===================================================================
@@ -47827,8 +47827,7 @@ void ix86_emit_swdivsf (rtx res, rtx a, rtx b, mac
/* Output code to perform a Newton-Rhapson approximation of a
single precision floating point [reciprocal] square root. */
-void ix86_emit_swsqrtsf (rtx res, rtx a, machine_mode mode,
- bool recip)
+void ix86_emit_swsqrtsf (rtx res, rtx a, machine_mode mode, bool recip)
{
rtx x0, e0, e1, e2, e3, mthree, mhalf;
REAL_VALUE_TYPE r;
@@ -47868,13 +47867,9 @@ void ix86_emit_swdivsf (rtx res, rtx a, rtx b, mac
/* If (a == 0.0) Filter out infinity to prevent NaN for sqrt(0.0). */
if (!recip)
{
- rtx zero, mask;
+ rtx zero = force_reg (mode, CONST0_RTX(mode));
+ rtx mask;
- zero = gen_reg_rtx (mode);
- mask = gen_reg_rtx (mode);
-
- zero = force_reg (mode, CONST0_RTX(mode));
-
/* Handle masked compare. */
if (VECTOR_MODE_P (mode) && GET_MODE_SIZE (mode) == 64)
{
@@ -47885,8 +47880,8 @@ void ix86_emit_swdivsf (rtx res, rtx a, rtx b, mac
}
else
{
+ mask = gen_reg_rtx (mode);
emit_insn (gen_rtx_SET (mask, gen_rtx_NE (mode, zero, a)));
-
emit_insn (gen_rtx_SET (x0, gen_rtx_AND (mode, x0, mask)));
}
}
No functional changes. 2015-12-08 Uros Bizjak <ubizjak@gmail.com> * config/i386/i386.c (ix86_emit_swsqrtsf): Cleanup infinity filterning code. Bootstrapped and regression tested on x86_64-linux-gnu, committed to mainline SVN. Uros.