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path: root/arch/powerpc/math-emu/math_efp.c
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Diffstat (limited to 'arch/powerpc/math-emu/math_efp.c')
-rw-r--r--arch/powerpc/math-emu/math_efp.c100
1 files changed, 48 insertions, 52 deletions
diff --git a/arch/powerpc/math-emu/math_efp.c b/arch/powerpc/math-emu/math_efp.c
index 62279200d96..a73f0884d35 100644
--- a/arch/powerpc/math-emu/math_efp.c
+++ b/arch/powerpc/math-emu/math_efp.c
@@ -171,10 +171,6 @@ static unsigned long insn_type(unsigned long speinsn)
case EFDNABS: ret = XA; break;
case EFDNEG: ret = XA; break;
case EFDSUB: ret = AB; break;
-
- default:
- printk(KERN_ERR "\nOoops! SPE instruction no type found.");
- printk(KERN_ERR "\ninst code: %08lx\n", speinsn);
}
return ret;
@@ -195,7 +191,7 @@ int do_spe_mathemu(struct pt_regs *regs)
type = insn_type(speinsn);
if (type == NOTYPE)
- return -ENOSYS;
+ goto illegal;
func = speinsn & 0x7ff;
fc = (speinsn >> 21) & 0x1f;
@@ -212,12 +208,10 @@ int do_spe_mathemu(struct pt_regs *regs)
__FPU_FPSCR = mfspr(SPRN_SPEFSCR);
-#ifdef DEBUG
- printk("speinsn:%08lx spefscr:%08lx\n", speinsn, __FPU_FPSCR);
- printk("vc: %08x %08x\n", vc.wp[0], vc.wp[1]);
- printk("va: %08x %08x\n", va.wp[0], va.wp[1]);
- printk("vb: %08x %08x\n", vb.wp[0], vb.wp[1]);
-#endif
+ pr_debug("speinsn:%08lx spefscr:%08lx\n", speinsn, __FPU_FPSCR);
+ pr_debug("vc: %08x %08x\n", vc.wp[0], vc.wp[1]);
+ pr_debug("va: %08x %08x\n", va.wp[0], va.wp[1]);
+ pr_debug("vb: %08x %08x\n", vb.wp[0], vb.wp[1]);
switch (src) {
case SPFP: {
@@ -235,10 +229,8 @@ int do_spe_mathemu(struct pt_regs *regs)
break;
}
-#ifdef DEBUG
- printk("SA: %ld %08lx %ld (%ld)\n", SA_s, SA_f, SA_e, SA_c);
- printk("SB: %ld %08lx %ld (%ld)\n", SB_s, SB_f, SB_e, SB_c);
-#endif
+ pr_debug("SA: %ld %08lx %ld (%ld)\n", SA_s, SA_f, SA_e, SA_c);
+ pr_debug("SB: %ld %08lx %ld (%ld)\n", SB_s, SB_f, SB_e, SB_c);
switch (func) {
case EFSABS:
@@ -305,10 +297,10 @@ int do_spe_mathemu(struct pt_regs *regs)
FP_DECL_D(DB);
FP_CLEAR_EXCEPTIONS;
FP_UNPACK_DP(DB, vb.dp);
-#ifdef DEBUG
- printk("DB: %ld %08lx %08lx %ld (%ld)\n",
+
+ pr_debug("DB: %ld %08lx %08lx %ld (%ld)\n",
DB_s, DB_f1, DB_f0, DB_e, DB_c);
-#endif
+
FP_CONV(S, D, 1, 2, SR, DB);
goto pack_s;
}
@@ -332,9 +324,8 @@ int do_spe_mathemu(struct pt_regs *regs)
break;
pack_s:
-#ifdef DEBUG
- printk("SR: %ld %08lx %ld (%ld)\n", SR_s, SR_f, SR_e, SR_c);
-#endif
+ pr_debug("SR: %ld %08lx %ld (%ld)\n", SR_s, SR_f, SR_e, SR_c);
+
FP_PACK_SP(vc.wp + 1, SR);
goto update_regs;
@@ -365,12 +356,10 @@ cmp_s:
break;
}
-#ifdef DEBUG
- printk("DA: %ld %08lx %08lx %ld (%ld)\n",
+ pr_debug("DA: %ld %08lx %08lx %ld (%ld)\n",
DA_s, DA_f1, DA_f0, DA_e, DA_c);
- printk("DB: %ld %08lx %08lx %ld (%ld)\n",
+ pr_debug("DB: %ld %08lx %08lx %ld (%ld)\n",
DB_s, DB_f1, DB_f0, DB_e, DB_c);
-#endif
switch (func) {
case EFDABS:
@@ -438,10 +427,10 @@ cmp_s:
FP_DECL_S(SB);
FP_CLEAR_EXCEPTIONS;
FP_UNPACK_SP(SB, vb.wp + 1);
-#ifdef DEBUG
- printk("SB: %ld %08lx %ld (%ld)\n",
+
+ pr_debug("SB: %ld %08lx %ld (%ld)\n",
SB_s, SB_f, SB_e, SB_c);
-#endif
+
FP_CONV(D, S, 2, 1, DR, SB);
goto pack_d;
}
@@ -471,10 +460,9 @@ cmp_s:
