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From: Laurent Vivier <laurent@vivier.eu>
To: qemu-devel@nongnu.org
Cc: "Aurelien Jarno" <aurelien@aurel32.net>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
	"Richard Henderson" <rth@twiddle.net>,
	"Laurent Vivier" <laurent@vivier.eu>
Subject: [Qemu-devel] [PATCH v2 5/7] target/m68k: add fsglmul and fsgldiv
Date: Tue, 27 Jun 2017 00:03:28 +0200	[thread overview]
Message-ID: <20170626220330.6785-6-laurent@vivier.eu> (raw)
In-Reply-To: <20170626220330.6785-1-laurent@vivier.eu>

fsglmul and fsgldiv truncate data to single precision before computing
results.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 target/m68k/fpu_helper.c | 22 ++++++++++++++++++++++
 target/m68k/helper.h     |  2 ++
 target/m68k/translate.c  |  6 ++++++
 3 files changed, 30 insertions(+)

diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c
index f6b6788..888abf6 100644
--- a/target/m68k/fpu_helper.c
+++ b/target/m68k/fpu_helper.c
@@ -249,6 +249,17 @@ void HELPER(fdmul)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
     PREC_END();
 }
 
+void HELPER(fsglmul)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
+{
+    floatx80 a, b;
+
+    PREC_BEGIN(32);
+    a = floatx80_round(val0->d, &env->fp_status);
+    b = floatx80_round(val1->d, &env->fp_status);
+    res->d = floatx80_mul(a, b, &env->fp_status);
+    PREC_END();
+}
+
 void HELPER(fdiv)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
 {
     res->d = floatx80_div(val1->d, val0->d, &env->fp_status);
@@ -268,6 +279,17 @@ void HELPER(fddiv)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
     PREC_END();
 }
 
+void HELPER(fsgldiv)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
+{
+    floatx80 a, b;
+
+    PREC_BEGIN(32);
+    a = floatx80_round(val1->d, &env->fp_status);
+    b = floatx80_round(val0->d, &env->fp_status);
+    res->d = floatx80_div(a, b, &env->fp_status);
+    PREC_END();
+}
+
 static int float_comp_to_cc(int float_compare)
 {
     switch (float_compare) {
diff --git a/target/m68k/helper.h b/target/m68k/helper.h
index 0c7f06f..f05191b 100644
--- a/target/m68k/helper.h
+++ b/target/m68k/helper.h
@@ -39,9 +39,11 @@ DEF_HELPER_4(fdsub, void, env, fp, fp, fp)
 DEF_HELPER_4(fmul, void, env, fp, fp, fp)
 DEF_HELPER_4(fsmul, void, env, fp, fp, fp)
 DEF_HELPER_4(fdmul, void, env, fp, fp, fp)
+DEF_HELPER_4(fsglmul, void, env, fp, fp, fp)
 DEF_HELPER_4(fdiv, void, env, fp, fp, fp)
 DEF_HELPER_4(fsdiv, void, env, fp, fp, fp)
 DEF_HELPER_4(fddiv, void, env, fp, fp, fp)
+DEF_HELPER_4(fsgldiv, void, env, fp, fp, fp)
 DEF_HELPER_FLAGS_3(fcmp, TCG_CALL_NO_RWG, void, env, fp, fp)
 DEF_HELPER_FLAGS_2(set_fpcr, TCG_CALL_NO_RWG, void, env, i32)
 DEF_HELPER_FLAGS_2(ftst, TCG_CALL_NO_RWG, void, env, fp)
diff --git a/target/m68k/translate.c b/target/m68k/translate.c
index df79653..253b8cc 100644
--- a/target/m68k/translate.c
+++ b/target/m68k/translate.c
@@ -4646,6 +4646,12 @@ DISAS_INSN(fpu)
     case 0x67: /* fdmul */
         gen_helper_fdmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
         break;
+    case 0x24: /* fsgldiv */
+        gen_helper_fsgldiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
+        break;
+    case 0x27: /* fsglmul */
+        gen_helper_fsglmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
+        break;
     case 0x28: /* fsub */
         gen_helper_fsub(cpu_env, cpu_dest, cpu_src, cpu_dest);
         break;
-- 
2.9.4

  parent reply	other threads:[~2017-06-26 22:04 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-26 22:03 [Qemu-devel] [PATCH v2 0/7] target/m68k: implement 680x0 FPU (part 2) Laurent Vivier
2017-06-26 22:03 ` [Qemu-devel] [PATCH v2 1/7] target/m68k: add fscc Laurent Vivier
2017-06-26 22:55   ` Richard Henderson
2017-06-26 22:03 ` [Qemu-devel] [PATCH v2 2/7] target/m68k: add fmovecr Laurent Vivier
2017-06-27 15:45   ` Philippe Mathieu-Daudé
2017-06-27 17:58     ` Laurent Vivier
2017-06-27 20:52       ` Philippe Mathieu-Daudé
2017-06-26 22:03 ` [Qemu-devel] [PATCH v2 3/7] target/m68k: add explicit single and double precision operations Laurent Vivier
2017-06-26 22:03 ` [Qemu-devel] [PATCH v2 4/7] softfloat: define floatx80_round() Laurent Vivier
2017-06-27 15:13   ` Laurent Vivier
2017-06-26 22:03 ` Laurent Vivier [this message]
2017-06-26 22:57   ` [Qemu-devel] [PATCH v2 5/7] target/m68k: add fsglmul and fsgldiv Richard Henderson
2017-06-26 22:03 ` [Qemu-devel] [PATCH v2 6/7] target/m68k: add explicit single and double precision operations (part 2) Laurent Vivier
2017-06-26 22:03 ` [Qemu-devel] [PATCH v2 7/7] target/m68k: add fmovem Laurent Vivier
2017-06-26 23:32   ` Richard Henderson

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