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target-ppc: Add VSX Rounding Instructions
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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>
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@agraf
Tom Musta authored and agraf committed Mar 5, 2014
1 parent 5177d2c commit 88e33d0
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68 changes: 68 additions & 0 deletions target-ppc/fpu_helper.c
View file
Expand Up @@ -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)
15 changes: 15 additions & 0 deletions target-ppc/helper.h
View file
Expand Up @@ -280,6 +280,11 @@ DEF_HELPER_2(xscvdpuxds, void, env, i32)
DEF_HELPER_2(xscvdpuxws, void, env, i32)
DEF_HELPER_2(xscvsxddp, void, env, i32)
DEF_HELPER_2(xscvuxddp, void, env, i32)
DEF_HELPER_2(xsrdpi, void, env, i32)
DEF_HELPER_2(xsrdpic, void, env, i32)
DEF_HELPER_2(xsrdpim, void, env, i32)
DEF_HELPER_2(xsrdpip, void, env, i32)
DEF_HELPER_2(xsrdpiz, void, env, i32)

DEF_HELPER_2(xvadddp, void, env, i32)
DEF_HELPER_2(xvsubdp, void, env, i32)
Expand Down Expand Up @@ -312,6 +317,11 @@ DEF_HELPER_2(xvcvsxddp, void, env, i32)
DEF_HELPER_2(xvcvuxddp, void, env, i32)
DEF_HELPER_2(xvcvsxwdp, void, env, i32)
DEF_HELPER_2(xvcvuxwdp, void, env, i32)
DEF_HELPER_2(xvrdpi, void, env, i32)
DEF_HELPER_2(xvrdpic, void, env, i32)
DEF_HELPER_2(xvrdpim, void, env, i32)
DEF_HELPER_2(xvrdpip, void, env, i32)
DEF_HELPER_2(xvrdpiz, void, env, i32)

DEF_HELPER_2(xvaddsp, void, env, i32)
DEF_HELPER_2(xvsubsp, void, env, i32)
Expand Down Expand Up @@ -344,6 +354,11 @@ DEF_HELPER_2(xvcvsxdsp, void, env, i32)
DEF_HELPER_2(xvcvuxdsp, void, env, i32)
DEF_HELPER_2(xvcvsxwsp, void, env, i32)
DEF_HELPER_2(xvcvuxwsp, void, env, i32)
DEF_HELPER_2(xvrspi, void, env, i32)
DEF_HELPER_2(xvrspic, void, env, i32)
DEF_HELPER_2(xvrspim, void, env, i32)
DEF_HELPER_2(xvrspip, void, env, i32)
DEF_HELPER_2(xvrspiz, void, env, i32)

DEF_HELPER_2(efscfsi, i32, env, i32)
DEF_HELPER_2(efscfui, i32, env, i32)
Expand Down
30 changes: 30 additions & 0 deletions target-ppc/translate.c
View file
Expand Up @@ -7333,6 +7333,11 @@ GEN_VSX_HELPER_2(xscvdpuxds, 0x10, 0x14, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xscvdpuxws, 0x10, 0x04, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xscvsxddp, 0x10, 0x17, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xscvuxddp, 0x10, 0x16, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xsrdpi, 0x12, 0x04, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xsrdpic, 0x16, 0x06, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xsrdpim, 0x12, 0x07, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xsrdpip, 0x12, 0x06, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xsrdpiz, 0x12, 0x05, 0, PPC2_VSX)

GEN_VSX_HELPER_2(xvadddp, 0x00, 0x0C, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvsubdp, 0x00, 0x0D, 0, PPC2_VSX)
Expand Down Expand Up @@ -7365,6 +7370,11 @@ GEN_VSX_HELPER_2(xvcvsxddp, 0x10, 0x1F, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvcvuxddp, 0x10, 0x1E, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvcvsxwdp, 0x10, 0x0F, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvcvuxwdp, 0x10, 0x0E, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrdpi, 0x12, 0x0C, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrdpic, 0x16, 0x0E, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrdpim, 0x12, 0x0F, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrdpip, 0x12, 0x0E, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrdpiz, 0x12, 0x0D, 0, PPC2_VSX)

