* [committed] i386: Fix <rounding_insn><mode>2 expander [PR95255]
@ 2020-05-22 16:05 Uros Bizjak
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From: Uros Bizjak @ 2020-05-22 16:05 UTC (permalink / raw)
To: gcc-patches
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2020-05-22 Uroš Bizjak <ubizjak@gmail.com>
gcc/ChangeLog:
PR target/95255
* config/i386/i386.md (<rounding_insn><mode>2): Do not try to
expand non-sse4 ROUND_ROUNDEVEN rounding via SSE support routines.
gcc/testsuite/ChangeLog:
PR target/95255
* gcc.target/i386/pr95255.c: New test.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Uros.
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diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index e81c737b7bc..459cf62b0de 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -17115,16 +17115,18 @@
&& (flag_fp_int_builtin_inexact || !flag_trapping_math))
|| (SSE_FLOAT_MODE_P (<MODE>mode) && TARGET_SSE_MATH
&& (TARGET_SSE4_1
- || (ROUND_<ROUNDING> != ROUND_ROUNDEVEN
- && (flag_fp_int_builtin_inexact || !flag_trapping_math))))"
+ || (ROUND_<ROUNDING> != ROUND_ROUNDEVEN
+ && (flag_fp_int_builtin_inexact || !flag_trapping_math))))"
{
if (SSE_FLOAT_MODE_P (<MODE>mode) && TARGET_SSE_MATH
- && (TARGET_SSE4_1 || flag_fp_int_builtin_inexact || !flag_trapping_math))
+ && (TARGET_SSE4_1
+ || (ROUND_<ROUNDING> != ROUND_ROUNDEVEN
+ && (flag_fp_int_builtin_inexact || !flag_trapping_math))))
{
if (TARGET_SSE4_1)
emit_insn (gen_sse4_1_round<mode>2
- (operands[0], operands[1], GEN_INT (ROUND_<ROUNDING>
- | ROUND_NO_EXC)));
+ (operands[0], operands[1],
+ GEN_INT (ROUND_<ROUNDING> | ROUND_NO_EXC)));
else if (TARGET_64BIT || (<MODE>mode != DFmode))
{
if (ROUND_<ROUNDING> == ROUND_FLOOR)
diff --git a/gcc/testsuite/gcc.target/i386/pr95255.c b/gcc/testsuite/gcc.target/i386/pr95255.c
new file mode 100644
index 00000000000..5b731941f72
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr95255.c
@@ -0,0 +1,8 @@
+/* PR target/95255 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse2 -mno-sse4.1 -mfpmath=both" } */
+
+double foo (double x)
+{
+ return __builtin_roundeven (x);
+}
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2020-05-22 16:05 [committed] i386: Fix <rounding_insn><mode>2 expander [PR95255] Uros Bizjak
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