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authorPeter Maydell <peter.maydell@linaro.org>2014-06-09 15:43:23 +0100
committerPeter Maydell <peter.maydell@linaro.org>2014-06-09 16:06:11 +0100
commit4e624edaebec9312be7b63096bbe5b2fe76f3613 (patch)
tree46f663737544db98997baf773922c5dc4387e9fe /target-arm/translate.c
parent526d0096e56e82ffa5edb15bd75c5c093e61fa59 (diff)
downloadqemu-arm-4e624edaebec9312be7b63096bbe5b2fe76f3613.tar.gz
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.c26
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. */