This includes FMOV, FABS, FNEG, FSQRT and FRINT[NPMZAXI]. We re-use
existing helpers to achieve this.
Signed-off-by: Alex Bennée <alex.ben...@linaro.org>
---
v3
- make fabs a bitwise operation
- use read_vec_element_i32 to read value
- properly wire into disas_fp_1rc
---
target/arm/translate-a64.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 6704d66be7..be2bf50ddb 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -4596,6 +4596,65 @@ static void disas_fp_csel(DisasContext *s, uint32_t insn)
tcg_temp_free_i64(t_true);
}
+/* Floating-point data-processing (1 source) - half precision */
+static void handle_fp_1src_half(DisasContext *s, int opcode, int rd, int rn)
+{
+ TCGv_ptr fpst = NULL;
+ TCGv_i32 tcg_op = tcg_temp_new_i32();
+ TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+ read_vec_element_i32(s, tcg_op, rn, 0, MO_16);
+
+ switch (opcode) {
+ case 0x0: /* FMOV */
+ tcg_gen_mov_i32(tcg_res, tcg_op);
+ break;
+ case 0x1: /* FABS */
+ tcg_gen_andi_i32(tcg_res, tcg_op, 0x7fff);
+ break;
+ case 0x2: /* FNEG */
+ tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
+ break;
+ case 0x3: /* FSQRT */
+ gen_helper_sqrt_f16(tcg_res, tcg_op, cpu_env);
+ break;
+ case 0x8: /* FRINTN */
+ case 0x9: /* FRINTP */
+ case 0xa: /* FRINTM */
+ case 0xb: /* FRINTZ */
+ case 0xc: /* FRINTA */
+ {
+ TCGv_i32 tcg_rmode = tcg_const_i32(arm_rmode_to_sf(opcode & 7));
+ fpst = get_fpstatus_ptr(true);
+
+ gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
+ gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
+
+ gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
+ tcg_temp_free_i32(tcg_rmode);
+ break;
+ }
+ case 0xe: /* FRINTX */
+ fpst = get_fpstatus_ptr(true);
+ gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, fpst);
+ break;
+ case 0xf: /* FRINTI */
+ fpst = get_fpstatus_ptr(true);
+ gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
+ break;
+ default:
+ abort();
+ }
+
+ write_fp_sreg(s, rd, tcg_res);
+
+ if (fpst) {
+ tcg_temp_free_ptr(fpst);
+ }
+ tcg_temp_free_i32(tcg_op);
+ tcg_temp_free_i32(tcg_res);
+}
+
/* Floating-point data-processing (1 source) - single precision */
static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
{
@@ -4825,6 +4884,18 @@ static void disas_fp_1src(DisasContext *s, uint32_t insn)
handle_fp_1src_double(s, opcode, rd, rn);
break;
+ case 3:
+ if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+ unallocated_encoding(s);
+ return;
+ }
+
+ if (!fp_access_check(s)) {
+ return;
+ }
+
+ handle_fp_1src_half(s, opcode, rd, rn);
+ break;
default:
unallocated_encoding(s);
}
--
2.15.1
