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| author | Tom Musta <tommusta@gmail.com> | 2014-01-15 08:10:38 -0600 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-03-05 03:06:36 +0100 |
| commit | 968e76bcab9a3c40f37c9a52822b6daa90ae7cd8 (patch) | |
| tree | dbab69d0042e1e7b416a1105649dc3b2e32e4074 /target-ppc/fpu_helper.c | |
| parent | cea4e57473efc2fad1d241e87984eba4e5d9690c (diff) | |
| download | qemu-968e76bcab9a3c40f37c9a52822b6daa90ae7cd8.zip qemu-968e76bcab9a3c40f37c9a52822b6daa90ae7cd8.tar.gz qemu-968e76bcab9a3c40f37c9a52822b6daa90ae7cd8.tar.bz2 | |
target-ppc: VSX Stage 4: add xsrsqrtesp
This patch adds the VSX Scalar Reciprocal Square Root Estimate
Single Precision (xsrsqrtesp) instruction.
The existing VSX_RSQRTE() macro is modified to support rounding
of the intermediate double-precision result to single precision.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/fpu_helper.c')
| -rw-r--r-- | target-ppc/fpu_helper.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/target-ppc/fpu_helper.c b/target-ppc/fpu_helper.c index fec9d1b..33da462 100644 --- a/target-ppc/fpu_helper.c +++ b/target-ppc/fpu_helper.c @@ -2018,7 +2018,7 @@ VSX_SQRT(xvsqrtsp, 4, float32, f32, 0, 0) * fld - vsr_t field (f32 or f64) * sfprf - set FPRF */ -#define VSX_RSQRTE(op, nels, tp, fld, sfprf) \ +#define VSX_RSQRTE(op, nels, tp, fld, sfprf, r2sp) \ void helper_##op(CPUPPCState *env, uint32_t opcode) \ { \ ppc_vsr_t xt, xb; \ @@ -2043,6 +2043,10 @@ void helper_##op(CPUPPCState *env, uint32_t opcode) \ } \ } \ \ + if (r2sp) { \ + xt.fld[i] = helper_frsp(env, xt.fld[i]); \ + } \ + \ if (sfprf) { \ helper_compute_fprf(env, xt.fld[i], sfprf); \ } \ @@ -2052,9 +2056,10 @@ void helper_##op(CPUPPCState *env, uint32_t opcode) \ helper_float_check_status(env); \ } -VSX_RSQRTE(xsrsqrtedp, 1, float64, f64, 1) -VSX_RSQRTE(xvrsqrtedp, 2, float64, f64, 0) -VSX_RSQRTE(xvrsqrtesp, 4, float32, f32, 0) +VSX_RSQRTE(xsrsqrtedp, 1, float64, f64, 1, 0) +VSX_RSQRTE(xsrsqrtesp, 1, float64, f64, 1, 1) +VSX_RSQRTE(xvrsqrtedp, 2, float64, f64, 0, 0) +VSX_RSQRTE(xvrsqrtesp, 4, float32, f32, 0, 0) static inline int ppc_float32_get_unbiased_exp(float32 f) { |