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Bugfix for non-const shift amt and unit tests.

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This commit is contained in:
james.brodman
2013-10-22 18:29:20 -04:00
parent 899f85ce9c
commit f97a2d68c8
4 changed files with 44 additions and 3 deletions
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4
builtins/util.m4
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@@ -815,7 +815,6 @@ forloop(i, 1, eval(WIDTH-1), ` %ret_`'i = insertelement <WIDTH x $1> %ret_`'eva
ret <WIDTH x $1> %ret_`'eval(WIDTH-1)
not_const:
; store two instances of the vector into memory
%ptr = alloca <WIDTH x $1>, i32 3
%ptr0 = getelementptr <WIDTH x $1> * %ptr, i32 0
store <WIDTH x $1> zeroinitializer, <WIDTH x $1> * %ptr0
@@ -824,8 +823,7 @@ not_const:
%ptr2 = getelementptr <WIDTH x $1> * %ptr, i32 2
store <WIDTH x $1> zeroinitializer, <WIDTH x $1> * %ptr2
; compute offset in [0,vectorwidth-1], then index into the doubled-up vector
%offset = add i32 %1, 16
%offset = add i32 %1, WIDTH
%ptr_as_elt_array = bitcast <WIDTH x $1> * %ptr to [eval(3*WIDTH) x $1] *
%load_ptr = getelementptr [eval(3*WIDTH) x $1] * %ptr_as_elt_array, i32 0, i32 %offset
%load_ptr_vec = bitcast $1 * %load_ptr to <WIDTH x $1> *

14
tests/shift-1.ispc Normal file
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@@ -0,0 +1,14 @@
export uniform int width() { return programCount; }
export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
int a = aFOO[programIndex];
int rot = shift(a, -1);
RET[programIndex] = rot;
}
export void result(uniform float RET[]) {
varying int val = programIndex;
if (val < 0) val = 0;
RET[programIndex] = val;
}

15
tests/shift-2.ispc Normal file
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@@ -0,0 +1,15 @@
export uniform int width() { return programCount; }
export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
int a = aFOO[programIndex];
uniform int delta = b - 6; // -1
int rot = shift(a, delta);
RET[programIndex] = rot;
}
export void result(uniform float RET[]) {
varying int val = programIndex;
if (val < 0) val = 0;
RET[programIndex] = val;
}

14
tests/shift-3.ispc Normal file
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@@ -0,0 +1,14 @@
export uniform int width() { return programCount; }
export void f_fu(uniform float RET[], uniform float aFOO[], uniform float b) {
int a = aFOO[programIndex];
int rot = shift(a, 1);
RET[programIndex] = rot;
}
export void result(uniform float RET[]) {
varying int val = 2 + programIndex;
if (val > programCount) val = 0;
RET[programIndex] = val;
}