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| author | Alex Bennée <alex.bennee@linaro.org> | 2014-03-18 23:10:06 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-03-18 23:10:06 +0000 |
| commit | 0a79bc87c3acf8364abf2d47b261fa898db15885 (patch) | |
| tree | d1fe2dcdc4f6a6de568e933afb1ac38448540d3a /target-arm/neon_helper.c | |
| parent | f72dbf3d2629be75d50b4c98816c360d82e8a848 (diff) | |
| download | qemu-0a79bc87c3acf8364abf2d47b261fa898db15885.zip qemu-0a79bc87c3acf8364abf2d47b261fa898db15885.tar.gz qemu-0a79bc87c3acf8364abf2d47b261fa898db15885.tar.bz2 | |
target-arm: A64: Add saturating int ops (SQNEG/SQABS)
This mostly re-uses the existing NEON helpers with an additional two for
the 64 bit case. I also took the opportunity to add TCG_CALL_NO_RWG
options to the helpers as they don't modify globals (saturation flags
are in the CPU Environment).
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-arm/neon_helper.c')
| -rw-r--r-- | target-arm/neon_helper.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c index 13752ba..e23f224 100644 --- a/target-arm/neon_helper.c +++ b/target-arm/neon_helper.c @@ -1776,6 +1776,28 @@ uint32_t HELPER(neon_qneg_s32)(CPUARMState *env, uint32_t x) return x; } +uint64_t HELPER(neon_qabs_s64)(CPUARMState *env, uint64_t x) +{ + if (x == SIGNBIT64) { + SET_QC(); + x = ~SIGNBIT64; + } else if ((int64_t)x < 0) { + x = -x; + } + return x; +} + +uint64_t HELPER(neon_qneg_s64)(CPUARMState *env, uint64_t x) +{ + if (x == SIGNBIT64) { + SET_QC(); + x = ~SIGNBIT64; + } else { + x = -x; + } + return x; +} + /* NEON Float helpers. */ uint32_t HELPER(neon_abd_f32)(uint32_t a, uint32_t b, void *fpstp) { |