* [binutils-gdb] RISC-V: Add support for 'Zvfh' and 'Zvfhmin'
@ 2023-08-03 7:52 Tsukasa OI
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From: Tsukasa OI @ 2023-08-03 7:52 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=e57ed3695a65ecbc76c195ad0535657150b7d5d9
commit e57ed3695a65ecbc76c195ad0535657150b7d5d9
Author: Tsukasa OI <research_trasio@irq.a4lg.com>
Date: Thu Aug 3 05:35:53 2023 +0000
RISC-V: Add support for 'Zvfh' and 'Zvfhmin'
This commit adds support for recently ratified vector FP16 extensions:
'Zvfh' and 'Zvfhmin'.
This is based on:
<https://github.com/riscv/riscv-v-spec/blob/master/v-spec.adoc#zvfhmin-vector-extension-for-minimal-half-precision-floating-point>
<https://github.com/riscv/riscv-v-spec/blob/master/v-spec.adoc#zvfh-vector-extension-for-half-precision-floating-point>
Despite not having any new instructions, it will be necessary since those
extensions are already implemented in GCC.
Note that however, in this commit, following dependencies are implemented.
1. 'Zvfhmin' -> 'Zve32f'
2. 'Zvfh' -> 'Zvfhmin' (not 'Zvfh' -> 'Zve32f' as in the documentation)
3. 'Zvfh' -> 'Zfhmin'
This is because the instructions and configurations supported by the
'Zvfh' extension is a strict superset of the 'Zvfhmin' extension and
'Zvfh' -> 'Zve32f' dependency is indirectly derived from that fact.
bfd/ChangeLog:
* elfxx-riscv.c (riscv_implicit_subsets): Add implications
related to 'Zvfh' and 'Zvfhmin' extensions.
(riscv_supported_std_z_ext) Add 'Zvfh' and 'Zvfhmin' to the list.
Diff:
---
bfd/elfxx-riscv.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
index 2ce95d90df5..ee459872948 100644
--- a/bfd/elfxx-riscv.c
+++ b/bfd/elfxx-riscv.c
@@ -1110,6 +1110,9 @@ static struct riscv_implicit_subset riscv_implicit_subsets[] =
{"v", "d", check_implicit_always},
{"v", "zve64d", check_implicit_always},
{"v", "zvl128b", check_implicit_always},
+ {"zvfh", "zvfhmin", check_implicit_always},
+ {"zvfh", "zfhmin", check_implicit_always},
+ {"zvfhmin", "zve32f", check_implicit_always},
{"zve64d", "d", check_implicit_always},
{"zve64d", "zve64f", check_implicit_always},
{"zve64f", "zve32f", check_implicit_always},
@@ -1287,6 +1290,8 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] =
{"zve64d", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
{"zvbb", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
{"zvbc", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
+ {"zvfh", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
+ {"zvfhmin", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
{"zvkg", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
{"zvkn", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
{"zvkng", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
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