[Mesa-dev] [PATCH v1] Remove UINT_AS_FLT, INT_AS_FLT, FLOAT_AS_FLT macros.No functional changes, only bug fixed.
Neil Roberts
neil at linux.intel.com
Thu Jan 22 05:32:11 PST 2015
Hi,
The COPY_CLEAN_4V_TYPE_AS_FLOAT still doesn't look right because as the
last step it calls COPY_SZ_4V which will copy its float arguments using
floating-point registers. It seems the piglit test case is still failing
and if I step through with GDB I can see that it is hitting this code
and using the floating-point registers to do the copy. Are you compiling
your Mesa with -O3? It would be worth initially trying to replicate the
test failure and then verifying that the patch fixes at least the piglit
test before posting it.
I agree that this function should be changed to take pointers to
gl_constant_values instead of GLfloats as suggested by Ian in his review
for the previous version.
Regards,
- Neil
marius.predut at intel.com writes:
> From: Marius Predut <marius.predut at intel.com>
>
> On 32-bit, for floating point operations is used x86 FPU registers instead SSE,
> reason for when reinterprets an integer as a float result is unexpected
> (modify floats when they are written to memory).
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82668
>
> Signed-off-by: Marius Predut <marius.predut at intel.com>
> ---
> src/mesa/main/context.c | 3 ++-
> src/mesa/main/macros.h | 32 ++++++++++++++++----------------
> src/mesa/vbo/vbo_attrib_tmp.h | 20 ++++++++++++++++----
> src/mesa/vbo/vbo_exec.h | 3 ++-
> src/mesa/vbo/vbo_exec_api.c | 25 ++++++++++++-------------
> src/mesa/vbo/vbo_exec_eval.c | 22 +++++++++++++++++-----
> src/mesa/vbo/vbo_save_api.c | 10 +++++-----
> 7 files changed, 70 insertions(+), 45 deletions(-)
>
> diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
> index 400c158..11ab8a9 100644
> --- a/src/mesa/main/context.c
> +++ b/src/mesa/main/context.c
> @@ -134,6 +134,7 @@
> #include "math/m_matrix.h"
> #include "main/dispatch.h" /* for _gloffset_COUNT */
> #include "uniforms.h"
> +#include "macros.h"
>
> #ifdef USE_SPARC_ASM
> #include "sparc/sparc.h"
> @@ -656,7 +657,7 @@ _mesa_init_constants(struct gl_constants *consts, gl_api api)
> consts->MaxSamples = 0;
>
> /* GLSL default if NativeIntegers == FALSE */
> - consts->UniformBooleanTrue = FLT_AS_UINT(1.0f);
> + consts->UniformBooleanTrue = FLOAT_AS_UNION(1.0f).u;
>
> /* GL_ARB_sync */
> consts->MaxServerWaitTimeout = 0x1fff7fffffffULL;
> diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h
> index cd5f2d6..12c9997 100644
> --- a/src/mesa/main/macros.h
> +++ b/src/mesa/main/macros.h
> @@ -32,6 +32,7 @@
> #define MACROS_H
>
> #include "imports.h"
> +#include "program/prog_parameter.h"
>
>
> /**
> @@ -170,27 +171,26 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256];
> ub = ((GLubyte) F_TO_I((f) * 255.0F))
> #endif
>
> -static inline GLfloat INT_AS_FLT(GLint i)
> +static union gl_constant_value UINT_AS_UNION(GLuint u)
> {
> - fi_type tmp;
> - tmp.i = i;
> - return tmp.f;
> + union gl_constant_value tmp;
> + tmp.u = u;
> + return tmp;
> }
>
> -static inline GLfloat UINT_AS_FLT(GLuint u)
> +static inline union gl_constant_value INT_AS_UNION(GLint i)
> {
> - fi_type tmp;
> - tmp.u = u;
> - return tmp.f;
> + union gl_constant_value tmp;
> + tmp.i = i;
> + return tmp;
> }
>
> -static inline unsigned FLT_AS_UINT(float f)
> +static inline union gl_constant_value FLOAT_AS_UNION(GLfloat f)
> {
> - fi_type tmp;
> + union gl_constant_value tmp;
> tmp.f = f;
> - return tmp.u;
> + return tmp;
> }
> -
> /**
> * Convert a floating point value to an unsigned fixed point value.
