Where Neon instructions are floating point operations, we
mostly use the old VFP utility functions like gen_vfp_abs()
which work on the TCG globals cpu_F0s and cpu_F1s. The
Neon for-each-element loop conditionally loads the inputs
into either a plain old TCG temporary for most operations
or into cpu_F0s for float operations, and similarly stores
back either cpu_F0s or the temporary.
Switch NEON_2RM_VABS_F away from using cpu_F0s, and
update neon_2rm_is_float_op() accordingly.
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Tested-by: Philippe Mathieu-Daudé <phi...@redhat.com>
Message-id: 20190613163917.28589-4-peter.mayd...@linaro.org
---
target/arm/translate.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index c274c8b4602..a10fded1f39 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -1374,14 +1374,6 @@ static TCGv_ptr get_fpstatus_ptr(int neon)
return statusptr;
}
-static inline void gen_vfp_abs(int dp)
-{
- if (dp)
- gen_helper_vfp_absd(cpu_F0d, cpu_F0d);
- else
- gen_helper_vfp_abss(cpu_F0s, cpu_F0s);
-}
-
static inline void gen_vfp_neg(int dp)
{
if (dp)
@@ -4191,8 +4183,13 @@ static const uint8_t neon_3r_sizes[] = {
static int neon_2rm_is_float_op(int op)
{
- /* Return true if this neon 2reg-misc op is float-to-float */
- return (op == NEON_2RM_VABS_F || op == NEON_2RM_VNEG_F ||
+ /*
+ * Return true if this neon 2reg-misc op is float-to-float.
+ * This is not a property of the operation but of our code --
+ * what we are asking here is "does the code for this case in
+ * the Neon for-each-pass loop use cpu_F0s?".
+ */
+ return (op == NEON_2RM_VNEG_F ||
(op >= NEON_2RM_VRINTN && op <= NEON_2RM_VRINTZ) ||
op == NEON_2RM_VRINTM ||
(op >= NEON_2RM_VRINTP && op <= NEON_2RM_VCVTMS) ||
@@ -6761,7 +6758,7 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t
insn)
break;
}
case NEON_2RM_VABS_F:
- gen_vfp_abs(0);
+ gen_helper_vfp_abss(tmp, tmp);
break;
case NEON_2RM_VNEG_F:
gen_vfp_neg(0);
--
2.20.1
