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target-ppc: VSX Stage 4: Add xsresp

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This patch adds the VSX Scalar Reciprocal Estimate Single Precision
(xsresp) instruction.

The existing VSX_RE 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>
This commit is contained in:
Tom Musta 2014-01-15 08:10:36 -06:00 • committed by Alexander Graf
parent b24d0b472b
commit 2c0c52ae62
3 changed files with 13 additions and 4 deletions
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14
target-ppc/fpu_helper.c
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@ -1928,7 +1928,7 @@ VSX_DIV(xvdivsp, 4, float32, f32, 0, 0)
* fld - vsr_t field (f32 or f64)
* sfprf - set FPRF
*/
#define VSX_RE(op, nels, tp, fld, sfprf) \
#define VSX_RE(op, nels, tp, fld, sfprf, r2sp) \
void helper_##op(CPUPPCState *env, uint32_t opcode) \
{ \
ppc_vsr_t xt, xb; \
@ -1943,6 +1943,11 @@ void helper_##op(CPUPPCState *env, uint32_t opcode) \
fload_invalid_op_excp(env, POWERPC_EXCP_FP_VXSNAN, sfprf); \
} \
xt.fld[i] = tp##_div(tp##_one, xb.fld[i], &env->fp_status); \
\
if (r2sp) { \
xt.fld[i] = helper_frsp(env, xt.fld[i]); \
} \
\
if (sfprf) { \
helper_compute_fprf(env, xt.fld[0], sfprf); \
} \
@ -1952,9 +1957,10 @@ void helper_##op(CPUPPCState *env, uint32_t opcode) \
helper_float_check_status(env); \
}
VSX_RE(xsredp, 1, float64, f64, 1)
VSX_RE(xvredp, 2, float64, f64, 0)
VSX_RE(xvresp, 4, float32, f32, 0)
VSX_RE(xsredp, 1, float64, f64, 1, 0)
VSX_RE(xsresp, 1, float64, f64, 1, 1)
VSX_RE(xvredp, 2, float64, f64, 0, 0)
VSX_RE(xvresp, 4, float32, f32, 0, 0)
/* VSX_SQRT - VSX floating point square root
* op - instruction mnemonic