs = offset - pos
- self.bc(condition, 2, target_ofs)
+ self.bc(BO, BI, target_ofs)
def b_cond_abs(self, addr, condition):
- assert condition in (c.EQ, c.NE)
+ BI = condition[0]
+ BO = condition[1]
+
self.alloc_scratch_reg(addr)
self.mtctr(r.SCRATCH.value)
self.free_scratch_reg()
- self.bcctr(condition, 2)
+ self.bcctr(BO, BI)
def b_abs(self, address, trap=False):
self.alloc_scratch_reg(address)
diff --git a/pypy/jit/backend/ppc/ppcgen/condition.py
b/pypy/jit/backend/ppc/ppcgen/condition.py
--- a/pypy/jit/backend/ppc/ppcgen/condition.py
+++ b/pypy/jit/backend/ppc/ppcgen/condition.py
@@ -1,9 +1,16 @@
-LE = 0
-NE = 4
-GT = 2
-LT = 3
-EQ = 12
-GE = 33
+# CONDITION = (BI (number of bit tested in CR), BO (12 if bit is 1, else 4))
+
+SET = 12
+UNSET = 4
+
+LE = (1, UNSET)
+NE = (2, UNSET)
+GT = (1, SET)
+LT = (0, SET)
+EQ = (2, SET)
+GE = (0, UNSET)
+
+# values below are random ...
U_LT = 50
U_LE = 60
@@ -12,5 +19,3 @@
IS_TRUE = 90
IS_ZERO = 100
-
-opposites = {LE: GT, NE: EQ, LT: GE, GE: LT, EQ: NE, GT: LE}
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