diff options
author | Peter Maydell <peter.maydell@linaro.org> | 2014-03-17 16:31:49 +0000 |
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committer | Peter Maydell <peter.maydell@linaro.org> | 2014-03-17 16:31:49 +0000 |
commit | 04c7c6c261c3000c851eb177a7d32236828f4be2 (patch) | |
tree | 1e7575827a6b63a6d82ef85fb3ac8ca0c7487c51 /target-arm | |
parent | 73a81d10fda3cb45e62efd6829f19debb9f54073 (diff) |
target-arm: A64: Implement FCVT[NMAPZ][SU] SIMD instructions
Implement the floating-point-to-integer conversion instructions
FCVT[NMAPZ][SU] in the 2-reg-misc and scalar-2-reg-misc
categories.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1394822294-14837-10-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'target-arm')
-rw-r--r-- | target-arm/translate-a64.c | 188 |
1 files changed, 169 insertions, 19 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 7fca9ff5dc..ec77c8b301 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -6683,11 +6683,14 @@ static void disas_simd_scalar_three_reg_same(DisasContext *s, uint32_t insn) } static void handle_2misc_64(DisasContext *s, int opcode, bool u, - TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) + TCGv_i64 tcg_rd, TCGv_i64 tcg_rn, + TCGv_i32 tcg_rmode, TCGv_ptr tcg_fpstatus) { /* Handle 64->64 opcodes which are shared between the scalar and * vector 2-reg-misc groups. We cover every integer opcode where size == 3 * is valid in either group and also the double-precision fp ops. + * The caller only need provide tcg_rmode and tcg_fpstatus if the op + * requires them. */ TCGCond cond; @@ -6741,6 +6744,28 @@ static void handle_2misc_64(DisasContext *s, int opcode, bool u, case 0x7f: /* FSQRT */ gen_helper_vfp_sqrtd(tcg_rd, tcg_rn, cpu_env); break; + case 0x1a: /* FCVTNS */ + case 0x1b: /* FCVTMS */ + case 0x1c: /* FCVTAS */ + case 0x3a: /* FCVTPS */ + case 0x3b: /* FCVTZS */ + { + TCGv_i32 tcg_shift = tcg_const_i32(0); + gen_helper_vfp_tosqd(tcg_rd, tcg_rn, tcg_shift, tcg_fpstatus); + tcg_temp_free_i32(tcg_shift); + break; + } + case 0x5a: /* FCVTNU */ + case 0x5b: /* FCVTMU */ + case 0x5c: /* FCVTAU */ + case 0x7a: /* FCVTPU */ + case 0x7b: /* FCVTZU */ + { + TCGv_i32 tcg_shift = tcg_const_i32(0); + gen_helper_vfp_touqd(tcg_rd, tcg_rn, tcg_shift, tcg_fpstatus); + tcg_temp_free_i32(tcg_shift); + break; + } default: g_assert_not_reached(); } @@ -6868,6 +6893,10 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) int opcode = extract32(insn, 12, 5); int size = extract32(insn, 22, 2); bool u = extract32(insn, 29, 1); + bool is_fcvt = false; + int rmode; + TCGv_i32 tcg_rmode; + TCGv_ptr tcg_fpstatus; switch (opcode) { case 0xa: /* CMLT */ @@ -6909,17 +6938,24 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) } case 0x1a: /* FCVTNS */ case 0x1b: /* FCVTMS */ - case 0x1c: /* FCVTAS */ case 0x3a: /* FCVTPS */ case 0x3b: /* FCVTZS */ - case 0x3d: /* FRECPE */ - case 0x3f: /* FRECPX */ - case 0x56: /* FCVTXN, FCVTXN2 */ case 0x5a: /* FCVTNU */ case 0x5b: /* FCVTMU */ - case 0x5c: /* FCVTAU */ case 0x7a: /* FCVTPU */ case 0x7b: /* FCVTZU */ + is_fcvt = true; + rmode = extract32(opcode, 5, 1) | (extract32(opcode, 0, 1) << 1); + break; + case 0x1c: /* FCVTAS */ + case 0x5c: /* FCVTAU */ + /* TIEAWAY doesn't fit in the usual rounding mode encoding */ + is_fcvt = true; + rmode = FPROUNDING_TIEAWAY; + break; + case 0x3d: /* FRECPE */ + case 0x3f: /* FRECPX */ + case 0x56: /* FCVTXN, FCVTXN2 */ case 0x7d: /* FRSQRTE */ unsupported_encoding(s, insn); return; @@ -6938,18 +6974,66 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) return; } + if (is_fcvt) { + tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode)); + gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); + tcg_fpstatus = get_fpstatus_ptr(); + } else { + TCGV_UNUSED_I32(tcg_rmode); + TCGV_UNUSED_PTR(tcg_fpstatus); + } + if (size == 3) { TCGv_i64 tcg_rn = read_fp_dreg(s, rn); TCGv_i64 tcg_rd = tcg_temp_new_i64(); - handle_2misc_64(s, opcode, u, tcg_rd, tcg_rn); + handle_2misc_64(s, opcode, u, tcg_rd, tcg_rn, tcg_rmode, tcg_fpstatus); write_fp_dreg(s, rd, tcg_rd); tcg_temp_free_i64(tcg_rd); tcg_temp_free_i64(tcg_rn); + } else if (size == 2) { + TCGv_i32 tcg_rn = read_fp_sreg(s, rn); + TCGv_i32 tcg_rd = tcg_temp_new_i32(); + + switch (opcode) { + case 0x1a: /* FCVTNS */ + case 0x1b: /* FCVTMS */ + case 0x1c: /* FCVTAS */ + case 0x3a: /* FCVTPS */ + case 0x3b: /* FCVTZS */ + { + TCGv_i32 tcg_shift = tcg_const_i32(0); + gen_helper_vfp_tosls(tcg_rd, tcg_rn, tcg_shift, tcg_fpstatus); + tcg_temp_free_i32(tcg_shift); + break; + } + case 0x5a: /* FCVTNU */ + case 0x5b: /* FCVTMU */ + case 0x5c: /* FCVTAU */ + case 0x7a: /* FCVTPU */ + case 0x7b: /* FCVTZU */ + { + TCGv_i32 tcg_shift = tcg_const_i32(0); + gen_helper_vfp_touls(tcg_rd, tcg_rn, tcg_shift, tcg_fpstatus); + tcg_temp_free_i32(tcg_shift); + break; + } + default: + g_assert_not_reached(); + } + + write_fp_sreg(s, rd, tcg_rd); + tcg_temp_free_i32(tcg_rd); + tcg_temp_free_i32(tcg_rn); } else { - /* the 'size might not be 64' ops aren't implemented yet */ g_assert_not_reached(); } + + if (is_fcvt) { + gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); + tcg_temp_free_i32(tcg_rmode); + tcg_temp_free_ptr(tcg_fpstatus); + } } /* SSHR[RA]/USHR[RA] - Vector shift right (optional rounding/accumulate) */ @@ -8573,6 +8657,11 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) bool is_q = extract32(insn, 30, 1); int rn = extract32(insn, 5, 5); int rd = extract32(insn, 0, 5); + bool need_fpstatus = false; + bool need_rmode = false; + int rmode = -1; + TCGv_i32 tcg_rmode; + TCGv_ptr tcg_fpstatus; switch (opcode) { case 0x0: /* REV64, REV32 */ @@ -8691,28 +8780,44 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) return; } break; + case 0x1a: /* FCVTNS */ + case 0x1b: /* FCVTMS */ + case 0x3a: /* FCVTPS */ + case 0x3b: /* FCVTZS */ + case 0x5a: /* FCVTNU */ + case 0x5b: /* FCVTMU */ + case 0x7a: /* FCVTPU */ + case 0x7b: /* FCVTZU */ + need_fpstatus = true; + need_rmode = true; + rmode = extract32(opcode, 5, 1) | (extract32(opcode, 0, 1) << 1); + if (size == 3 && !is_q) { + unallocated_encoding(s); + return; + } + break; + case 0x5c: /* FCVTAU */ + case 0x1c: /* FCVTAS */ + need_fpstatus = true; + need_rmode = true; + rmode = FPROUNDING_TIEAWAY; + if (size == 3 && !is_q) { + unallocated_encoding(s); + return; + } + break; case 0x16: /* FCVTN, FCVTN2 */ case 0x17: /* FCVTL, FCVTL2 */ case 0x18: /* FRINTN */ case 0x19: /* FRINTM */ - case 0x1a: /* FCVTNS */ - case 0x1b: /* FCVTMS */ - case 0x1c: /* FCVTAS */ case 0x38: /* FRINTP */ case 0x39: /* FRINTZ */ - case 0x3a: /* FCVTPS */ - case 0x3b: /* FCVTZS */ case 0x3c: /* URECPE */ case 0x3d: /* FRECPE */ case 0x56: /* FCVTXN, FCVTXN2 */ case 0x58: /* FRINTA */ case 0x59: /* FRINTX */ - case 0x5a: /* FCVTNU */ - case 0x5b: /* FCVTMU */ - case 0x5c: /* FCVTAU */ case 0x79: /* FRINTI */ - case 0x7a: /* FCVTPU */ - case 0x7b: /* FCVTZU */ case 0x7c: /* URSQRTE */ case 0x7d: /* FRSQRTE */ unsupported_encoding(s, insn); @@ -8728,6 +8833,18 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) return; } + if (need_fpstatus) { + tcg_fpstatus = get_fpstatus_ptr(); + } else { + TCGV_UNUSED_PTR(tcg_fpstatus); + } + if (need_rmode) { + tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode)); + gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); + } else { + TCGV_UNUSED_I32(tcg_rmode); + } + if (size == 3) { /* All 64-bit element operations can be shared with scalar 2misc */ int pass; @@ -8738,7 +8855,8 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) read_vec_element(s, tcg_op, rn, pass, MO_64); - handle_2misc_64(s, opcode, u, tcg_res, tcg_op); + handle_2misc_64(s, opcode, u, tcg_res, tcg_op, + tcg_rmode, tcg_fpstatus); write_vec_element(s, tcg_res, rd, pass, MO_64); @@ -8801,6 +8919,30 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) case 0x7f: /* FSQRT */ gen_helper_vfp_sqrts(tcg_res, tcg_op, cpu_env); break; + case 0x1a: /* FCVTNS */ + case 0x1b: /* FCVTMS */ + case 0x1c: /* FCVTAS */ + case 0x3a: /* FCVTPS */ + case 0x3b: /* FCVTZS */ + { + TCGv_i32 tcg_shift = tcg_const_i32(0); + gen_helper_vfp_tosls(tcg_res, tcg_op, + tcg_shift, tcg_fpstatus); + tcg_temp_free_i32(tcg_shift); + break; + } + case 0x5a: /* FCVTNU */ + case 0x5b: /* FCVTMU */ + case 0x5c: /* FCVTAU */ + case 0x7a: /* FCVTPU */ + case 0x7b: /* FCVTZU */ + { + TCGv_i32 tcg_shift = tcg_const_i32(0); + gen_helper_vfp_touls(tcg_res, tcg_op, + tcg_shift, tcg_fpstatus); + tcg_temp_free_i32(tcg_shift); + break; + } default: g_assert_not_reached(); } @@ -8893,6 +9035,14 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) if (!is_q) { clear_vec_high(s, rd); } + + if (need_rmode) { + gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env); + tcg_temp_free_i32(tcg_rmode); + } + if (need_fpstatus) { + tcg_temp_free_ptr(tcg_fpstatus); + } } /* C3.6.13 AdvSIMD scalar x indexed element |