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[Qemu-devel] [PATCH 4/8] target-arm: A64: Implement scalar three differe
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 4/8] target-arm: A64: Implement scalar three different instructions |
Date: |
Fri, 7 Feb 2014 21:49:19 +0000 |
Implement the scalar three different instruction group:
it only has three instructions in it.
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/translate-a64.c | 95 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 94 insertions(+), 1 deletion(-)
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index 0ea8eb2..e38f7f5 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -5838,7 +5838,100 @@ static void disas_simd_scalar_shift_imm(DisasContext
*s, uint32_t insn)
*/
static void disas_simd_scalar_three_reg_diff(DisasContext *s, uint32_t insn)
{
- unsupported_encoding(s, insn);
+ bool is_u = extract32(insn, 29, 1);
+ int size = extract32(insn, 22, 2);
+ int opcode = extract32(insn, 12, 4);
+ int rm = extract32(insn, 16, 5);
+ int rn = extract32(insn, 5, 5);
+ int rd = extract32(insn, 0, 5);
+
+ if (is_u) {
+ unallocated_encoding(s);
+ return;
+ }
+
+ switch (opcode) {
+ case 0x9: /* SQDMLAL, SQDMLAL2 */
+ case 0xb: /* SQDMLSL, SQDMLSL2 */
+ case 0xd: /* SQDMULL, SQDMULL2 */
+ if (size == 0 || size == 3) {
+ unallocated_encoding(s);
+ return;
+ }
+ break;
+ default:
+ unallocated_encoding(s);
+ return;
+ }
+
+ if (size == 2) {
+ TCGv_i64 tcg_op1 = tcg_temp_new_i64();
+ TCGv_i64 tcg_op2 = tcg_temp_new_i64();
+ TCGv_i64 tcg_res = tcg_temp_new_i64();
+
+ read_vec_element(s, tcg_op1, rn, 0, MO_32 | MO_SIGN);
+ read_vec_element(s, tcg_op2, rm, 0, MO_32 | MO_SIGN);
+
+ tcg_gen_mul_i64(tcg_res, tcg_op1, tcg_op2);
+ gen_helper_neon_addl_saturate_s64(tcg_res, cpu_env, tcg_res, tcg_res);
+
+ switch (opcode) {
+ case 0xd: /* SQDMULL, SQDMULL2 */
+ break;
+ case 0xb: /* SQDMLSL, SQDMLSL2 */
+ tcg_gen_neg_i64(tcg_res, tcg_res);
+ /* fall through */
+ case 0x9: /* SQDMLAL, SQDMLAL2 */
+ read_vec_element(s, tcg_op1, rd, 0, MO_64);
+ gen_helper_neon_addl_saturate_s64(tcg_res, cpu_env,
+ tcg_res, tcg_op1);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ write_fp_dreg(s, rd, tcg_res);
+
+ tcg_temp_free_i64(tcg_op1);
+ tcg_temp_free_i64(tcg_op2);
+ tcg_temp_free_i64(tcg_res);
+ } else {
+ TCGv_i32 tcg_op1 = tcg_temp_new_i32();
+ TCGv_i32 tcg_op2 = tcg_temp_new_i32();
+ TCGv_i64 tcg_res = tcg_temp_new_i64();
+
+ read_vec_element_i32(s, tcg_op1, rn, 0, MO_16);
+ read_vec_element_i32(s, tcg_op2, rm, 0, MO_16);
+
+ gen_helper_neon_mull_s16(tcg_res, tcg_op1, tcg_op2);
+ gen_helper_neon_addl_saturate_s32(tcg_res, cpu_env, tcg_res, tcg_res);
+
+ switch (opcode) {
+ case 0xd: /* SQDMULL, SQDMULL2 */
+ break;
+ case 0xb: /* SQDMLSL, SQDMLSL2 */
+ gen_helper_neon_negl_u32(tcg_res, tcg_res);
+ /* fall through */
+ case 0x9: /* SQDMLAL, SQDMLAL2 */
+ {
+ TCGv_i64 tcg_op3 = tcg_temp_new_i64();
+ read_vec_element(s, tcg_op3, rd, 0, MO_32);
+ gen_helper_neon_addl_saturate_s32(tcg_res, cpu_env,
+ tcg_res, tcg_op3);
+ tcg_temp_free_i64(tcg_op3);
+ break;
+ }
+ default:
+ g_assert_not_reached();
+ }
+
+ tcg_gen_ext32u_i64(tcg_res, tcg_res);
+ write_fp_dreg(s, rd, tcg_res);
+
+ tcg_temp_free_i32(tcg_op1);
+ tcg_temp_free_i32(tcg_op2);
+ tcg_temp_free_i64(tcg_res);
+ }
}
static void handle_3same_64(DisasContext *s, int opcode, bool u,
--
1.8.5
- [Qemu-devel] [PATCH 2/8] target-arm: A64: Implement long vector x indexed insns, (continued)
- [Qemu-devel] [PATCH 2/8] target-arm: A64: Implement long vector x indexed insns, Peter Maydell, 2014/02/07
- [Qemu-devel] [PATCH 7/8] softfloat: Support halving the result of muladd operation, Peter Maydell, 2014/02/07
- [Qemu-devel] [PATCH 8/8] target-arm: A64: Implement remaining 3-same instructions, Peter Maydell, 2014/02/07
- [Qemu-devel] [PATCH 5/8] target-arm: A64: Implement SIMD FP compare and set insns, Peter Maydell, 2014/02/07
- [Qemu-devel] [PATCH 3/8] target-arm: A64: Implement SIMD scalar indexed instructions, Peter Maydell, 2014/02/07
- [Qemu-devel] [PATCH 6/8] target-arm: A64: Implement floating point pairwise insns, Peter Maydell, 2014/02/07
- [Qemu-devel] [PATCH 1/8] target-arm: A64: Implement plain vector SIMD indexed element insns, Peter Maydell, 2014/02/07
- [Qemu-devel] [PATCH 4/8] target-arm: A64: Implement scalar three different instructions,
Peter Maydell <=
- Re: [Qemu-devel] [PATCH 0/8] A64: Neon support, fourth set, Richard Henderson, 2014/02/10