| Message ID | 20211003214243.3813425-1-philipp.tomsich@vrull.eu (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/2] tcg: add dup_const_tl wrapper | expand |
On 10/3/21 5:42 PM, Philipp Tomsich wrote: > dup_const always generates a uint64_t, which may exceed the size of a > target_long (generating warnings with recent-enough compilers). > > To ensure that we can use dup_const both for 64bit and 32bit targets, > this adds dup_const_tl, which either maps back to dup_const (for 64bit > targets) or provides a similar implementation using 32bit constants. > > Signed-off-by: Philipp Tomsich<philipp.tomsich@vrull.eu> > > --- Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
On 10/3/21 23:42, Philipp Tomsich wrote: > dup_const always generates a uint64_t, which may exceed the size of a > target_long (generating warnings with recent-enough compilers). > > To ensure that we can use dup_const both for 64bit and 32bit targets, > this adds dup_const_tl, which either maps back to dup_const (for 64bit > targets) or provides a similar implementation using 32bit constants. > > Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu> > > --- > > Changes in v2: > - Changed dup_const_tl to enforce the sanity check with > qemu_build_not_reached as requested in the review. > > include/tcg/tcg.h | 12 ++++++++++++ > 1 file changed, 12 insertions(+) Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
On 10/3/21 2:42 PM, Philipp Tomsich wrote: > dup_const always generates a uint64_t, which may exceed the size of a > target_long (generating warnings with recent-enough compilers). > > To ensure that we can use dup_const both for 64bit and 32bit targets, > this adds dup_const_tl, which either maps back to dup_const (for 64bit > targets) or provides a similar implementation using 32bit constants. > > Signed-off-by: Philipp Tomsich<philipp.tomsich@vrull.eu> > > --- > > Changes in v2: > - Changed dup_const_tl to enforce the sanity check with > qemu_build_not_reached as requested in the review. Queueing this one patch through tcg-next. I'll let Alistair take the other through riscv. r~
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h index 44ccd86f3e..1bb6c0ce3e 100644 --- a/include/tcg/tcg.h +++ b/include/tcg/tcg.h @@ -1272,6 +1272,18 @@ uint64_t dup_const(unsigned vece, uint64_t c); : (qemu_build_not_reached_always(), 0)) \ : dup_const(VECE, C)) +#if TARGET_LONG_BITS == 64 +# define dup_const_tl dup_const +#else +# define dup_const_tl(VECE, C) \ + (__builtin_constant_p(VECE) \ + ? ( (VECE) == MO_8 ? 0x01010101ul * (uint8_t)(C) \ + : (VECE) == MO_16 ? 0x00010001ul * (uint16_t)(C) \ + : (VECE) == MO_32 ? 0x00000001ul * (uint32_t)(C) \ + : (qemu_build_not_reached_always(), 0)) \ + : (target_long)dup_const(VECE, C)) +#endif + /* * Memory helpers that will be used by TCG generated code. */
dup_const always generates a uint64_t, which may exceed the size of a target_long (generating warnings with recent-enough compilers). To ensure that we can use dup_const both for 64bit and 32bit targets, this adds dup_const_tl, which either maps back to dup_const (for 64bit targets) or provides a similar implementation using 32bit constants. Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu> --- Changes in v2: - Changed dup_const_tl to enforce the sanity check with qemu_build_not_reached as requested in the review. include/tcg/tcg.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)