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| author | Juha Riihimäki <juha.riihimaki@nokia.com> | 2011-01-08 16:01:15 +0000 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2011-01-12 00:06:06 +0100 |
| commit | 4ca4502c93a7ebc358d4e3b5574574e1d84f64b2 (patch) | |
| tree | b1546aae0de50c62dcf32dc6b7d3cfa2ec6de626 | |
| parent | 86865c5ff16bd1a2ef2b9ce217a7bb8f39e2126c (diff) | |
| download | qemu-4ca4502c93a7ebc358d4e3b5574574e1d84f64b2.zip qemu-4ca4502c93a7ebc358d4e3b5574574e1d84f64b2.tar.gz qemu-4ca4502c93a7ebc358d4e3b5574574e1d84f64b2.tar.bz2 | |
ARM: add neon helpers for VQSHLU
Add neon helper functions to implement VQSHLU, which is a
signed-to-unsigned version of VQSHL available only as an
immediate form.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | target-arm/helpers.h | 4 | ||||
| -rw-r--r-- | target-arm/neon_helper.c | 47 |
2 files changed, 51 insertions, 0 deletions
diff --git a/target-arm/helpers.h b/target-arm/helpers.h index 0d1bc47..b88ebae 100644 --- a/target-arm/helpers.h +++ b/target-arm/helpers.h @@ -249,6 +249,10 @@ DEF_HELPER_3(neon_qshl_u32, i32, env, i32, i32) DEF_HELPER_3(neon_qshl_s32, i32, env, i32, i32) DEF_HELPER_3(neon_qshl_u64, i64, env, i64, i64) DEF_HELPER_3(neon_qshl_s64, i64, env, i64, i64) +DEF_HELPER_3(neon_qshlu_s8, i32, env, i32, i32); +DEF_HELPER_3(neon_qshlu_s16, i32, env, i32, i32); +DEF_HELPER_3(neon_qshlu_s32, i32, env, i32, i32); +DEF_HELPER_3(neon_qshlu_s64, i64, env, i64, i64); DEF_HELPER_3(neon_qrshl_u8, i32, env, i32, i32) DEF_HELPER_3(neon_qrshl_s8, i32, env, i32, i32) DEF_HELPER_3(neon_qrshl_u16, i32, env, i32, i32) diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c index dae063e..20f3c16 100644 --- a/target-arm/neon_helper.c +++ b/target-arm/neon_helper.c @@ -632,6 +632,53 @@ uint64_t HELPER(neon_qshl_s64)(CPUState *env, uint64_t valop, uint64_t shiftop) return val; } +#define NEON_FN(dest, src1, src2) do { \ + if (src1 & (1 << (sizeof(src1) * 8 - 1))) { \ + SET_QC(); \ + dest = 0; \ + } else { \ + int8_t tmp; \ + tmp = (int8_t)src2; \ + if (tmp >= (ssize_t)sizeof(src1) * 8) { \ + if (src1) { \ + SET_QC(); \ + dest = ~0; \ + } else { \ + dest = 0; \ + } \ + } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \ + dest = 0; \ + } else if (tmp < 0) { \ + dest = src1 >> -tmp; \ + } else { \ + dest = src1 << tmp; \ + if ((dest >> tmp) != src1) { \ + SET_QC(); \ + dest = ~0; \ + } \ + } \ + }} while (0) +NEON_VOP_ENV(qshlu_s8, neon_u8, 4) +NEON_VOP_ENV(qshlu_s16, neon_u16, 2) +#undef NEON_FN + +uint32_t HELPER(neon_qshlu_s32)(CPUState *env, uint32_t valop, uint32_t shiftop) +{ + if ((int32_t)valop < 0) { + SET_QC(); + return 0; + } + return helper_neon_qshl_u32(env, valop, shiftop); +} + +uint64_t HELPER(neon_qshlu_s64)(CPUState *env, uint64_t valop, uint64_t shiftop) +{ + if ((int64_t)valop < 0) { + SET_QC(); + return 0; + } + return helper_neon_qshl_u64(env, valop, shiftop); +} /* FIXME: This is wrong. */ #define NEON_FN(dest, src1, src2) do { \ |