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author | Jiawei <jiawei@iscas.ac.cn> | 2022-10-20 17:32:34 +0800 |
---|---|---|
committer | Kito Cheng <kito.cheng@sifive.com> | 2022-10-27 11:17:32 +0800 |
commit | 6b252dc96b52f5ab6f399c3f6b0c0b6614a36913 (patch) | |
tree | e043c93c86e95f1dd20588ef8838e6269cb427f1 /gcc/config/riscv | |
parent | ac96e9068ce7dcaca992fde7f1551ffe8837b723 (diff) | |
download | gcc-6b252dc96b52f5ab6f399c3f6b0c0b6614a36913.zip gcc-6b252dc96b52f5ab6f399c3f6b0c0b6614a36913.tar.gz gcc-6b252dc96b52f5ab6f399c3f6b0c0b6614a36913.tar.bz2 |
RISC-V: Limit regs use for z*inx extension.
Limit z*inx abi support with 'ilp32','ilp32e','lp64' only.
Use GPR instead FPR when 'zfinx' enable, Only use even registers
in RV32 when 'zdinx' enable.
Enable FLOAT16 when Zhinx/Zhinxmin enabled.
Co-Authored-By: Sinan Lin <sinan@isrc.iscas.ac.cn>
gcc/ChangeLog:
* config/riscv/constraints.md (TARGET_ZFINX ? GR_REGS): Set GPRS
use while Zfinx is enable.
* config/riscv/riscv.cc (riscv_hard_regno_mode_ok): Limit odd
registers use when Zdinx enable in RV32 cases.
(riscv_option_override): New target enable MASK_FDIV.
(riscv_libgcc_floating_mode_supported_p): New error info when
use incompatible arch&abi.
(riscv_excess_precision): New target enable FLOAT16.
Diffstat (limited to 'gcc/config/riscv')
-rw-r--r-- | gcc/config/riscv/constraints.md | 5 | ||||
-rw-r--r-- | gcc/config/riscv/riscv.cc | 21 |
2 files changed, 20 insertions, 6 deletions
diff --git a/gcc/config/riscv/constraints.md b/gcc/config/riscv/constraints.md index 951dcc5..4088c48 100644 --- a/gcc/config/riscv/constraints.md +++ b/gcc/config/riscv/constraints.md @@ -21,8 +21,9 @@ ;; Register constraints -(define_register_constraint "f" "TARGET_HARD_FLOAT ? FP_REGS : NO_REGS" - "A floating-point register (if available).") +(define_register_constraint "f" "TARGET_HARD_FLOAT ? FP_REGS : + (TARGET_ZFINX ? GR_REGS : NO_REGS)" + "A floating-point register (if available, reuse GPR as FPR when use zfinx).") (define_register_constraint "j" "SIBCALL_REGS" "@internal") diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc index 3d02954..77bc65b 100644 --- a/gcc/config/riscv/riscv.cc +++ b/gcc/config/riscv/riscv.cc @@ -5420,6 +5420,13 @@ riscv_hard_regno_mode_ok (unsigned int regno, machine_mode mode) != call_used_or_fixed_reg_p (regno + i)) return false; + /* Only use even registers in RV32 ZDINX */ + if (!TARGET_64BIT && TARGET_ZDINX){ + if (GET_MODE_CLASS (mode) == MODE_FLOAT && + GET_MODE_UNIT_SIZE (mode) == GET_MODE_SIZE (DFmode)) + return !(regno & 1); + } + return true; } @@ -5659,7 +5666,7 @@ riscv_option_override (void) error ("%<-mdiv%> requires %<-march%> to subsume the %<M%> extension"); /* Likewise floating-point division and square root. */ - if (TARGET_HARD_FLOAT && (target_flags_explicit & MASK_FDIV) == 0) + if ((TARGET_HARD_FLOAT || TARGET_ZFINX) && (target_flags_explicit & MASK_FDIV) == 0) target_flags |= MASK_FDIV; /* Handle -mtune, use -mcpu if -mtune is not given, and use default -mtune @@ -5705,6 +5712,11 @@ riscv_option_override (void) if (TARGET_RVE && riscv_abi != ABI_ILP32E) error ("rv32e requires ilp32e ABI"); + // Zfinx require abi ilp32,ilp32e or lp64. + if (TARGET_ZFINX && riscv_abi != ABI_ILP32 + && riscv_abi != ABI_LP64 && riscv_abi != ABI_ILP32E) + error ("z*inx requires ABI ilp32, ilp32e or lp64"); + /* We do not yet support ILP32 on RV64. */ if (BITS_PER_WORD != POINTER_SIZE) error ("ABI requires %<-march=rv%d%>", POINTER_SIZE); @@ -6337,7 +6349,7 @@ riscv_libgcc_floating_mode_supported_p (scalar_float_mode mode) precision of the _FloatN type; evaluate all other operations and constants to the range and precision of the semantic type; - If we have the zfh extensions then we support _Float16 in native + If we have the zfh/zhinx extensions then we support _Float16 in native precision, so we should set this to 16. */ static enum flt_eval_method riscv_excess_precision (enum excess_precision_type type) @@ -6346,8 +6358,9 @@ riscv_excess_precision (enum excess_precision_type type) { case EXCESS_PRECISION_TYPE_FAST: case EXCESS_PRECISION_TYPE_STANDARD: - return (TARGET_ZFH ? FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16 - : FLT_EVAL_METHOD_PROMOTE_TO_FLOAT); + return ((TARGET_ZFH || TARGET_ZHINX) + ? FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16 + : FLT_EVAL_METHOD_PROMOTE_TO_FLOAT); case EXCESS_PRECISION_TYPE_IMPLICIT: case EXCESS_PRECISION_TYPE_FLOAT16: return FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16; |