This adds support for the ARMv8 Advanced SIMD VMAXNM and VMINNM
instructions.
Signed-off-by: Will Newton <will.new...@linaro.org>
---
target-arm/helper.h | 3 +++
target-arm/neon_helper.c | 24 ++++++++++++++++++++++++
target-arm/translate.c | 23 +++++++++++++++++------
3 files changed, 44 insertions(+), 6 deletions(-)
diff --git a/target-arm/helper.h b/target-arm/helper.h
index d459a39..3ecbbd2 100644
--- a/target-arm/helper.h
+++ b/target-arm/helper.h
@@ -355,6 +355,9 @@ DEF_HELPER_3(neon_cgt_f32, i32, i32, i32, ptr)
DEF_HELPER_3(neon_acge_f32, i32, i32, i32, ptr)
DEF_HELPER_3(neon_acgt_f32, i32, i32, i32, ptr)
+DEF_HELPER_3(neon_maxnm_f32, i32, i32, i32, ptr)
+DEF_HELPER_3(neon_minnm_f32, i32, i32, i32, ptr)
+
/* iwmmxt_helper.c */
DEF_HELPER_2(iwmmxt_maddsq, i64, i64, i64)
DEF_HELPER_2(iwmmxt_madduq, i64, i64, i64)
diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c
index b028cc2..cc55e83 100644
--- a/target-arm/neon_helper.c
+++ b/target-arm/neon_helper.c
@@ -2008,3 +2008,27 @@ void HELPER(neon_zip16)(CPUARMState *env, uint32_t rd,
uint32_t rm)
env->vfp.regs[rm] = make_float64(m0);
env->vfp.regs[rd] = make_float64(d0);
}
+
+uint32_t HELPER(neon_maxnm_f32)(uint32_t a, uint32_t b, void *fpstp)
+{
+ float_status *fpst = fpstp;
+ float32 af = make_float32(a);
+ float32 bf = make_float32(b);
+ if (float32_is_quiet_nan(af) && !float32_is_quiet_nan(bf))
+ return b;
+ else if (float32_is_quiet_nan(bf) && !float32_is_quiet_nan(af))
+ return a;
+ return float32_val(float32_max(af, bf, fpst));
+}
+
+uint32_t HELPER(neon_minnm_f32)(uint32_t a, uint32_t b, void *fpstp)
+{
+ float_status *fpst = fpstp;
+ float32 af = make_float32(a);
+ float32 bf = make_float32(b);
+ if (float32_is_quiet_nan(af) && !float32_is_quiet_nan(bf))
+ return b;
+ else if (float32_is_quiet_nan(bf) && !float32_is_quiet_nan(af))
+ return a;
+ return float32_val(float32_min(af, bf, fpst));
+}
diff --git a/target-arm/translate.c b/target-arm/translate.c
index cac7668..9a4e7f4 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -4540,7 +4540,7 @@ static void gen_neon_narrow_op(int op, int u, int size,
#define NEON_3R_FLOAT_CMP 28 /* float VCEQ, VCGE, VCGT */
#define NEON_3R_FLOAT_ACMP 29 /* float VACGE, VACGT, VACLE, VACLT */
#define NEON_3R_FLOAT_MINMAX 30 /* float VMIN, VMAX */
-#define NEON_3R_VRECPS_VRSQRTS 31 /* float VRECPS, VRSQRTS */
+#define NEON_3R_VRECPS_VRSQRTS 31 /* float VRECPS, VRSQRTS, VMAXNM/MINNM */
static const uint8_t neon_3r_sizes[] = {
[NEON_3R_VHADD] = 0x7,
@@ -4835,7 +4835,8 @@ static int disas_neon_data_insn(CPUARMState * env,
DisasContext *s, uint32_t ins
}
break;
case NEON_3R_VRECPS_VRSQRTS:
- if (u) {
+ /* Encoding shared with VMAXNM/VMINNM in ARMv8 */
+ if (u && (!arm_feature(env, ARM_FEATURE_V8) || (size & 1))) {
return 1;
}
break;
@@ -5125,10 +5126,20 @@ static int disas_neon_data_insn(CPUARMState * env,
DisasContext *s, uint32_t ins
break;
}
case NEON_3R_VRECPS_VRSQRTS:
- if (size == 0)
- gen_helper_recps_f32(tmp, tmp, tmp2, cpu_env);
- else
- gen_helper_rsqrts_f32(tmp, tmp, tmp2, cpu_env);
+ if (u) {
+ /* VMAXNM/VMINNM */
+ TCGv_ptr fpstatus = get_fpstatus_ptr(1);
+ if (size == 0)
+ gen_helper_neon_maxnm_f32(tmp, tmp, tmp2, fpstatus);
+ else
+ gen_helper_neon_minnm_f32(tmp, tmp, tmp2, fpstatus);
+ tcg_temp_free_ptr(fpstatus);
+ } else {
+ if (size == 0)
+ gen_helper_recps_f32(tmp, tmp, tmp2, cpu_env);
+ else
+ gen_helper_rsqrts_f32(tmp, tmp, tmp2, cpu_env);
+ }
break;
case NEON_3R_VFM:
{
--
1.8.1.4
