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crossgcc: Enable rv32iafc-ilp32 configuration 

rv32iafc-ilp32 is compatible with rv32iac-ilp32 for library
implementation, so add a reuse rule allowing the default configuration
to support rv32iafc.

-IAFC is an unusual configuration (much less common than -IMAFC),
but multilib reuse has essentially no cost: this change is useful to
users of platforms that support hardware floating-point but cannot
use hardware multiply/divide for any reason. To avoid generating a
new set of libraries this is limited to the soft-float ABI.

Tested by verifying that `gcc -march=rv32iafc -mabi=ilp32
--print-search-dirs` refers to the rv32iac/ilp32 library directory
as expected, rather than just the root library directory as occurs
when an unsupported target is selected (for instance, rv32id).

Change-Id: Ie056ba6488a138fe0876eebf7cbc59477b3c3518
Signed-off-by: Peter Marheine <pmarheine@chromium.org>
Signed-off-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76539
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
This commit is contained in:
Patrick Georgi 2023-07-14 10:52:22 +02:00
parent 9922a8b363
commit e4d660b2dc
1 changed files with 55 additions and 0 deletions
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55
util/crossgcc/patches/gcc-11.4.0_rv32iafc.patch Normal file
View File

@ -0,0 +1,55 @@
From 88bc675eab98cea388daf40396686178ca5fcdb3 Mon Sep 17 00:00:00 2001
From: Peter Marheine <pmarheine@chromium.org>
Date: Mon, 15 Aug 2022 11:01:50 +1000
Subject: [PATCH] riscv: elf-multilib: add rv32iafc to defaults
rv32iafc-ilp32 is compatible with rv32iac-ilp32 for library
implementation, so add a reuse rule allowing the default configuration
to support rv32iafc.
-IAFC is an unusual configuration (much less common than -IMAFC), but
multilib reuse has essentially no cost: this change is useful to users
of platforms that support hardware floating-point but cannot use
hardware multiply/divide for any reason. To avoid generating a new set
of libraries this is limited to the soft-float ABI.
Tested by verifying that `gcc -march=rv32iafc -mabi=ilp32
--print-search-dirs` refers to the rv32iac/ilp32 library directory as
expected, rather than just the root library directory as occurs when an
unsupported target is selected (for instance, rv32id).
Signed-off-by: Peter Marheine <pmarheine@chromium.org>
---
gcc/config/riscv/t-elf-multilib | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/gcc/config/riscv/t-elf-multilib b/gcc/config/riscv/t-elf-multilib
index 19f9434616c..6e74b1811be 100644
--- a/gcc/config/riscv/t-elf-multilib
+++ b/gcc/config/riscv/t-elf-multilib
@@ -1,11 +1,12 @@
# This file was generated by multilib-generator with the command:
-# ./multilib-generator rv32i-ilp32--c rv32im-ilp32--c rv32iac-ilp32-- rv32imac-ilp32-- rv32imafc-ilp32f-rv32imafdc- rv64imac-lp64-- rv64imafdc-lp64d--
-MULTILIB_OPTIONS = march=rv32i/march=rv32ic/march=rv32im/march=rv32imc/march=rv32iac/march=rv32imac/march=rv32imafc/march=rv32imafdc/march=rv32gc/march=rv64imac/march=rv64imafdc/march=rv64gc mabi=ilp32/mabi=ilp32f/mabi=lp64/mabi=lp64d
+# ./multilib-generator rv32i-ilp32--c rv32im-ilp32--c rv32iac-ilp32--f rv32imac-ilp32-- rv32imafc-ilp32f-rv32imafdc- rv64imac-lp64-- rv64imafdc-lp64d--
+MULTILIB_OPTIONS = march=rv32i/march=rv32ic/march=rv32im/march=rv32imc/march=rv32iac/march=rv32iafc/march=rv32imac/march=rv32imafc/march=rv32imafdc/march=rv32gc/march=rv64imac/march=rv64imafdc/march=rv64gc mabi=ilp32/mabi=ilp32f/mabi=lp64/mabi=lp64d
MULTILIB_DIRNAMES = rv32i \
rv32ic \
rv32im \
rv32imc \
rv32iac \
+rv32iafc \
rv32imac \
rv32imafc \
rv32imafdc \
@@ -25,6 +26,7 @@ march=rv64imac/mabi=lp64 \
march=rv64imafdc/mabi=lp64d
MULTILIB_REUSE = march.rv32i/mabi.ilp32=march.rv32ic/mabi.ilp32 \
march.rv32im/mabi.ilp32=march.rv32imc/mabi.ilp32 \
+march.rv32iac/mabi.ilp32=march.rv32iafc/mabi.ilp32 \
march.rv32imafc/mabi.ilp32f=march.rv32imafdc/mabi.ilp32f \
march.rv32imafc/mabi.ilp32f=march.rv32gc/mabi.ilp32f \
march.rv64imafdc/mabi.lp64d=march.rv64gc/mabi.lp64d
--
2.37.1.595.g718a3a8f04-goog