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target-arm: Pass fp status pointer explicitly to neon fp helpers

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Make the Neon helpers for various floating point operations take an
explicit pointer to the float_status they use, so they don't rely on
the global environment pointer any more. This also allows us to drop
the mul/sub/add helpers completely and just use the vfp versions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2011-05-25 13:49:19 +00:00
parent ae1857eca2
commit aa47cfdd17
3 changed files with 113 additions and 74 deletions
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57
target-arm/neon_helper.c
View file

@ -18,8 +18,6 @@
#define SET_QC() env->vfp.xregs[ARM_VFP_FPSCR] = CPSR_Q
#define NFS (&env->vfp.standard_fp_status)
#define NEON_TYPE1(name, type) \
typedef struct \
{ \
@ -1770,69 +1768,62 @@ uint32_t HELPER(neon_qneg_s32)(uint32_t x)
}
/* NEON Float helpers. */
uint32_t HELPER(neon_min_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_min_f32)(uint32_t a, uint32_t b, void *fpstp)
{
return float32_val(float32_min(make_float32(a), make_float32(b), NFS));
float_status *fpst = fpstp;
return float32_val(float32_min(make_float32(a), make_float32(b), fpst));
}
uint32_t HELPER(neon_max_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_max_f32)(uint32_t a, uint32_t b, void *fpstp)
{
return float32_val(float32_max(make_float32(a), make_float32(b), NFS));
float_status *fpst = fpstp;
return float32_val(float32_max(make_float32(a), make_float32(b), fpst));
}
uint32_t HELPER(neon_abd_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_abd_f32)(uint32_t a, uint32_t b, void *fpstp)
{
float_status *fpst = fpstp;
float32 f0 = make_float32(a);
float32 f1 = make_float32(b);
return float32_val(float32_abs(float32_sub(f0, f1, NFS)));
}
uint32_t HELPER(neon_add_f32)(uint32_t a, uint32_t b)
{
return float32_val(float32_add(make_float32(a), make_float32(b), NFS));
}
uint32_t HELPER(neon_sub_f32)(uint32_t a, uint32_t b)
{
return float32_val(float32_sub(make_float32(a), make_float32(b), NFS));
}
uint32_t HELPER(neon_mul_f32)(uint32_t a, uint32_t b)
{
return float32_val(float32_mul(make_float32(a), make_float32(b), NFS));
return float32_val(float32_abs(float32_sub(f0, f1, fpst)));
}
/* Floating point comparisons produce an integer result.
* Note that EQ doesn't signal InvalidOp for QNaNs but GE and GT do.
* Softfloat routines return 0/1, which we convert to the 0/-1 Neon requires.
*/
uint32_t HELPER(neon_ceq_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_ceq_f32)(uint32_t a, uint32_t b, void *fpstp)
{
return -float32_eq_quiet(make_float32(a), make_float32(b), NFS);
float_status *fpst = fpstp;
return -float32_eq_quiet(make_float32(a), make_float32(b), fpst);
}
uint32_t HELPER(neon_cge_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_cge_f32)(uint32_t a, uint32_t b, void *fpstp)
{
return -float32_le(make_float32(b), make_float32(a), NFS);
float_status *fpst = fpstp;
return -float32_le(make_float32(b), make_float32(a), fpst);
}
uint32_t HELPER(neon_cgt_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_cgt_f32)(uint32_t a, uint32_t b, void *fpstp)
{
return -float32_lt(make_float32(b), make_float32(a), NFS);
float_status *fpst = fpstp;
return -float32_lt(make_float32(b), make_float32(a), fpst);
}
uint32_t HELPER(neon_acge_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_acge_f32)(uint32_t a, uint32_t b, void *fpstp)
{
float_status *fpst = fpstp;
float32 f0 = float32_abs(make_float32(a));
float32 f1 = float32_abs(make_float32(b));
return -float32_le(f1, f0, NFS);
return -float32_le(f1, f0, fpst);
}
uint32_t HELPER(neon_acgt_f32)(uint32_t a, uint32_t b)
uint32_t HELPER(neon_acgt_f32)(uint32_t a, uint32_t b, void *fpstp)
{
float_status *fpst = fpstp;
float32 f0 = float32_abs(make_float32(a));
float32 f1 = float32_abs(make_float32(b));
return -float32_lt(f1, f0, NFS);
return -float32_lt(f1, f0, fpst);
}
#define ELEM(V, N, SIZE) (((V) >> ((N) * (SIZE))) & ((1ull << (SIZE)) - 1))