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git://sourceware.org/git/glibc.git
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a10b6ad471
asm volatile ("movfcsr2gr $t0, $fcsr0" ::: "$t0");
asm volatile ("st.d $t0, %0" :"=m"(restore_fcsr));
generate to the following instructions with -Og flag:
movfcsr2gr $t0, $zero
addi.d $t0, $sp, 2047(0x7ff)
addi.d $t0, $t0, 77(0x4d)
st.w $t0, $t0, 0
fcsr0 register and restore_fcsr variable are both stored in t0 register.
Change to:
asm volatile ("movfcsr2gr %0, $fcsr0" :"=r"(restore_fcsr));
to avoid restore_fcsr address in t0.
Comparing float value using memcmp because float value cannot be
directly compared for equality.
Put LOAD_REGISTER_FCSR and SAVE_REGISTER_FCC after LOAD_REGISTER_FLOAT.
Some float instructions may change fcsr register.
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|---|---|---|
| .. | ||
| bits | ||
| fpu | ||
| lp64 | ||
| nofpu | ||
| nptl | ||
| sys | ||
| __longjmp.S | ||
| abort-instr.h | ||
| bsd-_setjmp.c | ||
| bsd-setjmp.c | ||
| configure | ||
| configure.ac | ||
| cpu-tunables.c | ||
| dl-audit-check.h | ||
| dl-get-cpu-features.c | ||
| dl-irel.h | ||
| dl-link.sym | ||
| dl-machine.h | ||
| dl-tls.h | ||
| dl-tlsdesc.h | ||
| dl-tlsdesc.S | ||
| dl-trampoline.h | ||
| dl-trampoline.S | ||
| dl-tunables.list | ||
| e_sqrtl.c | ||
| fpu_control.h | ||
| hp-timing.h | ||
| Implies | ||
| jmpbuf-offsets.h | ||
| jmpbuf-unwind.h | ||
| ldsodefs.h | ||
| libc-tls.c | ||
| linkmap.h | ||
| machine-gmon.h | ||
| Makefile | ||
| math_private.h | ||
| math-use-builtins-ffs.h | ||
| preconfigure | ||
| preconfigure.ac | ||
| setjmp.S | ||
| sfp-machine.h | ||
| sotruss-lib.c | ||
| stackinfo.h | ||
| start.S | ||
| tininess.h | ||
| tlsdesc.c | ||
| tlsdesc.sym | ||
| tst-audit.h | ||
| tst-gnu2-tls2.h | ||
| tst-hwcap-tunables.c | ||