diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2014-06-09 15:43:23 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-06-09 16:06:11 +0100 |
| commit | 4e624edaebec9312be7b63096bbe5b2fe76f3613 (patch) | |
| tree | 46f663737544db98997baf773922c5dc4387e9fe /target-arm/translate.c | |
| parent | 526d0096e56e82ffa5edb15bd75c5c093e61fa59 (diff) | |
target-arm: add support for v8 VMULL.P64 instruction
Add support for the VMULL.P64 polynomial 64x64 to 128 bit multiplication
instruction in the A32/T32 instruction sets; this is part of the v8
Crypto Extensions.
To do this we have to move the neon_pmull_64_{lo,hi} helpers from
helper-a64.c into neon_helper.c so they can be used by the AArch32
translator.
Inspired-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1401386724-26529-4-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'target-arm/translate.c')
| -rw-r--r-- | target-arm/translate.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/target-arm/translate.c b/target-arm/translate.c index 7124606723..41c3fc77b0 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -5977,7 +5977,7 @@ static int disas_neon_data_insn(CPUARMState * env, DisasContext *s, uint32_t ins {0, 0, 0, 9}, /* VQDMLSL */ {0, 0, 0, 0}, /* Integer VMULL */ {0, 0, 0, 1}, /* VQDMULL */ - {0, 0, 0, 15}, /* Polynomial VMULL */ + {0, 0, 0, 0xa}, /* Polynomial VMULL */ {0, 0, 0, 7}, /* Reserved: always UNDEF */ }; @@ -5996,6 +5996,30 @@ static int disas_neon_data_insn(CPUARMState * env, DisasContext *s, uint32_t ins return 1; } + /* Handle VMULL.P64 (Polynomial 64x64 to 128 bit multiply) + * outside the loop below as it only performs a single pass. + */ + if (op == 14 && size == 2) { + TCGv_i64 tcg_rn, tcg_rm, tcg_rd; + + if (!arm_feature(env, ARM_FEATURE_V8_PMULL)) { + return 1; + } + tcg_rn = tcg_temp_new_i64(); + tcg_rm = tcg_temp_new_i64(); + tcg_rd = tcg_temp_new_i64(); + neon_load_reg64(tcg_rn, rn); + neon_load_reg64(tcg_rm, rm); + gen_helper_neon_pmull_64_lo(tcg_rd, tcg_rn, tcg_rm); + neon_store_reg64(tcg_rd, rd); + gen_helper_neon_pmull_64_hi(tcg_rd, tcg_rn, tcg_rm); + neon_store_reg64(tcg_rd, rd + 1); + tcg_temp_free_i64(tcg_rn); + tcg_temp_free_i64(tcg_rm); + tcg_temp_free_i64(tcg_rd); + return 0; + } + /* Avoid overlapping operands. Wide source operands are always aligned so will never overlap with wide destinations in problematic ways. */ |