https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78458
--- Comment #11 from joseph at codesourcery dot com <joseph at codesourcery dot
com> ---
For e500v2, that patch moves things from a libgcc build failure to a glibc
build failure having built libgcc successfully: many files in glibc fail
to build with errors of the form:
../sysdeps/ieee754/ldbl-128ibm/s_modfl.c: In function '__modfl':
../sysdeps/ieee754/ldbl-128ibm/s_modfl.c:91:1: error: unrecognizable insn:
}
^
(insn 31 30 32 2 (set (reg:DF 203)
(subreg:DF (reg:TI 202) 8))
"../sysdeps/ieee754/ldbl-128ibm/s_modfl.c":44 -1
(nil))
../sysdeps/ieee754/ldbl-128ibm/s_modfl.c:91:1: internal compiler error: in
extract_insn, at recog.c:2311
I think it would be reasonable for you to submit your patch for inclusion
at this point, as a useful incremental improvement. The above error is
fixed by a patch
Index: gcc/config/rs6000/spe.md
===================================================================
--- gcc/config/rs6000/spe.md (revision 242699)
+++ gcc/config/rs6000/spe.md (working copy)
@@ -2314,6 +2314,18 @@
}
})
+(define_insn "*frob_<SPE64:mode>_ti_8"
+ [(set (match_operand:SPE64 0 "nonimmediate_operand" "=r")
+ (subreg:SPE64 (match_operand:TI 1 "input_operand" "r") 8))]
+ "(TARGET_E500_DOUBLE && <SPE64:MODE>mode == DFmode)
+ || (TARGET_SPE && <SPE64:MODE>mode != DFmode)"
+{
+ if (WORDS_BIG_ENDIAN)
+ return "evmergelo %0,%Y1,%Z1";
+ else
+ return "evmergelo %0,%Z1,%Y1";
+})
+
(define_insn "*frob_tf_ti"
[(set (match_operand:TF 0 "gpc_reg_operand" "=r")
(subreg:TF (match_operand:TI 1 "gpc_reg_operand" "r") 0))]
(I'm familiar with this part of spe.md). That moves the error to an
assembler error from GCC generating bad offsets building s_fmal.o
/tmp/ccLQIeP5.s: Assembler messages:
/tmp/ccLQIeP5.s:735: Error: operand out of range (256 is not between 0 and 248)
which I need to investigate further.
