Author: Armin Rigo <[email protected]>
Branch:
Changeset: r75315:6cebdb2f2659
Date: 2015-01-13 17:06 +0100
http://bitbucket.org/pypy/pypy/changeset/6cebdb2f2659/
Log: Fix the comments: nothing too special any more
diff --git a/rpython/jit/backend/x86/assembler.py
b/rpython/jit/backend/x86/assembler.py
--- a/rpython/jit/backend/x86/assembler.py
+++ b/rpython/jit/backend/x86/assembler.py
@@ -298,22 +298,14 @@
if slowpathaddr == 0 or not self.cpu.propagate_exception_descr:
return # no stack check (for tests, or non-translated)
#
- # make a "function" that is called immediately at the start of
- # an assembler function. In particular, the stack looks like:
- #
- # | ... | <-- aligned to a multiple of 16
- # | retaddr of caller |
- # | my own retaddr | <-- esp
- # +---------------------+
- #
+ # make a regular function that is called from a point near the start
+ # of an assembler function (after it adjusts the stack and saves
+ # registers).
mc = codebuf.MachineCodeBlockWrapper()
#
if IS_X86_64:
- # on the x86_64, we have to save all the registers that may
- # have been used to pass arguments. Note that we pass only
- # one argument, that is the frame
mc.MOV_rr(edi.value, esp.value)
- mc.SUB_ri(esp.value, WORD)
+ mc.SUB_ri(esp.value, WORD) # alignment
#
if IS_X86_32:
mc.SUB_ri(esp.value, 2*WORD) # alignment
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