[pypy-commit] pypy stmgc-c4: fix for ptr_eq because a function returning _Bool only sets the lower 8 bits of the return value
Raemi
noreply at buildbot.pypy.org
Mon Aug 19 14:50:43 CEST 2013
Author: Remi Meier <remi.meier at gmail.com>
Branch: stmgc-c4
Changeset: r66211:c2953cb28b82
Date: 2013-08-19 14:40 +0200
http://bitbucket.org/pypy/pypy/changeset/c2953cb28b82/
Log: fix for ptr_eq because a function returning _Bool only sets the
lower 8 bits of the return value
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
@@ -2337,8 +2337,9 @@
mc.CALL(imm(func))
# result still on stack
mc.POP_r(X86_64_SCRATCH_REG.value)
- # set flags:
- mc.TEST_rr(X86_64_SCRATCH_REG.value, X86_64_SCRATCH_REG.value)
+ # _Bool return type only sets lower 8 bits of return value
+ sl = X86_64_SCRATCH_REG.lowest8bits()
+ mc.CMP8_ri(sl.value, 0)
#
# END SLOWPATH
#
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