> *
> @@ -628,12 +628,12 @@ COPY_CLEAN_4V_TYPE_AS_FLOAT(GLfloat dst[4], int sz, const GLfloat src[4],
> ASSIGN_4V(dst, 0, 0, 0, 1);
> break;
> case GL_INT:
> - ASSIGN_4V(dst, INT_AS_FLT(0), INT_AS_FLT(0),
> - INT_AS_FLT(0), INT_AS_FLT(1));
> + ASSIGN_4V(dst, INT_AS_UNION(0).f, INT_AS_UNION(0).f,
> + INT_AS_UNION(0).f, INT_AS_UNION(1).f);
> break;
> case GL_UNSIGNED_INT:
> - ASSIGN_4V(dst, UINT_AS_FLT(0), UINT_AS_FLT(0),
> - UINT_AS_FLT(0), UINT_AS_FLT(1));
> + ASSIGN_4V(dst, UINT_AS_UNION(0).f, UINT_AS_UNION(0).f,
> + UINT_AS_UNION(0).f, UINT_AS_UNION(1).f);
> break;
> default:
> ASSIGN_4V(dst, 0.0f, 0.0f, 0.0f, 1.0f); /* silence warnings */
> diff --git a/src/mesa/vbo/vbo_attrib_tmp.h b/src/mesa/vbo/vbo_attrib_tmp.h
> index ec66934..17a0a10 100644
> --- a/src/mesa/vbo/vbo_attrib_tmp.h
> +++ b/src/mesa/vbo/vbo_attrib_tmp.h
> @@ -28,6 +28,18 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
> #include "util/u_format_r11g11b10f.h"
> #include "main/varray.h"
>
> +
> +/* ATTR */
> +#define ATTR( A, N, T, V0, V1, V2, V3 ) ATTR_##T((A), (N), (T), (V0), (V1), (V2), (V3))
> +
> +#define ATTR_GL_UNSIGNED_INT( A, N, T, V0, V1, V2, V3 ) \
> + ATTR_UNION(A, N, T, UINT_AS_UNION(V0), UINT_AS_UNION(V1), UINT_AS_UNION(V2), UINT_AS_UNION(V3))
> +#define ATTR_GL_INT( A, N, T, V0, V1, V2, V3 ) \
> + ATTR_UNION(A, N, T, INT_AS_UNION(V0), INT_AS_UNION(V1), INT_AS_UNION(V2), INT_AS_UNION(V3))
> +#define ATTR_GL_FLOAT( A, N, T, V0, V1, V2, V3 ) \
> + ATTR_UNION(A, N, T, FLOAT_AS_UNION(V0), FLOAT_AS_UNION(V1), FLOAT_AS_UNION(V2), FLOAT_AS_UNION(V3))
> +
> +
> /* float */
> #define ATTR1FV( A, V ) ATTR( A, 1, GL_FLOAT, (V)[0], 0, 0, 1 )
> #define ATTR2FV( A, V ) ATTR( A, 2, GL_FLOAT, (V)[0], (V)[1], 0, 1 )
> @@ -41,8 +53,8 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
>
> /* int */
> #define ATTRI( A, N, X, Y, Z, W) ATTR( A, N, GL_INT, \
> - INT_AS_FLT(X), INT_AS_FLT(Y), \
> - INT_AS_FLT(Z), INT_AS_FLT(W) )
> + X, Y, \
> + Z, W )
>
> #define ATTR2IV( A, V ) ATTRI( A, 2, (V)[0], (V)[1], 0, 1 )
> #define ATTR3IV( A, V ) ATTRI( A, 3, (V)[0], (V)[1], (V)[2], 1 )
> @@ -56,8 +68,8 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
>
> /* uint */
> #define ATTRUI( A, N, X, Y, Z, W) ATTR( A, N, GL_UNSIGNED_INT, \
> - UINT_AS_FLT(X), UINT_AS_FLT(Y), \
> - UINT_AS_FLT(Z), UINT_AS_FLT(W) )
> + X, Y, \
> + Z, W )
>
> #define ATTR2UIV( A, V ) ATTRUI( A, 2, (V)[0], (V)[1], 0, 1 )
> #define ATTR3UIV( A, V ) ATTRUI( A, 3, (V)[0], (V)[1], (V)[2], 1 )
> diff --git a/src/mesa/vbo/vbo_exec.h b/src/mesa/vbo/vbo_exec.h
> index bb265de..7db6b6b 100644
> --- a/src/mesa/vbo/vbo_exec.h
> +++ b/src/mesa/vbo/vbo_exec.h
> @@ -38,6 +38,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
> #include "vbo.h"
> #include "vbo_attrib.h"
>
> +#include "program/prog_parameter.h"
>
> /**
> * Max number of primitives (number of glBegin/End pairs) per VBO.
