diff options
| author | Alex Bennée <alex.bennee@linaro.org> | 2014-03-17 16:31:52 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-03-17 16:31:52 +0000 |
| commit | 5201c13654c35e5e0173a9947848f3a9f9a5a8bc (patch) | |
| tree | 3312c0d23c6569709d6a526806535f60b7e2c529 /target-arm | |
| parent | 8b092ca9ef06fd308ecf1d46c805f938a95acc21 (diff) | |
target-arm: A64: Implement scalar saturating narrow ops
This completes the set of integer narrowing saturating ops including:
SQXTN, SQXTN2
SQXTUN, SQXTUN2
UQXTN, UQXTN2
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1394822294-14837-23-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'target-arm')
| -rw-r--r-- | target-arm/translate-a64.c | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index d88ebe224a..5f4c6bf22f 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -7200,7 +7200,8 @@ static void handle_2misc_reciprocal(DisasContext *s, int opcode, tcg_temp_free_ptr(fpst); } -static void handle_2misc_narrow(DisasContext *s, int opcode, bool u, bool is_q, +static void handle_2misc_narrow(DisasContext *s, bool scalar, + int opcode, bool u, bool is_q, int size, int rn, int rd) { /* Handle 2-reg-misc ops which are narrowing (so each 2*size element @@ -7209,13 +7210,22 @@ static void handle_2misc_narrow(DisasContext *s, int opcode, bool u, bool is_q, int pass; TCGv_i32 tcg_res[2]; int destelt = is_q ? 2 : 0; + int passes = scalar ? 1 : 2; - for (pass = 0; pass < 2; pass++) { + if (scalar) { + tcg_res[1] = tcg_const_i32(0); + } + + for (pass = 0; pass < passes; pass++) { TCGv_i64 tcg_op = tcg_temp_new_i64(); NeonGenNarrowFn *genfn = NULL; NeonGenNarrowEnvFn *genenvfn = NULL; - read_vec_element(s, tcg_op, rn, pass, MO_64); + if (scalar) { + read_vec_element(s, tcg_op, rn, pass, size + 1); + } else { + read_vec_element(s, tcg_op, rn, pass, MO_64); + } tcg_res[pass] = tcg_temp_new_i32(); switch (opcode) { @@ -7323,6 +7333,19 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) return; } break; + case 0x12: /* SQXTUN */ + if (u) { + unallocated_encoding(s); + return; + } + /* fall through */ + case 0x14: /* SQXTN, UQXTN */ + if (size == 3) { + unallocated_encoding(s); + return; + } + handle_2misc_narrow(s, true, opcode, u, false, size, rn, rd); + return; case 0xc ... 0xf: case 0x16 ... 0x1d: case 0x1f: @@ -7379,8 +7402,6 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn) default: /* Other categories of encoding in this class: * + SUQADD/USQADD/SQABS/SQNEG : size 8, 16, 32 or 64 - * + SQXTN/SQXTN2/SQXTUN/SQXTUN2/UQXTN/UQXTN2: - * narrowing saturate ops: size 64/32/16 -> 32/16/8 */ unsupported_encoding(s, insn); return; @@ -9096,7 +9117,7 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) unallocated_encoding(s); return; } - handle_2misc_narrow(s, opcode, u, is_q, size, rn, rd); + handle_2misc_narrow(s, false, opcode, u, is_q, size, rn, rd); return; case 0x4: /* CLS, CLZ */ if (size == 3) { @@ -9227,7 +9248,7 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) /* handle_2misc_narrow does a 2*size -> size operation, but these * instructions encode the source size rather than dest size. */ - handle_2misc_narrow(s, opcode, 0, is_q, size - 1, rn, rd); + handle_2misc_narrow(s, false, opcode, 0, is_q, size - 1, rn, rd); return; case 0x17: /* FCVTL, FCVTL2 */ handle_2misc_widening(s, opcode, is_q, size, rn, rd); |