#include "lp_bld_arit.h"
#include "lp_bld_flow.h"
+#if defined(PIPE_ARCH_SSE)
+#include <xmmintrin.h>
+#endif
+
+#ifndef _MM_DENORMALS_ZERO_MASK
+#define _MM_DENORMALS_ZERO_MASK 0x0040
+#endif
+
+#ifndef _MM_FLUSH_ZERO_MASK
+#define _MM_FLUSH_ZERO_MASK 0x8000
+#endif
#define EXP_POLY_DEGREE 5
}
}
else if (type.floating && util_cpu_caps.has_altivec) {
- debug_printf("%s: altivec doesn't support nan behavior modes\n",
- __FUNCTION__);
+ if (nan_behavior == GALLIVM_NAN_RETURN_NAN) {
+ debug_printf("%s: altivec doesn't support nan return nan behavior\n",
+ __FUNCTION__);
+ }
if (type.width == 32 && type.length == 4) {
intrinsic = "llvm.ppc.altivec.vminfp";
intr_size = 128;
}
} else if (util_cpu_caps.has_altivec) {
intr_size = 128;
- debug_printf("%s: altivec doesn't support nan behavior modes\n",
- __FUNCTION__);
if (type.width == 8) {
if (!type.sign) {
intrinsic = "llvm.ppc.altivec.vminub";
*/
if (util_cpu_caps.has_sse && type.floating &&
nan_behavior != GALLIVM_NAN_BEHAVIOR_UNDEFINED &&
- nan_behavior != GALLIVM_NAN_RETURN_SECOND) {
+ nan_behavior != GALLIVM_NAN_RETURN_OTHER_SECOND_NONNAN) {
LLVMValueRef isnan, max;
max = lp_build_intrinsic_binary_anylength(bld->gallivm, intrinsic,
type,
return lp_build_select(bld, cond, a, b);
}
break;
- case GALLIVM_NAN_RETURN_SECOND:
+ case GALLIVM_NAN_RETURN_OTHER_SECOND_NONNAN:
cond = lp_build_cmp_ordered(bld, PIPE_FUNC_LESS, a, b);
return lp_build_select(bld, cond, a, b);
case GALLIVM_NAN_BEHAVIOR_UNDEFINED:
}
}
else if (type.floating && util_cpu_caps.has_altivec) {
- debug_printf("%s: altivec doesn't support nan behavior modes\n",
- __FUNCTION__);
+ if (nan_behavior == GALLIVM_NAN_RETURN_NAN) {
+ debug_printf("%s: altivec doesn't support nan return nan behavior\n",
+ __FUNCTION__);
+ }
if (type.width == 32 || type.length == 4) {
intrinsic = "llvm.ppc.altivec.vmaxfp";
intr_size = 128;
}
} else if (util_cpu_caps.has_altivec) {
intr_size = 128;
- debug_printf("%s: altivec doesn't support nan behavior modes\n",
- __FUNCTION__);
if (type.width == 8) {
if (!type.sign) {
intrinsic = "llvm.ppc.altivec.vmaxub";
if(intrinsic) {
if (util_cpu_caps.has_sse && type.floating &&
nan_behavior != GALLIVM_NAN_BEHAVIOR_UNDEFINED &&
- nan_behavior != GALLIVM_NAN_RETURN_SECOND) {
+ nan_behavior != GALLIVM_NAN_RETURN_OTHER_SECOND_NONNAN) {
LLVMValueRef isnan, min;
min = lp_build_intrinsic_binary_anylength(bld->gallivm, intrinsic,
type,
return lp_build_select(bld, cond, a, b);
}
break;
- case GALLIVM_NAN_RETURN_SECOND:
+ case GALLIVM_NAN_RETURN_OTHER_SECOND_NONNAN:
cond = lp_build_cmp_ordered(bld, PIPE_FUNC_GREATER, a, b);
return lp_build_select(bld, cond, a, b);
case GALLIVM_NAN_BEHAVIOR_UNDEFINED:
/**
* Generate clamp(a, min, max)
+ * NaN behavior (for any of a, min, max) is undefined.