> @@ -104,7 +105,7 @@ struct vbo_exec_context
> GLenum attrtype[VBO_ATTRIB_MAX];
> GLubyte active_sz[VBO_ATTRIB_MAX];
>
> - GLfloat *attrptr[VBO_ATTRIB_MAX];
> + gl_constant_value *attrptr[VBO_ATTRIB_MAX];
> struct gl_client_array arrays[VERT_ATTRIB_MAX];
>
> /* According to program mode, the values above plus current
> diff --git a/src/mesa/vbo/vbo_exec_api.c b/src/mesa/vbo/vbo_exec_api.c
> index 5f8250e..b6c1055 100644
> --- a/src/mesa/vbo/vbo_exec_api.c
> +++ b/src/mesa/vbo/vbo_exec_api.c
> @@ -46,7 +46,6 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
> #include "vbo_context.h"
> #include "vbo_noop.h"
>
> -
> #ifdef ERROR
> #undef ERROR
> #endif
> @@ -163,7 +162,7 @@ static void vbo_exec_copy_to_current( struct vbo_exec_context *exec )
>
> COPY_CLEAN_4V_TYPE_AS_FLOAT(tmp,
> exec->vtx.attrsz[i],
> - exec->vtx.attrptr[i],
> + (GLfloat*)exec->vtx.attrptr[i],
> exec->vtx.attrtype[i]);
>
> if (exec->vtx.attrtype[i] != vbo->currval[i].Type ||
> @@ -216,10 +215,10 @@ vbo_exec_copy_from_current(struct vbo_exec_context *exec)
> for (i = VBO_ATTRIB_POS + 1; i < VBO_ATTRIB_MAX; i++) {
> const GLfloat *current = (GLfloat *) vbo->currval[i].Ptr;
> switch (exec->vtx.attrsz[i]) {
> - case 4: exec->vtx.attrptr[i][3] = current[3];
> - case 3: exec->vtx.attrptr[i][2] = current[2];
> - case 2: exec->vtx.attrptr[i][1] = current[1];
> - case 1: exec->vtx.attrptr[i][0] = current[0];
> + case 4: exec->vtx.attrptr[i][3].f = current[3];
> + case 3: exec->vtx.attrptr[i][2].f = current[2];
> + case 2: exec->vtx.attrptr[i][1].f = current[1];
> + case 1: exec->vtx.attrptr[i][0].f = current[0];
> break;
> }
> }
> @@ -291,7 +290,7 @@ vbo_exec_wrap_upgrade_vertex(struct vbo_exec_context *exec,
>
> for (i = 0 ; i < VBO_ATTRIB_MAX ; i++) {
> if (exec->vtx.attrsz[i]) {
> - exec->vtx.attrptr[i] = tmp;
> + exec->vtx.attrptr[i] = (gl_constant_value*) tmp;
> tmp += exec->vtx.attrsz[i];
> }
> else
> @@ -305,8 +304,8 @@ vbo_exec_wrap_upgrade_vertex(struct vbo_exec_context *exec,
> }
> else {
> /* Just have to append the new attribute at the end */
> - exec->vtx.attrptr[attr] = exec->vtx.vertex +
> - exec->vtx.vertex_size - newSize;
> + exec->vtx.attrptr[attr] = (gl_constant_value*)(exec->vtx.vertex +
> + exec->vtx.vertex_size - newSize);
> }
>
> /* Replay stored vertices to translate them
> @@ -327,7 +326,7 @@ vbo_exec_wrap_upgrade_vertex(struct vbo_exec_context *exec,
>
> if (sz) {
> GLint old_offset = old_attrptr[j] - exec->vtx.vertex;
> - GLint new_offset = exec->vtx.attrptr[j] - exec->vtx.vertex;
> + GLint new_offset = (GLfloat*)exec->vtx.attrptr[j] - exec->vtx.vertex;
>
> if (j == attr) {
> if (oldSize) {
> @@ -383,7 +382,7 @@ vbo_exec_fixup_vertex(struct gl_context *ctx, GLuint attr, GLuint newSize)
> * zeros. Don't need to flush or wrap.
