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[Qemu-ppc] [V4 PATCH 11/14] target-ppc: VSX Stage 4: add xsrsqrtesp
From: |
Tom Musta |
Subject: |
[Qemu-ppc] [V4 PATCH 11/14] target-ppc: VSX Stage 4: add xsrsqrtesp |
Date: |
Thu, 5 Dec 2013 09:45:00 -0600 |
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.
V2: Updated conversion to single precision range.
Signed-off-by: Tom Musta <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
---
target-ppc/fpu_helper.c | 13 +++++++++----
target-ppc/helper.h | 1 +
target-ppc/translate.c | 2 ++
3 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/target-ppc/fpu_helper.c b/target-ppc/fpu_helper.c
index 34a8b66..8825db2 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)
{
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 0192043..84c6ee1 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -292,6 +292,7 @@ DEF_HELPER_2(xsmulsp, void, env, i32)
DEF_HELPER_2(xsdivsp, void, env, i32)
DEF_HELPER_2(xsresp, void, env, i32)
DEF_HELPER_2(xssqrtsp, void, env, i32)
+DEF_HELPER_2(xsrsqrtesp, 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 b9cd35b..ae80289 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -7347,6 +7347,7 @@ 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(xssqrtsp, 0x16, 0x00, 0, PPC2_VSX207)
+GEN_VSX_HELPER_2(xsrsqrtesp, 0x14, 0x00, 0, PPC2_VSX207)
GEN_VSX_HELPER_2(xvadddp, 0x00, 0x0C, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvsubdp, 0x00, 0x0D, 0, PPC2_VSX)
@@ -10161,6 +10162,7 @@ GEN_XX3FORM(xsmulsp, 0x00, 0x02, PPC2_VSX207),
GEN_XX3FORM(xsdivsp, 0x00, 0x03, PPC2_VSX207),
GEN_XX2FORM(xsresp, 0x14, 0x01, PPC2_VSX207),
GEN_XX2FORM(xssqrtsp, 0x16, 0x00, PPC2_VSX207),
+GEN_XX2FORM(xsrsqrtesp, 0x14, 0x00, PPC2_VSX207),
GEN_XX3FORM(xvadddp, 0x00, 0x0C, PPC2_VSX),
GEN_XX3FORM(xvsubdp, 0x00, 0x0D, PPC2_VSX),
--
1.7.1
- [Qemu-ppc] [V4 PATCH 01/14] target-ppc: VSX Stage 4: Add VSX 2.07 Flag, (continued)
- [Qemu-ppc] [V4 PATCH 01/14] target-ppc: VSX Stage 4: Add VSX 2.07 Flag, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 04/14] target-ppc: VSX Stage 4: Refactor stxsdx, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 02/14] target-ppc: VSX Stage 4: Refactor lxsdx, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 03/14] target-ppc: VSX Stage 4: Add lxsiwax, lxsiwzx and lxsspx, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 05/14] target-ppc: VSX Stage 4: Add stxsiwx and stxsspx, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 06/14] target-ppc: VSX Stage 4: Add xsaddsp and xssubsp, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 07/14] target-ppc: VSX Stage 4: Add xsmulsp, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 08/14] target-ppc: VSX Stage 4: Add xsdivsp, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 09/14] target-ppc: VSX Stage 4: Add xsresp, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 10/14] target-ppc: VSX Stage 4: Add xssqrtsp, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 11/14] target-ppc: VSX Stage 4: add xsrsqrtesp,
Tom Musta <=
- [Qemu-ppc] [V4 PATCH 13/14] target-ppc: VSX Stage 4: Add xscvsxdsp and xscvuxdsp, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 14/14] target-ppc: VSX Stage 4: Add xxleqv, xxlnand and xxlorc, Tom Musta, 2013/12/05
- [Qemu-ppc] [V4 PATCH 12/14] target-ppc: VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Tom Musta, 2013/12/05