* Do checks for special cases.
*/
LLVMValueRef
}
+/**
+ * Generate clamp(a, 0, 1)
+ * A NaN will get converted to zero.
+ */
+LLVMValueRef
+lp_build_clamp_zero_one_nanzero(struct lp_build_context *bld,
+ LLVMValueRef a)
+{
+ a = lp_build_max_ext(bld, a, bld->zero, GALLIVM_NAN_RETURN_OTHER_SECOND_NONNAN);
+ a = lp_build_min(bld, a, bld->one);
+ return a;
+}
+
+
/**
* Generate abs(a)
*/
assert(lp_check_value(bld->type, a));
-#if HAVE_LLVM >= 0x0207
if (bld->type.floating)
a = LLVMBuildFNeg(builder, a, "");
else
-#endif
a = LLVMBuildNeg(builder, a, "");
return a;
};
-void
-lp_build_exp2_approx(struct lp_build_context *bld,
- LLVMValueRef x,
- LLVMValueRef *p_exp2_int_part,
- LLVMValueRef *p_frac_part,
- LLVMValueRef *p_exp2)
+LLVMValueRef
+lp_build_exp2(struct lp_build_context *bld,
+ LLVMValueRef x)
{
LLVMBuilderRef builder = bld->gallivm->builder;
const struct lp_type type = bld->type;
assert(lp_check_value(bld->type, x));
- if(p_exp2_int_part || p_frac_part || p_exp2) {
- /* TODO: optimize the constant case */
- if (gallivm_debug & GALLIVM_DEBUG_PERF &&
- LLVMIsConstant(x)) {
- debug_printf("%s: inefficient/imprecise constant arithmetic\n",
- __FUNCTION__);
- }
- assert(type.floating && type.width == 32);
+ /* TODO: optimize the constant case */
+ if (gallivm_debug & GALLIVM_DEBUG_PERF &&
+ LLVMIsConstant(x)) {
+ debug_printf("%s: inefficient/imprecise constant arithmetic\n",
+ __FUNCTION__);
+ }
- /* We want to preserve NaN and make sure than for exp2 if x > 128,
- * the result is INF and if it's smaller than -126.9 the result is 0 */
- x = lp_build_min_ext(bld, lp_build_const_vec(bld->gallivm, type, 128.0), x,
- GALLIVM_NAN_RETURN_SECOND);
- x = lp_build_max_ext(bld, lp_build_const_vec(bld->gallivm, type, -126.99999), x,
- GALLIVM_NAN_RETURN_SECOND);
+ assert(type.floating && type.width == 32);
- /* ipart = floor(x) */
- /* fpart = x - ipart */
- lp_build_ifloor_fract(bld, x, &ipart, &fpart);
- }
+ /* We want to preserve NaN and make sure than for exp2 if x > 128,
+ * the result is INF and if it's smaller than -126.9 the result is 0 */
+ x = lp_build_min_ext(bld, lp_build_const_vec(bld->gallivm, type, 128.0), x,
+ GALLIVM_NAN_RETURN_OTHER_SECOND_NONNAN);
+ x = lp_build_max(bld, lp_build_const_vec(bld->gallivm, type, -126.99999), x);
- if(p_exp2_int_part || p_exp2) {
- /* expipart = (float) (1 << ipart) */
- expipart = LLVMBuildAdd(builder, ipart,
- lp_build_const_int_vec(bld->gallivm, type, 127), "");
- expipart = LLVMBuildShl(builder, expipart,
- lp_build_const_int_vec(bld->gallivm, type, 23), "");
- expipart = LLVMBuildBitCast(builder, expipart, vec_type, "");
- }
+ /* ipart = floor(x) */
+ /* fpart = x - ipart */
+ lp_build_ifloor_fract(bld, x, &ipart, &fpart);
- if(p_exp2) {
- expfpart = lp_build_polynomial(bld, fpart, lp_build_exp2_polynomial,
- Elements(lp_build_exp2_polynomial));
- res = LLVMBuildFMul(builder, expipart, expfpart, "");
- }
- if(p_exp2_int_part)
- *p_exp2_int_part = expipart;
+ /* expipart = (float) (1 << ipart) */
+ expipart = LLVMBuildAdd(builder, ipart,
+ lp_build_const_int_vec(bld->gallivm, type, 127), "");
+ expipart = LLVMBuildShl(builder, expipart,
+ lp_build_const_int_vec(bld->gallivm, type, 23), "");
+ expipart = LLVMBuildBitCast(builder, expipart, vec_type, "");
- if(p_frac_part)
- *p_frac_part = fpart;
- if(p_exp2)
- *p_exp2 = res;
-}
+ expfpart = lp_build_polynomial(bld, fpart, lp_build_exp2_polynomial,
+ Elements(lp_build_exp2_polynomial));
+
+ res = LLVMBuildFMul(builder, expipart, expfpart, "");
-LLVMValueRef
-lp_build_exp2(struct lp_build_context *bld,
- LLVMValueRef x)
-{
- LLVMValueRef res;
- lp_build_exp2_approx(bld, x, NULL, NULL, &res);
return res;
}
+
/**
* Extract the exponent of a IEEE-754 floating point value.