GEN_VSX_HELPER_2(xvaddsp, 0x00, 0x08, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvsubsp, 0x00, 0x09, 0, PPC2_VSX)
Expand Down Expand Up @@ -7397,6 +7407,11 @@ GEN_VSX_HELPER_2(xvcvsxdsp, 0x10, 0x1B, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvcvuxdsp, 0x10, 0x1A, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvcvsxwsp, 0x10, 0x0B, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvcvuxwsp, 0x10, 0x0A, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrspi, 0x12, 0x08, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrspic, 0x16, 0x0A, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrspim, 0x12, 0x0B, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrspip, 0x12, 0x0A, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvrspiz, 0x12, 0x09, 0, PPC2_VSX)

#define VSX_LOGICAL(name, tcg_op) \
static void glue(gen_, name)(DisasContext * ctx) \
Expand Down Expand Up @@ -10119,6 +10134,11 @@ GEN_XX2FORM(xscvdpuxds, 0x10, 0x14, PPC2_VSX),
GEN_XX2FORM(xscvdpuxws, 0x10, 0x04, PPC2_VSX),
GEN_XX2FORM(xscvsxddp, 0x10, 0x17, PPC2_VSX),
GEN_XX2FORM(xscvuxddp, 0x10, 0x16, PPC2_VSX),
GEN_XX2FORM(xsrdpi, 0x12, 0x04, PPC2_VSX),
GEN_XX2FORM(xsrdpic, 0x16, 0x06, PPC2_VSX),
GEN_XX2FORM(xsrdpim, 0x12, 0x07, PPC2_VSX),
GEN_XX2FORM(xsrdpip, 0x12, 0x06, PPC2_VSX),
GEN_XX2FORM(xsrdpiz, 0x12, 0x05, PPC2_VSX),

GEN_XX3FORM(xvadddp, 0x00, 0x0C, PPC2_VSX),
GEN_XX3FORM(xvsubdp, 0x00, 0x0D, PPC2_VSX),
Expand Down Expand Up @@ -10151,6 +10171,11 @@ GEN_XX2FORM(xvcvsxddp, 0x10, 0x1F, PPC2_VSX),
GEN_XX2FORM(xvcvuxddp, 0x10, 0x1E, PPC2_VSX),
GEN_XX2FORM(xvcvsxwdp, 0x10, 0x0F, PPC2_VSX),
GEN_XX2FORM(xvcvuxwdp, 0x10, 0x0E, PPC2_VSX),
GEN_XX2FORM(xvrdpi, 0x12, 0x0C, PPC2_VSX),
GEN_XX2FORM(xvrdpic, 0x16, 0x0E, PPC2_VSX),
GEN_XX2FORM(xvrdpim, 0x12, 0x0F, PPC2_VSX),
GEN_XX2FORM(xvrdpip, 0x12, 0x0E, PPC2_VSX),
GEN_XX2FORM(xvrdpiz, 0x12, 0x0D, PPC2_VSX),

GEN_XX3FORM(xvaddsp, 0x00, 0x08, PPC2_VSX),
GEN_XX3FORM(xvsubsp, 0x00, 0x09, PPC2_VSX),
Expand Down Expand Up @@ -10183,6 +10208,11 @@ GEN_XX2FORM(xvcvsxdsp, 0x10, 0x1B, PPC2_VSX),
GEN_XX2FORM(xvcvuxdsp, 0x10, 0x1A, PPC2_VSX),
GEN_XX2FORM(xvcvsxwsp, 0x10, 0x0B, PPC2_VSX),
GEN_XX2FORM(xvcvuxwsp, 0x10, 0x0A, PPC2_VSX),
GEN_XX2FORM(xvrspi, 0x12, 0x08, PPC2_VSX),
GEN_XX2FORM(xvrspic, 0x16, 0x0A, PPC2_VSX),
GEN_XX2FORM(xvrspim, 0x12, 0x0B, PPC2_VSX),
GEN_XX2FORM(xvrspip, 0x12, 0x0A, PPC2_VSX),
GEN_XX2FORM(xvrspiz, 0x12, 0x09, PPC2_VSX),

#undef VSX_LOGICAL
#define VSX_LOGICAL(name, opc2, opc3, fl2) \
Expand Down

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