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| author | Peter Maydell <peter.maydell@linaro.org> | 2014-02-08 14:46:56 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-02-08 14:46:56 +0000 |
| commit | 3720a7ea364607a19b26745c40e648a1c0e20523 (patch) | |
| tree | 994391bd29df88e28038b638ec692f92c8aac921 /target-arm | |
| parent | c1de788ab9584e9629d6e9004d8cddd428b6cbe4 (diff) | |
| download | qemu-3720a7ea364607a19b26745c40e648a1c0e20523.tar.gz | |
target-arm: A64: Implement scalar pairwise ops
Implement the instructions in the scalar pairwise group (C3.6.8).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-arm')
| -rw-r--r-- | target-arm/translate-a64.c | 114 |
1 files changed, 113 insertions, 1 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 01f6b793fe..452b1fb9c3 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -5501,7 +5501,119 @@ static void disas_simd_scalar_copy(DisasContext *s, uint32_t insn) */ static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn) { - unsupported_encoding(s, insn); + int u = extract32(insn, 29, 1); + int size = extract32(insn, 22, 2); + int opcode = extract32(insn, 12, 5); + int rn = extract32(insn, 5, 5); + int rd = extract32(insn, 0, 5); + TCGv_ptr fpst; + + /* For some ops (the FP ones), size[1] is part of the encoding. + * For ADDP strictly it is not but size[1] is always 1 for valid + * encodings. + */ + opcode |= (extract32(size, 1, 1) << 5); + + switch (opcode) { + case 0x3b: /* ADDP */ + if (u || size != 3) { + unallocated_encoding(s); + return; + } + TCGV_UNUSED_PTR(fpst); + break; + case 0xc: /* FMAXNMP */ + case 0xd: /* FADDP */ + case 0xf: /* FMAXP */ + case 0x2c: /* FMINNMP */ + case 0x2f: /* FMINP */ + /* FP op, size[0] is 32 or 64 bit */ + if (!u) { + unallocated_encoding(s); + return; + } + size = extract32(size, 0, 1) ? 3 : 2; + fpst = get_fpstatus_ptr(); + break; + default: + unallocated_encoding(s); + return; + } + + if (size == 3) { + 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_64); + read_vec_element(s, tcg_op2, rn, 1, MO_64); + + switch (opcode) { + case 0x3b: /* ADDP */ + tcg_gen_add_i64(tcg_res, tcg_op1, tcg_op2); + break; + case 0xc: /* FMAXNMP */ + gen_helper_vfp_maxnumd(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0xd: /* FADDP */ + gen_helper_vfp_addd(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0xf: /* FMAXP */ + gen_helper_vfp_maxd(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0x2c: /* FMINNMP */ + gen_helper_vfp_minnumd(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0x2f: /* FMINP */ + gen_helper_vfp_mind(tcg_res, tcg_op1, tcg_op2, fpst); + 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_i32 tcg_res = tcg_temp_new_i32(); + + read_vec_element_i32(s, tcg_op1, rn, 0, MO_32); + read_vec_element_i32(s, tcg_op2, rn, 1, MO_32); + + switch (opcode) { + case 0xc: /* FMAXNMP */ + gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0xd: /* FADDP */ + gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0xf: /* FMAXP */ + gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0x2c: /* FMINNMP */ + gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst); + break; + case 0x2f: /* FMINP */ + gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst); + break; + default: + g_assert_not_reached(); + } + + write_fp_sreg(s, rd, tcg_res); + + tcg_temp_free_i32(tcg_op1); + tcg_temp_free_i32(tcg_op2); + tcg_temp_free_i32(tcg_res); + } + + if (!TCGV_IS_UNUSED_PTR(fpst)) { + tcg_temp_free_ptr(fpst); + } } /* |