No functional changes. 2015-12-08 Uros Bizjak <ubiz...@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.
Index: config/i386/i386.c =================================================================== --- config/i386/i386.c (revision 231355) +++ config/i386/i386.c (working copy) @@ -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))); } }