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C-SKY: Strip hard float abi from hard float feature.
The hard float abi and hard float are different, Hard float abi: Use float register to pass float type arguments. Hard float: Enable the hard float ISA feature. So the with_fp_cond cannot represent these two features. When -mfloat-abi=softfp, the float abi is soft and hard float is enabled. So add 'with_hard_float_abi' in preconfigure and define 'CSKY_HARD_FLOAT_ABI' if float abi is hard, and use 'CSKY_HARD_FLOAT_ABI' to determine dynamic linker because it is what determines compatibility. And with_fp_cond is still needed to tell glibc whether to enable hard floating feature. In addition, use AC_TRY_COMMAND to test gcc to ensure compatibility between different versions of gcc. The original way has a problem that __CSKY_HARD_FLOAT_FPU_SF__ means the target only has single hard float-points ISA, so it's not defined in CPUs like ck810f. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
quxm
Mao Han
parent
41f67ccbe9
commit
ec6d2b83f2
@ -123,9 +123,12 @@
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/* C-SKY ABI version. */
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#undef CSKYABI
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/* C-SKY floating-point ABI. */
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/* C-SKY floating-point instructions. */
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#undef CSKY_HARD_FLOAT
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/* C-SKY floating-point ABI. */
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#undef CSKY_HARD_FLOAT_ABI
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/* RISC-V integer ABI for ld.so. */
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#undef RISCV_ABI_XLEN
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59
sysdeps/csky/preconfigure
Normal file → Executable file
59
sysdeps/csky/preconfigure
Normal file → Executable file
@ -5,10 +5,8 @@ case "$machine" in
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csky*)
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abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKYABI__ \(.*\)/\1/p'`
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hard_float=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_HARD_FLOAT__ \(.*\)/\1/p'`
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hard_float_sf=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_HARD_FLOAT_FPU_SF__ \(.*\)/\1/p'`
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soft_float=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_SOFT_FLOAT__ \(.*\)/\1/p'`
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hard_float_abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_HARD_FLOAT_ABI__ \(.*\)/\1/p'`
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@ -24,26 +22,39 @@ csky*)
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;;
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esac
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# __CSKY_HARD_FLOAT_ABI__ was added on gcc 11 to specify whether
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# -mfloat-abi=hard is set. On older gcc, the float ABI is defined solely
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# with __CSKY_HARD_FLOAT__. If __CSKY_HARD_FLOAT__ is set, it can be
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# either a hard-float ABI (gcc older than 11, or gcc11 -mfloat-abi=hard
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# (__CSKY_HARD_FLOAT_ABI__ is set) or -mfloat-abi=softfp
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# (__CSKY_HARD_FLOAT_ABI__ is not set). To be compatible with older gcc,
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# use __CSKY_HARD_FLOAT_FPU_SF__ identify if -mfloat-abi is supported,
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# because it is added to gcc at the same time as -mfloat-abi.
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if test -n "$hard_float"; then
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if test -z "$hard_float_sf"; then
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with_fp_cond=1
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else
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if test -n "$hard_float_abi"; then
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with_fp_cond=1
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else
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with_fp_cond=0
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fi
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fi
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# This check is for compatibility with GCC versions earlier than 11.
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# The older versions of C-SKY GCC do not support the '-mfloat-abi=softfp' option
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# and never define the '__CSKY_HARD_FLOAT_ABI__'.
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# Therefore, if a check for '-mfloat-abi=softfp' is added as the expression
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# 'defined(__CSKY_HARD_FLOAT__) && !defined(__CSKY_HARD_FLOAT_ABI__)'
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# which is correct for newer versions of GCC will not work for those older versions.
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# Since no expression compatible with all versions of GCC exists,
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# a check for the '-mfloat-abi=softfp' option is added.
