From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1005) id A62A23858C52; Fri, 9 Sep 2022 18:07:06 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A62A23858C52 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1662746826; bh=ir4LtKcTaGsZA5otxr2+1sV76GZg3y79nnTs68s8uvM=; h=From:To:Subject:Date:From; b=kH78CuD/7SHMBqATg3yjIyCEFWQ7QHxDgAQuygTVGh3b80e03TLPpc+s/MXSx6Wg5 O3TUHEpeN3MfpyF1KfD3+jW6xRPK8wvKmCE3MBBMgI3FtXzriJJUGOLnzxI+ak8oiB +sVHgLwzrddcHDv56OPFjx8jcHbslf6gsnQmvzlk= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Michael Meissner To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/meissner/heads/work100)] Allow __ibm128 even if IEEE 128-bit floating point is not supported. X-Act-Checkin: gcc X-Git-Author: Michael Meissner X-Git-Refname: refs/users/meissner/heads/work100 X-Git-Oldrev: bbf978de4f7e51957d83fb0a537e4228c2c479d0 X-Git-Newrev: d1c714cf35ee974e3dc02e93fc7f761b29a89660 Message-Id: <20220909180706.A62A23858C52@sourceware.org> Date: Fri, 9 Sep 2022 18:07:06 +0000 (GMT) List-Id: https://gcc.gnu.org/g:d1c714cf35ee974e3dc02e93fc7f761b29a89660 commit d1c714cf35ee974e3dc02e93fc7f761b29a89660 Author: Michael Meissner Date: Fri Sep 9 14:04:37 2022 -0400 Allow __ibm128 even if IEEE 128-bit floating point is not supported. This patch allows the use of the __ibm128 keyword on non-VSX systems. Originally, the __ibm128 keyword was only enabled when the IEEE 128-bit floating point is enabled. Sometime back in the GCC 12 development period, Segher asked that the __ibm128 keyword be allowed in older systems that don't support IEEE 128-bit. But at the time, stage 1 had closed for GCC 12, so I deferred doing this change until GCC 13. This patch allows __ibm128 to be used if either IEEE 128-bit is enabled or long double used the IBM 128-bit format. 2022-09-09 Michael Meissner gcc/ * config/rs6000/rs6000-builtins.cc (rs6000_init_builtins): Enable using the__ibm128 keyword on systems that either use the 128-bit IBM long double format for long double or support IEEE 128-bit. * config/rs6000/rs6000.cc (rs6000_init_libfuncs): Create IBM 128-bit floating point support functions on systems that support the __ibm128 keyword. (rs6000_scalar_mode_supported_p): Likewise. * config/rs6000/rs6000.h (TARGET_IBM128): New macro. * config/rs6000/rs6000.md (@extenddf2_fprs): Allow IFmode to be converted even if long double is not 128-bits. (extenddf2_vsx): Likewise. (extendiftf2):Allow conversion on systems that support the __ibm128 keyword. (extendtfif2): Likewise. (trunciftf2): Likewise. (trunctfif2): Likewise. Diff: --- gcc/config/rs6000/rs6000-builtin.cc | 2 +- gcc/config/rs6000/rs6000.cc | 13 ++++++++----- gcc/config/rs6000/rs6000.h | 6 ++++++ gcc/config/rs6000/rs6000.md | 9 ++++----- 4 files changed, 19 insertions(+), 11 deletions(-) diff --git a/gcc/config/rs6000/rs6000-builtin.cc b/gcc/config/rs6000/rs6000-builtin.cc index 6dfb0db43d6..3cac205ddcd 100644 --- a/gcc/config/rs6000/rs6000-builtin.cc +++ b/gcc/config/rs6000/rs6000-builtin.cc @@ -710,7 +710,7 @@ rs6000_init_builtins (void) For IEEE 128-bit floating point, always create the type __ieee128. If the user used -mfloat128, rs6000-c.cc will create a define from __float128 to __ieee128. */ - if (TARGET_LONG_DOUBLE_128 && (!TARGET_IEEEQUAD || TARGET_FLOAT128_TYPE)) + if (TARGET_IBM128) { if (!TARGET_IEEEQUAD) ibm128_float_type_node = long_double_type_node; diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index 6f822434ab0..00fe4c6ab28 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -11112,10 +11112,11 @@ rs6000_init_libfuncs (void) { /* __float128 support. */ if (TARGET_FLOAT128_TYPE) - { - init_float128_ibm (IFmode); - init_float128_ieee (KFmode); - } + init_float128_ieee (KFmode); + + /* __ibm128 support. */ + if (TARGET_IBM128) + init_float128_ibm (IFmode); /* AIX/Darwin/64-bit Linux quad floating point routines. */ if (TARGET_LONG_DOUBLE_128) @@ -23757,7 +23758,9 @@ rs6000_scalar_mode_supported_p (scalar_mode mode) if (DECIMAL_FLOAT_MODE_P (mode)) return default_decimal_float_supported_p (); - else if (TARGET_FLOAT128_TYPE && (mode == KFmode || mode == IFmode)) + else if (TARGET_FLOAT128_TYPE && mode == KFmode) + return true; + else if (TARGET_IBM128 && mode == IFmode) return true; else return default_scalar_mode_supported_p (mode); diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h index eb7b2158497..ee14aa974c1 100644 --- a/gcc/config/rs6000/rs6000.h +++ b/gcc/config/rs6000/rs6000.h @@ -564,6 +564,12 @@ extern int rs6000_vector_align[]; && TARGET_P8_VECTOR \ && TARGET_POWERPC64) +/* Whether the __ibm128 keyword is allowed. Any system that supports _Float128 + is assumed to be capable of supporting __ibm128. Similarly if the long + double size is 128 bits, we assume __ibm128 is supported. We don't want to + support it on a system without existing 128-bit long doubles. */ +#define TARGET_IBM128 (TARGET_FLOAT128_TYPE || TARGET_LONG_DOUBLE_128) + /* Inlining allows targets to define the meanings of bits in target_info field of ipa_fn_summary by itself, the used bits for rs6000 are listed below. */ diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index 838d38616b7..e86ddcf95a2 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -8622,8 +8622,7 @@ (float_extend:IBM128 (match_operand:DF 1 "nonimmediate_operand" "d,m,d"))) (use (match_operand:DF 2 "nonimmediate_operand" "m,m,d"))] - "!TARGET_VSX && TARGET_HARD_FLOAT - && TARGET_LONG_DOUBLE_128 && FLOAT128_IBM_P (mode)" + "!TARGET_VSX && TARGET_HARD_FLOAT && FLOAT128_IBM_P (mode)" "#" "&& reload_completed" [(set (match_dup 3) (match_dup 1)) @@ -8640,7 +8639,7 @@ [(set (match_operand:IBM128 0 "gpc_reg_operand" "=d,d") (float_extend:IBM128 (match_operand:DF 1 "nonimmediate_operand" "wa,m")))] - "TARGET_LONG_DOUBLE_128 && TARGET_VSX && FLOAT128_IBM_P (mode)" + "TARGET_VSX && FLOAT128_IBM_P (mode)" "#" "&& reload_completed" [(set (match_dup 2) (match_dup 1)) @@ -9126,7 +9125,7 @@ (define_insn_and_split "extendtfif2" [(set (match_operand:IF 0 "gpc_reg_operand" "=wa,wa,r,r") (float_extend:IF (match_operand:TF 1 "gpc_reg_operand" "0,wa,0,r")))] - "TARGET_HARD_FLOAT && FLOAT128_IBM_P (TFmode)" + "TARGET_HARD_FLOAT && TARGET_IBM128 && FLOAT128_IBM_P (TFmode)" "#" "&& reload_completed" [(set (match_dup 0) @@ -9140,7 +9139,7 @@ (define_insn_and_split "extendiftf2" [(set (match_operand:TF 0 "gpc_reg_operand" "=wa,wa,r,r") (float_extend:TF (match_operand:IF 1 "gpc_reg_operand" "0,wa,0,r")))] - "TARGET_HARD_FLOAT && FLOAT128_IBM_P (TFmode)" + "TARGET_HARD_FLOAT && TARGET_IBM128 && FLOAT128_IBM_P (TFmode)" "#" "&& reload_completed" [(set (match_dup 0)