x86/TCC: add `fchs`

3 files changed, 12 insertions, 1 deletions

diff --git a/miasm2/ir/translators/C.py b/miasm2/ir/translators/C.py
index b87c2656..96be6bd0 100644
--- a/miasm2/ir/translators/C.py
+++ b/miasm2/ir/translators/C.py
@@ -68,7 +68,7 @@ class TranslatorC(Translator):
                   expr.op.startswith("access_")    or
                   expr.op.startswith("load_")      or
                   expr.op in ["-", "ftan", "frndint", "f2xm1",
-                              "fsin", "fsqrt", "fabs", "fcos"]):
+                              "fsin", "fsqrt", "fabs", "fcos", "fchs"]):
                 return "%s(%s)" % (expr.op, self.from_expr(expr.args[0]))
             else:
                 raise NotImplementedError('Unknown op: %r' % expr.op)
diff --git a/miasm2/jitter/vm_mngr.c b/miasm2/jitter/vm_mngr.c
index bf1eb7df..d0171c17 100644
--- a/miasm2/jitter/vm_mngr.c
+++ b/miasm2/jitter/vm_mngr.c
@@ -1243,6 +1243,16 @@ double fabs(double a)
 	return b;
 }
 
+double fchs(double a)
+{
+	double b;
+	b = -a;
+#ifdef DEBUG_MIASM_DOUBLE
+	dump_float();
+	printf(" - %e -> %e\n", a, b);
+#endif
+	return b;
+}
 
 
 unsigned int fcom_c0(double a, double b)
diff --git a/miasm2/jitter/vm_mngr.h b/miasm2/jitter/vm_mngr.h
index c93ed583..dd0bad0f 100644
--- a/miasm2/jitter/vm_mngr.h
+++ b/miasm2/jitter/vm_mngr.h
@@ -370,6 +370,7 @@ double fscale(double a, double b);
 double f2xm1(double a);
 double fsqrt(double a);
 double fabs(double a);
+double fchs(double a);
 unsigned int fcom_c0(double a, double b);
 unsigned int fcom_c1(double a, double b);
 unsigned int fcom_c2(double a, double b);