@@ -745,3 +745,25 @@ uint32_t HELPER(advsimd_acgt_f16)(float16 a, float16 b, void *fpstp)
int compare = float16_compare(f0, f1, fpst);
return ADVSIMD_CMPRES(compare == float_relation_greater);
}
+
+/* round to integral */
+float16 HELPER(advsimd_rinth_exact)(float16 x, void *fp_status)
+{
+ return float16_round_to_int(x, fp_status);
+}
+
+float16 HELPER(advsimd_rinth)(float16 x, void *fp_status)
+{
+ int old_flags = get_float_exception_flags(fp_status), new_flags;
+ float16 ret;
+
+ ret = float16_round_to_int(x, fp_status);
+
+ /* Suppress any inexact exceptions the conversion produced */
+ if (!(old_flags & float_flag_inexact)) {
+ new_flags = get_float_exception_flags(fp_status);
+ set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
+ }
+
+ return ret;
+}
@@ -75,3 +75,5 @@ DEF_HELPER_3(advsimd_maxnum2h, i32, i32, i32, ptr)
DEF_HELPER_3(advsimd_minnum2h, i32, i32, i32, ptr)
DEF_HELPER_3(advsimd_mulx2h, i32, i32, i32, ptr)
DEF_HELPER_4(advsimd_muladd2h, i32, i32, i32, i32, ptr)
+DEF_HELPER_2(advsimd_rinth_exact, f16, f16, ptr)
+DEF_HELPER_2(advsimd_rinth, f16, f16, ptr)
@@ -11180,27 +11180,140 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
*/
static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
{
- int fpop, opcode, a;
+ int fpop, opcode, a, u;
+ int rn, rd;
+ bool is_q;
+ bool is_scalar;
+ bool only_in_vector = false;
+
+ int pass;
+ TCGv_i32 tcg_rmode = NULL;
+ TCGv_ptr tcg_fpstatus = NULL;
+ bool need_rmode = false;
+ int rmode;
if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
unallocated_encoding(s);
return;
}
- if (!fp_access_check(s)) {
- return;
- }
+ rd = extract32(insn, 0, 5);
+ rn = extract32(insn, 5, 5);
- opcode = extract32(insn, 12, 4);
a = extract32(insn, 23, 1);
+ u = extract32(insn, 29, 1);
+ is_scalar = extract32(insn, 28, 1);
+ is_q = extract32(insn, 30, 1);
+
+ opcode = extract32(insn, 12, 5);
fpop = deposit32(opcode, 5, 1, a);
+ fpop = deposit32(fpop, 6, 1, u);
switch (fpop) {
+ case 0x18: /* FRINTN */
+ need_rmode = true;
+ only_in_vector = true;
+ rmode = FPROUNDING_TIEEVEN;
+ break;
+ case 0x19: /* FRINTM */
+ need_rmode = true;
+ only_in_vector = true;
+ rmode = FPROUNDING_NEGINF;
+ break;
+ case 0x38: /* FRINTP */
+ need_rmode = true;
+ only_in_vector = true;
+ rmode = FPROUNDING_POSINF;
+ break;
+ case 0x39: /* FRINTZ */
+ need_rmode = true;
+ only_in_vector = true;
+ rmode = FPROUNDING_ZERO;
+ break;
+ case 0x58: /* FRINTA */
+ need_rmode = true;
+ only_in_vector = true;
+ rmode = FPROUNDING_TIEAWAY;
+ break;
+ case 0x59: /* FRINTX */
+ case 0x79: /* FRINTI */
+ only_in_vector = true;
+ /* current rounding mode */
+ break;
default:
fprintf(stderr, "%s: insn %#04x fpop %#2x\n", __func__, insn, fpop);
g_assert_not_reached();
}
+
+ /* Check additional constraints for the scalar encoding */
+ if (is_scalar) {
+ if (!is_q) {
+ unallocated_encoding(s);
+ return;
+ }
+ /* FRINTxx is only in the vector form */
+ if (only_in_vector) {
+ unallocated_encoding(s);
+ return;
+ }
+ }
+
+ if (!fp_access_check(s)) {
+ return;
+ }
+
+ if (need_rmode) {
+ tcg_fpstatus = get_fpstatus_ptr(true);
+ }
+
+ if (need_rmode) {
+ tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
+ gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
+ }
+
+ if (is_scalar) {
+ /* no operations yet */
+ } else {
+ for (pass = 0; pass < (is_q ? 8 : 4); pass++) {
+ TCGv_i32 tcg_op = tcg_temp_new_i32();
+ TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+ read_vec_element_i32(s, tcg_op, rn, pass, MO_16);
+
+ switch (fpop) {
+ case 0x18: /* FRINTN */
+ case 0x19: /* FRINTM */
+ case 0x38: /* FRINTP */
+ case 0x39: /* FRINTZ */
+ case 0x58: /* FRINTA */
+ case 0x79: /* FRINTI */
+ gen_helper_advsimd_rinth(tcg_res, tcg_op, tcg_fpstatus);
+ break;
+ case 0x59: /* FRINTX */
+ gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, tcg_fpstatus);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ write_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+
+ tcg_temp_free_i32(tcg_res);
+ tcg_temp_free_i32(tcg_op);
+ }
+
+ clear_vec_high(s, is_q, rd);
+ }
+
+ if (tcg_rmode) {
+ gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
+ tcg_temp_free_i32(tcg_rmode);
+ }
+
+ if (tcg_fpstatus) {
+ tcg_temp_free_ptr(tcg_fpstatus);
+ }
}
/* AdvSIMD scalar x indexed element
This adds the full range of half-precision floating point to integral instructions. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> --- v3 - fix re-base conflicts - move comment to previous commit - don't double test is_scalar in unallocated checks --- target/arm/helper-a64.c | 22 ++++++++ target/arm/helper-a64.h | 2 + target/arm/translate-a64.c | 123 +++++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 142 insertions(+), 5 deletions(-) -- 2.15.1