| Message ID | 20240908022632.459477-2-richard.henderson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | tcg: Improve support for cmpsel_vec | expand |
On 8/9/24 04:26, Richard Henderson wrote: > From: TANG Tiancheng <tangtiancheng.ttc@alibaba-inc.com> > > The loop in the 32-bit case of the vector compare operation > was incorrectly incrementing by 8 bytes per iteration instead > of 4 bytes. This caused the function to process only half of > the intended elements. > > Cc: qemu-stable@nongnu.org > Fixes: 9622c697d1 (tcg: Add gvec compare with immediate and scalar operand) > Signed-off-by: TANG Tiancheng <tangtiancheng.ttc@alibaba-inc.com> > Reviewed-by: Liu Zhiwei <zhiwei_liu@linux.alibaba.com> > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> > Message-ID: <20240904142739.854-2-zhiwei_liu@linux.alibaba.com> > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > tcg/tcg-op-gvec.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c > index 0308732d9b..78ee1ced80 100644 > --- a/tcg/tcg-op-gvec.c > +++ b/tcg/tcg-op-gvec.c > @@ -3939,7 +3939,7 @@ void tcg_gen_gvec_cmps(TCGCond cond, unsigned vece, uint32_t dofs, > uint32_t i; > > tcg_gen_extrl_i64_i32(t1, c); > - for (i = 0; i < oprsz; i += 8) { > + for (i = 0; i < oprsz; i += 4) { Maybe using memop_size(vece) would have been safer to avoid copy/paste bugs? Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> > tcg_gen_ld_i32(t0, tcg_env, aofs + i); > tcg_gen_negsetcond_i32(cond, t0, t0, t1); > tcg_gen_st_i32(t0, tcg_env, dofs + i);
On 9/9/24 23:57, Philippe Mathieu-Daudé wrote: > On 8/9/24 04:26, Richard Henderson wrote: >> From: TANG Tiancheng <tangtiancheng.ttc@alibaba-inc.com> >> >> The loop in the 32-bit case of the vector compare operation >> was incorrectly incrementing by 8 bytes per iteration instead >> of 4 bytes. This caused the function to process only half of >> the intended elements. >> >> Cc: qemu-stable@nongnu.org >> Fixes: 9622c697d1 (tcg: Add gvec compare with immediate and scalar operand) >> Signed-off-by: TANG Tiancheng <tangtiancheng.ttc@alibaba-inc.com> >> Reviewed-by: Liu Zhiwei <zhiwei_liu@linux.alibaba.com> >> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> >> Message-ID: <20240904142739.854-2-zhiwei_liu@linux.alibaba.com> >> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> >> --- >> tcg/tcg-op-gvec.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c >> index 0308732d9b..78ee1ced80 100644 >> --- a/tcg/tcg-op-gvec.c >> +++ b/tcg/tcg-op-gvec.c >> @@ -3939,7 +3939,7 @@ void tcg_gen_gvec_cmps(TCGCond cond, unsigned vece, uint32_t dofs, >> uint32_t i; >> tcg_gen_extrl_i64_i32(t1, c); >> - for (i = 0; i < oprsz; i += 8) { >> + for (i = 0; i < oprsz; i += 4) { > > Maybe using memop_size(vece) would have been safer to avoid copy/paste bugs? No, vece can be smaller than 4 here. r~ > > Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> > >> tcg_gen_ld_i32(t0, tcg_env, aofs + i); >> tcg_gen_negsetcond_i32(cond, t0, t0, t1); >> tcg_gen_st_i32(t0, tcg_env, dofs + i); >
diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c index 0308732d9b..78ee1ced80 100644 --- a/tcg/tcg-op-gvec.c +++ b/tcg/tcg-op-gvec.c @@ -3939,7 +3939,7 @@ void tcg_gen_gvec_cmps(TCGCond cond, unsigned vece, uint32_t dofs, uint32_t i; tcg_gen_extrl_i64_i32(t1, c); - for (i = 0; i < oprsz; i += 8) { + for (i = 0; i < oprsz; i += 4) { tcg_gen_ld_i32(t0, tcg_env, aofs + i); tcg_gen_negsetcond_i32(cond, t0, t0, t1); tcg_gen_st_i32(t0, tcg_env, dofs + i);