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-rw-r--r--toolchain/gcc/patches/git/riscv-preferred-mode-fix.patch19
1 files changed, 19 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/git/riscv-preferred-mode-fix.patch b/toolchain/gcc/patches/git/riscv-preferred-mode-fix.patch
new file mode 100644
index 000000000..ebab5bbe4
--- /dev/null
+++ b/toolchain/gcc/patches/git/riscv-preferred-mode-fix.patch
@@ -0,0 +1,19 @@
+diff -Nur gcc-git.orig/gcc/config/riscv/riscv.c gcc-git/gcc/config/riscv/riscv.c
+--- gcc-git.orig/gcc/config/riscv/riscv.c 2017-03-11 21:53:53.000000000 +0100
++++ gcc-git/gcc/config/riscv/riscv.c 2017-03-11 22:11:38.830507954 +0100
+@@ -3634,8 +3634,13 @@
+ static reg_class_t
+ riscv_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, reg_class_t rclass)
+ {
+- return reg_class_subset_p (FP_REGS, rclass) ? FP_REGS :
+- reg_class_subset_p (GR_REGS, rclass) ? GR_REGS :
++ machine_mode mode = GET_MODE (x);
++ if ((GET_MODE_CLASS (mode) == MODE_FLOAT
++ || GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
++ && reg_class_subset_p (FP_REGS, rclass))
++ return FP_REGS;
++
++ return reg_class_subset_p (GR_REGS, rclass) ? GR_REGS :
+ rclass;
+ }
+