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 <tommu...@gmail.com>
Reviewed-by: Richard Henderson <r...@twiddle.net>
---
V2: Updated conversion to single precision range.
target-ppc/fpu_helper.c | 14 ++++++++++----
target-ppc/helper.h | 1 +
target-ppc/translate.c | 2 ++
3 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/target-ppc/fpu_helper.c b/target-ppc/fpu_helper.c
index 49cf09a..ac52c23 100644
--- a/target-ppc/fpu_helper.c
+++ b/target-ppc/fpu_helper.c
@@ -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
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 308f97c..b1cf3c0 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -290,6 +290,7 @@ DEF_HELPER_2(xsaddsp, void, env, i32)
DEF_HELPER_2(xssubsp, void, env, i32)
DEF_HELPER_2(xsmulsp, void, env, i32)
DEF_HELPER_2(xsdivsp, void, env, i32)
+DEF_HELPER_2(xsresp, void, env, i32)
DEF_HELPER_2(xvadddp, void, env, i32)
DEF_HELPER_2(xvsubdp, void, env, i32)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index eddb9d2..3108a29 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -7362,6 +7362,7 @@ GEN_VSX_HELPER_2(xsaddsp, 0x00, 0x00, 0, PPC2_VSX207)
GEN_VSX_HELPER_2(xssubsp, 0x00, 0x01, 0, PPC2_VSX207)
GEN_VSX_HELPER_2(xsmulsp, 0x00, 0x02, 0, PPC2_VSX207)
GEN_VSX_HELPER_2(xsdivsp, 0x00, 0x03, 0, PPC2_VSX207)
+GEN_VSX_HELPER_2(xsresp, 0x14, 0x01, 0, PPC2_VSX207)
GEN_VSX_HELPER_2(xvadddp, 0x00, 0x0C, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvsubdp, 0x00, 0x0D, 0, PPC2_VSX)
@@ -10173,6 +10174,7 @@ GEN_XX3FORM(xsaddsp, 0x00, 0x00, PPC2_VSX207),
GEN_XX3FORM(xssubsp, 0x00, 0x01, PPC2_VSX207),
GEN_XX3FORM(xsmulsp, 0x00, 0x02, PPC2_VSX207),
GEN_XX3FORM(xsdivsp, 0x00, 0x03, PPC2_VSX207),
+GEN_XX2FORM(xsresp, 0x14, 0x01, PPC2_VSX207),
GEN_XX3FORM(xvadddp, 0x00, 0x0C, PPC2_VSX),
GEN_XX3FORM(xvsubdp, 0x00, 0x0D, PPC2_VSX),
--
1.7.1
