From dd8bfb911e89f3ad1da5cfa5618a8c52c62bb095 Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Wed, 11 Dec 2019 15:09:31 +0100 Subject: [PATCH 23/28] S390: Use convert-to-fixed instruction for llround functions. If compiled with z196 zarch support, the convert-to-fixed instruction is used to implement llround, llroundf, llroundl. Otherwise the common-code implementation is used. (cherry picked from commit 7d42d614fdc2c9d9f6ad46111bd6130501d50460) --- sysdeps/s390/fpu/s_llround.c | 42 ++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_llroundf.c | 42 ++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_llroundl.c | 43 +++++++++++++++++++++++++++++++++++ 3 files changed, 127 insertions(+) create mode 100644 sysdeps/s390/fpu/s_llround.c create mode 100644 sysdeps/s390/fpu/s_llroundf.c create mode 100644 sysdeps/s390/fpu/s_llroundl.c diff --git a/sysdeps/s390/fpu/s_llround.c b/sysdeps/s390/fpu/s_llround.c new file mode 100644 index 0000000000..f4a1b21637 --- /dev/null +++ b/sysdeps/s390/fpu/s_llround.c @@ -0,0 +1,42 @@ +/* llround() - S390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#if defined __s390x__ && defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +/* We only support s390x as on s390 a long long int refers to a register pair + of two 4byte registers instead of a 8byte register which is produced by the + instruction. + Note: On s390 this instruction would only be used if build with -mzarch. */ +# include +# include + +long long int +__llround (double x) +{ + long long int y; + /* The z196 zarch "convert to fixed" (cgdbra) instruction is rounding + x to the nearest integer with "ties away from 0" rounding mode + (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("cgdbra %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +libm_alias_double (__llround, llround) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_llroundf.c b/sysdeps/s390/fpu/s_llroundf.c new file mode 100644 index 0000000000..d202f4be8c --- /dev/null +++ b/sysdeps/s390/fpu/s_llroundf.c @@ -0,0 +1,42 @@ +/* llroundf() - S390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#if defined __s390x__ && defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +/* We only support s390x as on s390 a long long int refers to a register pair + of two 4byte registers instead of a 8byte register which is produced by the + instruction. + Note: On s390 this instruction would only be used if build with -mzarch. */ +# include +# include + +long long int +__llroundf (float x) +{ + long long int y; + /* The z196 zarch "convert to fixed" (cgebra) instruction is rounding + x to the nearest integer with "ties away from 0" rounding mode + (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("cgebra %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +libm_alias_float (__llround, llround) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_llroundl.c b/sysdeps/s390/fpu/s_llroundl.c new file mode 100644 index 0000000000..58976cd5c5 --- /dev/null +++ b/sysdeps/s390/fpu/s_llroundl.c @@ -0,0 +1,43 @@ +/* llroundl() - S390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#if defined __s390x__ && defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +/* We only support s390x as on s390 a long long int refers to a register pair + of two 4byte registers instead of a 8byte register which is produced by the + instruction. + Note: On s390 this instruction would only be used if build with -mzarch. */ +# include +# include +# include + +long long int +__llroundl (_Float128 x) +{ + long long int y; + /* The z196 zarch "convert to fixed" (cgxbra) instruction is rounding + x to the nearest integer with "ties away from 0" rounding mode + (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("cgxbra %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +libm_alias_ldouble (__llround, llround) + +#else +# include +#endif -- 2.18.2