diff options
Diffstat (limited to 'target-ppc/fpu_helper.c')
| -rw-r--r-- | target-ppc/fpu_helper.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/target-ppc/fpu_helper.c b/target-ppc/fpu_helper.c index ee03942c52..73227b7263 100644 --- a/target-ppc/fpu_helper.c +++ b/target-ppc/fpu_helper.c @@ -2095,3 +2095,57 @@ void helper_##op(CPUPPCState *env, uint32_t opcode) \ VSX_TDIV(xstdivdp, 1, float64, f64, -1022, 1023, 52) VSX_TDIV(xvtdivdp, 2, float64, f64, -1022, 1023, 52) VSX_TDIV(xvtdivsp, 4, float32, f32, -126, 127, 23) + +/* VSX_TSQRT - VSX floating point test for square root + * op - instruction mnemonic + * nels - number of elements (1, 2 or 4) + * tp - type (float32 or float64) + * fld - vsr_t field (f32 or f64) + * emin - minimum unbiased exponent + * emax - maximum unbiased exponent + * nbits - number of fraction bits + */ +#define VSX_TSQRT(op, nels, tp, fld, emin, nbits) \ +void helper_##op(CPUPPCState *env, uint32_t opcode) \ +{ \ + ppc_vsr_t xa, xb; \ + int i; \ + int fe_flag = 0; \ + int fg_flag = 0; \ + \ + getVSR(xA(opcode), &xa, env); \ + getVSR(xB(opcode), &xb, env); \ + \ + for (i = 0; i < nels; i++) { \ + if (unlikely(tp##_is_infinity(xb.fld[i]) || \ + tp##_is_zero(xb.fld[i]))) { \ + fe_flag = 1; \ + fg_flag = 1; \ + } else { \ + int e_b = ppc_##tp##_get_unbiased_exp(xb.fld[i]); \ + \ + if (unlikely(tp##_is_any_nan(xb.fld[i]))) { \ + fe_flag = 1; \ + } else if (unlikely(tp##_is_zero(xb.fld[i]))) { \ + fe_flag = 1; \ + } else if (unlikely(tp##_is_neg(xb.fld[i]))) { \ + fe_flag = 1; \ + } else if (!tp##_is_zero(xb.fld[i]) && \ + (e_b <= (emin+nbits))) { \ + fe_flag = 1; \ + } \ + \ + if (unlikely(tp##_is_zero_or_denormal(xb.fld[i]))) { \ + /* XB is not zero because of the above check and */ \ + /* therefore must be denormalized. */ \ + fg_flag = 1; \ + } \ + } \ + } \ + \ + env->crf[BF(opcode)] = 0x8 | (fg_flag ? 4 : 0) | (fe_flag ? 2 : 0); \ +} + +VSX_TSQRT(xstsqrtdp, 1, float64, f64, -1022, 52) +VSX_TSQRT(xvtsqrtdp, 2, float64, f64, -1022, 52) +VSX_TSQRT(xvtsqrtsp, 4, float32, f32, -126, 23) |