diff options
Diffstat (limited to 'target/arm/tcg/neon_helper.c')
| -rw-r--r-- | target/arm/tcg/neon_helper.c | 43 |
1 files changed, 27 insertions, 16 deletions
diff --git a/target/arm/tcg/neon_helper.c b/target/arm/tcg/neon_helper.c index 739e16e441..93b2076c64 100644 --- a/target/arm/tcg/neon_helper.c +++ b/target/arm/tcg/neon_helper.c @@ -598,13 +598,15 @@ NEON_VOP_ENV(qrdmulh_s32, neon_s32, 1) #undef NEON_FN #undef NEON_QDMULH32 -uint32_t HELPER(neon_narrow_u8)(uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_u8)(uint64_t x) { return (x & 0xffu) | ((x >> 8) & 0xff00u) | ((x >> 16) & 0xff0000u) | ((x >> 24) & 0xff000000u); } -uint32_t HELPER(neon_narrow_u16)(uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_u16)(uint64_t x) { return (x & 0xffffu) | ((x >> 16) & 0xffff0000u); } @@ -635,7 +637,8 @@ uint32_t HELPER(neon_narrow_round_high_u16)(uint64_t x) return ((x >> 16) & 0xffff) | ((x >> 32) & 0xffff0000); } -uint32_t HELPER(neon_unarrow_sat8)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_unarrow_sat8)(CPUARMState *env, uint64_t x) { uint16_t s; uint8_t d; @@ -662,7 +665,8 @@ uint32_t HELPER(neon_unarrow_sat8)(CPUARMState *env, uint64_t x) return res; } -uint32_t HELPER(neon_narrow_sat_u8)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_sat_u8)(CPUARMState *env, uint64_t x) { uint16_t s; uint8_t d; @@ -685,7 +689,8 @@ uint32_t HELPER(neon_narrow_sat_u8)(CPUARMState *env, uint64_t x) return res; } -uint32_t HELPER(neon_narrow_sat_s8)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_sat_s8)(CPUARMState *env, uint64_t x) { int16_t s; uint8_t d; @@ -708,7 +713,8 @@ uint32_t HELPER(neon_narrow_sat_s8)(CPUARMState *env, uint64_t x) return res; } -uint32_t HELPER(neon_unarrow_sat16)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_unarrow_sat16)(CPUARMState *env, uint64_t x) { uint32_t high; uint32_t low; @@ -728,10 +734,11 @@ uint32_t HELPER(neon_unarrow_sat16)(CPUARMState *env, uint64_t x) high = 0xffff; SET_QC(); } - return low | (high << 16); + return deposit32(low, 16, 16, high); } -uint32_t HELPER(neon_narrow_sat_u16)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_sat_u16)(CPUARMState *env, uint64_t x) { uint32_t high; uint32_t low; @@ -745,10 +752,11 @@ uint32_t HELPER(neon_narrow_sat_u16)(CPUARMState *env, uint64_t x) high = 0xffff; SET_QC(); } - return low | (high << 16); + return deposit32(low, 16, 16, high); } -uint32_t HELPER(neon_narrow_sat_s16)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_sat_s16)(CPUARMState *env, uint64_t x) { int32_t low; int32_t high; @@ -762,10 +770,11 @@ uint32_t HELPER(neon_narrow_sat_s16)(CPUARMState *env, uint64_t x) high = (high >> 31) ^ 0x7fff; SET_QC(); } - return (uint16_t)low | (high << 16); + return deposit32(low, 16, 16, high); } -uint32_t HELPER(neon_unarrow_sat32)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_unarrow_sat32)(CPUARMState *env, uint64_t x) { if (x & 0x8000000000000000ull) { SET_QC(); @@ -778,7 +787,8 @@ uint32_t HELPER(neon_unarrow_sat32)(CPUARMState *env, uint64_t x) return x; } -uint32_t HELPER(neon_narrow_sat_u32)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_sat_u32)(CPUARMState *env, uint64_t x) { if (x > 0xffffffffu) { SET_QC(); @@ -787,13 +797,14 @@ uint32_t HELPER(neon_narrow_sat_u32)(CPUARMState *env, uint64_t x) return x; } -uint32_t HELPER(neon_narrow_sat_s32)(CPUARMState *env, uint64_t x) +/* Only the low 32-bits of output are significant. */ +uint64_t HELPER(neon_narrow_sat_s32)(CPUARMState *env, uint64_t x) { if ((int64_t)x != (int32_t)x) { SET_QC(); - return ((int64_t)x >> 63) ^ 0x7fffffff; + return (uint32_t)((int64_t)x >> 63) ^ 0x7fffffff; } - return x; + return (uint32_t)x; } uint64_t HELPER(neon_widen_u8)(uint32_t x) |