From 72902672dc2ed6281cdb205259c1d52ecf01f6b2 Mon Sep 17 00:00:00 2001 From: Christophe Lyon Date: Fri, 4 Feb 2011 15:17:51 +0100 Subject: Set the right overflow bit for neon 32 and 64 bit saturating add/sub. Signed-off-by: Christophe Lyon Reviewed-by: Peter Maydell Signed-off-by: Aurelien Jarno --- target-arm/op_helper.c | 49 ------------------------------------------------- 1 file changed, 49 deletions(-) (limited to 'target-arm/op_helper.c') diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c index 43baa63..3de2610 100644 --- a/target-arm/op_helper.c +++ b/target-arm/op_helper.c @@ -424,52 +424,3 @@ uint32_t HELPER(ror_cc)(uint32_t x, uint32_t i) return ((uint32_t)x >> shift) | (x << (32 - shift)); } } - -uint64_t HELPER(neon_add_saturate_s64)(uint64_t src1, uint64_t src2) -{ - uint64_t res; - - res = src1 + src2; - if (((res ^ src1) & SIGNBIT64) && !((src1 ^ src2) & SIGNBIT64)) { - env->QF = 1; - res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64; - } - return res; -} - -uint64_t HELPER(neon_add_saturate_u64)(uint64_t src1, uint64_t src2) -{ - uint64_t res; - - res = src1 + src2; - if (res < src1) { - env->QF = 1; - res = ~(uint64_t)0; - } - return res; -} - -uint64_t HELPER(neon_sub_saturate_s64)(uint64_t src1, uint64_t src2) -{ - uint64_t res; - - res = src1 - src2; - if (((res ^ src1) & SIGNBIT64) && ((src1 ^ src2) & SIGNBIT64)) { - env->QF = 1; - res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64; - } - return res; -} - -uint64_t HELPER(neon_sub_saturate_u64)(uint64_t src1, uint64_t src2) -{ - uint64_t res; - - if (src1 < src2) { - env->QF = 1; - res = 0; - } else { - res = src1 - src2; - } - return res; -} -- cgit v1.1