break;
pack_d:
-#ifdef DEBUG
- printk("DR: %ld %08lx %08lx %ld (%ld)\n",
+ pr_debug("DR: %ld %08lx %08lx %ld (%ld)\n",
DR_s, DR_f1, DR_f0, DR_e, DR_c);
-#endif
+
FP_PACK_DP(vc.dp, DR);
goto update_regs;
@@ -511,12 +499,14 @@ cmp_d:
break;
}
-#ifdef DEBUG
- printk("SA0: %ld %08lx %ld (%ld)\n", SA0_s, SA0_f, SA0_e, SA0_c);
- printk("SA1: %ld %08lx %ld (%ld)\n", SA1_s, SA1_f, SA1_e, SA1_c);
- printk("SB0: %ld %08lx %ld (%ld)\n", SB0_s, SB0_f, SB0_e, SB0_c);
- printk("SB1: %ld %08lx %ld (%ld)\n", SB1_s, SB1_f, SB1_e, SB1_c);
-#endif
+ pr_debug("SA0: %ld %08lx %ld (%ld)\n",
+ SA0_s, SA0_f, SA0_e, SA0_c);
+ pr_debug("SA1: %ld %08lx %ld (%ld)\n",
+ SA1_s, SA1_f, SA1_e, SA1_c);
+ pr_debug("SB0: %ld %08lx %ld (%ld)\n",
+ SB0_s, SB0_f, SB0_e, SB0_c);
+ pr_debug("SB1: %ld %08lx %ld (%ld)\n",
+ SB1_s, SB1_f, SB1_e, SB1_c);
switch (func) {
case EVFSABS:
@@ -605,10 +595,11 @@ cmp_d:
break;
pack_vs:
-#ifdef DEBUG
- printk("SR0: %ld %08lx %ld (%ld)\n", SR0_s, SR0_f, SR0_e, SR0_c);
- printk("SR1: %ld %08lx %ld (%ld)\n", SR1_s, SR1_f, SR1_e, SR1_c);
-#endif
+ pr_debug("SR0: %ld %08lx %ld (%ld)\n",
+ SR0_s, SR0_f, SR0_e, SR0_c);
+ pr_debug("SR1: %ld %08lx %ld (%ld)\n",
+ SR1_s, SR1_f, SR1_e, SR1_c);
+
FP_PACK_SP(vc.wp, SR0);
FP_PACK_SP(vc.wp + 1, SR1);
goto update_regs;
@@ -646,14 +637,12 @@ update_regs:
current->thread.evr[fc] = vc.wp[0];
regs->gpr[fc] = vc.wp[1];
-#ifdef DEBUG
- printk("ccr = %08lx\n", regs->ccr);
- printk("cur exceptions = %08x spefscr = %08lx\n",
+ pr_debug("ccr = %08lx\n", regs->ccr);
+ pr_debug("cur exceptions = %08x spefscr = %08lx\n",
FP_CUR_EXCEPTIONS, __FPU_FPSCR);
- printk("vc: %08x %08x\n", vc.wp[0], vc.wp[1]);
- printk("va: %08x %08x\n", va.wp[0], va.wp[1]);
- printk("vb: %08x %08x\n", vb.wp[0], vb.wp[1]);
-#endif
+ pr_debug("vc: %08x %08x\n", vc.wp[0], vc.wp[1]);
+ pr_debug("va: %08x %08x\n", va.wp[0], va.wp[1]);
+ pr_debug("vb: %08x %08x\n", vb.wp[0], vb.wp[1]);
return 0;
@@ -661,9 +650,7 @@ illegal:
if (have_e500_cpu_a005_erratum) {
/* according to e500 cpu a005 erratum, reissue efp inst */
regs->nip -= 4;
-#ifdef DEBUG
- printk(KERN_DEBUG "re-issue efp inst: %08lx\n", speinsn);
-#endif
+ pr_debug("re-issue efp inst: %08lx\n", speinsn);
return 0;
}
@@ -685,13 +672,20 @@ int speround_handler(struct pt_regs *regs)
type = insn_type(speinsn & 0x7ff);
if (type == XCR) return -ENOSYS;
+ __FPU_FPSCR = mfspr(SPRN_SPEFSCR);
+ pr_debug("speinsn:%08lx spefscr:%08lx\n", speinsn, __FPU_FPSCR);
+
+ /* No need to round if the result is exact */
+ if (!(__FPU_FPSCR & FP_EX_INEXACT))
+ return 0;
+
fc = (speinsn >> 21) & 0x1f;
s_lo = regs->gpr[fc] & SIGN_BIT_S;
s_hi = current->thread.evr[fc] & SIGN_BIT_S;
fgpr.wp[0] = current->thread.evr[fc];
fgpr.wp[1] = regs->gpr[fc];
- __FPU_FPSCR = mfspr(SPRN_SPEFSCR);
+ pr_debug("round fgpr: %08x %08x\n", fgpr.wp[0], fgpr.wp[1]);
switch ((speinsn >> 5) & 0x7) {
/* Since SPE instructions on E500 core can handle round to nearest
@@ -731,6 +725,8 @@ int speround_handler(struct pt_regs *regs)
current->thread.evr[fc] = fgpr.wp[0];
regs->gpr[fc] = fgpr.wp[1];
+ pr_debug(" to fgpr: %08x %08x\n", fgpr.wp[0], fgpr.wp[1]);
+
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-21 20:06:38 +0000