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[Qemu-devel] [PATCH 100/111] m68k: use log10l() to compute log10_FP0()
From: |
Bryce Lanham |
Subject: |
[Qemu-devel] [PATCH 100/111] m68k: use log10l() to compute log10_FP0() |
Date: |
Wed, 17 Aug 2011 15:54:05 -0500 |
From: Laurent Vivier <address@hidden>
Signed-off-by: Laurent Vivier <address@hidden>
---
target-m68k/helper.c | 22 +++++++---------------
1 files changed, 7 insertions(+), 15 deletions(-)
diff --git a/target-m68k/helper.c b/target-m68k/helper.c
index f67a2d8..0c60093 100644
--- a/target-m68k/helper.c
+++ b/target-m68k/helper.c
@@ -1368,23 +1368,15 @@ void HELPER(ln_FP0)(CPUState *env)
void HELPER(log10_FP0)(CPUState *env)
{
- float64 f, log2, log210;
- floatx80 res;
-
- /* log10(x) = log2(x) / log2(10) */
-
- DBG_FPUH("log10_FP0 %Lg", floatx80_to_ldouble(FP0_to_floatx80(env)));
- f = floatx80_to_float64(FP0_to_floatx80(env), &env->fp_status);
+ floatx80 val;
+ long double res;
- log2 = float64_log2(f, &env->fp_status);
- log210 = float64_log2(floatx80_to_float64(floatx80_10, &env->fp_status),
- &env->fp_status);
- res = floatx80_div(float64_to_floatx80(log2, &env->fp_status),
- float64_to_floatx80(log210, &env->fp_status),
- &env->fp_status);
- DBG_FPU(" = %Lg\n", floatx80_to_ldouble(res));
+ val = FP0_to_floatx80(env);
+ DBG_FPUH("log10_FP0 %Lg", floatx80_to_ldouble(val));
+ res = log10l(floatx80_to_ldouble(val));
+ DBG_FPU(" = %Lg\n", res);
- floatx80_to_FP0(env, res);
+ floatx80_to_FP0(env, ldouble_to_floatx80(res));
}
void HELPER(atan_FP0)(CPUState *env)
--
1.7.2.3
- [Qemu-devel] [PATCH 100/111] m68k: use log10l() to compute log10_FP0(),
Bryce Lanham <=
- [Qemu-devel] [PATCH 104/111] m68k: add fsincos instruction, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 106/111] m68k: add ftanh instruction, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 111/111] m68k: move from sr can use effective addresse on m68k, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 109/111] m68k: first draft of q800 emulation (not working), Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 107/111] m68k: add flognp1 instruction, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 108/111] m68k: add fatanh instruction, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 102/111] m68k: add fcosh instruction, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 110/111] m68k: add movec instruction, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 103/111] m68k: add fasin instruction, Bryce Lanham, 2011/08/17
- [Qemu-devel] [PATCH 101/111] m68k: correctly load signed word into floating point register, Bryce Lanham, 2011/08/17