diff options
| author | Alex Bennée <alex.bennee@linaro.org> | 2018-03-01 11:05:50 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-03-01 11:13:59 +0000 |
| commit | 2deb992b767d28035fac3b374c7730494ff0b43d (patch) | |
| tree | 6532e07e909ea79bb9e1587c9432dda73bdfe5b4 /target/arm | |
| parent | d32adeae1a71a8e71374fa48d3d6ab0ad4c23e94 (diff) | |
| download | qemu-2deb992b767d28035fac3b374c7730494ff0b43d.zip | |
arm/translate-a64: add FP16 FMULA/X/S to simd_three_reg_same_fp16
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-12-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm')
| -rw-r--r-- | target/arm/helper-a64.c | 24 | ||||
| -rw-r--r-- | target/arm/helper-a64.h | 2 | ||||
| -rw-r--r-- | target/arm/translate-a64.c | 15 |
3 files changed, 41 insertions, 0 deletions
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c index d0b284fec4..1ef13abd76 100644 --- a/target/arm/helper-a64.c +++ b/target/arm/helper-a64.c @@ -595,6 +595,30 @@ ADVSIMD_HALFOP(max) ADVSIMD_HALFOP(minnum) ADVSIMD_HALFOP(maxnum) +/* Data processing - scalar floating-point and advanced SIMD */ +float16 HELPER(advsimd_mulxh)(float16 a, float16 b, void *fpstp) +{ + float_status *fpst = fpstp; + + a = float16_squash_input_denormal(a, fpst); + b = float16_squash_input_denormal(b, fpst); + + if ((float16_is_zero(a) && float16_is_infinity(b)) || + (float16_is_infinity(a) && float16_is_zero(b))) { + /* 2.0 with the sign bit set to sign(A) XOR sign(B) */ + return make_float16((1U << 14) | + ((float16_val(a) ^ float16_val(b)) & (1U << 15))); + } + return float16_mul(a, b, fpst); +} + +/* fused multiply-accumulate */ +float16 HELPER(advsimd_muladdh)(float16 a, float16 b, float16 c, void *fpstp) +{ + float_status *fpst = fpstp; + return float16_muladd(a, b, c, 0, fpst); +} + /* * Floating point comparisons produce an integer result. Softfloat * routines return float_relation types which we convert to the 0/-1 diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h index 1cf40bda5e..9c1a95594c 100644 --- a/target/arm/helper-a64.h +++ b/target/arm/helper-a64.h @@ -61,3 +61,5 @@ DEF_HELPER_3(advsimd_cge_f16, i32, f16, f16, ptr) DEF_HELPER_3(advsimd_cgt_f16, i32, f16, f16, ptr) DEF_HELPER_3(advsimd_acge_f16, i32, f16, f16, ptr) DEF_HELPER_3(advsimd_acgt_f16, i32, f16, f16, ptr) +DEF_HELPER_3(advsimd_mulxh, f16, f16, f16, ptr) +DEF_HELPER_4(advsimd_muladdh, f16, f16, f16, f16, ptr) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index fb74dc1c45..0e2d298687 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -10286,9 +10286,17 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn) case 0x0: /* FMAXNM */ gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst); break; + case 0x1: /* FMLA */ + read_vec_element_i32(s, tcg_res, rd, pass, MO_16); + gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res, + fpst); + break; case 0x2: /* FADD */ gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst); break; + case 0x3: /* FMULX */ + gen_helper_advsimd_mulxh(tcg_res, tcg_op1, tcg_op2, fpst); + break; case 0x4: /* FCMEQ */ gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst); break; @@ -10298,6 +10306,13 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn) case 0x8: /* FMINNM */ gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst); break; + case 0x9: /* FMLS */ + /* As usual for ARM, separate negation for fused multiply-add */ + tcg_gen_xori_i32(tcg_op1, tcg_op1, 0x8000); + read_vec_element_i32(s, tcg_res, rd, pass, MO_16); + gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res, + fpst); + break; case 0xa: /* FSUB */ gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst); break; |