diff options
| author | Tom Musta <tommusta@gmail.com> | 2014-01-02 16:21:35 -0600 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-03-05 03:06:32 +0100 |
| commit | 88e33d08c9c2fc0aabc9b832719324bd2d454db9 (patch) | |
| tree | 7dbd83f4375f18f375053b0da85acbb16d3d5768 /target-ppc/fpu_helper.c | |
| parent | 5177d2ca938496f060448f71f9edd9145231d9af (diff) | |
| download | qemu-88e33d08c9c2fc0aabc9b832719324bd2d454db9.tar.gz | |
target-ppc: Add VSX Rounding Instructions
This patch adds the VSX Round to Floating Point Integer instructions:
- xsrdpi, xsrdpic, xsrdpim, xsrdpip, xsrdpiz
- xvrdpi, xvrdpic, xvrdpim, xvrdpip, xvrdpiz
- xvrspi, xvrspic, xvrspim, xvrspip, xvrspiz
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 | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/target-ppc/fpu_helper.c b/target-ppc/fpu_helper.c index 3970652e8c..3165ef0ac4 100644 --- a/target-ppc/fpu_helper.c +++ b/target-ppc/fpu_helper.c @@ -2537,3 +2537,71 @@ VSX_CVT_INT_TO_FP(xvcvuxdsp, 2, uint64, float32, u64[i], f32[j], \ 2*i + JOFFSET, 0) VSX_CVT_INT_TO_FP(xvcvsxwsp, 4, int32, float32, u32[j], f32[i], i, 0) VSX_CVT_INT_TO_FP(xvcvuxwsp, 4, uint32, float32, u32[j], f32[i], i, 0) + +/* For "use current rounding mode", define a value that will not be one of + * the existing rounding model enums. + */ +#define FLOAT_ROUND_CURRENT (float_round_nearest_even + float_round_down + \ + float_round_up + float_round_to_zero) + +/* VSX_ROUND - VSX floating point round + * op - instruction mnemonic + * nels - number of elements (1, 2 or 4) + * tp - type (float32 or float64) + * fld - vsr_t field (f32 or f64) + * rmode - rounding mode + * sfprf - set FPRF + */ +#define VSX_ROUND(op, nels, tp, fld, rmode, sfprf) \ +void helper_##op(CPUPPCState *env, uint32_t opcode) \ +{ \ + ppc_vsr_t xt, xb; \ + int i; \ + getVSR(xB(opcode), &xb, env); \ + getVSR(xT(opcode), &xt, env); \ + \ + if (rmode != FLOAT_ROUND_CURRENT) { \ + set_float_rounding_mode(rmode, &env->fp_status); \ + } \ + \ + for (i = 0; i < nels; i++) { \ + if (unlikely(tp##_is_signaling_nan(xb.fld[i]))) { \ + fload_invalid_op_excp(env, POWERPC_EXCP_FP_VXSNAN, 0); \ + xt.fld[i] = tp##_snan_to_qnan(xb.fld[i]); \ + } else { \ + xt.fld[i] = tp##_round_to_int(xb.fld[i], &env->fp_status); \ + } \ + if (sfprf) { \ + helper_compute_fprf(env, xt.fld[i], sfprf); \ + } \ + } \ + \ + /* If this is not a "use current rounding mode" instruction, \ + * then inhibit setting of the XX bit and restore rounding \ + * mode from FPSCR */ \ + if (rmode != FLOAT_ROUND_CURRENT) { \ + fpscr_set_rounding_mode(env); \ + env->fp_status.float_exception_flags &= ~float_flag_inexact; \ + } \ + \ + putVSR(xT(opcode), &xt, env); \ + helper_float_check_status(env); \ +} + +VSX_ROUND(xsrdpi, 1, float64, f64, float_round_nearest_even, 1) +VSX_ROUND(xsrdpic, 1, float64, f64, FLOAT_ROUND_CURRENT, 1) +VSX_ROUND(xsrdpim, 1, float64, f64, float_round_down, 1) +VSX_ROUND(xsrdpip, 1, float64, f64, float_round_up, 1) +VSX_ROUND(xsrdpiz, 1, float64, f64, float_round_to_zero, 1) + +VSX_ROUND(xvrdpi, 2, float64, f64, float_round_nearest_even, 0) +VSX_ROUND(xvrdpic, 2, float64, f64, FLOAT_ROUND_CURRENT, 0) +VSX_ROUND(xvrdpim, 2, float64, f64, float_round_down, 0) +VSX_ROUND(xvrdpip, 2, float64, f64, float_round_up, 0) +VSX_ROUND(xvrdpiz, 2, float64, f64, float_round_to_zero, 0) + +VSX_ROUND(xvrspi, 4, float32, f32, float_round_nearest_even, 0) +VSX_ROUND(xvrspic, 4, float32, f32, FLOAT_ROUND_CURRENT, 0) +VSX_ROUND(xvrspim, 4, float32, f32, float_round_down, 0) +VSX_ROUND(xvrspip, 4, float32, f32, float_round_up, 0) +VSX_ROUND(xvrspiz, 4, float32, f32, float_round_to_zero, 0) |