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if { ac_try='${CC-cc} -S -mfloat-abi=softfp /dev/null 1>&5'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }; then
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soft_float_abi_support=1
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else
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soft_float_abi_support=0
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fi
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if test -n "$soft_float"; then
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with_fp_cond=0
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with_hard_float_abi=0
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else
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with_fp_cond=1
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if test -n "$soft_float_abi_support"; then
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if test -n "$hard_float_abi"; then
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with_hard_float_abi=1
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else
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with_hard_float_abi=0
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fi
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else
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with_hard_float_abi=1
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fi
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fi
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base_machine=csky
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@ -55,6 +66,10 @@ _ACEOF
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cat >>confdefs.h <<_ACEOF
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#define CSKY_HARD_FLOAT $with_fp_cond
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_ACEOF
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cat >>confdefs.h <<_ACEOF
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#define CSKY_HARD_FLOAT_ABI $with_hard_float_abi
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_ACEOF
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;;
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@ -5,10 +5,8 @@ case "$machine" in
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csky*)
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abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKYABI__ \(.*\)/\1/p'`
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hard_float=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_HARD_FLOAT__ \(.*\)/\1/p'`
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hard_float_sf=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_HARD_FLOAT_FPU_SF__ \(.*\)/\1/p'`
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soft_float=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_SOFT_FLOAT__ \(.*\)/\1/p'`
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hard_float_abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
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sed -n 's/^#define __CSKY_HARD_FLOAT_ABI__ \(.*\)/\1/p'`
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@ -24,26 +22,34 @@ csky*)
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;;
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esac
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# __CSKY_HARD_FLOAT_ABI__ was added on gcc 11 to specify whether
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# -mfloat-abi=hard is set. On older gcc, the float ABI is defined solely
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# with __CSKY_HARD_FLOAT__. If __CSKY_HARD_FLOAT__ is set, it can be
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# either a hard-float ABI (gcc older than 11, or gcc11 -mfloat-abi=hard
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# (__CSKY_HARD_FLOAT_ABI__ is set) or -mfloat-abi=softfp
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# (__CSKY_HARD_FLOAT_ABI__ is not set). To be compatible with older gcc,
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# use __CSKY_HARD_FLOAT_FPU_SF__ identify if -mfloat-abi is supported,
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# because it is added to gcc at the same time as -mfloat-abi.
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if test -n "$hard_float"; then
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if test -z "$hard_float_sf"; then
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with_fp_cond=1
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else
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if test -n "$hard_float_abi"; then
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with_fp_cond=1
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else
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with_fp_cond=0
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fi
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fi
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# This check is for compatibility with GCC versions earlier than 11.
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# The older versions of C-SKY GCC do not support the '-mfloat-abi=softfp' option
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# and never define the '__CSKY_HARD_FLOAT_ABI__'.
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# Therefore, if a check for '-mfloat-abi=softfp' is added as the expression
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# 'defined(__CSKY_HARD_FLOAT__) && !defined(__CSKY_HARD_FLOAT_ABI__)'
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# which is correct for newer versions of GCC will not work for those older versions.
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# Since no expression compatible with all versions of GCC exists,
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# a check for the '-mfloat-abi=softfp' option is added.
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if AC_TRY_COMMAND(${CC-cc} -S -mfloat-abi=softfp /dev/null 1>&AS_MESSAGE_LOG_FD); then
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soft_float_abi_support=1
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else
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soft_float_abi_support=0
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fi
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if test -n "$soft_float"; then
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with_fp_cond=0
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with_hard_float_abi=0
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else
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with_fp_cond=1
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if test -n "$soft_float_abi_support"; then
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if test -n "$hard_float_abi"; then
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with_hard_float_abi=1
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else
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with_hard_float_abi=0
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fi
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else
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with_hard_float_abi=1
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fi
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fi
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base_machine=csky
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@ -51,5 +57,6 @@ csky*)
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AC_DEFINE_UNQUOTED([CSKYABI], [$abi])
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AC_DEFINE_UNQUOTED([CSKY_HARD_FLOAT], [$with_fp_cond])
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AC_DEFINE_UNQUOTED([CSKY_HARD_FLOAT_ABI], [$with_hard_float_abi])
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;;
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esac
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@ -1,8 +1,8 @@
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DEFAULT GLIBC_2.29
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%if CSKYABI == 2 && CSKY_HARD_FLOAT == 1
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%if CSKYABI == 2 && CSKY_HARD_FLOAT_ABI == 1
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ld=ld-linux-cskyv2-hf.so.1
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%elif CSKYABI == 2 && CSKY_HARD_FLOAT == 0
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%elif CSKYABI == 2 && CSKY_HARD_FLOAT_ABI == 0
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ld=ld-linux-cskyv2.so.1
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%else
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%error cannot determine ABI
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