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[Qemu-devel] [PATCH 10/14] VSX Stage 4: Add xssqrtsp
From: |
Tom Musta |
Subject: |
[Qemu-devel] [PATCH 10/14] VSX Stage 4: Add xssqrtsp |
Date: |
Wed, 6 Nov 2013 14:31:52 -0600 |
This patch adds the VSX Scalar Square Root Single Precision (xssqrtsp)
instruction.
The existing VSX_SQRT() macro is modified to support rounding of the
intermediate double-precision result to single-precision.
Signed-off-by: Tom Musta <address@hidden>
---
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 862f855..c4e52ea 100644
--- a/target-ppc/fpu_helper.c
+++ b/target-ppc/fpu_helper.c
@@ -1973,7 +1973,7 @@ VSX_RE(xvresp, 4, float32, f32, 0, 0)
* fld - vsr_t field (f32 or f64)
* sfprf - set FPRF
*/
-#define VSX_SQRT(op, nels, tp, fld, sfprf) \
+#define VSX_SQRT(op, nels, tp, fld, sfprf, r2sp) \
void helper_##op(CPUPPCState *env, uint32_t opcode) \
{ \
ppc_vsr_t xt, xb; \
@@ -1997,6 +1997,11 @@ void helper_##op(CPUPPCState *env, uint32_t opcode)
\
} \
} \
\
+ if (r2sp) { \
+ float32 tmp32 = float64_to_float32(xt.fld[i], &env->fp_status); \
+ xt.fld[i] = float32_to_float64(tmp32, &env->fp_status); \
+ } \
+ \
if (sfprf) { \
helper_compute_fprf(env, xt.fld[i], sfprf); \
} \
@@ -2006,9 +2011,10 @@ void helper_##op(CPUPPCState *env, uint32_t opcode)
\
helper_float_check_status(env); \
}
-VSX_SQRT(xssqrtdp, 1, float64, f64, 1)
-VSX_SQRT(xvsqrtdp, 2, float64, f64, 0)
-VSX_SQRT(xvsqrtsp, 4, float32, f32, 0)
+VSX_SQRT(xssqrtdp, 1, float64, f64, 1, 0)
+VSX_SQRT(xssqrtsp, 1, float64, f64, 1, 1)
+VSX_SQRT(xvsqrtdp, 2, float64, f64, 0, 0)
+VSX_SQRT(xvsqrtsp, 4, float32, f32, 0, 0)
/* VSX_RSQRTE - VSX floating point reciprocal square root estimate
* op - instruction mnemonic
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index b1cf3c0..0192043 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -291,6 +291,7 @@ 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(xssqrtsp, 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 c4c57a1..b9cd35b 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -7346,6 +7346,7 @@ 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(xssqrtsp, 0x16, 0x00, 0, PPC2_VSX207)
GEN_VSX_HELPER_2(xvadddp, 0x00, 0x0C, 0, PPC2_VSX)
GEN_VSX_HELPER_2(xvsubdp, 0x00, 0x0D, 0, PPC2_VSX)
@@ -10159,6 +10160,7 @@ 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_XX2FORM(xssqrtsp, 0x16, 0x00, PPC2_VSX207),
GEN_XX3FORM(xvadddp, 0x00, 0x0C, PPC2_VSX),
GEN_XX3FORM(xvsubdp, 0x00, 0x0D, PPC2_VSX),
--
1.7.1
- [Qemu-devel] [PATCH 00/14] VSX Stage 4, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 01/14] VSX Stage 4: Add VSX 2.07 Flag, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 02/14] VSX Stage 4: Refactor lxsdx, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 03/14] VSX Stage 4: Add lxsiwax, lxsiwzx and lxsspx, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 04/14] VSX Stage 4: Refactor stxsdx, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 05/14] VSX Stage 4: Add stxsiwx and stxsspx, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 06/14] VSX Stage 4: Add xsaddsp and xssubsp, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 07/14] VSX Stage 4: Add xsmulsp, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 08/14] VSX Stage 4: Add xsdivsp, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 10/14] VSX Stage 4: Add xssqrtsp,
Tom Musta <=
- [Qemu-devel] [PATCH 09/14] VSX Stage 4: Add xsresp, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 11/14] VSX Stage 4: add xsrsqrtesp, Tom Musta, 2013/11/06
- [Qemu-devel] [PATCH 12/14] VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Tom Musta, 2013/11/06
- Re: [Qemu-devel] [PATCH 12/14] VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Richard Henderson, 2013/11/07
- Re: [Qemu-devel] [PATCH 12/14] VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Richard Henderson, 2013/11/07
- Re: [Qemu-devel] [PATCH 12/14] VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Richard Henderson, 2013/11/07
- Re: [Qemu-devel] [PATCH 12/14] VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Tom Musta, 2013/11/13
- Re: [Qemu-devel] [PATCH 12/14] VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Richard Henderson, 2013/11/13
- Re: [Qemu-devel] [PATCH 12/14] VSX Stage 4: Add Scalar SP Fused Multiply-Adds, Tom Musta, 2013/11/14
[Qemu-devel] [PATCH 13/14] VSX Stage 4: Add xscvsxdsp and xscvuxdsp, Tom Musta, 2013/11/06