*
return ret;
}
+
+LLVMValueRef
+lp_build_fpstate_get(struct gallivm_state *gallivm)
+{
+ if (util_cpu_caps.has_sse) {
+ LLVMBuilderRef builder = gallivm->builder;
+ LLVMValueRef mxcsr_ptr = lp_build_alloca(
+ gallivm,
+ LLVMInt32TypeInContext(gallivm->context),
+ "mxcsr_ptr");
+ LLVMValueRef mxcsr_ptr8 = LLVMBuildPointerCast(builder, mxcsr_ptr,
+ LLVMPointerType(LLVMInt8TypeInContext(gallivm->context), 0), "");
+ lp_build_intrinsic(builder,
+ "llvm.x86.sse.stmxcsr",
+ LLVMVoidTypeInContext(gallivm->context),
+ &mxcsr_ptr8, 1);
+ return mxcsr_ptr;
+ }
+ return 0;
+}
+
+void
+lp_build_fpstate_set_denorms_zero(struct gallivm_state *gallivm,
+ boolean zero)
+{
+ if (util_cpu_caps.has_sse) {
+ /* turn on DAZ (64) | FTZ (32768) = 32832 if available */
+ int daz_ftz = _MM_FLUSH_ZERO_MASK;
+
+ LLVMBuilderRef builder = gallivm->builder;
+ LLVMValueRef mxcsr_ptr = lp_build_fpstate_get(gallivm);
+ LLVMValueRef mxcsr =
+ LLVMBuildLoad(builder, mxcsr_ptr, "mxcsr");
+
+ if (util_cpu_caps.has_daz) {
+ /* Enable denormals are zero mode */
+ daz_ftz |= _MM_DENORMALS_ZERO_MASK;
+ }
+ if (zero) {
+ mxcsr = LLVMBuildOr(builder, mxcsr,
+ LLVMConstInt(LLVMTypeOf(mxcsr), daz_ftz, 0), "");
+ } else {
+ mxcsr = LLVMBuildAnd(builder, mxcsr,
+ LLVMConstInt(LLVMTypeOf(mxcsr), ~daz_ftz, 0), "");
+ }
+
+ LLVMBuildStore(builder, mxcsr, mxcsr_ptr);
+ lp_build_fpstate_set(gallivm, mxcsr_ptr);
+ }
+}
+
+void
+lp_build_fpstate_set(struct gallivm_state *gallivm,
+ LLVMValueRef mxcsr_ptr)
+{
+ if (util_cpu_caps.has_sse) {
+ LLVMBuilderRef builder = gallivm->builder;
+ mxcsr_ptr = LLVMBuildPointerCast(builder, mxcsr_ptr,
+ LLVMPointerType(LLVMInt8TypeInContext(gallivm->context), 0), "");
+ lp_build_intrinsic(builder,
+ "llvm.x86.sse.ldmxcsr",
+ LLVMVoidTypeInContext(gallivm->context),
+ &mxcsr_ptr, 1);
+ }
+}
projects / mesa.git / blobdiff