> */
> for (i = newSize; i <= exec->vtx.attrsz[attr]; i++)
> - exec->vtx.attrptr[attr][i-1] = id[i-1];
> + exec->vtx.attrptr[attr][i-1].f = id[i-1];
> }
>
> exec->vtx.active_sz[attr] = newSize;
> @@ -401,7 +400,7 @@ vbo_exec_fixup_vertex(struct gl_context *ctx, GLuint attr, GLuint newSize)
> * This macro is used to implement all the glVertex, glColor, glTexCoord,
> * glVertexAttrib, etc functions.
> */
> -#define ATTR( A, N, T, V0, V1, V2, V3 ) \
> +#define ATTR_UNION( A, N, T, V0, V1, V2, V3 ) \
> do { \
> struct vbo_exec_context *exec = &vbo_context(ctx)->exec; \
> \
> @@ -412,7 +411,7 @@ do { \
> vbo_exec_fixup_vertex(ctx, A, N); \
> \
> { \
> - GLfloat *dest = exec->vtx.attrptr[A]; \
> + gl_constant_value *dest = exec->vtx.attrptr[A]; \
> if (N>0) dest[0] = V0; \
> if (N>1) dest[1] = V1; \
> if (N>2) dest[2] = V2; \
> diff --git a/src/mesa/vbo/vbo_exec_eval.c b/src/mesa/vbo/vbo_exec_eval.c
> index 82f89b9..670e763 100644
> --- a/src/mesa/vbo/vbo_exec_eval.c
> +++ b/src/mesa/vbo/vbo_exec_eval.c
> @@ -33,6 +33,18 @@
> #include "vbo_exec.h"
>
>
> +/** Copy \p SZ elements into a 4-element vector */
> +#define COPY_UNION_SZ_4V(DST, SZ, SRC) \
> +do { \
> + switch (SZ) { \
> + case 4: (DST)[3].f = (SRC)[3]; \
> + case 3: (DST)[2].f = (SRC)[2]; \
> + case 2: (DST)[1].f = (SRC)[1]; \
> + case 1: (DST)[0].f = (SRC)[0]; \
> + } \
> +} while(0)
> +
> +
> static void clear_active_eval1( struct vbo_exec_context *exec, GLuint attr )
> {
> assert(attr < Elements(exec->eval.map1));
> @@ -138,9 +150,9 @@ void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u)
> exec->eval.map1[attr].sz,
> map->Order);
>
> - COPY_SZ_4V( exec->vtx.attrptr[attr],
> - exec->vtx.attrsz[attr],
> - data );
> + COPY_UNION_SZ_4V( exec->vtx.attrptr[attr],
> + exec->vtx.attrsz[attr],
> + data );
> }
> }
>
> @@ -186,7 +198,7 @@ void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
> exec->eval.map2[attr].sz,
> map->Uorder, map->Vorder);
>
> - COPY_SZ_4V( exec->vtx.attrptr[attr],
> + COPY_UNION_SZ_4V( exec->vtx.attrptr[attr],
> exec->vtx.attrsz[attr],
> data );
> }
> @@ -225,7 +237,7 @@ void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
> NORMALIZE_3FV(normal);
> normal[3] = 1.0;
>
> - COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
> + COPY_UNION_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
> exec->vtx.attrsz[VBO_ATTRIB_NORMAL],
> normal );
>
> diff --git a/src/mesa/vbo/vbo_save_api.c b/src/mesa/vbo/vbo_save_api.c
> index 5055c22..2a43f15 100644
> --- a/src/mesa/vbo/vbo_save_api.c
> +++ b/src/mesa/vbo/vbo_save_api.c
> @@ -769,7 +769,7 @@ _save_reset_vertex(struct gl_context *ctx)
> * 3f version won't otherwise set color[3] to 1.0 -- this is the job
> * of the chooser function when switching between Color4f and Color3f.
> */
> -#define ATTR(A, N, T, V0, V1, V2, V3) \
> +#define ATTR_UNION(A, N, T, V0, V1, V2, V3) \
> do { \
> struct vbo_save_context *save = &vbo_context(ctx)->save; \
> \
> @@ -778,10 +778,10 @@ do { \
> \
> { \
> GLfloat *dest = save->attrptr[A]; \
> - if (N>0) dest[0] = V0; \
> - if (N>1) dest[1] = V1; \
> - if (N>2) dest[2] = V2; \
> - if (N>3) dest[3] = V3; \
> + if (N>0) dest[0] = V0.f; \
> + if (N>1) dest[1] = V1.f; \
> + if (N>2) dest[2] = V2.f; \
> + if (N>3) dest[3] = V3.f; \
> save->attrtype[A] = T; \
> } \
> \
> --
> 1.7.9.5
>
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