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RISC-V: Promote Zaamo/Zalrsc to a when using an old binutils

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Binutils 2.42 and before don't support Zaamo/Zalrsc. When users specify
both Zaamo and Zalrsc, promote them to 'a' in the -march string.

This does not affect testsuite results for users with old versions of binutils.
Testcases that failed due to 'call'/isa string continue to fail after this PATCH
when using an old version of binutils.

gcc/ChangeLog:

	* common/config/riscv/riscv-common.cc: Add 'a' extension to
	riscv_combine_info.

Signed-off-by: Patrick O'Neill <patrick@rivosinc.com>
This commit is contained in:
Patrick O'Neill 2024-06-18 14:40:15 -07:00
parent 25860fd2a6
commit e03583e7ee
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gcc/common/config/riscv/riscv-common.cc
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@ -401,6 +401,7 @@ static const struct riscv_ext_version riscv_ext_version_table[] =
/* Combine extensions defined in this table */
static const struct riscv_ext_version riscv_combine_info[] =
{
{"a", ISA_SPEC_CLASS_20191213, 2, 1},
{"zk", ISA_SPEC_CLASS_NONE, 1, 0},
{"zkn", ISA_SPEC_CLASS_NONE, 1, 0},
{"zks", ISA_SPEC_CLASS_NONE, 1, 0},