| Message ID | 20181123144558.5048-2-richard.henderson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | tcg: Assorted cleanups | expand |
Richard Henderson <richard.henderson@linaro.org> writes: > For x86_64, this can result in smaller code when manipulating > TCG_TYPE_I32, as we can omit a REX prefix. I take it you mean passing TCG_TYPE_I32 back and forth from the register backing store in CPUEnv which TCG_AREG0 points at? Anyway: Reviewed-by: Alex Bennée <alex.bennee@linaro.org> > > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > tcg/i386/tcg-target.h | 8 ++------ > 1 file changed, 2 insertions(+), 6 deletions(-) > > diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h > index 9fdf37f23c..7488c3d869 100644 > --- a/tcg/i386/tcg-target.h > +++ b/tcg/i386/tcg-target.h > @@ -84,6 +84,8 @@ typedef enum { > TCG_REG_RBP = TCG_REG_EBP, > TCG_REG_RSI = TCG_REG_ESI, > TCG_REG_RDI = TCG_REG_EDI, > + > + TCG_AREG0 = TCG_REG_EBP, > } TCGReg; > > /* used for function call generation */ > @@ -194,12 +196,6 @@ extern bool have_avx2; > #define TCG_TARGET_extract_i64_valid(ofs, len) \ > (((ofs) == 8 && (len) == 8) || ((ofs) + (len)) == 32) > > -#if TCG_TARGET_REG_BITS == 64 > -# define TCG_AREG0 TCG_REG_R14 > -#else > -# define TCG_AREG0 TCG_REG_EBP > -#endif > - > static inline void flush_icache_range(uintptr_t start, uintptr_t stop) > { > } -- Alex Bennée
On 11/29/18 4:52 AM, Alex Bennée wrote: > > Richard Henderson <richard.henderson@linaro.org> writes: > >> For x86_64, this can result in smaller code when manipulating >> TCG_TYPE_I32, as we can omit a REX prefix. > > I take it you mean passing TCG_TYPE_I32 back and forth from the register > backing store in CPUEnv which TCG_AREG0 points at? Yes, exactly. Perhaps I should expand my comment... r~
diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h index 9fdf37f23c..7488c3d869 100644 --- a/tcg/i386/tcg-target.h +++ b/tcg/i386/tcg-target.h @@ -84,6 +84,8 @@ typedef enum { TCG_REG_RBP = TCG_REG_EBP, TCG_REG_RSI = TCG_REG_ESI, TCG_REG_RDI = TCG_REG_EDI, + + TCG_AREG0 = TCG_REG_EBP, } TCGReg; /* used for function call generation */ @@ -194,12 +196,6 @@ extern bool have_avx2; #define TCG_TARGET_extract_i64_valid(ofs, len) \ (((ofs) == 8 && (len) == 8) || ((ofs) + (len)) == 32) -#if TCG_TARGET_REG_BITS == 64 -# define TCG_AREG0 TCG_REG_R14 -#else -# define TCG_AREG0 TCG_REG_EBP -#endif - static inline void flush_icache_range(uintptr_t start, uintptr_t stop) { }
For x86_64, this can result in smaller code when manipulating TCG_TYPE_I32, as we can omit a REX prefix. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- tcg/i386/tcg-target.h | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)