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target-arm: Prepare VFP_CONV_FIX helpers for A64 uses 

Make the VFP_CONV_FIX helpers a little more flexible in
preparation for the A64 uses. This requires two changes:
 * use the correct softfloat conversion function based on itype
   rather than always the int32 one; this is possible now that
   softfloat provides int16 versions and necessary for the
   future conversion-to-int64 A64 variants. This also allows
   us to drop the awkward 'sign' macro argument.
 * split the 'fsz' argument which currently controls both
   width of the input float type and width of the output
   integer type into two; this will allow us to specify the
   A64 64-bit-int-to-single conversion function, where the
   two widths are different.

We can also drop the (itype##_t) cast now that softfloat
guarantees that all the itype##_to_float* functions take
an integer argument of exactly the correct type.

Signed-off-by: Will Newton <will.newton@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Will Newton 2014-01-07 17:19:13 +00:00 committed by Peter Maydell
parent f9288a76f1
commit 8ed697e88b
1 changed files with 14 additions and 14 deletions
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28
target-arm/helper.c
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@ -3976,17 +3976,17 @@ float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
}
/* VFP3 fixed point conversion. */
#define VFP_CONV_FIX(name, p, fsz, itype, sign) \
float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \
void *fpstp) \
#define VFP_CONV_FIX(name, p, fsz, isz, itype) \
float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \
void *fpstp) \
{ \
float_status *fpst = fpstp; \
float##fsz tmp; \
tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \
tmp = itype##_to_##float##fsz(x, fpst); \
return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
} \
uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \
void *fpstp) \
uint##isz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \
void *fpstp) \
{ \
float_status *fpst = fpstp; \
float##fsz tmp; \
@ -3998,14 +3998,14 @@ uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \
return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \
}
VFP_CONV_FIX(sh, d, 64, int16, )
VFP_CONV_FIX(sl, d, 64, int32, )
VFP_CONV_FIX(uh, d, 64, uint16, u)
VFP_CONV_FIX(ul, d, 64, uint32, u)
VFP_CONV_FIX(sh, s, 32, int16, )
VFP_CONV_FIX(sl, s, 32, int32, )
VFP_CONV_FIX(uh, s, 32, uint16, u)
VFP_CONV_FIX(ul, s, 32, uint32, u)
VFP_CONV_FIX(sh, d, 64, 64, int16)
VFP_CONV_FIX(sl, d, 64, 64, int32)
VFP_CONV_FIX(uh, d, 64, 64, uint16)
VFP_CONV_FIX(ul, d, 64, 64, uint32)
VFP_CONV_FIX(sh, s, 32, 32, int16)
VFP_CONV_FIX(sl, s, 32, 32, int32)
VFP_CONV_FIX(uh, s, 32, 32, uint16)
VFP_CONV_FIX(ul, s, 32, 32, uint32)
#undef VFP_CONV_FIX
/* Half precision conversions. */